技术领域technical field
本发明属于瓦斯吸附解吸试验装置技术领域，尤其涉及一种高低温高压吸附解吸试验装置与方法。The invention belongs to the technical field of gas adsorption and desorption test devices, and in particular relates to a high-low temperature, high-pressure adsorption and desorption test device and method.
背景技术Background technique
煤层气产生于成煤过程中，主要以吸附状态储存于煤层中。随着煤层开采深度的加大，含瓦斯煤层的微孔隙、低渗透、高吸附的赋存特征越来越显现出来。在煤与瓦斯共采过程中，瓦斯难以抽采所导致的煤矿安全事故及能源浪费问题困扰着煤矿的生产。因此模拟深部煤层储存环境，进行吸附解吸实验，探寻煤层吸附瓦斯机理，对深部煤层瓦斯灾害防治和煤层气的勘探与开发有重要的理论意义。Coalbed methane is produced in the coal-forming process and is mainly stored in the coal seam in the state of adsorption. With the increase of coal seam mining depth, the occurrence characteristics of microporosity, low permeability and high adsorption of gas-bearing coal seams are becoming more and more apparent. In the process of co-mining coal and gas, coal mine safety accidents and energy waste caused by difficult gas extraction plague the production of coal mines. Therefore, simulating the storage environment of deep coal seams, conducting adsorption and desorption experiments, and exploring the mechanism of gas adsorption in coal seams have important theoretical significance for the prevention and control of gas disasters in deep coal seams and the exploration and development of coal bed methane.
煤层的瓦斯含量是矿井生产和科研的重要基础资料，其取值的准确性对于瓦斯涌出量预测、瓦斯地质评价、煤矿瓦斯综合治理以及综合利用具有重要意义。但在瓦斯含量测定过程中，钻孔取样使煤样温度升高，煤芯瓦斯放散速度加快，造成瓦斯含量测定值偏低。目前，冷冻取样法成为瓦斯含量准确测定的一个新的技术途径，因此，低温环境下煤的瓦斯吸附解吸特性的研究就尤为重要。同时，甲烷的临界温度-82.6℃，临界压力4.5MPa。在临界点附近，甲烷有很强的可压缩性，适当增加压力可使它的密度接近一般液体，此时甲烷的密度、粘度、溶解度、热容量、介电常数等性质发生剧烈的变化。因此研究甲烷在该环境条件下的相态变化及吸附解吸特性，对瓦斯的高效抽采及利用具有重要的现实意义。The gas content of coal seams is an important basic data for mine production and scientific research. The accuracy of its value is of great significance for the prediction of gas emission, gas geological evaluation, comprehensive control and comprehensive utilization of coal mine gas. However, in the process of measuring the gas content, the temperature of the coal sample is raised by drilling samples, and the rate of gas release in the coal core is accelerated, resulting in a low gas content measurement value. At present, the freezing sampling method has become a new technical approach for accurate determination of gas content. Therefore, the study of gas adsorption and desorption characteristics of coal in low temperature environment is particularly important. At the same time, the critical temperature of methane is -82.6°C and the critical pressure is 4.5MPa. Near the critical point, methane has strong compressibility, and increasing the pressure appropriately can make its density close to that of ordinary liquids. At this time, the properties of methane such as density, viscosity, solubility, heat capacity, and dielectric constant change drastically. Therefore, it is of great practical significance to study the phase change and adsorption and desorption characteristics of methane under this environmental condition for the efficient extraction and utilization of gas.
目前，已公开的专利文献“煤的高压等温吸附实验装置”（CN202502025U）、“变压条件下煤样瓦斯吸附解吸实验装置”（CN203705293U）、“一种瓦斯吸附解吸试验装置”（CN103033442A）等，都采用的是水浴加热方式，不能进行低于室温环境的实验；“一种高温高压吸附解吸装置及其使用方法”（CN104062204A）采用硅油为介质的恒温油槽加热方式，实验环境恶劣，操作复杂，同样不能进行低温下的吸附解吸实验。并且上述装置自动化程度较低，可承受的压力范围小，气密性不足，能同时进行的实验样品量少，实验效率低。At present, the published patent documents "High-pressure isothermal adsorption test device for coal" (CN202502025U), "gas adsorption and desorption test device for coal samples under variable pressure conditions" (CN203705293U), "a gas adsorption and desorption test device" (CN103033442A), etc. , all adopt the heating method of water bath, and experiments under room temperature cannot be carried out; "A high-temperature and high-pressure adsorption and desorption device and its use method" (CN104062204A) adopts the heating method of constant temperature oil tank with silicone oil as the medium, and the experimental environment is harsh and the operation is complicated , the adsorption-desorption experiment at low temperature cannot be carried out. Moreover, the above-mentioned device has a low degree of automation, a small pressure range to withstand, insufficient airtightness, a small amount of experimental samples that can be carried out at the same time, and low experimental efficiency.
发明内容Contents of the invention
本发明为了解决现有技术中的不足之处，提供了一种试验操作简便、试验精度高、试验数据精确，能够自动采集数据并且试验效率高的高低温高压吸附解吸试验装置。In order to solve the deficiencies in the prior art, the present invention provides a high-low temperature and high-pressure adsorption and desorption test device with simple test operation, high test precision, accurate test data, automatic data collection and high test efficiency.
为解决上述技术问题，本发明采用如下技术方案：高低温高压吸附解吸试验装置，包括充气系统、脱气系统、吸附系统、解吸系统、温度控制系统和数据采集系统；In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a high-low temperature, high-pressure adsorption and desorption test device, including an inflation system, a degassing system, an adsorption system, a desorption system, a temperature control system and a data acquisition system;
充气系统包括甲烷充气单元和氦气充气单元，甲烷充气单元包括高压甲烷气瓶、甲烷储气罐和第一五通阀，高压甲烷气瓶和甲烷储气罐之间通过高压管连通，高压甲烷气瓶和甲烷储气罐之间的高压管上沿甲烷气体流通方向依次串联设有第一气体减压阀和高压气体增压泵，第一五通阀包括第一阀体，第一阀体上设有第一接口、第二接口、第三接口、第四接口和第五接口，阀体上设有与第一至第五接口相对应的五个接口开关，甲烷储气罐通过高压管与第四接口连接；氦气充气单元包括高压氦气瓶和第二气体减压阀，高压氦气瓶通过高压管与第二接口连接，第二气体减压阀设置在高压氦气瓶与第二接口之间的高压管上；The inflation system includes a methane inflation unit and a helium inflation unit. The methane inflation unit includes a high-pressure methane gas cylinder, a methane gas storage tank and the first five-way valve. The high-pressure methane gas cylinder and the methane gas storage tank are connected through a high-pressure pipe. The high-pressure pipe between the gas cylinder and the methane gas storage tank is provided with a first gas pressure reducing valve and a high-pressure gas booster pump in series along the flow direction of methane gas. The first five-way valve includes a first valve body, and the first valve body There are first interface, second interface, third interface, fourth interface and fifth interface on the valve body, five interface switches corresponding to the first to fifth interfaces are arranged on the valve body, and the methane gas storage tank passes through the high-pressure pipe It is connected with the fourth interface; the helium gas charging unit includes a high-pressure helium cylinder and a second gas decompression valve, the high-pressure helium cylinder is connected to the second interface through a high-pressure tube, and the second gas decompression valve is set between the high-pressure helium cylinder and the second gas decompression valve. On the high-pressure pipe between the two interfaces;
脱气系统包括真空泵、真空容器、真空计和第二五通阀，第二五通阀包括第二阀体，第二阀体上设有第六接口、第七接口、第八接口、第九接口和第十接口，第二阀体上设有与第六至第十接口相对应的五个接口开关，真空泵通过高压管与真空容器连接，真空计设在真空容器上，真空容器通过高压管与第三接口连接，第一五通阀的第一接口与第二五通阀的第八接口通过高压管连接，第一五通阀的第五接口与第二五通阀的第九接口通过高压管连接；The degassing system includes a vacuum pump, a vacuum container, a vacuum gauge, and a second five-way valve. The second five-way valve includes a second valve body, and the second valve body is provided with a sixth interface, a seventh interface, an eighth interface, and a ninth interface. interface and the tenth interface, the second valve body is equipped with five interface switches corresponding to the sixth to tenth interfaces, the vacuum pump is connected to the vacuum container through the high pressure tube, the vacuum gauge is set on the vacuum container, and the vacuum container is connected to the vacuum container through the high pressure tube Connected to the third port, the first port of the first five-way valve is connected to the eighth port of the second five-way valve through a high-pressure pipe, the fifth port of the first five-way valve is connected to the ninth port of the second five-way valve through High pressure pipe connection;
温度控制系统包括高温单元和低温单元，高温单元包括高温恒温箱和设在高温恒温箱上的第一控制面板，第一控制面板上设有第一温控仪、第一电源开关、加热开关、指示灯开关和由加热开关控制的加热器；低温单元包括低温恒温箱和设在低温恒温箱上的第二控制面板，第二控制面板上设有第二温控仪、第二电源开关、制冷开关和由制冷开关控制的制冷单元；The temperature control system includes a high-temperature unit and a low-temperature unit. The high-temperature unit includes a high-temperature constant temperature box and a first control panel arranged on the high-temperature constant temperature box. The first control panel is provided with a first temperature controller, a first power switch, a heating switch, The indicator light switch and the heater controlled by the heating switch; the low-temperature unit includes a low-temperature thermostat box and a second control panel arranged on the low-temperature thermostat box, and the second control panel is provided with a second temperature controller, a second power switch, a refrigeration switch and refrigeration unit controlled by the refrigeration switch;
吸附系统包括高温吸附单元和低温吸附单元，高温吸附单元包括设置在高温恒温箱内的第一气体缓冲罐和若干煤样罐，第一气体缓冲罐和每个煤样罐分别通过连接管并联设置在第一接口与第八接口之间的高压管上，第一接口与第八接口之间的高压管上沿气体流通方向依次串联设有第一气动阀和第一压力传感器，第一气体缓冲罐上设有第一温度传感器和第二压力传感器，第一气体缓冲罐上连接的连接管上设有第二气动阀，每个煤样罐上分别设有第二温度传感器和第三压力传感器，每个煤样罐上连接的连接管上分别设有第三气动阀；The adsorption system includes a high-temperature adsorption unit and a low-temperature adsorption unit. The high-temperature adsorption unit includes a first gas buffer tank and several coal sample tanks arranged in a high-temperature constant temperature box. The first gas buffer tank and each coal sample tank are respectively arranged in parallel through connecting pipes. On the high-pressure pipe between the first port and the eighth port, a first pneumatic valve and a first pressure sensor are arranged in series along the gas flow direction on the high-pressure pipe between the first port and the eighth port, and the first gas buffer A first temperature sensor and a second pressure sensor are set on the tank, a second pneumatic valve is set on the connecting pipe connected to the first gas buffer tank, and a second temperature sensor and a third pressure sensor are respectively set on each coal sample tank , the connecting pipe connected to each coal sample tank is respectively provided with a third pneumatic valve;
低温吸附单元包括设置在低温恒温箱内的第二气体缓冲罐和若干煤样罐，第二气体缓冲罐和每个煤样罐分别通过连接管并联设置在第五接口和第九接口之间的高压管上，第五接口与第九接口之间的高压管上沿气体流通方向依次串联设有第四气动阀和第四压力传感器，第二气体缓冲罐上设有第三温度传感器和第五压力传感器，第二气体缓冲罐上连接的连接管上设有第五气动阀，每个煤样罐上分别设有第四温度传感器和第六压力传感器，每个煤样罐上连接的连接管上分别设有第六气动阀；The low-temperature adsorption unit includes a second gas buffer tank and several coal sample tanks arranged in a low-temperature thermostat, and the second gas buffer tank and each coal sample tank are respectively arranged in parallel between the fifth interface and the ninth interface through connecting pipes. On the high-pressure pipe, the fourth pneumatic valve and the fourth pressure sensor are arranged in series along the gas flow direction on the high-pressure pipe between the fifth interface and the ninth interface, and the third temperature sensor and the fifth pressure sensor are arranged on the second gas buffer tank. The pressure sensor, the connecting pipe connected to the second gas buffer tank is provided with the fifth pneumatic valve, the fourth temperature sensor and the sixth pressure sensor are respectively provided on each coal sample tank, the connecting pipe connected to each coal sample tank There are sixth pneumatic valves respectively;
解吸系统包括气排水计量装置、电子天平和若干并联在一起的解吸气体流量计，各解吸气体流量计的量程互不相同，每个解吸气体流量计分别通过高压管与第七接口连接，每个解吸气体流量计与第七接口之间的高压管上分别设有第七气动阀；The desorption system includes a gas drainage metering device, an electronic balance and a number of desorption gas flowmeters connected in parallel. The measuring ranges of each desorption gas flowmeter are different from each other. A seventh pneumatic valve is respectively arranged on the high-pressure pipe between the desorption gas flowmeter and the seventh interface;
气排水计量装置包括储水容器、排水管和集水容器，储水容器上端通过高压管与第六接口连接，储水容器与第六接口之间的高压管上设有第八气动阀，排水管一端与储水容器底部连通，排水管另一端与集水容器顶部连通，集水容器放置在电子天平上，第十接口上连接有排空管，排空管上设有第九气动阀；The air drainage metering device includes a water storage container, a drain pipe and a water collection container. The upper end of the water storage container is connected to the sixth interface through a high-pressure pipe, and an eighth pneumatic valve is arranged on the high-pressure pipe between the water storage container and the sixth interface. One end of the pipe is connected with the bottom of the water storage container, the other end of the drain pipe is connected with the top of the water collection container, the water collection container is placed on the electronic balance, the tenth interface is connected with an emptying pipe, and the ninth pneumatic valve is arranged on the emptying pipe;
数据采集系统包括计算机和控制单元，控制单元包括第三控制面板，第三控制面板上设有压力巡检仪、温度巡检仪、流量计显示器、用于控制第二电源开关的低温恒温箱开关、用于控制第一电源开关的高温恒温箱开关，以及用于控制压力巡检仪和温度巡检仪的第三电源开关，计算机控制连接第一气体减压阀、第二气体减压阀、第一五通阀、第二五通阀及第一至第九气动阀。The data acquisition system includes a computer and a control unit, the control unit includes a third control panel, and the third control panel is provided with a pressure inspection instrument, a temperature inspection instrument, a flowmeter display, and a low temperature thermostat switch for controlling the second power switch , a high-temperature thermostat switch for controlling the first power switch, and a third power switch for controlling the pressure inspection instrument and the temperature inspection instrument, and the computer controls and connects the first gas pressure reducing valve, the second gas pressure reducing valve, The first five-way valve, the second five-way valve and the first to ninth pneumatic valves.
高温吸附单元内所述煤样罐为五个，分别为第一煤样罐、第二煤样罐、第三煤样罐、第四煤样罐和第五煤样罐，低温吸附单元内所述煤样罐为五个，分别为第六煤样罐、第七煤样罐、第八煤样罐、第九煤样罐和第十煤样罐。There are five coal sample tanks in the high-temperature adsorption unit, which are the first coal sample tank, the second coal sample tank, the third coal sample tank, the fourth coal sample tank and the fifth coal sample tank. There are five coal sample tanks, namely the sixth coal sample tank, the seventh coal sample tank, the eighth coal sample tank, the ninth coal sample tank and the tenth coal sample tank.
解吸系统内所述解吸气体流量计为三个，分别为第一解吸气体流量计、第二解吸气体流量计和第三解吸气体流量计，第一解吸气体流量计的量程为0-2000ml/min，第二解吸气体流量计的量程为0-500ml/min，第三解吸气体流量计的量程为0-100ml/min；所述流量计显示器为三个，分别为与第一解吸气体流量计、第二解吸气体流量计、第三解吸气体流量计相对应的第一解吸气体流量计、第二解吸气体流量计、第三解吸气体流量计。There are three desorption gas flowmeters in the desorption system, which are the first desorption gas flowmeter, the second desorption gas flowmeter and the third desorption gas flowmeter, and the range of the first desorption gas flowmeter is 0-2000ml/min , the measuring range of the second desorption gas flowmeter is 0-500ml/min, the measuring range of the third desorption gas flowmeter is 0-100ml/min; the flowmeter displays are three, which are respectively connected with the first desorption gas flowmeter, The first desorption gas flowmeter, the second desorption gas flowmeter, and the third desorption gas flowmeter correspond to the second desorption gas flowmeter and the third desorption gas flowmeter.
本发明的目的还在于提供一种高低温高压吸附解吸试验装置的试验方法，分别模拟高温条件和低温条件不同压力下的吸附解吸试验，并实现试验数据实时精确自动采集，为研究煤体瓦斯吸附解吸规律，提供更加可靠的数据基础，对瓦斯的高效抽采及利用具有重要的现实意义。The object of the present invention is also to provide a test method for a high-low temperature and high-pressure adsorption and desorption test device, which simulates the adsorption and desorption tests under different pressures under high-temperature conditions and low-temperature conditions, and realizes real-time, accurate and automatic collection of test data. The law of desorption provides a more reliable data basis, which is of great practical significance to the efficient extraction and utilization of gas.
为实现上述发明目的，本发明的高低温高压吸附解吸试验装置的试验方法依次包括以下步骤：In order to realize the above-mentioned object of the invention, the test method of the high-low temperature high-pressure adsorption-desorption test device of the present invention comprises the following steps successively:
（1）在井下采掘工作面上钻取块状新鲜煤样，进行严密封装后送至地面实验室，将新鲜煤样粉碎、筛分成不同的粒度，分别选取相应粒度的煤样进行真密度和视密度的测定；(1) Drill massive fresh coal samples on the underground mining face, seal them tightly and send them to the ground laboratory. The fresh coal samples are crushed and sieved into different particle sizes, and the coal samples with corresponding particle sizes are selected for true density and Determination of apparent density;
（2）检查试验装置确保试验装置连接可靠，打开第二气体减压阀、第一接口、第二接口、第五接口、第一气动阀、第二气动阀、第三气动阀、第四气动阀、第五气动阀和第六气动阀，将氦气充入第一气体缓冲罐、第二气体缓冲罐及第一至第十煤样罐，检查试验装置的气密性确保试验装置气密性良好，然后关闭所有气体减压阀、气动阀及接口；打开第一接口、第三接口和第五接口，打开第一气动阀、第二气动阀、第三气动阀、第四气动阀、第五气动阀和第六气动阀，启动真空泵对高温吸附单元和低温吸附单元进行脱气处理，直到真空计压力显示20Pa以下三个小时以上，然后关闭真空泵和所有气体减压阀、气动阀及接口，将电子天平放置在排空管处，将集水容器放置在电子天平上并注入水，将排空管的出口端伸入到集水容器水面以下，记录下电子天平的示数g1，打开第八接口和第十接口，打开第九气动阀，集水容器内的水流入并填充第一气动阀与第八接口之间的高压管，记录下电子天平的示数g2，g1与g2的差值所对应的水的体积即为第一气动阀与第八接口之间的高压管的体积，依次打开第二气动阀和第一至第五煤样罐上的第三气动阀，每次打开相应气动阀后待电子天平的示数稳定后，记录此时电子天平的示数并关闭该气动阀，分别测得流入水的质量，得出第一气体缓冲罐和第一至第五煤样罐的体积，关闭所有接口及气动阀，然后打开第九接口和第十接口，打开第九气动阀，集水容器内的水流入并填充第四气动阀与第九接口之间的高压管，记录下电子天平的示数，计算出第四气动阀与第九接口之间的高压管的体积，然后依次打开第五气动阀和第六至第十煤样罐上的第六气动阀，每次打开相应气动阀后待电子天平的示数稳定后，记录此时电子天平的示数并关闭该气动阀，分别测得流入水的质量，得出第二气体缓冲罐和第六至第十煤样罐的体积；(2) Check the test device to ensure that the test device is connected reliably, open the second gas pressure reducing valve, the first port, the second port, the fifth port, the first pneumatic valve, the second pneumatic valve, the third pneumatic valve, and the fourth pneumatic valve. Valve, the fifth pneumatic valve and the sixth pneumatic valve, fill helium into the first gas buffer tank, the second gas buffer tank and the first to tenth coal sample tanks, check the airtightness of the test device to ensure the airtightness of the test device If the performance is good, then close all gas pressure reducing valves, pneumatic valves and interfaces; open the first interface, the third interface and the fifth interface, open the first pneumatic valve, the second pneumatic valve, the third pneumatic valve, the fourth pneumatic valve, The fifth pneumatic valve and the sixth pneumatic valve, start the vacuum pump to degas the high-temperature adsorption unit and the low-temperature adsorption unit, until the vacuum gauge pressure shows below 20Pa for more than three hours, then turn off the vacuum pump and all gas pressure reducing valves, pneumatic valves and Interface, place the electronic balance at the emptying pipe, place the water collection container on the electronic balance and fill it with water, extend the outlet end of the emptying pipe below the water surface of the water collecting container, and record the reading of the electronic balance g1 , open the eighth interface and the tenth interface, open the ninth pneumatic valve, the water in the water collection container flows into and fills the high-pressure pipe between the first pneumatic valve and the eighth interface, and record the readings of the electronic balance g2 , g The volume of water corresponding to the difference between1 and g2 is the volume of the high-pressure pipe between the first pneumatic valve and the eighth interface. Open the second pneumatic valve and the third on the first to fifth coal sample tanks in sequence. Pneumatic valve, after opening the corresponding pneumatic valve each time, after the reading of the electronic balance is stable, record the reading of the electronic balance at this time and close the pneumatic valve, measure the quality of the inflow water respectively, and obtain the first gas buffer tank and the second gas buffer tank. The volume of the first to fifth coal sample tanks, close all ports and pneumatic valves, then open the ninth port and the tenth port, open the ninth pneumatic valve, the water in the water collection container flows into and fills the fourth pneumatic valve and the ninth port record the readings of the electronic balance, calculate the volume of the high-pressure pipe between the fourth pneumatic valve and the ninth interface, and then open the fifth pneumatic valve and the six to tenth coal sample tanks in sequence. The sixth pneumatic valve, after opening the corresponding pneumatic valve each time, after the reading of the electronic balance is stable, record the reading of the electronic balance at this time and close the pneumatic valve, respectively measure the quality of the inflowing water, and obtain the second gas buffer tank and the volumes of the sixth to tenth coal sample tanks;
（3）在第一至第十煤样罐内装填煤样，通过第一温控仪控制加热器设定高温恒温箱内的试验温度，通过第二温控仪控制制冷单元设定低温恒温箱内的试验温度，高温恒温箱温度设置范围为20℃至80℃，低温恒温箱温度设置范围为-100℃至20℃，打开第一五通阀上的第一接口、第三接口和第五接口，打开第一至第六气动阀，关闭其余接口和气动阀，启动真空泵对高温吸附单元和低温吸附单元进行脱气处理，直到真空计压力显示20Pa以下并保持三个小时以上，然后关闭真空泵和所有气动阀及接口，打开第一接口和第二接口，打开第一气动阀，开启高压氦气瓶，高压氦气经第二气体减压阀减压处理后进入高温吸附单元的高压管内，待第一压力传感器示数稳定后，关闭第一气动阀，依次打开第一至第五煤样罐上的第三气动阀，每次打开第三气动阀后待相应煤样罐上的第三压力传感器示数和第一压力传感器的示数一致时，关闭该煤样罐上的第三气动阀并记录下该煤样罐上的第三压力传感器的示数，并且再次打开第一气动阀，开启高压氦气瓶，高压氦气经第二气体减压阀减压处理后进入高温吸附单元的高压管内，待第一压力传感器示数稳定后，关闭第一气动阀，从而得出第一至第五煤样罐的自由空间体积；关闭第一接口，打开第五接口，打开第四气动阀，开启高压氦气瓶，高压氦气经第二气体减压阀减压处理后进入低温吸附单元的高压管内，待第四压力传感器示数稳定后，关闭第四气动阀，依次打开第六至第十煤样罐上的第六气动阀，每次打开第六气动阀后待相应煤样罐上的第六压力传感器示数和第四压力传感器的示数一致时，关闭该煤样罐上的第六气动阀并记录下该煤样罐上的第六压力传感器的示数，并且再次打开第四气动阀，开启高压氦气瓶，高压氦气经第二气体减压阀减压处理后进入低温吸附单元的高压管内，待第四压力传感器示数稳定后，关闭第四气动阀，从而得出第六至第十煤样罐的自由空间体积，关闭所有气动阀和接口；(3) Fill coal samples in the first to tenth coal sample tanks, control the heater through the first temperature controller to set the test temperature in the high-temperature constant temperature box, and control the refrigeration unit to set the low-temperature constant temperature box through the second temperature controller The temperature setting range of the high-temperature incubator is 20°C to 80°C, and the temperature setting range of the low-temperature incubator is -100°C to 20°C. Open the first port, the third port and the fifth port on the first five-way valve. interface, open the first to sixth pneumatic valves, close the other interfaces and pneumatic valves, start the vacuum pump to degas the high-temperature adsorption unit and the low-temperature adsorption unit, until the pressure of the vacuum gauge shows below 20Pa and keep it for more than three hours, then turn off the vacuum pump And all pneumatic valves and interfaces, open the first interface and the second interface, open the first pneumatic valve, open the high-pressure helium cylinder, the high-pressure helium gas enters the high-pressure pipe of the high-temperature adsorption unit after being decompressed by the second gas pressure reducing valve, After the reading of the first pressure sensor is stable, close the first pneumatic valve, open the third pneumatic valve on the first to fifth coal sample tanks in turn, and wait for the third pneumatic valve on the corresponding coal sample tank after opening the third pneumatic valve each time. When the reading of the pressure sensor is consistent with that of the first pressure sensor, close the third pneumatic valve on the coal sample tank and record the reading of the third pressure sensor on the coal sample tank, and open the first pneumatic valve again. valve, open the high-pressure helium cylinder, and the high-pressure helium gas enters the high-pressure pipe of the high-temperature adsorption unit after being decompressed by the second gas pressure reducing valve. The free space volume of the first to fifth coal sample tanks; close the first interface, open the fifth interface, open the fourth pneumatic valve, and open the high-pressure helium cylinder. In the high-pressure pipe of the adsorption unit, after the reading of the fourth pressure sensor is stable, close the fourth pneumatic valve, and open the sixth pneumatic valve on the sixth to tenth coal sample tanks in turn, and wait for the corresponding coal after each opening of the sixth pneumatic valve. When the reading of the sixth pressure sensor on the sample tank is consistent with the reading of the fourth pressure sensor, close the sixth pneumatic valve on the coal sample tank and record the reading of the sixth pressure sensor on the coal sample tank, And open the fourth pneumatic valve again, open the high-pressure helium cylinder, the high-pressure helium gas enters the high-pressure pipe of the low-temperature adsorption unit after being decompressed by the second gas pressure reducing valve, and after the fourth pressure sensor shows a stable value, close the fourth pneumatic cylinder. Valve, so as to obtain the free space volume of the sixth to tenth coal sample tanks, close all pneumatic valves and interfaces;
（4）打开第一接口、第三接口和第五接口，打开第一气动阀、第三气动阀、第四气动阀和第六气动阀，启动真空泵对高温吸附单元和低温吸附单元进行脱气处理，直到真空计压力显示20Pa以下并保持三个小时以上，然后关闭真空泵和所有气动阀及接口，开启高压甲烷气瓶，高压甲烷气经第一气体减压阀减压处理后再经高压气体增压泵增压到试验前由试验人员确定的预定吸附压力值储存在甲烷储气罐内，打开第一接口和第四接口，打开第一气动阀和第二气动阀，将预定吸附压力值的甲烷气体充入第一气体缓冲罐及其连接的高压管内，待第一压力传感器和第二压力传感器的示数稳定后，关闭第一气动阀和第二气动阀，然后记录下此时第一压力传感器的示数，依次打开第一至第五煤样罐上的第三气动阀，每次打开一个第三气动阀后待相应煤样罐上的第三压力传感器示数与第一压力传感器的示数相对稳定后，关闭该煤样罐上的第三气动阀，并记录此时该煤样罐上的第三压力传感器的示数并关闭该第三气动阀，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第三压力传感器的示数，并且打开第二气动阀，待第一压力传感器和第二压力传感器的示数稳定后，关闭第二气动阀，从而分别计算出充入第一至第五煤样罐内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第一至第五煤样罐内吸附甲烷气体体积；关闭第一接口，打开第五接口，打开第四气动阀和第五气动阀，将预定吸附压力值的甲烷气体充入第二气体缓冲罐及其连接的高压管内，待第四压力传感器和第五压力传感器的示数稳定后，关闭第四气动阀和第五气动阀，然后记录下此时第四压力传感器的示数，依次打开第六至第十煤样罐上的第六气动阀，每次打开一个第六气动阀后待相应煤样罐上的第六压力传感器示数与第四压力传感器的示数相对稳定后，关闭该煤样罐上的第六气动阀，并记录此时该煤样罐上的第六压力传感器的示数并关闭该第六气动阀，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第六压力传感器的示数，并且打开第五气动阀，待第四压力传感器和第六压力传感器的示数稳定后，关闭第五气动阀，从而分别计算出充入第六至第十煤样罐内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第六至第十煤样罐内吸附甲烷气体体积，关闭所有气动阀和接口；(4) Open the first interface, the third interface and the fifth interface, open the first pneumatic valve, the third pneumatic valve, the fourth pneumatic valve and the sixth pneumatic valve, start the vacuum pump to degas the high temperature adsorption unit and the low temperature adsorption unit Process until the pressure of the vacuum gauge shows below 20Pa and keep it for more than three hours, then close the vacuum pump and all pneumatic valves and interfaces, open the high-pressure methane cylinder, and the high-pressure methane gas is decompressed by the first gas pressure reducing valve and then passed through the high-pressure gas The booster pump is pressurized to the predetermined adsorption pressure value determined by the test personnel before the test and stored in the methane gas storage tank, the first interface and the fourth interface are opened, the first pneumatic valve and the second pneumatic valve are opened, and the predetermined adsorption pressure value is Fill the first gas buffer tank and its connected high-pressure pipe with methane gas. After the readings of the first pressure sensor and the second pressure sensor are stable, close the first pneumatic valve and the second pneumatic valve, and then record the first and second pneumatic valves at this time. A pressure sensor reading, open the third pneumatic valve on the first to fifth coal sample tanks in turn, each time after opening a third pneumatic valve, wait for the third pressure sensor reading on the corresponding coal sample tank to match the first pressure After the reading of the sensor is relatively stable, close the third pneumatic valve on the coal sample tank, and record the reading of the third pressure sensor on the coal sample tank at this time and close the third pneumatic valve for seven hours. Make the coal sample fully adsorb to reach equilibrium, record the reading of the third pressure sensor on the coal sample tank at this time, and open the second pneumatic valve, and close the first pressure sensor and the second pressure sensor after the readings of the first pressure sensor and the second pressure sensor are stable. Two pneumatic valves, so as to calculate the volume of methane gas charged into the first to fifth coal sample tanks and the volume of methane gas in the free state, and finally obtain the volume of adsorbed methane gas in the first to fifth coal sample tanks; close the first to fifth coal sample tanks One interface, open the fifth interface, open the fourth pneumatic valve and the fifth pneumatic valve, fill the methane gas with the predetermined adsorption pressure value into the second gas buffer tank and the high-pressure pipe connected to it, wait for the fourth pressure sensor and the fifth pressure After the readings of the sensors are stable, close the fourth pneumatic valve and the fifth pneumatic valve, then record the readings of the fourth pressure sensor at this time, and open the sixth pneumatic valves on the sixth to tenth coal sample tanks in turn, each time After opening a sixth pneumatic valve and waiting for the readings of the sixth pressure sensor on the corresponding coal sample tank and the readings of the fourth pressure sensor to be relatively stable, close the sixth pneumatic valve on the coal sample tank, and record the coal sample at this time. The reading of the sixth pressure sensor on the sample tank and close the sixth pneumatic valve, keep for seven hours, so that the coal sample is fully adsorbed to reach equilibrium, record the reading of the sixth pressure sensor on the coal sample tank at this time, and Open the fifth pneumatic valve, and close the fifth pneumatic valve after the readings of the fourth pressure sensor and the sixth pressure sensor are stable, so as to calculate the volume and free state of methane gas filled in the sixth to tenth coal sample tanks respectively The volume of methane gas under the pressure, finally get the volume of adsorbed methane gas in the sixth to tenth coal sample tanks, and close all pneumatic valves and interfaces;
（5）步骤（3）和步骤（4）为吸附甲烷气体体积测量方法，使用该方法测量吸附甲烷气体体积前，由试验人员确定该方法中高温吸附单元和低温吸附单元中第一气体缓冲罐和第二气体缓冲罐的Ｎ个预定吸附压力值，N为小于10的正整数，使用吸附甲烷气体体积测量方法进行N次步骤（3）和步骤（4），在最低的预定吸附压力值条件下，采用所述吸附甲烷气体体积测量方法进行操作，得到第一至第十煤样罐内吸附的甲烷气体体积，然后通过高压气体增压泵将第一气体缓冲罐和第二气体缓冲罐的压力值增高到下一预定吸附压力值；在下一预定吸附压力值的条件下重得进行步骤（3）和步骤（4），直到Ｎ次步骤（3）和步骤（4）的操作完成后，得到N个预定吸附压力值下的第一至第十煤样罐内吸附的甲烷气体体积；(5) Steps (3) and (4) are methods for measuring the volume of adsorbed methane gas. Before using this method to measure the volume of adsorbed methane gas, the tester shall determine the first gas buffer tank in the high-temperature adsorption unit and the low-temperature adsorption unit in this method. and N predetermined adsorption pressure values of the second gas buffer tank, where N is a positive integer less than 10, use the method of measuring the volume of adsorbed methane gas to carry out N times of steps (3) and (4), under the condition of the lowest predetermined adsorption pressure value Next, the method for measuring the volume of adsorbed methane gas is used to obtain the volume of methane gas adsorbed in the first to tenth coal sample tanks, and then the volume of the first gas buffer tank and the second gas buffer tank is transferred by a high-pressure gas booster pump. The pressure value is increased to the next predetermined adsorption pressure value; under the condition of the next predetermined adsorption pressure value, step (3) and step (4) are repeated until N times of operation of step (3) and step (4) are completed, Obtain the volume of methane gas adsorbed in the first to tenth coal sample tanks under N predetermined adsorption pressure values;
（6）打开第一接口、第三接口和第五接口，打开第一气动阀、第三气动阀、第四气动阀和第六气动阀，启动真空泵对高温吸附单元和低温吸附单元进行脱气处理，直到真空计压力显示20Pa以下并保持三个小时以上，然后关闭真空泵和所有气动阀及接口，开启高压甲烷气瓶，高压甲烷气经第一气体减压阀减压处理后再经高压气体增压泵增压到试验前由试验人员确定的预定解吸压力值储存在甲烷储气罐内，打开第一接口和第四接口，打开第一气动阀和第二气动阀，将预定解吸压力值的甲烷气体充入第一气体缓冲罐及其连接的高压管内，待第一压力传感器和第二压力传感器的示数稳定后，关闭第一气动阀和第二气动阀，然后记录下此时第一压力传感器的示数，依次打开第一至第五煤样罐上的第三气动阀，每次打开一个第三气动阀后待相应煤样罐上的第三压力传感器示数与第一压力传感器的示数相对稳定后，关闭该煤样罐上的第三气动阀，并记录此时该煤样罐上的第三压力传感器的示数并关闭该第三气动阀，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第三压力传感器的示数，并且打开第二气动阀，待第一压力传感器和第二压力传感器的示数稳定后，关闭第二气动阀，从而分别计算出充入第一至第五煤样罐内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第一至第五煤样罐内吸附甲烷气体体积；关闭第一接口，打开第五接口，打开第四气动阀和第五气动阀，将预定解吸压力值的甲烷气体充入第二气体缓冲罐及其连接的高压管内，待第四压力传感器和第五压力传感器的示数稳定后，关闭第四气动阀和第五气动阀，然后记录下此时第四压力传感器的示数，依次打开第六至第十煤样罐上的第六气动阀，每次打开一个第六气动阀后待相应煤样罐上的第六压力传感器示数与第四压力传感器的示数相对稳定后，关闭该煤样罐上的第六气动阀，并记录此时该煤样罐上的第六压力传感器的示数并关闭该第六气动阀，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第六压力传感器的示数，并且打开第五气动阀，待第四压力传感器和第六压力传感器的示数稳定后，关闭第五气动阀，从而分别计算出充入第六至第十煤样罐内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第六至第十煤样罐内吸附甲烷气体体积，关闭所有气动阀和接口，煤样达到吸附平衡后，打开第六接口、第七接口、第八接口、第十接口和第九气动阀，依次打开第一至第五煤样罐上的第三气动阀，分别对第一至第五煤样罐内游离状态下的甲烷气体进行排空，每次打开一个第三气动阀后待相应煤样罐上的第三压力传感器示数为零时，关闭第九气动阀，采用计算机自动控制第一解吸气体流量计、第二解吸气体流量计、第三解吸气体流量计上的第七气动阀以及第八气动阀，首先选取第一解吸气体流量计，当甲烷气体流量大于450ml/min时，计算机控制将第一解吸气体流量计上的第七气动阀打开，通过第一解吸气体流量计测得解吸出的甲烷气体体积，当甲烷气体流量在80ml/min-450ml/min之间时，计算机将第二解吸气体流量计上的第七气动阀打开，通过第二解吸气体流量计测得解吸出的甲烷气体体积，当甲烷气体流量在20ml/min-80ml/min之间时，计算机将第三解吸气体流量计上的第七气动阀打开，通过第三解吸气体流量计测得解吸出的甲烷气体体积，当甲烷气体流量小于20ml/min，计算机将第八气动阀打开，通过气排水计量装置测得解吸出的甲烷气体体积，从而测得第一至第五煤样罐内解吸出的甲烷气体体积；然后关闭第八接口，打开第九接口和第九气动阀，依次打开第六至第十煤样罐上的第六气动阀，分别对第六至第十煤样罐内游离状态下的甲烷气体进行排空，每次打开一个第六气动阀后待相应煤样罐上的第六压力传感器示数为零时，关闭第九气动阀，采用计算机自动控制第一解吸气体流量计、第二解吸气体流量计、第三解吸气体流量计上的第七气动阀以及第八气动阀，通过第一解吸气体流量计、第二解吸气体流量计、第三解吸气体流量计和气排水计量装置，测得第六至第十煤样罐内解吸出的甲烷气体体积，整个解吸过程中计算机实时采集瞬时流量和累积流量，并生成数据报表及曲线；(6) Open the first interface, the third interface and the fifth interface, open the first pneumatic valve, the third pneumatic valve, the fourth pneumatic valve and the sixth pneumatic valve, start the vacuum pump to degas the high temperature adsorption unit and the low temperature adsorption unit Process until the pressure of the vacuum gauge shows below 20Pa and keep it for more than three hours, then close the vacuum pump and all pneumatic valves and interfaces, open the high-pressure methane cylinder, and the high-pressure methane gas is decompressed by the first gas pressure reducing valve and then passed through the high-pressure gas The booster pump is pressurized to the predetermined desorption pressure value determined by the test personnel before the test and stored in the methane gas storage tank, the first port and the fourth port are opened, the first pneumatic valve and the second pneumatic valve are opened, and the predetermined desorption pressure value is Fill the first gas buffer tank and its connected high-pressure pipe with methane gas. After the readings of the first pressure sensor and the second pressure sensor are stable, close the first pneumatic valve and the second pneumatic valve, and then record the first and second pneumatic valves at this time. A pressure sensor reading, open the third pneumatic valve on the first to fifth coal sample tanks in turn, each time after opening a third pneumatic valve, wait for the third pressure sensor reading on the corresponding coal sample tank to match the first pressure After the reading of the sensor is relatively stable, close the third pneumatic valve on the coal sample tank, and record the reading of the third pressure sensor on the coal sample tank at this time and close the third pneumatic valve for seven hours. Make the coal sample fully adsorb to reach equilibrium, record the reading of the third pressure sensor on the coal sample tank at this time, and open the second pneumatic valve, and close the first pressure sensor and the second pressure sensor after the readings of the first pressure sensor and the second pressure sensor are stable. Two pneumatic valves, so as to calculate the volume of methane gas charged into the first to fifth coal sample tanks and the volume of methane gas in the free state, and finally obtain the volume of adsorbed methane gas in the first to fifth coal sample tanks; close the first to fifth coal sample tanks One interface, open the fifth interface, open the fourth pneumatic valve and the fifth pneumatic valve, fill the methane gas with the predetermined desorption pressure value into the second gas buffer tank and the high-pressure pipe connected to it, wait for the fourth pressure sensor and the fifth pressure After the readings of the sensors are stable, close the fourth pneumatic valve and the fifth pneumatic valve, then record the readings of the fourth pressure sensor at this time, and open the sixth pneumatic valves on the sixth to tenth coal sample tanks in turn, each time After opening a sixth pneumatic valve and waiting for the readings of the sixth pressure sensor on the corresponding coal sample tank and the readings of the fourth pressure sensor to be relatively stable, close the sixth pneumatic valve on the coal sample tank, and record the coal sample at this time. The reading of the sixth pressure sensor on the sample tank and close the sixth pneumatic valve, keep for seven hours, so that the coal sample is fully adsorbed to reach equilibrium, record the reading of the sixth pressure sensor on the coal sample tank at this time, and Open the fifth pneumatic valve, and close the fifth pneumatic valve after the readings of the fourth pressure sensor and the sixth pressure sensor are stable, so as to calculate the volume and free state of methane gas filled in the sixth to tenth coal sample tanks respectively Finally, the methane gas volume of the sixth to tenth coal sample tanks is obtained. Close all pneumatic valves and ports. After the coal sample reaches the adsorption equilibrium, open the sixth port, the seventh port, the eighth port, the The tenth interface and the ninth pneumatic valve open the third pneumatic valve on the first to fifth coal sample tanks in turn, and respectively control the free state in the first to fifth coal sample tanks. When the third pressure sensor on the corresponding coal sample tank reads zero after opening the third pneumatic valve each time, close the ninth pneumatic valve and use the computer to automatically control the first desorption gas flowmeter , the second desorption gas flowmeter, the seventh pneumatic valve and the eighth pneumatic valve on the third desorption gas flowmeter, first select the first desorption gas flowmeter, when the methane gas flow rate is greater than 450ml/min, the computer control will first The seventh pneumatic valve on the desorption gas flowmeter is opened, and the desorbed methane gas volume is measured by the first desorption gas flowmeter. The seventh pneumatic valve on the flowmeter is opened, and the volume of methane gas desorbed is measured by the second desorption gas flowmeter. When the flow rate of methane gas is between 20ml/min-80ml/min, the computer sets The seventh pneumatic valve on the top is opened, and the desorbed methane gas volume is measured by the third desorption gas flow meter. When the methane gas flow rate is less than 20ml/min, the computer opens the eighth pneumatic valve, and the desorbed gas volume is measured by the gas drainage metering device. to measure the volume of methane gas desorbed in the first to fifth coal sample tanks; then close the eighth interface, open the ninth interface and the ninth pneumatic valve, and open the sixth to tenth coal sample tanks in turn The sixth pneumatic valve on the top is used to empty the methane gas in the free state in the sixth to tenth coal sample tanks, and each time a sixth pneumatic valve is opened, wait for the sixth pressure sensor on the corresponding coal sample tank to read When it is zero, close the ninth pneumatic valve, use the computer to automatically control the seventh pneumatic valve and the eighth pneumatic valve on the first desorption gas flow meter, the second desorption gas flow meter, and the third desorption gas flow meter, and pass the first desorption gas flow meter. The gas flow meter, the second desorption gas flow meter, the third desorption gas flow meter, and the gas drainage metering device measure the volume of methane gas desorbed in the sixth to tenth coal sample tanks. During the whole desorption process, the computer collects the instantaneous flow rate and Accumulate traffic and generate data reports and curves;
（7）步骤（6）为解吸甲烷气体体积测量方法，使用该方法测量解吸甲烷气体体积前，由试验人员确定该方法中高温吸附单元和低温吸附单元中第一气体缓冲罐和第二气体缓冲罐的Ｎ个预定解吸压力值，N为小于10的正整数，使用解吸甲烷气体体积测量方法进行N次步骤（6），在最低的预定解吸压力值条件下，采用所述解吸甲烷气体体积测量方法进行操作，得到第一至第十煤样罐内解吸出的甲烷气体体积，然后通过高压气体增压泵将第一气体缓冲罐和第二气体缓冲罐的压力值增高到下一预定解吸压力值；在下一预定解吸压力值的条件下重得进行步骤（6），直到Ｎ次步骤（6）的操作完成后，得到N个预定解吸压力值下的第一至第十煤样罐内吸附的甲烷气体体积。(7) Step (6) is a method for measuring the volume of desorbed methane gas. Before using this method to measure the volume of desorbed methane gas, the tester shall determine the first gas buffer tank and the second gas buffer tank in the high-temperature adsorption unit and the low-temperature adsorption unit in this method. N predetermined desorption pressure values of the tank, where N is a positive integer less than 10, use the desorption methane gas volume measurement method to carry out N times of step (6), under the condition of the lowest predetermined desorption pressure value, use the desorption methane gas volume measurement method The method is to operate to obtain the volume of methane gas desorbed in the first to tenth coal sample tanks, and then increase the pressure values of the first gas buffer tank and the second gas buffer tank to the next predetermined desorption pressure through a high-pressure gas booster pump value; repeat step (6) under the condition of the next predetermined desorption pressure value, until the operation of step (6) is completed for N times, and the first to tenth coal samples adsorbed in the tank under N predetermined desorption pressure values are obtained volume of methane gas.
采用上述技术方案，本发明具有如下优点：Adopt above-mentioned technical scheme, the present invention has following advantage:
1、本发明的高低温高压吸附解吸试验装置包括充气系统、脱气系统、吸附系统、解吸系统、温度控制系统和数据采集系统，充气系统包括甲烷充气单元和氦气充气单元，甲烷充气单元利用高压甲烷气瓶先通过第一气体减压阀减压，再经高压气体增压泵将甲烷气体压力调节到试验所需的压力，并将设定好压力值的甲烷气体充入到甲烷储气罐内，由甲烷储气罐向吸附系统中提供预定压力值的甲烷气体，氦气充气单元利用高压氦气瓶经第二气体减压阀减压处理后通入吸附系统中，用于标定各个煤样罐的自由空间体积；脱气系统采用真空泵对吸附系统进行脱气处理，确保试验过程中只有甲烷气体参与到试验中，从而排除其他气体对试验结果的干扰；温度控制系统利用高温单元结合吸附系统内的高温吸附单元模拟高温环境下的甲烷吸附解吸试验，并利用低温单元结合吸附系统内的低温吸附单元模拟低温环境下的甲烷吸附解吸试验；1. The high-low temperature and high-pressure adsorption and desorption test device of the present invention comprises an air charging system, a degassing system, an adsorption system, a desorption system, a temperature control system and a data acquisition system. The air charging system includes a methane charging unit and a helium charging unit, and the methane charging unit utilizes The high-pressure methane gas cylinder is first decompressed through the first gas pressure reducing valve, and then the pressure of the methane gas is adjusted to the pressure required for the test through the high-pressure gas booster pump, and the methane gas with the set pressure value is charged into the methane gas storage In the tank, the methane gas storage tank provides methane gas with a predetermined pressure value to the adsorption system, and the helium gas charging unit uses a high-pressure helium cylinder to be decompressed by the second gas pressure reducing valve and then passed into the adsorption system to calibrate each The free space volume of the coal sample tank; the degassing system uses a vacuum pump to degas the adsorption system to ensure that only methane gas participates in the test during the test, thereby eliminating the interference of other gases on the test results; the temperature control system uses a high temperature unit combined with The high temperature adsorption unit in the adsorption system simulates the methane adsorption and desorption test in a high temperature environment, and uses the low temperature unit combined with the low temperature adsorption unit in the adsorption system to simulate the methane adsorption and desorption test in a low temperature environment;
2、本发明的解吸系统采用三个不同量程的解吸气体流量计以及气排水计量装置，在解吸试验初期采用第一解吸气体流量计进行计量，随着解吸气体的流量降低，依次采用第二解吸气体流量计、第三解吸气体流量计以及气排水计量装置进行计量，在整个解吸试验过程中，通过计算机根据解吸气体流量的大小自动控制接口切换，并且实时自动采集数据，有效地提高了试验精度，并且降低了操作难度，试验操作简便，有效提高试验效率；2. The desorption system of the present invention adopts three different ranges of desorption gas flowmeters and gas drainage metering devices. In the initial stage of the desorption test, the first desorption gas flowmeter is used for measurement. The gas flow meter, the third desorption gas flow meter and the gas drainage metering device are used for measurement. During the whole desorption test process, the computer automatically controls the interface switching according to the desorption gas flow rate, and automatically collects data in real time, which effectively improves the test accuracy. , and reduce the difficulty of operation, the test operation is simple, and the test efficiency is effectively improved;
3、本发明的高低温高压吸附解吸试验装置采用低温单元可提供-100℃的低温环境，为研究甲烷在低温环境下的吸附解吸特性和模拟甲烷的超临界吸附提供了试验条件；3. The high-low temperature and high-pressure adsorption and desorption test device of the present invention adopts a low-temperature unit to provide a low-temperature environment of -100°C, which provides test conditions for studying the adsorption and desorption characteristics of methane in a low-temperature environment and simulating the supercritical adsorption of methane;
4、本发明的高低温高压吸附解吸试验装置的试验方法，在试验过程中的数据采集和接口控制均有计算机控制，仪器工作流程显示在界面上，操作人员设定好参数后，计算机可以自动采集所有压力、温度、流量，并经处理生成原始数据报表、分析表以及曲线图，有效避免了人工读数和人工记录带来的试验误差，提升了试验的准确性和试验效率，降低了试验人员的操作难度；4. In the test method of the high-low temperature and high-pressure adsorption-desorption test device of the present invention, the data acquisition and interface control in the test process are controlled by a computer, and the instrument work flow is displayed on the interface. After the operator sets the parameters, the computer can automatically Collect all pressure, temperature, and flow, and generate raw data reports, analysis tables, and graphs after processing, effectively avoiding the test errors caused by manual readings and manual records, improving the accuracy and efficiency of the test, and reducing the number of test personnel. difficulty of operation;
5、本发明的高低温高压吸附解吸试验装置的试验方法，可同时进行五组煤样的不同温度、不同压力下条件下的甲烷气体吸附量和甲烷气体解吸量的测定，有效提高了试验效率，并且分别模拟高温条件和低温条件不同压力下的甲烷吸附解吸试验，为研究煤体瓦斯吸附解吸规律尤其是低温环境下煤体瓦斯吸附解吸特性提供了更加可靠的数据基础，对瓦斯的高效抽采及利用具有重要的现实意义。5. The test method of the high-low temperature and high-pressure adsorption and desorption test device of the present invention can simultaneously measure the methane gas adsorption and methane gas desorption of five groups of coal samples at different temperatures and pressures, effectively improving the test efficiency , and simulated methane adsorption and desorption experiments under different pressures under high temperature and low temperature conditions, it provides a more reliable data basis for studying the law of coal gas adsorption and desorption, especially the characteristics of coal gas adsorption and desorption under low temperature environment It is of great practical significance to collect and utilize them.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
具体实施方式detailed description
如图1所示，本发明的高低温高压吸附解吸试验装置，包括充气系统、脱气系统、吸附系统、解吸系统、温度控制系统和数据采集系统。As shown in Figure 1, the high-low temperature and high-pressure adsorption-desorption test device of the present invention includes an air charging system, a degassing system, an adsorption system, a desorption system, a temperature control system and a data acquisition system.
充气系统包括甲烷充气单元和氦气充气单元，甲烷充气单元包括高压甲烷气瓶1、甲烷储气罐2和第一五通阀，高压甲烷气瓶1和甲烷储气罐2之间通过高压管3连通，高压甲烷气瓶1和甲烷储气罐2之间的高压管3上沿甲烷气体流通方向依次串联设有第一气体减压阀4和高压气体增压泵5，第一五通阀包括第一阀体6，第一阀体6上设有第一接口7、第二接口8、第三接口9、第四接口10和第五接口11，第一阀体6上设有与第一至第五接口7、8、9、10、11相对应的五个接口开关（五通阀为现有常规部件，其具体结构不再详述），甲烷储气罐2通过高压管3与第四接口10连接；氦气充气单元包括高压氦气瓶12和第二气体减压阀13，高压氦气瓶12通过高压管3与第二接口8连接，第二气体减压阀13设置在高压氦气瓶12与第二接口8之间的高压管3上。The charging system includes a methane charging unit and a helium charging unit. The methane charging unit includes a high-pressure methane gas cylinder 1, a methane gas storage tank 2 and the first five-way valve. 3 connected, the high-pressure pipe 3 between the high-pressure methane gas cylinder 1 and the methane gas storage tank 2 is sequentially provided with a first gas pressure reducing valve 4 and a high-pressure gas booster pump 5 in series along the flow direction of methane gas, and the first five-way valve Including the first valve body 6, the first valve body 6 is provided with a first port 7, a second port 8, a third port 9, a fourth port 10 and a fifth port 11, and the first valve body 6 is provided with a The five interface switches corresponding to the first to fifth interfaces 7, 8, 9, 10, and 11 (the five-way valve is an existing conventional component, and its specific structure will not be described in detail), the methane gas storage tank 2 is connected with the high-pressure pipe 3 The fourth interface 10 is connected; the helium gas charging unit includes a high-pressure helium cylinder 12 and a second gas decompression valve 13, the high-pressure helium cylinder 12 is connected with the second interface 8 through a high-pressure pipe 3, and the second gas decompression valve 13 is arranged on On the high-pressure pipe 3 between the high-pressure helium cylinder 12 and the second interface 8 .
脱气系统包括真空泵14、真空容器15、真空计16和第二五通阀，第二五通阀包括第二阀体17，第二阀体17上设有第六接口18、第七接口19、第八接口20、第九接口21和第十接口22，第二阀体17上设有与第六至第十接口18、19、20、21、22相对应的五个接口开关，The degassing system includes a vacuum pump 14, a vacuum container 15, a vacuum gauge 16 and a second five-way valve, the second five-way valve includes a second valve body 17, and the second valve body 17 is provided with a sixth port 18 and a seventh port 19 , the eighth interface 20, the ninth interface 21 and the tenth interface 22, the second valve body 17 is provided with five interface switches corresponding to the sixth to tenth interfaces 18, 19, 20, 21, 22,
真空泵14通过高压管3与真空容器15连接，真空计16设在真空容器15上，真空容器15通过高压管3与第三接口9连接，第一五通阀的第一接口7与第二五通阀的第八接口20通过高压管3连接，第一五通阀的第五接口11与第二五通阀的第九接口21通过高压管3连接。The vacuum pump 14 is connected to the vacuum container 15 through the high-pressure pipe 3, the vacuum gauge 16 is arranged on the vacuum container 15, the vacuum container 15 is connected to the third port 9 through the high-pressure pipe 3, and the first port 7 of the first five-way valve is connected to the second five-way valve. The eighth port 20 of the one-way valve is connected through the high-pressure pipe 3 , and the fifth port 11 of the first five-way valve is connected with the ninth port 21 of the second five-way valve through the high-pressure pipe 3 .
温度控制系统包括高温单元和低温单元，高温单元包括高温恒温箱23和设在高温恒温箱23上的第一控制面板24，第一控制面板24上设有第一温控仪25、第一电源开关26、加热开关27、指示灯开关28和由加热开关27控制的加热器；低温单元包括低温恒温箱29和设在低温恒温箱29上的第二控制面板30，第二控制面板30上设有第二温控仪31、第二电源开关32、制冷开关33和由制冷开关33控制的制冷单元；高温单元和低温单元中各部分均为现有常规技术，图未示加热器和制冷单元。高温恒温箱23的温度设置范围为20℃至80℃，高温恒温箱23正面设计有带观察窗的旋式单开门，工作室内装有射线灯，箱体外表面喷塑，内表面采用不锈钢材料，循环方式为热风对流循环，并使用第一温控仪25调节温度，为试验提供所需的恒温环境；低温恒温箱29采用三级自动复叠循环制冷机组制冷，可提供-100℃至20℃的试验环境，箱体外表面喷塑，内表面采用不锈钢材料，内四壁设有制冷蒸发器，内部阶梯支架用于放置低温吸附室，采用卧式结构确保超低温状态温度保持恒定。The temperature control system includes a high-temperature unit and a low-temperature unit. The high-temperature unit includes a high-temperature thermostat box 23 and a first control panel 24 arranged on the high-temperature thermostat box 23. The first control panel 24 is provided with a first temperature controller 25 and a first power supply. Switch 26, heating switch 27, pilot lamp switch 28 and the heater controlled by heating switch 27; There is a second temperature controller 31, a second power switch 32, a refrigeration switch 33 and a refrigeration unit controlled by the refrigeration switch 33; each part in the high-temperature unit and the low-temperature unit is an existing conventional technology, and the heater and the refrigeration unit are not shown in the figure . The temperature setting range of the high temperature constant temperature box 23 is 20°C to 80°C. The front of the high temperature constant temperature box 23 is designed with a rotary single door with an observation window. The working room is equipped with a ray lamp. The outer surface of the box is sprayed with plastic, and the inner surface is made of stainless steel. , the circulation mode is hot air convection circulation, and the first temperature controller 25 is used to adjust the temperature to provide the required constant temperature environment for the test; the low-temperature constant temperature box 29 is refrigerated by a three-stage automatic cascade cycle refrigeration unit, which can provide -100 ° C to 20 In the test environment of ℃, the outer surface of the box is sprayed with plastic, the inner surface is made of stainless steel, the inner four walls are equipped with refrigeration evaporators, and the inner ladder bracket is used to place the low-temperature adsorption chamber.
吸附系统包括高温吸附单元和低温吸附单元，高温吸附单元包括设置在高温恒温箱23内的第一气体缓冲罐34和若干煤样罐，第一气体缓冲罐34和每个煤样罐分别通过连接管83并联设置在第一接口7与第八接口20之间的高压管3上，第一接口7与第八接口20之间的高压管3上沿气体流通方向依次串联设有第一气动阀35和第一压力传感器36，第一气体缓冲罐34上设有第一温度传感器37和第二压力传感器38，第一气体缓冲罐34上连接的连接管83上设有第二气动阀39，每个煤样罐上分别设有第二温度传感器40和第三压力传感器41，每个煤样罐上连接的连接管83上分别设有第三气动阀42。The adsorption system includes a high-temperature adsorption unit and a low-temperature adsorption unit. The high-temperature adsorption unit includes a first gas buffer tank 34 and several coal sample tanks arranged in the high-temperature constant temperature box 23. The first gas buffer tank 34 and each coal sample tank are respectively connected by The pipe 83 is arranged in parallel on the high-pressure pipe 3 between the first port 7 and the eighth port 20, and the first pneumatic valve is arranged in series on the high-pressure pipe 3 between the first port 7 and the eighth port 20 along the gas flow direction. 35 and the first pressure sensor 36, the first gas buffer tank 34 is provided with the first temperature sensor 37 and the second pressure sensor 38, the connecting pipe 83 connected on the first gas buffer tank 34 is provided with the second pneumatic valve 39, Each coal sample tank is respectively provided with a second temperature sensor 40 and a third pressure sensor 41 , and the connecting pipe 83 connected to each coal sample tank is respectively provided with a third pneumatic valve 42 .
低温吸附单元包括设置在低温恒温箱29内的第二气体缓冲罐43和若干煤样罐，第二气体缓冲罐43和每个煤样罐分别通过连接管83并联设置在第五接口11和第九接口21之间的高压管3上，第五接口11与第九接口21之间的高压管3上沿气体流通方向依次串联设有第四气动阀44和第四压力传感器45，第二气体缓冲罐43上设有第三温度传感器46和第五压力传感器47，第二气体缓冲罐43上连接的连接管83上设有第五气动阀48，每个煤样罐上分别设有第四温度传感器49和第六压力传感器50，每个煤样罐上连接的连接管83上分别设有第六气动阀51。The low-temperature adsorption unit includes a second gas buffer tank 43 and several coal sample tanks arranged in the low-temperature thermostat 29, and the second gas buffer tank 43 and each coal sample tank are arranged in parallel at the fifth interface 11 and the second gas sample tank through connecting pipes 83 respectively. On the high-pressure pipe 3 between the nine ports 21, on the high-pressure pipe 3 between the fifth port 11 and the ninth port 21, a fourth pneumatic valve 44 and a fourth pressure sensor 45 are arranged in series along the direction of gas flow, and the second gas The buffer tank 43 is provided with a third temperature sensor 46 and a fifth pressure sensor 47, the connecting pipe 83 connected to the second gas buffer tank 43 is provided with a fifth pneumatic valve 48, and each coal sample tank is respectively provided with a fourth The temperature sensor 49 and the sixth pressure sensor 50 are respectively provided with a sixth pneumatic valve 51 on the connecting pipe 83 connected to each coal sample tank.
解吸系统包括气排水计量装置、电子天平52和若干并联在一起的解吸气体流量计，各解吸气体流量计的量程互不相同，每个解吸气体流量计分别通过高压管3与第七接口19连接，每个解吸气体流量计与第七接口19之间的高压管3上分别设有第七气动阀53。The desorption system includes a gas drainage metering device, an electronic balance 52 and several desorption gas flowmeters connected in parallel. The measuring ranges of each desorption gas flowmeter are different from each other, and each desorption gas flowmeter is connected to the seventh interface 19 through a high-pressure pipe 3 respectively. The high-pressure pipe 3 between each desorption gas flow meter and the seventh interface 19 is respectively provided with a seventh pneumatic valve 53 .
气排水计量装置包括储水容器54、排水管55和集水容器56，储水容器54上端通过高压管3与第六接口18连接，储水容器54与第六接口18之间的高压管3上设有第八气动阀57，排水管55一端与储水容器54底部连通，排水管55另一端与集水容器56顶部连通，集水容器56放置在电子天平52上，第十接口22上连接有排空管58，排空管58上设有第九气动阀59。The gas drainage metering device includes a water storage container 54, a drain pipe 55 and a water collection container 56. The upper end of the water storage container 54 is connected to the sixth interface 18 through a high-pressure pipe 3, and the high-pressure pipe 3 between the water storage container 54 and the sixth interface 18 An eighth pneumatic valve 57 is provided on the top, one end of the drain pipe 55 communicates with the bottom of the water storage container 54, and the other end of the drain pipe 55 communicates with the top of the water collection container 56, the water collection container 56 is placed on the electronic balance 52, and the tenth interface 22 An emptying pipe 58 is connected, and a ninth pneumatic valve 59 is arranged on the emptying pipe 58 .
数据采集系统包括计算机60和控制单元，控制单元包括第三控制面板61，第三控制面板61上设有压力巡检仪62、温度巡检仪63、流量计显示器、用于控制第二电源开关32的低温恒温箱开关64、用于控制第一电源开关26的高温恒温箱开关65，以及用于控制压力巡检仪62和温度巡检仪63的第三电源开关66，计算机控制连接第一气体减压阀4、第二气体减压阀13、第一五通阀、第二五通阀及第一至第九气动阀35、39、42、44、48、51、53、57、59。计算机60采用DelPhi编程，具有气体参数转化、数据分析功能，仪器工作流程显示在界面上，可实现人机对话，操作人员设定好参数后，计算机可以自动采集所有压力、温度、流量，并经处理生成原始数据报表、分析报表以及曲线图。Data acquisition system comprises computer 60 and control unit, and control unit comprises the 3rd control panel 61, is provided with pressure patrol instrument 62, temperature patrol instrument 63, flowmeter display, is used to control the second power switch on the 3rd control panel 61. 32 low temperature thermostat switch 64, the high temperature thermostat switch 65 for controlling the first power switch 26, and the third power switch 66 for controlling the pressure patrol instrument 62 and the temperature patrol instrument 63, and the computer control connects the first Gas pressure reducing valve 4, second gas pressure reducing valve 13, first five-way valve, second five-way valve and first to ninth pneumatic valves 35, 39, 42, 44, 48, 51, 53, 57, 59 . The computer 60 adopts DelPhi programming, which has the functions of gas parameter conversion and data analysis. The working process of the instrument is displayed on the interface, which can realize man-machine dialogue. Process and generate raw data reports, analysis reports and graphs.
高压甲烷气瓶1内充入的甲烷气体为市售甲烷标准气，体积为40L/瓶，纯度≥99.99%,高压氦气瓶12内充入的氦气为市售标准氦气，压力为15MPa，体积为40L/瓶，高压管3的耐压值在50MPa以上。The methane gas filled in the high-pressure methane gas cylinder 1 is commercially available methane standard gas with a volume of 40L/bottle and a purity of ≥99.99%. The helium gas filled in the high-pressure helium gas cylinder 12 is commercially available standard helium gas with a pressure of 15MPa , the volume is 40L/bottle, and the pressure resistance value of the high-pressure pipe 3 is above 50MPa.
高温吸附单元内所述煤样罐为五个，分别为第一煤样罐67、第二煤样罐68、第三煤样罐69、第四煤样罐70和第五煤样罐71，低温吸附单元内所述煤样罐为五个，分别为第六煤样罐72、第七煤样罐73、第八煤样罐74、第九煤样罐75和第十煤样罐76。There are five coal sample tanks in the high temperature adsorption unit, namely the first coal sample tank 67, the second coal sample tank 68, the third coal sample tank 69, the fourth coal sample tank 70 and the fifth coal sample tank 71, There are five coal sample tanks in the low temperature adsorption unit, namely the sixth coal sample tank 72 , the seventh coal sample tank 73 , the eighth coal sample tank 74 , the ninth coal sample tank 75 and the tenth coal sample tank 76 .
解吸系统内所述解吸气体流量计为三个，分别为第一解吸气体流量计77、第二解吸气体流量计78和第三解吸气体流量计79，第一解吸气体流量计77的量程为0-2000ml/min，第二解吸气体流量计78的量程为0-500ml/min，第三解吸气体流量计79的量程为0-100ml/min；所述流量计显示器为三个，分别为与第一解吸气体流量计77、第二解吸气体流量计78、第三解吸气体流量计79相对应的第一流量计显示器80、第二流量计显示器81、第三流量计显示器82。There are three desorption gas flow meters in the desorption system, which are respectively the first desorption gas flow meter 77, the second desorption gas flow meter 78 and the third desorption gas flow meter 79, and the range of the first desorption gas flow meter 77 is 0 -2000ml/min, the measuring range of the second desorption gas flow meter 78 is 0-500ml/min, the measuring range of the third desorption gas flow meter 79 is 0-100ml/min; A desorption gas flowmeter 77 , a second desorption gas flowmeter 78 , and a third desorption gas flowmeter 79 correspond to a first flowmeter display 80 , a second flowmeter display 81 , and a third flowmeter display 82 .
其中，真空泵14、真空容器15、真空计16、高压气体增压泵5、气体减压阀、气动阀、五通阀、温度传感器、压力传感器、高温恒温箱23、低温恒温箱29和解吸气体流量计等均为本领域现有常规技术，其具体结构不再详述。Wherein, vacuum pump 14, vacuum container 15, vacuum gauge 16, high-pressure gas booster pump 5, gas decompression valve, pneumatic valve, five-way valve, temperature sensor, pressure sensor, high temperature thermostat 23, low temperature thermostat 29 and desorbing gas The volume flowmeter and the like are existing conventional technologies in the art, and its specific structure will not be described in detail.
高低温高压吸附解吸试验装置的试验方法依次包括以下步骤：The test method of the high-low temperature and high-pressure adsorption-desorption test device includes the following steps in sequence:
（1）在井下采掘工作面上钻取块状新鲜煤样，进行严密封装后送至地面实验室，将新鲜煤样粉碎、筛分成不同的粒度，分别选取相应粒度的煤样进行工业分析、真密度和视密度等参数的测定；(1) Drill massive fresh coal samples on the underground mining face, seal them tightly and send them to the ground laboratory, crush and sieve the fresh coal samples into different particle sizes, and select coal samples with corresponding particle sizes for industrial analysis, Determination of parameters such as true density and apparent density;
（2）检查试验装置确保试验装置连接可靠，打开第二气体减压阀13、第一接口7、第二接口8、第五接口11、第一气动阀35、第二气动阀39、第三气动阀42、第四气动阀44、第五气动阀48和第六气动阀51，将氦气充入第一气体缓冲罐34、第二气体缓冲罐43及第一至第十煤样罐67、68、69、70、71、72、73、74、75、76，检查试验装置的气密性确保试验装置气密性良好，然后关闭所有气体减压阀、气动阀及接口；打开第一接口7、第三接口9和第五接口11，打开第一气动阀35、第二气动阀39、第三气动阀42、第四气动阀44、第五气动阀48和第六气动阀51，启动真空泵14对高温吸附单元和低温吸附单元进行脱气处理，直到真空计16压力显示20Pa以下三个小时以上，然后关闭真空泵14和所有气体减压阀、气动阀及接口，将电子天平52放置在排空管58处，将集水容器56放置在电子天平52上并注入水，将排空管58的出口端伸入到集水容器56水面以下，记录下电子天平52的示数g1，打开第八接口20和第十接口22，打开第九气动阀59，集水容器56内的水流入并填充第一气动阀35与第八接口20之间的高压管3，记录下电子天平52的示数g2，g1与g2的差值所对应的水的体积即为第一气动阀35与第八接口20之间的高压管3的体积，依次打开第二气动阀39和第一至第五煤样罐67、68、69、70、71上的第三气动阀42，每次打开相应气动阀后待电子天平52的示数稳定后，记录此时电子天平52的示数并关闭该气动阀，分别测得流入水的质量，得出第一气体缓冲罐34和第一至第五煤样罐67、68、69、70、71的体积，关闭所有接口及气动阀，然后打开第九接口21和第十接口22，打开第九气动阀59，集水容器56内的水流入并填充第四气动阀44与第九接口21之间的高压管3，记录下电子天平52的示数，计算出第四气动阀44与第九接口21之间的高压管3的体积，然后依次打开第五气动阀48和第六至第十煤样罐72、73、74、75、76上的第六气动阀51，每次打开相应气动阀后待电子天平52的示数稳定后，记录此时电子天平52的示数并关闭该气动阀，分别测得流入水的质量，得出第二气体缓冲罐43和第六至第十煤样罐72、73、74、75、76的体积；(2) Check the test device to ensure that the test device is connected reliably, open the second gas pressure reducing valve 13, the first port 7, the second port 8, the fifth port 11, the first pneumatic valve 35, the second pneumatic valve 39, the third The pneumatic valve 42, the fourth pneumatic valve 44, the fifth pneumatic valve 48 and the sixth pneumatic valve 51 fill helium into the first gas buffer tank 34, the second gas buffer tank 43 and the first to tenth coal sample tanks 67 , 68, 69, 70, 71, 72, 73, 74, 75, 76, check the airtightness of the test device to ensure that the airtightness of the test device is good, then close all gas pressure reducing valves, pneumatic valves and interfaces; open the first Interface 7, third interface 9 and fifth interface 11, open the first pneumatic valve 35, the second pneumatic valve 39, the third pneumatic valve 42, the fourth pneumatic valve 44, the fifth pneumatic valve 48 and the sixth pneumatic valve 51, Start the vacuum pump 14 to degas the high-temperature adsorption unit and the low-temperature adsorption unit until the pressure of the vacuum gauge 16 shows below 20 Pa for more than three hours, then close the vacuum pump 14 and all gas pressure reducing valves, pneumatic valves and interfaces, and place the electronic balance 52 At the emptying pipe 58 place, the water collecting container 56 is placed on the electronic balance 52 and injected with water, the outlet end of the emptying pipe 58 is stretched below the water collecting container 56 water surface, and the indication gof the electronic balance 52 is recorded. , open the eighth interface 20 and the tenth interface 22, open the ninth pneumatic valve 59, the water in the water collection container 56 flows into and fills the high-pressure pipe 3 between the first pneumatic valve 35 and the eighth interface 20, and records the electronic balance The volume of water corresponding to the difference between g2 andg 2of 52 is the volume of the high-pressure pipe 3 between the first pneumatic valve 35 and the eighth interface 20. Open the second pneumatic valve 39 and The third pneumatic valve 42 on the first to fifth coal sample tanks 67, 68, 69, 70, 71, after opening the corresponding pneumatic valve each time, after the indication of the electronic balance 52 is stable, record the indication of the electronic balance 52 at this time. Count and close the pneumatic valve, respectively measure the quality of the inflow water, obtain the volume of the first gas buffer tank 34 and the first to fifth coal sample tanks 67, 68, 69, 70, 71, close all interfaces and pneumatic valves , then open the ninth interface 21 and the tenth interface 22, open the ninth pneumatic valve 59, the water in the water collection container 56 flows into and fills the high-pressure pipe 3 between the fourth pneumatic valve 44 and the ninth interface 21, and records the electronic The indication of the balance 52 calculates the volume of the high-pressure pipe 3 between the fourth pneumatic valve 44 and the ninth interface 21, and then opens the fifth pneumatic valve 48 and the sixth to tenth coal sample tanks 72, 73, 74, For the sixth pneumatic valve 51 on 75 and 76, after opening the corresponding pneumatic valve each time, after the indication of the electronic balance 52 is stable, record the indication of the electronic balance 52 at this time and close the pneumatic valve to measure the quality of the inflow water respectively , draw the volume of the second gas buffer tank 43 and the sixth to tenth coal sample tanks 72, 73, 74, 75, 76;
（3）在第一至第十煤样罐67、68、69、70、71、72、73、74、75、76内装填煤样，通过第一温控仪25控制加热器设定高温恒温箱23内的试验温度，通过第二温控仪31控制制冷单元设定低温恒温箱29内的试验温度，高温恒温箱23温度设置范围为20℃至80℃，低温恒温箱29温度设置范围为-100℃至20℃，打开第一接口7、第三接口9和第五接口11，打开第一至第六气动阀35、39、42、44、48、51，关闭其余接口和气动阀，启动真空泵14对高温吸附单元和低温吸附单元进行脱气处理，直到真空计16压力显示20Pa以下并保持三个小时以上，然后关闭真空泵14和所有气动阀及接口，打开第一接口7和第二接口8，打开第一气动阀35，开启高压氦气瓶12，高压氦气经第二气体减压阀13减压处理后进入高温吸附单元的高压管3内，待第一压力传感器36示数稳定后，关闭第一气动阀35，依次打开第一至第五煤样罐67、68、69、70、71上的第三气动阀42，每次打开第三气动阀42后待相应煤样罐上的第三压力传感器41示数和第一压力传感器36的示数一致时，关闭该煤样罐上的第三气动阀42并记录下该煤样罐上的第三压力传感器41的示数，并且再次打开第一气动阀35，开启高压氦气瓶12，高压氦气经第二气体减压阀13减压处理后进入高温吸附单元的高压管3内，待第一压力传感器36示数稳定后，关闭第一气动阀35，从而得出第一至第五煤样罐67、68、69、70、71的自由空间体积；关闭第一接口7，打开第五接口11，打开第四气动阀44，开启高压氦气瓶12，高压氦气经第二气体减压阀13减压处理后进入低温吸附单元的高压管3内，待第四压力传感器45示数稳定后，关闭第四气动阀44，依次打开第六至第十煤样罐72、73、74、75、76上的第六气动阀51，每次打开第六气动阀51后待相应煤样罐上的第六压力传感器50示数和第四压力传感器45的示数一致时，关闭该煤样罐上的第六气动阀51并记录下该煤样罐上的第六压力传感器50的示数，并且再次打开第四气动阀44，开启高压氦气瓶12，高压氦气经第二气体减压阀13减压处理后进入低温吸附单元的高压管3内，待第四压力传感器45示数稳定后，关闭第四气动阀44，从而得出第六至第十煤样罐72、73、74、75、76的自由空间体积，关闭所有气动阀和接口；(3) Fill coal samples in the first to tenth coal sample tanks 67, 68, 69, 70, 71, 72, 73, 74, 75, and 76, and control the heater to set high temperature and constant temperature through the first temperature controller 25 The test temperature in the box 23 is controlled by the second temperature controller 31 to control the test temperature in the low-temperature constant temperature box 29. The temperature setting range of the high-temperature constant temperature box 23 is 20°C to 80°C, and the temperature setting range of the low-temperature constant temperature box 29 is -100°C to 20°C, open the first port 7, the third port 9, and the fifth port 11, open the first to sixth pneumatic valves 35, 39, 42, 44, 48, and 51, and close the remaining ports and pneumatic valves, Start the vacuum pump 14 to degas the high-temperature adsorption unit and the low-temperature adsorption unit until the pressure of the vacuum gauge 16 shows below 20 Pa and keep it for more than three hours, then close the vacuum pump 14 and all pneumatic valves and interfaces, open the first interface 7 and the second Interface 8, open the first pneumatic valve 35, open the high-pressure helium cylinder 12, the high-pressure helium gas enters the high-pressure pipe 3 of the high-temperature adsorption unit after being decompressed by the second gas pressure reducing valve 13, and waits for the first pressure sensor 36 to display the number After stabilization, close the first pneumatic valve 35, open the third pneumatic valve 42 on the first to fifth coal sample tanks 67, 68, 69, 70, 71 in turn, and wait for the corresponding coal sample to When the third pressure sensor 41 indication on the tank was consistent with the indication of the first pressure sensor 36, the third pneumatic valve 42 on the coal sample tank was closed and the third pressure sensor 41 on the coal sample tank was recorded. display, and open the first pneumatic valve 35 again, open the high-pressure helium cylinder 12, the high-pressure helium enters the high-pressure pipe 3 of the high-temperature adsorption unit after being decompressed by the second gas decompression valve 13, and waits for the first pressure sensor 36 After the reading is stable, close the first pneumatic valve 35 to obtain the free space volumes of the first to fifth coal sample tanks 67, 68, 69, 70, 71; close the first interface 7, open the fifth interface 11, open The fourth pneumatic valve 44 opens the high-pressure helium cylinder 12, and the high-pressure helium gas enters the high-pressure pipe 3 of the low-temperature adsorption unit after being decompressed by the second gas decompression valve 13, and is closed after the reading of the fourth pressure sensor 45 is stable. The fourth pneumatic valve 44 opens the sixth pneumatic valve 51 on the sixth to tenth coal sample tanks 72, 73, 74, 75, 76 in turn, and waits until the sixth pneumatic valve 51 on the corresponding coal sample tank is opened each time. When the readings of the six pressure sensors 50 were consistent with the readings of the fourth pressure sensor 45, the sixth pneumatic valve 51 on the coal sample tank was closed and the readings of the sixth pressure sensor 50 on the coal sample tank were recorded, and Open the fourth pneumatic valve 44 again, open the high-pressure helium cylinder 12, and the high-pressure helium gas enters the high-pressure pipe 3 of the low-temperature adsorption unit after being decompressed by the second gas pressure reducing valve 13, and after the fourth pressure sensor 45 shows a stable value , close the fourth pneumatic valve 44, thereby obtain the free space volume of the sixth to tenth coal sample tanks 72, 73, 74, 75, 76, close all pneumatic valves and interfaces;
（4）打开第一接口7、第三接口9和第五接口11，打开第一气动阀35、第三气动阀42、第四气动阀44和第六气动阀51，启动真空泵14对高温吸附单元和低温吸附单元进行脱气处理，直到真空计16压力显示20Pa以下并保持三个小时以上，然后关闭真空泵14和所有气动阀及接口，开启高压甲烷气瓶1，高压甲烷气经第一气体减压阀4减压处理后再经高压气体增压泵5增压到试验前由试验人员确定的预定吸附压力值储存在甲烷储气罐2内，打开第一接口7和第四接口10，打开第一气动阀35和第二气动阀39，将预定吸附压力值的甲烷气体充入第一气体缓冲罐34及其连接的高压管3内，待第一压力传感器36和第二压力传感器38的示数稳定后，关闭第一气动阀35和第二气动阀39，然后记录下此时第一压力传感器36的示数，依次打开第一至第五煤样罐67、68、69、70、71上的第三气动阀42，每次打开一个第三气动阀42后待相应煤样罐上的第三压力传感器41示数与第一压力传感器36的示数相对稳定后，关闭该煤样罐上的第三气动阀42，并记录此时该煤样罐上的第三压力传感器41的示数并关闭该第三气动阀42，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第三压力传感器41的示数，并且打开第二气动阀39，待第一压力传感器36和第二压力传感器38的示数稳定后，关闭第二气动阀39，从而分别计算出充入第一至第五煤样罐67、68、69、70、71内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第一至第五煤样罐67、68、69、70、71内吸附甲烷气体体积；关闭第一接口7，打开第五接口11，打开第四气动阀44和第五气动阀48，将预定吸附压力值的甲烷气体充入第二气体缓冲罐43及其连接的高压管3内，待第四压力传感器45和第五压力传感器47的示数稳定后，关闭第四气动阀44和第五气动阀48，然后记录下此时第四压力传感器45的示数，依次打开第六至第十煤样罐72、73、74、75、76上的第六气动阀51，每次打开一个第六气动阀51后待相应煤样罐上的第六压力传感器50示数与第四压力传感器45的示数相对稳定后，关闭该煤样罐上的第六气动阀51，并记录此时该煤样罐上的第六压力传感器50的示数并关闭该第六气动阀51，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第六压力传感器50的示数，并且打开第五气动阀48，待第四压力传感器45和第六压力传感器50的示数稳定后，关闭第五气动阀48，从而分别计算出充入第六至第十煤样罐72、73、74、75、76内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第六至第十煤样罐72、73、74、75、76内吸附甲烷气体体积，关闭所有气动阀和接口；(4) Open the first interface 7, the third interface 9 and the fifth interface 11, open the first pneumatic valve 35, the third pneumatic valve 42, the fourth pneumatic valve 44 and the sixth pneumatic valve 51, and start the vacuum pump 14 for high temperature adsorption The unit and the low-temperature adsorption unit are degassed until the pressure of the vacuum gauge 16 shows below 20 Pa and kept for more than three hours, then close the vacuum pump 14 and all pneumatic valves and interfaces, open the high-pressure methane cylinder 1, and the high-pressure methane gas passes through the first gas After decompression treatment by the pressure reducing valve 4, it is pressurized by the high-pressure gas booster pump 5 to the predetermined adsorption pressure value determined by the test personnel before the test and stored in the methane gas storage tank 2, and the first interface 7 and the fourth interface 10 are opened. Open the first pneumatic valve 35 and the second pneumatic valve 39, fill the methane gas with predetermined adsorption pressure value into the first gas buffer tank 34 and the high-pressure pipe 3 connected thereto, wait for the first pressure sensor 36 and the second pressure sensor 38 After the readings of the first pressure sensor 36 are stabilized, close the first pneumatic valve 35 and the second pneumatic valve 39, then record the readings of the first pressure sensor 36 at this time, and open the first to fifth coal sample tanks 67, 68, 69, 70 successively , 71 on the third pneumatic valve 42, each time after opening a third pneumatic valve 42, after the third pressure sensor 41 indication on the corresponding coal sample tank is relatively stable with the indication of the first pressure sensor 36, close the coal The third pneumatic valve 42 on the sample tank, and record the indication of the third pressure sensor 41 on the coal sample tank at this time and close the third pneumatic valve 42, keep it for seven hours, so that the coal sample is fully adsorbed to reach equilibrium, Record the reading of the third pressure sensor 41 on the coal sample tank at this time, and open the second pneumatic valve 39, after the readings of the first pressure sensor 36 and the second pressure sensor 38 are stable, close the second pneumatic valve 39 , so as to calculate respectively the methane gas volume and the methane gas volume in the free state charged into the first to fifth coal sample tanks 67, 68, 69, 70, 71, and finally obtain the first to fifth coal sample tanks 67, 68, 69, 70, 71 the volume of adsorbed methane gas; close the first port 7, open the fifth port 11, open the fourth pneumatic valve 44 and the fifth pneumatic valve 48, and fill the methane gas with predetermined adsorption pressure value into the second In the gas buffer tank 43 and the high-pressure pipe 3 connected thereto, after the indications of the fourth pressure sensor 45 and the fifth pressure sensor 47 are stable, close the fourth pneumatic valve 44 and the fifth pneumatic valve 48, and then record the first The readings of the four pressure sensors 45, open the sixth pneumatic valve 51 on the sixth to tenth coal sample tanks 72, 73, 74, 75, 76 in turn, and wait for the corresponding coal sample tank after opening a sixth pneumatic valve 51 at a time. After the reading of the sixth pressure sensor 50 and the reading of the fourth pressure sensor 45 are relatively stable, close the sixth pneumatic valve 51 on the coal sample tank, and record the sixth pressure sensor 50 on the coal sample tank at this time. and close the sixth pneumatic valve 51, keep it for seven hours, so that the coal sample is fully adsorbed to reach equilibrium, record the reading of the sixth pressure sensor 50 on the coal sample tank at this time, and open the fifth pneumatic valve 48 , to be the fourth pressure sensor 45 and the sixth pressure sensor After the indication of device 50 is stable, close the fifth pneumatic valve 48, thereby calculate respectively the methane gas volume and the methane gas under the free state filled in the sixth to tenth coal sample tanks 72, 73, 74, 75, 76 volume, and finally obtain the volume of adsorbed methane gas in the sixth to tenth coal sample tanks 72, 73, 74, 75, and 76, and close all pneumatic valves and interfaces;
（5）步骤（3）和步骤（4）为吸附甲烷气体体积测量方法，使用该方法测量吸附甲烷气体体积前，由试验人员确定该方法中高温吸附单元和低温吸附单元中第一气体缓冲罐34和第二气体缓冲罐43的Ｎ个预定吸附压力值，N为小于10的正整数，使用吸附甲烷气体体积测量方法进行N次步骤（3）和步骤（4），在最低的预定吸附压力值条件下，采用所述吸附甲烷气体体积测量方法进行操作，得到第一至第十煤样罐67、68、69、70、71、72、73、74、75、76内吸附的甲烷气体体积，然后通过高压气体增压泵5将第一气体缓冲罐34和第二气体缓冲罐43的压力值增高到下一预定吸附压力值；在下一预定吸附压力值的条件下重得进行步骤（3）和步骤（4），直到Ｎ次步骤（3）和步骤（4）的操作完成后，得到N个预定吸附压力值下的第一至第十煤样罐67、68、69、70、71、72、73、74、75、76内吸附的甲烷气体体积；(5) Steps (3) and (4) are methods for measuring the volume of adsorbed methane gas. Before using this method to measure the volume of adsorbed methane gas, the tester shall determine the first gas buffer tank in the high-temperature adsorption unit and the low-temperature adsorption unit in this method. 34 and the N predetermined adsorption pressure values of the second gas buffer tank 43, where N is a positive integer less than 10, use the method of measuring the volume of adsorbed methane gas to carry out N times of steps (3) and (4), at the lowest predetermined adsorption pressure Under the condition of the above value, the method for measuring the volume of adsorbed methane gas is used to obtain the volume of methane gas adsorbed in the first to tenth coal sample tanks 67, 68, 69, 70, 71, 72, 73, 74, 75, and 76 , then the pressure value of the first gas buffer tank 34 and the second gas buffer tank 43 is increased to the next predetermined adsorption pressure value by the high-pressure gas booster pump 5; under the condition of the next predetermined adsorption pressure value, step (3) is carried out again ) and step (4), until N times of steps (3) and (4) are completed, the first to tenth coal sample tanks 67, 68, 69, 70, 71 under N predetermined adsorption pressure values are obtained , 72, 73, 74, 75, 76 the volume of methane gas adsorbed;
（6）打开第一接口7、第三接口9和第五接口11，打开第一气动阀35、第三气动阀42、第四气动阀44和第六气动阀51，启动真空泵14对高温吸附单元和低温吸附单元进行脱气处理，直到真空计16压力显示20Pa以下并保持三个小时以上，然后关闭真空泵14和所有气动阀及接口，开启高压甲烷气瓶1，高压甲烷气经第一气体减压阀4减压处理后再经高压气体增压泵5增压到试验前由试验人员确定的预定解吸压力值储存在甲烷储气罐2内，打开第一接口7和第四接口10，打开第一气动阀35和第二气动阀39，将预定解吸压力值的甲烷气体充入第一气体缓冲罐34及其连接的高压管3内，待第一压力传感器36和第二压力传感器38的示数稳定后，关闭第一气动阀35和第二气动阀39，然后记录下此时第一压力传感器36的示数，依次打开第一至第五煤样罐67、68、69、70、71上的第三气动阀42，每次打开一个第三气动阀42后待相应煤样罐上的第三压力传感器41示数与第一压力传感器36的示数相对稳定后，关闭该煤样罐上的第三气动阀42，并记录此时该煤样罐上的第三压力传感器41的示数并关闭该第三气动阀42，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第三压力传感器41的示数，并且打开第二气动阀39，待第一压力传感器36和第二压力传感器38的示数稳定后，关闭第二气动阀39，从而分别计算出充入第一至第五煤样罐67、68、69、70、71内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第一至第五煤样罐67、68、69、70、71内吸附甲烷气体体积；关闭第一接口7，打开第五接口11，打开第四气动阀44和第五气动阀48，将预定解吸压力值的甲烷气体充入第二气体缓冲罐43及其连接的高压管3内，待第四压力传感器45和第五压力传感器47的示数稳定后，关闭第四气动阀44和第五气动阀48，然后记录下此时第四压力传感器45的示数，依次打开第六至第十煤样罐72、73、74、75、76上的第六气动阀51，每次打开一个第六气动阀51后待相应煤样罐上的第六压力传感器50示数与第四压力传感器45的示数相对稳定后，关闭该煤样罐上的第六气动阀51，并记录此时该煤样罐上的第六压力传感器50的示数并关闭该第六气动阀51，保持七个小时，使煤样充分吸附达到平衡，记录此时该煤样罐上的第六压力传感器50的示数，并且打开第五气动阀48，待第四压力传感器45和第六压力传感器50的示数稳定后，关闭第五气动阀48，从而分别计算出充入第六至第十煤样罐72、73、74、75、76内的甲烷气体体积及游离状态下的甲烷气体体积，最终得到第六至第十煤样罐72、73、74、75、76内吸附甲烷气体体积，关闭所有气动阀和接口，煤样达到吸附平衡后，打开第六接口18、第七接口19、第八接口20、第十接口22和第九气动阀59，依次打开第一至第五煤样罐67、68、69、70、71上的第三气动阀42，分别对第一至第五煤样罐67、68、69、70、71内游离状态下的甲烷气体进行排空，每次打开一个第三气动阀42后待相应煤样罐上的第三压力传感器41示数为零时，关闭第九气动阀59，采用计算机60自动控制第一解吸气体流量计77、第二解吸气体流量计78、第三解吸气体流量计79上的第七气动阀53以及第八气动阀57，首先选取第一解吸气体流量计77，当甲烷气体流量大于450ml/min时，计算机60控制将第一解吸气体流量计77上的第七气动阀53打开，通过第一解吸气体流量计77测得解吸出的甲烷气体体积，当甲烷气体流量在80ml/min-450ml/min之间时，计算机60将第二解吸气体流量计78上的第七气动阀53打开，通过第二解吸气体流量计78测得解吸出的甲烷气体体积，当甲烷气体流量在20ml/min-80ml/min之间时，计算机60将第三解吸气体流量计79上的第七气动阀53打开，通过第三解吸气体流量计79测得解吸出的甲烷气体体积，当甲烷气体流量小于20ml/min，计算机60将第八气动阀57打开，通过气排水计量装置测得解吸出的甲烷气体体积，从而测得第一至第五煤样罐67、68、69、70、71内解吸出的甲烷气体体积；然后关闭第八接口20，打开第九接口21和第九气动阀59，依次打开第六至第十煤样罐72、73、74、75、76上的第六气动阀51，分别对第六至第十煤样罐72、73、74、75、76内游离状态下的甲烷气体进行排空，每次打开一个第六气动阀51后待相应煤样罐上的第六压力传感器50示数为零时，关闭第九气动阀59，采用计算机60自动控制第一解吸气体流量计77、第二解吸气体流量计78、第三解吸气体流量计79上的第七气动阀53以及第八气动阀57，通过第一解吸气体流量计77、第二解吸气体流量计78、第三解吸气体流量计79和气排水计量装置，测得第六至第十煤样罐72、73、74、75、76内解吸出的甲烷气体体积，整个解吸过程中计算机60实时采集瞬时流量和累积流量，并生成数据报表及曲线；(6) Open the first interface 7, the third interface 9 and the fifth interface 11, open the first pneumatic valve 35, the third pneumatic valve 42, the fourth pneumatic valve 44 and the sixth pneumatic valve 51, and start the vacuum pump 14 for high temperature adsorption The unit and the low-temperature adsorption unit are degassed until the pressure of the vacuum gauge 16 shows below 20 Pa and kept for more than three hours, then close the vacuum pump 14 and all pneumatic valves and interfaces, open the high-pressure methane cylinder 1, and the high-pressure methane gas passes through the first gas After the decompression treatment by the pressure reducing valve 4, it is pressurized by the high-pressure gas booster pump 5 to the predetermined desorption pressure value determined by the test personnel before the test and stored in the methane gas storage tank 2, and the first interface 7 and the fourth interface 10 are opened. Open the first pneumatic valve 35 and the second pneumatic valve 39, fill the methane gas with the predetermined desorption pressure value into the first gas buffer tank 34 and the high-pressure pipe 3 connected thereto, wait for the first pressure sensor 36 and the second pressure sensor 38 After the readings of the first pressure sensor 36 are stabilized, close the first pneumatic valve 35 and the second pneumatic valve 39, then record the readings of the first pressure sensor 36 at this time, and open the first to fifth coal sample tanks 67, 68, 69, 70 successively , 71 on the third pneumatic valve 42, each time after opening a third pneumatic valve 42, after the third pressure sensor 41 indication on the corresponding coal sample tank is relatively stable with the indication of the first pressure sensor 36, close the coal The third pneumatic valve 42 on the sample tank, and record the indication of the third pressure sensor 41 on the coal sample tank at this time and close the third pneumatic valve 42, keep it for seven hours, so that the coal sample is fully adsorbed to reach equilibrium, Record the reading of the third pressure sensor 41 on the coal sample tank at this time, and open the second pneumatic valve 39, after the readings of the first pressure sensor 36 and the second pressure sensor 38 are stable, close the second pneumatic valve 39 , so as to calculate respectively the methane gas volume and the methane gas volume in the free state charged into the first to fifth coal sample tanks 67, 68, 69, 70, 71, and finally obtain the first to fifth coal sample tanks 67, 68, 69, 70, 71 the volume of adsorbed methane gas; close the first port 7, open the fifth port 11, open the fourth pneumatic valve 44 and the fifth pneumatic valve 48, and fill the methane gas with a predetermined desorption pressure value into the second In the gas buffer tank 43 and the high-pressure pipe 3 connected thereto, after the indications of the fourth pressure sensor 45 and the fifth pressure sensor 47 are stable, close the fourth pneumatic valve 44 and the fifth pneumatic valve 48, and then record the first The readings of the four pressure sensors 45, open the sixth pneumatic valve 51 on the sixth to tenth coal sample tanks 72, 73, 74, 75, 76 in turn, and wait for the corresponding coal sample tank after opening a sixth pneumatic valve 51 at a time. After the reading of the sixth pressure sensor 50 and the reading of the fourth pressure sensor 45 are relatively stable, close the sixth pneumatic valve 51 on the coal sample tank, and record the sixth pressure sensor 50 on the coal sample tank at this time. and close the sixth pneumatic valve 51, keep it for seven hours, so that the coal sample is fully adsorbed to reach equilibrium, record the reading of the sixth pressure sensor 50 on the coal sample tank at this time, and open the fifth pneumatic valve 48 , to be the fourth pressure sensor 45 and the sixth pressure sensor After the indication of device 50 is stable, close the fifth pneumatic valve 48, thereby calculate respectively the methane gas volume and the methane gas under the free state filled in the sixth to tenth coal sample tanks 72, 73, 74, 75, 76 Finally, the volume of adsorbed methane gas in the sixth to tenth coal sample tanks 72, 73, 74, 75, and 76 is obtained. Close all pneumatic valves and interfaces. After the coal sample reaches adsorption equilibrium, open the sixth interface 18 and the seventh interface. 19. The eighth interface 20, the tenth interface 22, and the ninth pneumatic valve 59 open the third pneumatic valve 42 on the first to fifth coal sample tanks 67, 68, 69, 70, and 71 in sequence, respectively for the first to fifth coal sample tanks. The methane gas in the free state in the fifth coal sample tank 67, 68, 69, 70, 71 is evacuated, and the third pressure sensor 41 on the corresponding coal sample tank is displayed after opening a third pneumatic valve 42 each time. At zero o'clock, close the ninth pneumatic valve 59, and adopt the computer 60 to automatically control the seventh pneumatic valve 53 and the eighth pneumatic valve on the first desorption gas flow meter 77, the second desorption gas flow meter 78, and the third desorption gas flow meter 79 57, first select the first desorption gas flow meter 77, when the methane gas flow rate is greater than 450ml/min, the computer 60 controls the seventh pneumatic valve 53 on the first desorption gas flow meter 77 to open, and the first desorption gas flow meter 77 Measure the desorbed methane gas volume, when the methane gas flow rate is between 80ml/min-450ml/min, the computer 60 opens the seventh pneumatic valve 53 on the second desorbed gas flowmeter 78, and passes the second desorbed gas flow rate Meter 78 measures the desorbed methane gas volume, and when the methane gas flow rate is between 20ml/min-80ml/min, the computer 60 opens the seventh pneumatic valve 53 on the third desorbed gas flowmeter 79, through the third desorbed The gas flow meter 79 measures the desorbed methane gas volume, and when the methane gas flow rate is less than 20ml/min, the computer 60 opens the eighth pneumatic valve 57, and measures the desorbed methane gas volume through the gas drainage metering device, thereby measuring the first The methane gas volume desorbed in the first to fifth coal sample tanks 67, 68, 69, 70, 71; then close the eighth interface 20, open the ninth interface 21 and the ninth pneumatic valve 59, and open the sixth to tenth in turn The sixth pneumatic valve 51 on the coal sample tanks 72, 73, 74, 75, 76 empties the methane gas in the free state in the sixth to tenth coal sample tanks 72, 73, 74, 75, 76 respectively, After opening a sixth pneumatic valve 51 at a time, when the sixth pressure sensor 50 on the corresponding coal sample tank shows zero, close the ninth pneumatic valve 59, and adopt computer 60 to automatically control the first desorption gas flowmeter 77, the second The seventh pneumatic valve 53 and the eighth pneumatic valve 57 on the desorption gas flow meter 78, the third desorption gas flow meter 79 pass through the first desorption gas flow meter 77, the second desorption gas flow meter 78, the third desorption gas flow meter 79 and gas drainage metering device, measuring the sixth to tenth coal sample tanks 72, 73, 74, 75, 76 The volume of methane gas desorbed inside, the computer 60 collects instantaneous flow and cumulative flow in real time during the whole desorption process, and generates data reports and curves;
（7）步骤（6）为解吸甲烷气体体积测量方法，使用该方法测量解吸甲烷气体体积前，由试验人员确定该方法中高温吸附单元和低温吸附单元中第一气体缓冲罐34和第二气体缓冲罐43的Ｎ个预定解吸压力值，N为小于10的正整数，使用解吸甲烷气体体积测量方法进行N次步骤（6），在最低的预定解吸压力值条件下，采用所述解吸甲烷气体体积测量方法进行操作，得到第一至第十煤样罐67、68、69、70、71、72、73、74、75、76内解吸出的甲烷气体体积，然后通过高压气体增压泵5将第一气体缓冲罐34和第二气体缓冲罐43的压力值增高到下一预定解吸压力值；在下一预定解吸压力值的条件下重得进行步骤（6），直到Ｎ次步骤（6）的操作完成后，得到N个预定解吸压力值下的第一至第十煤样罐67、68、69、70、71、72、73、74、75、76内吸附的甲烷气体体积。(7) Step (6) is a method for measuring the volume of desorbed methane gas. Before using this method to measure the volume of desorbed methane gas, the tester determines the first gas buffer tank 34 and the second gas buffer tank 34 in the high-temperature adsorption unit and the low-temperature adsorption unit in this method. N predetermined desorption pressure values of the buffer tank 43, where N is a positive integer less than 10, use the desorption methane gas volume measurement method to perform N times of step (6), and use the desorption methane gas volume measurement method under the lowest predetermined desorption pressure value The volume measurement method is operated to obtain the methane gas volume desorbed in the first to tenth coal sample tanks 67, 68, 69, 70, 71, 72, 73, 74, 75, and 76, and then through the high-pressure gas booster pump 5 Increase the pressure value of the first gas buffer tank 34 and the second gas buffer tank 43 to the next predetermined desorption pressure value; repeat step (6) under the condition of the next predetermined desorption pressure value until N times of step (6) After the operation is completed, the methane gas volumes adsorbed in the first to tenth coal sample tanks 67, 68, 69, 70, 71, 72, 73, 74, 75, 76 under N predetermined desorption pressure values are obtained.
本实施例并非对本发明的形状、材料、结构等作任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均属于本发明技术方案的保护范围。This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention belong to the protection of the technical solution of the present invention. scope.
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