技术领域Technical Field
本申请涉及盐穴储能技术领域，尤其涉及一种盐穴沉渣空隙储能模拟实验的高压伺服控制系统及方法。The present application relates to the technical field of salt cavern energy storage, and in particular to a high-voltage servo control system and method for a salt cavern sediment void energy storage simulation experiment.
背景技术Background Art
中国盐穴储气库全部建造在湖相沉积形成的层状盐岩中，这种盐岩地层具有盐层厚度小，夹层多，不溶杂质含量高等特点。盐层水溶造腔后形成的腔体被大量不溶物沉渣所掩埋，储气库有效体积小。利用沉渣空隙储气，能解决高杂质盐矿有效储气体积不足这一问题。All of China's salt cavern gas storages are built in layered salt rocks formed by lake-phase deposition. This type of salt rock strata has the characteristics of small salt layer thickness, many interlayers, and high insoluble impurity content. The cavity formed after the salt layer is dissolved by water is buried by a large amount of insoluble sediment, and the effective volume of the gas storage is small. Using the sediment gap to store gas can solve the problem of insufficient effective gas storage volume in high-impurity salt mines.
盐腔埋深一般在1000米，腔内卤水承受的卤水液柱压力约为10MPa。但是，目前关于沉渣空隙储能模拟实验均是在低压(小于1MPa)状态下进行的，无法真实模拟现场盐腔高压卤水环境。The depth of salt caverns is generally 1,000 meters, and the brine in the caverns is subjected to a brine column pressure of about 10 MPa. However, current simulation experiments on sediment void energy storage are all conducted under low pressure (less than 1 MPa), which cannot truly simulate the high-pressure brine environment of the on-site salt caverns.
在实际注气排卤过程中，需定期在排卤井中注清水进行反冲洗，以防排卤管结晶堵塞或水平腔沉渣颗粒堵塞，导致注气排卤失败。这一过程需进行注气排卤和注卤排气两个过程交替循环进行。但是，目前已有的沉渣空隙储能模拟实验装置，还不能控制这两个过程的交替循环过程。In the actual process of gas injection and brine removal, it is necessary to regularly inject clean water into the brine removal well for backwashing to prevent the brine removal pipe from being blocked by crystals or the horizontal cavity from being blocked by sediment particles, which may lead to failure of gas injection and brine removal. This process requires alternating cycles of gas injection and brine removal and brine injection and exhaust. However, the existing sediment void energy storage simulation experimental device cannot control the alternating cycle of these two processes.
发明内容Summary of the invention
为了解决上述问题，本申请提供一种盐穴沉渣空隙储能模拟实验的高压伺服控制系统及方法，可真实模拟实际盐腔中的高压卤水环境，实现注气排卤和注卤排气的交替循环控制，填补当前盐腔实验模拟系统的空白，所述技术方案如下：In order to solve the above problems, the present application provides a high-pressure servo control system and method for a salt cavern sediment void energy storage simulation experiment, which can truly simulate the high-pressure brine environment in an actual salt cavern, realize the alternating cycle control of gas injection and brine exhaust and brine injection and exhaust, and fill the gap in the current salt cavern experimental simulation system. The technical solution is as follows:
本申请第一方面提供一种盐穴沉渣空隙储能模拟实验的高压伺服控制系统，包括高压盐腔模拟系统、气相注入系统和液相注入系统，所述高压盐腔模拟系统包括高压腔室和与所述高压腔室通过连通管相连通的排卤管，在所述高压腔室的进出口管路上分别设有背压阀，所述高压腔室通过所述背压阀设置目标压力阈值实现高压环境；所述气相注入系统用于向所述高压盐腔模拟系统注入气体，包括气液分离罐和分别与所述气液分离罐并联连接的气相注气排卤管路和气相注卤排气管路；所述液相注入系统用于向所述高压盐腔模拟系统注入液体，包括储水罐和分别与所述储水罐并联连接的液相注气排卤管路和液相注卤排气管路。The first aspect of the present application provides a high-pressure servo control system for a salt cavern sediment void energy storage simulation experiment, comprising a high-pressure salt cavern simulation system, a gas phase injection system and a liquid phase injection system, the high-pressure salt cavern simulation system comprising a high-pressure chamber and a brine discharge pipe connected to the high-pressure chamber through a connecting pipe, back pressure valves are respectively provided on the inlet and outlet pipelines of the high-pressure chamber, and the high-pressure chamber sets a target pressure threshold through the back pressure valve to achieve a high-pressure environment; the gas phase injection system is used to inject gas into the high-pressure salt cavern simulation system, comprising a gas-liquid separation tank and a gas-phase gas injection and brine discharge pipeline and a gas-phase brine injection and exhaust pipeline respectively connected in parallel with the gas-liquid separation tank; the liquid phase injection system is used to inject liquid into the high-pressure salt cavern simulation system, comprising a water storage tank and a liquid-phase gas injection and brine discharge pipeline and a liquid-phase brine injection and exhaust pipeline respectively connected in parallel with the water storage tank.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，在所述液相注气排卤管路上设有第一液体流量计，在所述液相注卤排气管路上设有与所述储水罐连接的柱塞泵、PLC变频器和第二液体流量计，所述PLC变频器用于实时采集所述第二液体流量计的数值，通过实时向所述柱塞泵发送反馈信号以控制所述柱塞泵的泵送速率，所述柱塞泵用于提供注卤排气过程中恒定流量的高压卤水。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, a first liquid flow meter is provided on the liquid-phase gas injection and brine exhaust pipeline, and a plunger pump connected to the water storage tank, a PLC frequency converter and a second liquid flow meter are provided on the liquid-phase brine injection and exhaust pipeline. The PLC frequency converter is used to collect the value of the second liquid flow meter in real time, and to control the pumping rate of the plunger pump by sending a feedback signal to the plunger pump in real time. The plunger pump is used to provide a constant flow of high-pressure brine during the brine injection and exhaust process.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，在所述气相注气排卤管路上设有气瓶和第一气体流量控制器，在所述气相注卤排气管路上设有第二气体流量控制器和与所述第二气体流量控制器连接的放空管路，所述第一气体流量控制器用于控制注入的气体以给定流量注入所述高压腔室。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, a gas cylinder and a first gas flow controller are provided on the gas-phase gas injection and brine exhaust pipeline, and a second gas flow controller and a venting pipeline connected to the second gas flow controller are provided on the gas-phase brine injection and exhaust pipeline, and the first gas flow controller is used to control the injected gas to be injected into the high-pressure chamber at a given flow rate.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，所述连通管道为变径管，且变径管的管径沿从所述高压腔室指向所述排卤管的方向逐渐递减，所述变径管用于模拟沉渣颗粒砂堵状态。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, the connecting pipe is a reducer, and the diameter of the reducer gradually decreases in the direction from the high-pressure chamber to the brine discharge pipe, and the reducer is used to simulate the sand blockage state of sediment particles.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，所述连通管道的一端与所述高压腔室的底部连接，所述连通管道为水平向布置，所述排卤管为竖直向布置。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, one end of the connecting pipe is connected to the bottom of the high-pressure chamber, the connecting pipe is arranged horizontally, and the brine discharge pipe is arranged vertically.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，在所述高压腔室沿深度方向上开设数个视窗。For example, in a high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, a plurality of windows are opened in the high-pressure chamber along the depth direction.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，在所述高压腔室沿深度方向上安设卤水孔隙压力传感器，以监测沉渣中的卤水孔隙压力。For example, in a high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, a brine pore pressure sensor is installed in the high-pressure chamber along the depth direction to monitor the brine pore pressure in the sediment.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，在所述高压腔室入口管路上设有压力表以实时监测注入的气体压力，在所述排卤管出口管路上设有压力表以实时监测排出的卤水压力。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, a pressure gauge is provided on the inlet pipeline of the high-pressure chamber to monitor the injected gas pressure in real time, and a pressure gauge is provided on the outlet pipeline of the brine discharge pipe to monitor the discharged brine pressure in real time.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，所述气瓶内存储高压氮气。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, high-pressure nitrogen is stored in the gas cylinder.
本申请第二方面提供一种盐穴沉渣空隙储能模拟实验的高压伺服控制方法，采用上述盐穴沉渣空隙储能模拟实验的高压伺服控制系统，包括以下步骤：The second aspect of the present application provides a high-voltage servo control method for a salt cavern sediment void energy storage simulation experiment, which uses the high-voltage servo control system for the salt cavern sediment void energy storage simulation experiment, including the following steps:
S1准备高杂质盐矿沉渣样品；控制沉渣颗粒级配，分层堆积沉渣颗粒到高压腔室；S1 prepares high-impurity salt mine sediment samples; controls the sediment particle gradation, and stacks the sediment particles in layers into the high-pressure chamber;
S2启动液相注入系统，将高压腔室中充满饱和卤水，使饱和卤水能通过气液分离罐流出；S2 starts the liquid phase injection system to fill the high-pressure chamber with saturated brine so that the saturated brine can flow out through the gas-liquid separation tank;
S3设置高压腔室进出口背压阀目标阈值，启动气相注入系统，将氮气注入到高压腔室，建立高压卤水环境；S3 sets the target threshold of the back pressure valve at the inlet and outlet of the high-pressure chamber, starts the gas phase injection system, injects nitrogen into the high-pressure chamber, and establishes a high-pressure brine environment;
S4启动液相注入系统，将卤水以高压伺服控制模式注入到高压腔室，排出气体；S4 starts the liquid phase injection system, injects brine into the high pressure chamber in a high pressure servo control mode, and exhausts the gas;
S5关闭进气开关和进卤开关，打开放空阀和排卤开关，将高压腔室泄压，排出沉渣准备下一个实验过程；S5 turns off the air inlet switch and the brine inlet switch, opens the vent valve and the brine discharge switch, releases the pressure in the high-pressure chamber, discharges the sediment and prepares for the next experimental process;
其中，所述S3与所述S4循环往复，可进行注卤排气和注气排卤模拟实验的交替循环。The S3 and the S4 are circulated back and forth, and the alternating cycles of brine injection and exhaust and gas injection and brine exhaust simulation experiments can be performed.
本申请一些实施例提供的一种盐穴沉渣空隙储能模拟实验的高压伺服控制系统及方法带来的有益效果为：本申请可真实模拟实际盐腔中的高压卤水环境，实现注气排卤和注卤排气的交替循环控制，填补当前盐腔实验模拟系统的空白；真实高压伺服环境使实验数据更准确，采用设计的高压腔室结构，能承受15MPa及以上的压力，通过在高压腔室进出口增加背压阀，设定目标阈值，实现高压腔室中的高压环境，采用设计的伺服控制结构，PLC变频器的数据实时采集和反馈功能控制柱塞泵的注卤速率，控制注卤流量，实现了高压伺服控制注卤的目的；注气排卤和注卤排气循环使实验过程更合理，通过采用电气控制气相注入和液相注入阀门，可动态切换注气排卤和注卤排气两个循环过程，不断切换这一过程，便能够实现注气排卤和注卤排气两个过程交替循环控制。The beneficial effects of a high-pressure servo control system and method for a salt cavern sediment void energy storage simulation experiment provided by some embodiments of the present application are as follows: the present application can truly simulate the high-pressure brine environment in an actual salt cavern, realize the alternating cycle control of gas injection and brine expulsion and brine injection and exhaust, and fill the gap in the current salt cavern experimental simulation system; the real high-pressure servo environment makes the experimental data more accurate, and the designed high-pressure chamber structure is adopted to withstand a pressure of 15MPa and above, and a back pressure valve is added at the inlet and outlet of the high-pressure chamber to set a target threshold to achieve a high-pressure environment in the high-pressure chamber, and the designed servo control structure and the real-time data acquisition and feedback function of the PLC inverter control the brine injection rate of the plunger pump and the brine injection flow rate, thereby achieving the purpose of high-pressure servo control of brine injection; the gas injection and brine expulsion and brine injection and exhaust cycles make the experimental process more reasonable, and the two cycle processes of gas injection and brine expulsion and brine injection and exhaust can be dynamically switched by adopting electrically controlled gas phase injection and liquid phase injection valves, and the alternating cycle control of gas injection and brine expulsion and brine injection and exhaust can be realized by continuously switching this process.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本说明书实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
图1为本申请的盐穴沉渣空隙储能模拟实验的高压伺服控制系统结构示意图；FIG1 is a schematic diagram of the structure of a high-voltage servo control system for a salt cavern sediment void energy storage simulation experiment of the present application;
图2为本申请的盐穴沉渣空隙储能模拟实验的高压伺服控制方法流程图。FIG2 is a flow chart of the high-voltage servo control method for the salt cavern sediment void energy storage simulation experiment of the present application.
具体实施方式DETAILED DESCRIPTION
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
本申请第一方面提供一种盐穴沉渣空隙储能模拟实验的高压伺服控制系统，如图1所示，包括高压盐腔模拟系统100、气相注入系统200和液相注入系统300，所述高压盐腔模拟系统100包括高压腔室110和与所述高压腔室110通过连通管120相连通的排卤管130，在所述高压腔室110的进出口管路上分别设有背压阀，具体地，在所述排卤管130的出口管路设有背压阀P2,在所述高压腔室110的入口管路上设有背压阀P1，所述高压腔室110通过所述背压阀设置目标压力阈值实现高压环境；所述气相注入系统200用于向所述高压盐腔模拟系统100注入气体，包括气液分离罐210和分别与所述气液分离罐210并联连接的气相注气排卤管路220和气相注卤排气管路230；所述液相注入系统300用于向所述高压盐腔模拟系统100注入液体，包括储水罐310和分别与所述储水罐310并联连接的液相注气排卤管路320和液相注卤排气管路330。In a first aspect, the present application provides a high-pressure servo control system for a salt cavern sediment void energy storage simulation experiment, as shown in FIG1 , comprising a high-pressure salt cavern simulation system 100, a gas phase injection system 200 and a liquid phase injection system 300, wherein the high-pressure salt cavern simulation system 100 comprises a high-pressure chamber 110 and a brine discharge pipe 130 connected to the high-pressure chamber 110 via a connecting pipe 120, and back pressure valves are respectively provided on the inlet and outlet pipelines of the high-pressure chamber 110, specifically, a back pressure valve P2 is provided on the outlet pipeline of the brine discharge pipe 130, and a back pressure valve P is provided on the inlet pipeline of the high-pressure chamber 110. 1. The high-pressure chamber 110 realizes a high-pressure environment by setting a target pressure threshold through the back pressure valve; the gas phase injection system 200 is used to inject gas into the high-pressure salt chamber simulation system 100, including a gas-liquid separation tank 210 and a gas-phase gas injection and brine exhaust pipeline 220 and a gas-phase brine injection and exhaust pipeline 230 respectively connected in parallel with the gas-liquid separation tank 210; the liquid phase injection system 300 is used to inject liquid into the high-pressure salt chamber simulation system 100, including a water storage tank 310 and a liquid-phase gas injection and brine exhaust pipeline 320 and a liquid-phase brine injection and exhaust pipeline 330 respectively connected in parallel with the water storage tank 310.
本申请的高压盐腔模拟系统100用于模拟高压注气排卤过程中气液界面和沉渣状态的变化，真实高压伺服环境使实验数据更准确，采用设计的高压腔室110结构，能承受15MPa及以上的压力，克服现有关于沉渣空隙储能模拟实验在低压(小于1MPa)状态下进行的，无法真实模拟现场盐腔高压卤水环境的缺陷。The high-pressure salt cavity simulation system 100 of the present application is used to simulate the changes in the gas-liquid interface and the sediment state during the high-pressure gas injection and brine removal process. The real high-pressure servo environment makes the experimental data more accurate. The designed high-pressure chamber 110 structure can withstand a pressure of 15MPa and above, overcoming the defect that the existing sediment void energy storage simulation experiment is conducted under low pressure (less than 1MPa) and cannot truly simulate the on-site salt cavity high-pressure brine environment.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，如图1所示，所述连通管120为变径管，且变径管的管径沿从所述高压腔室110指向所述排卤管130的方向逐渐递减，所述变径连通管120用于模拟沉渣颗粒砂堵状态。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, as shown in FIG1 , the connecting pipe 120 is a reducer, and the diameter of the reducer gradually decreases in the direction from the high-pressure chamber 110 to the brine discharge pipe 130, and the reducer connecting pipe 120 is used to simulate the sand blockage state of sediment particles.
其中，变径管120沿水平方向布设，一端与高压腔室110底部连接，排卤管130沿垂直方向布设。The reducer 120 is arranged in the horizontal direction, with one end connected to the bottom of the high-pressure chamber 110 , and the brine exhaust pipe 130 is arranged in the vertical direction.
根据上述实施例，高压腔室110用于模拟高压注气排卤过程中气液界面和沉渣状态的变化，高压腔室110采用背压阀设置目标压力阈值实现高压环境，当高压腔室110中的压力达到设定的目标压力阈值时，背压阀自动开启，腔室中的卤水在气体压力的推动作用下排出；在实验时，高压腔室110中分层装填沉渣颗粒，颗粒空隙间充满卤水，高压腔室110入口管路上的压力表实时监测注入的气体压力，排卤管130出口管路的上压力表实时监测排出的卤水压力。在高压腔室110沿深度方向上开设上、中、下三个视窗140，可以观察高压腔室110内部沉渣颗粒运移。变径连通管120用于模拟沉渣颗粒砂堵状态，采用变径管横截面积逐渐变小来提高排卤流速，携带底部沉渣颗粒来模拟颗粒运移淤堵现象。通过注入的气体压力增大反映沉渣颗粒砂堵发生，通过监测排出卤水的流量，分析沉渣颗粒的起动流速。According to the above embodiment, the high-pressure chamber 110 is used to simulate the changes in the gas-liquid interface and the sediment state during the high-pressure gas injection and brine removal process. The high-pressure chamber 110 uses a back pressure valve to set the target pressure threshold to achieve a high-pressure environment. When the pressure in the high-pressure chamber 110 reaches the set target pressure threshold, the back pressure valve automatically opens, and the brine in the chamber is discharged under the driving action of the gas pressure; during the experiment, the high-pressure chamber 110 is filled with sediment particles in layers, and the gaps between the particles are filled with brine. The pressure gauge on the inlet pipeline of the high-pressure chamber 110 monitors the injected gas pressure in real time, and the upper pressure gauge on the outlet pipeline of the brine removal pipe 130 monitors the discharged brine pressure in real time. The high-pressure chamber 110 is provided with three windows 140, upper, middle and lower, along the depth direction, so that the migration of sediment particles inside the high-pressure chamber 110 can be observed. The variable-diameter connecting pipe 120 is used to simulate the sand blockage state of sediment particles. The cross-sectional area of the variable-diameter pipe is gradually reduced to increase the brine removal flow rate, and the bottom sediment particles are carried to simulate the particle migration clogging phenomenon. The increase in the injected gas pressure reflects the occurrence of sand blockage by sediment particles, and the starting flow rate of the sediment particles is analyzed by monitoring the flow rate of the discharged brine.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，如图1所示，在所述液相注气排卤管路320上设有第一液体流量计321，在所述液相注卤排气管路330上设有与所述储水罐310连接的柱塞泵331、PLC变频器332和第二液体流量计333，所述PLC变频器332用于实时采集所述第二液体流量计333的数值，通过实时向所述柱塞泵331发送反馈信号以控制所述柱塞泵331的泵送速率，所述柱塞泵331用于提供注卤排气过程中恒定流量的高压卤水。For example, in a high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, as shown in FIG1 , a first liquid flow meter 321 is provided on the liquid-phase gas injection and brine exhaust pipeline 320, and a plunger pump 331 connected to the water storage tank 310, a PLC frequency converter 332 and a second liquid flow meter 333 are provided on the liquid-phase brine injection and exhaust pipeline 330. The PLC frequency converter 332 is used to collect the value of the second liquid flow meter 333 in real time, and to control the pumping rate of the plunger pump 331 by sending a feedback signal to the plunger pump 331 in real time. The plunger pump 331 is used to provide a constant flow of high-pressure brine during the brine injection and exhaust process.
其中，第一液体流量计321和第二液体流量计333为夹钳式流量计。The first liquid flow meter 321 and the second liquid flow meter 333 are clamp-type flow meters.
根据上述实施例，高精度计量柱塞泵331提供注卤排气过程中的高压卤水，通过与液体流量计、PLC变频器332配合，提供恒定流量的卤水，形成高压伺服控制结构；PLC变频器332用于实时采集液体流量计的流量值，通过实时向柱塞泵331发送反馈信号，以控制柱塞泵331的泵送速率，从而达到控制注卤速率的目的，实现了高压伺服控制注卤。According to the above embodiment, the high-precision metering plunger pump 331 provides high-pressure brine in the brine injection and exhaust process, and cooperates with the liquid flow meter and the PLC inverter 332 to provide brine with a constant flow rate, forming a high-pressure servo control structure; the PLC inverter 332 is used to collect the flow value of the liquid flow meter in real time, and send a feedback signal to the plunger pump 331 in real time to control the pumping rate of the plunger pump 331, thereby achieving the purpose of controlling the brine injection rate and realizing high-pressure servo control of brine injection.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，如图1所示，在所述气相注气排卤管路220上设有气瓶221和并联连接的第一气体流量控制器222，在所述气相注卤排气管路230上设有第二气体流量控制器231和与所述第二气体流量控制器231连接的放空管路232，所述第一气体流量控制器222用于控制注入的气体以给定流量注入所述高压腔室110。For example, in the high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, as shown in FIG1 , a gas cylinder 221 and a first gas flow controller 222 connected in parallel are provided on the gas-phase gas injection and brine exhaust pipeline 220, and a second gas flow controller 231 and a venting pipeline 232 connected to the second gas flow controller 231 are provided on the gas-phase brine injection and exhaust pipeline 230, and the first gas flow controller 222 is used to control the injected gas to be injected into the high-pressure chamber 110 at a given flow rate.
其中，气瓶221内储存高压氮气。The gas cylinder 221 stores high-pressure nitrogen.
根据上述实施例，氮气气瓶221提供纯净的高压氮气，用于注气。气体流量控制器是控制注入的氮气以给定流量注入高压腔室110，达到控制注气速率的目的。气液分离罐210是将注入氮气中的液体分离或者将放空氮气中的液体分离，防止影响物理模拟系统的监测精度。According to the above embodiment, the nitrogen cylinder 221 provides pure high-pressure nitrogen for gas injection. The gas flow controller controls the injected nitrogen to be injected into the high-pressure chamber 110 at a given flow rate to achieve the purpose of controlling the gas injection rate. The gas-liquid separation tank 210 separates the liquid in the injected nitrogen or separates the liquid in the vented nitrogen to prevent affecting the monitoring accuracy of the physical simulation system.
本申请的盐穴沉渣空隙储能模拟实验的高压伺服控制系统，采用电气控制气相注入系统200和液相注入系统300的阀门，可动态切换注气排卤和注卤排气两个循环过程，具体地，通过关闭气相注入系统200，打开液相注入系统300，通过高压腔室110进、出口减压阀，腔室保压后可进行注卤排气实验，不断切换这一过程，便能够实现注气排卤和注卤排气两个过程交替循环进行；本申请针对高杂质盐穴沉渣空隙储能技术研究中盐腔卤水高压环境，提供一种注气排卤和注卤排气交替循环控制的模拟实验系统，填补当前室内实验装置能够同时实现两种情形模拟的技术空白。The high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment of the present application adopts the valves of the electrically controlled gas injection system 200 and the liquid injection system 300, and can dynamically switch between the two cyclic processes of gas injection and brine expulsion and brine injection and exhaust. Specifically, by closing the gas injection system 200 and opening the liquid injection system 300, the brine injection and exhaust experiment can be carried out after the chamber is pressurized through the inlet and outlet pressure reducing valves of the high-pressure chamber 110. By continuously switching this process, the two processes of gas injection and brine expulsion and brine injection and exhaust can be realized in alternating cycles. The present application provides a simulation experiment system for alternating cyclic control of gas injection and brine expulsion and brine injection and exhaust for the high-pressure environment of salt cavern brine in the research of high-impurity salt cavern sediment void energy storage technology, filling the technical gap that the current indoor experimental equipment can realize the simulation of two situations at the same time.
例如，在一个实施例提供的所述盐穴沉渣空隙储能模拟实验的高压伺服控制系统中，在所述低压腔室122沿深度方向上安设卤水孔隙压力传感器，以监测沉渣中的卤水孔隙压力。For example, in a high-pressure servo control system of the salt cavern sediment void energy storage simulation experiment provided in one embodiment, a brine pore pressure sensor is installed in the low-pressure chamber 122 along the depth direction to monitor the brine pore pressure in the sediment.
本申请第二方面提供一种盐穴沉渣空隙储能模拟实验方法，采用上述盐穴沉渣空隙储能模拟实验的高压伺服控制系统进行实验，如图2所示，包括以下步骤：The second aspect of the present application provides a salt cavern sediment void energy storage simulation experiment method, which uses the high-voltage servo control system of the salt cavern sediment void energy storage simulation experiment to conduct an experiment, as shown in FIG2 , including the following steps:
S1准备高杂质盐矿沉渣样品；控制沉渣颗粒级配，分层堆积沉渣颗粒到高压腔室110，具体地：S1 prepares a high-impurity salt mine sediment sample; controls the sediment particle gradation, and deposits the sediment particles in layers into the high-pressure chamber 110, specifically:
打开高压腔室110顶盖，按照沉渣颗粒平均粒径从小到大，将沉渣颗粒分层堆积到高压腔室110内，直至沉渣堆积到高压腔室110总体高度的1/2～2/3；安装不同过渡尺寸的变径连通管120(例如，管径过渡尺寸分别为：DN100-DN100、DN100-DN50、DN100-DN25)，来模拟水平变径连通管120中沉渣颗粒的淤堵现象；The top cover of the high-pressure chamber 110 is opened, and the sediment particles are deposited in layers in the high-pressure chamber 110 according to the average particle size of the sediment particles from small to large, until the sediment is deposited to 1/2 to 2/3 of the overall height of the high-pressure chamber 110; different transition sizes of the variable-diameter connecting pipe 120 are installed (for example, the transition sizes of the pipe diameter are: DN100-DN100, DN100-DN50, DN100-DN25) to simulate the clogging phenomenon of the sediment particles in the horizontal variable-diameter connecting pipe 120;
S2启动液相注入系统300，将高压腔室110中充满饱和卤水，使饱和卤水能通过气液分离罐210流出，具体地：S2: Start the liquid phase injection system 300 to fill the high pressure chamber 110 with saturated brine so that the saturated brine can flow out through the gas-liquid separation tank 210. Specifically:
默认所有阀门均处于关闭状态，打开HQ01、HQ02、ZF04，启动高精度柱塞泵331，将卤水泵入高压腔室110，直到高压腔室110和排卤管130中全部充满卤水，并使卤水能通过气液分离罐210流出；By default, all valves are in the closed state, open HQ01, HQ02, and ZF04, start the high-precision plunger pump 331, and pump brine into the high-pressure chamber 110 until the high-pressure chamber 110 and the brine discharge pipe 130 are completely filled with brine, and the brine can flow out through the gas-liquid separation tank 210;
S3设置高压腔室110进出口背压阀目标阈值，启动气相注入系统200，将氮气注入到高压腔室110，建立高压卤水环境，具体地：S3 sets the target threshold of the inlet and outlet back pressure valve of the high pressure chamber 110, starts the gas phase injection system 200, injects nitrogen into the high pressure chamber 110, and establishes a high pressure brine environment. Specifically:
设置背压阀P1压力为目标设置值8MPa。对高压腔室110进出口压力表P1、P2，设置数据采样频率为1秒或2秒；对第一气体流量控制器222、第二气体流量控制器231、第一液体流量计321和第二液体流量计333，设置数据采样频率为1秒或2秒，完成各种监测仪表的准备工作；Set the back pressure valve P1 pressure to the target setting value of 8MPa. Set the data sampling frequency of the inlet and outlet pressure gauges P1 and P2 of the high pressure chamber 110 to 1 second or 2 seconds; set the data sampling frequency of the first gas flow controller 222, the second gas flow controller 231, the first liquid flow meter 321 and the second liquid flow meter 333 to 1 second or 2 seconds, and complete the preparation of various monitoring instruments;
缓慢打开氮气瓶开关K1，将氮气注入到高压腔室110，气体通过气液分离罐210,将气体中可能携带的液体排出，气体进入到高压腔室110，待高压腔室110中的压力达到设定压力数值8MPa后，背压阀P2自动打开，腔室中的卤水在气体压力的推动作用下，通过排卤管130，开关HQ01、HQ03以及第一液体流量计321，进入储水罐310，完成沉渣中注气排卤模拟实验；Slowly open the switch K1 of the nitrogen bottle to inject nitrogen into the high-pressure chamber 110. The gas passes through the gas-liquid separation tank 210 to discharge the liquid that may be carried in the gas. The gas enters the high-pressure chamber 110. After the pressure in the high-pressure chamber 110 reaches the set pressure value 8MPa, the back pressure valve P2 automatically opens. Under the driving effect of the gas pressure, the brine in the chamber passes through the brine discharge pipe 130, the switches HQ01, HQ03 and the first liquid flow meter 321, and enters the water storage tank 310, completing the simulation experiment of gas injection and brine discharge in sediment.
S4首先停止所述S3，关闭进气开关K1、QD01，关闭排卤开关HQ03，打开开关HQ02，启动高精度柱塞泵331，设置第二液体流量计333的目标数值控制柱塞泵331的注卤速率，可匀速往垂直排卤管130中注入卤水，待卤水压力达到针阀ZF04设定的目标压力值后，气体通过第二气体流量控制器231，之后进入放空管路232放空。S4 first stops the S3, closes the air intake switches K1 and QD01, closes the brine discharge switch HQ03, opens the switch HQ02, starts the high-precision plunger pump 331, sets the target value of the second liquid flow meter 333 to control the brine injection rate of the plunger pump 331, and can uniformly inject brine into the vertical brine discharge pipe 130. After the brine pressure reaches the target pressure value set by the needle valve ZF04, the gas passes through the second gas flow controller 231, and then enters the venting pipeline 232 for venting.
其中，所述S3与S4可循环往复，通过执行步骤S3和步骤S4中的开关操作功能，可进行注卤排气和注气排卤模拟实验过程的交替循环。The steps S3 and S4 can be repeated in a cycle, and by executing the switch operation functions in step S3 and step S4, the brine injection and exhaust and gas injection and exhaust simulation experiment processes can be alternately cycled.
S5关闭进气开关和进卤开关，打开放空阀和排卤开关，将高压腔室泄压，排出沉渣准备下一个实验过程，具体地，实验结束后，关闭进气开关QD01，关闭排卤开关HQ03，打开排气针阀ZF04，放出腔室中的气体，打开排卤开关LQ01排出高压腔室110中的底部剩余卤水，打开腔室顶盖更换不同的沉渣颗粒，重新装填样品进行实验。S5 turns off the air inlet switch and the brine inlet switch, opens the vent valve and the brine discharge switch, depressurizes the high-pressure chamber, discharges the sediment and prepares for the next experimental process. Specifically, after the experiment, turns off the air inlet switch QD01, turns off the brine discharge switch HQ03, opens the exhaust needle valve ZF04 to release the gas in the chamber, opens the brine discharge switch LQ01 to discharge the remaining brine at the bottom of the high-pressure chamber 110, opens the chamber top cover to replace different sediment particles, and reloads the sample for the experiment.
实验过程中的各项数据，全部被监测仪表记录；可以将实验过程中的数据全部导出，在其他绘图软件中处理，试验结束。All data during the experiment are recorded by monitoring instruments; all data during the experiment can be exported and processed in other drawing software, and the experiment is completed.
本申请的盐穴沉渣空隙储能模拟实验的高压伺服控制系统及方法，真实模拟实际盐腔中的高压卤水环境，及实现注气排卤和注卤排气的交替循环控制。The high-pressure servo control system and method of the salt cavern sediment void energy storage simulation experiment of the present application truly simulate the high-pressure brine environment in the actual salt cavity, and realize the alternating cycle control of gas injection and brine exhaust and brine injection and exhaust.
尽管本申请的实施方案已公开如上，但其并不仅仅限于说明书和实施方式中所列运用，它完全可以被适用于各种适合本申请的领域，对于熟悉本领域的人员而言，可容易地实现另外的修改，因此在不背离权利要求及等同范围所限定的一般概念下，本申请并不限于特定的细节和这里示出与描述的图例。Although the implementation scheme of the present application has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes, and it can be fully applicable to various fields suitable for the present application. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present application is not limited to the specific details and the illustrations shown and described herein.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410834443.4ACN118793481A (en) | 2024-06-26 | 2024-06-26 | High-voltage servo control system and method for simulation experiment of void energy storage in salt cavern sediment |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410834443.4ACN118793481A (en) | 2024-06-26 | 2024-06-26 | High-voltage servo control system and method for simulation experiment of void energy storage in salt cavern sediment |
| Publication Number | Publication Date |
|---|---|
| CN118793481Atrue CN118793481A (en) | 2024-10-18 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410834443.4APendingCN118793481A (en) | 2024-06-26 | 2024-06-26 | High-voltage servo control system and method for simulation experiment of void energy storage in salt cavern sediment |
| Country | Link |
|---|---|
| CN (1) | CN118793481A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119466715A (en)* | 2024-11-07 | 2025-02-18 | 中国科学院武汉岩土力学研究所 | Device and method for optimizing operating parameters of void oil storage and injection production in high-impurity salt mine sediment |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431482A (en)* | 1993-10-13 | 1995-07-11 | Sandia Corporation | Horizontal natural gas storage caverns and methods for producing same |
| CN106290125A (en)* | 2016-07-28 | 2017-01-04 | 重庆大学 | Simulation test device and test method are corroded in the storage tank farm country rock profit circulation of salt cave |
| CN112540033A (en)* | 2020-11-18 | 2021-03-23 | 中国科学院武汉岩土力学研究所 | Test device for salt deposit sediment void ratio and gas displacement brine |
| CN114658411A (en)* | 2022-03-17 | 2022-06-24 | 中国石油大学(华东) | Device and method for evaluating integrity of shaft after high-pressure oil and gas well pipe column is blocked |
| CN114991717A (en)* | 2022-05-10 | 2022-09-02 | 中国科学院武汉岩土力学研究所 | Pressure-maintaining gas-injection brine-discharging device and method for salt cavern gas storage |
| CN115434675A (en)* | 2022-09-09 | 2022-12-06 | 中国科学院武汉岩土力学研究所 | No bottom gas injection and production device and operation method of sediment void type gas storage |
| CN116413394A (en)* | 2023-04-19 | 2023-07-11 | 中国石油天然气股份有限公司 | Device and method for evaluating utilization capacity of sediment gap at bottom of salt cavern gas storage cavity |
| CN116498271A (en)* | 2023-06-01 | 2023-07-28 | 中国科学院武汉岩土力学研究所 | Oil Injection and Production Technology of Sediment Void Type Salt Cavern Oil Storage Depot |
| CN117468893A (en)* | 2022-07-20 | 2024-01-30 | 中国石油天然气股份有限公司 | Salt cave sediment gas storage gas injection row steamed experimental apparatus |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431482A (en)* | 1993-10-13 | 1995-07-11 | Sandia Corporation | Horizontal natural gas storage caverns and methods for producing same |
| CN106290125A (en)* | 2016-07-28 | 2017-01-04 | 重庆大学 | Simulation test device and test method are corroded in the storage tank farm country rock profit circulation of salt cave |
| CN112540033A (en)* | 2020-11-18 | 2021-03-23 | 中国科学院武汉岩土力学研究所 | Test device for salt deposit sediment void ratio and gas displacement brine |
| CN114658411A (en)* | 2022-03-17 | 2022-06-24 | 中国石油大学(华东) | Device and method for evaluating integrity of shaft after high-pressure oil and gas well pipe column is blocked |
| CN114991717A (en)* | 2022-05-10 | 2022-09-02 | 中国科学院武汉岩土力学研究所 | Pressure-maintaining gas-injection brine-discharging device and method for salt cavern gas storage |
| CN117468893A (en)* | 2022-07-20 | 2024-01-30 | 中国石油天然气股份有限公司 | Salt cave sediment gas storage gas injection row steamed experimental apparatus |
| CN115434675A (en)* | 2022-09-09 | 2022-12-06 | 中国科学院武汉岩土力学研究所 | No bottom gas injection and production device and operation method of sediment void type gas storage |
| CN116413394A (en)* | 2023-04-19 | 2023-07-11 | 中国石油天然气股份有限公司 | Device and method for evaluating utilization capacity of sediment gap at bottom of salt cavern gas storage cavity |
| CN116498271A (en)* | 2023-06-01 | 2023-07-28 | 中国科学院武汉岩土力学研究所 | Oil Injection and Production Technology of Sediment Void Type Salt Cavern Oil Storage Depot |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119466715A (en)* | 2024-11-07 | 2025-02-18 | 中国科学院武汉岩土力学研究所 | Device and method for optimizing operating parameters of void oil storage and injection production in high-impurity salt mine sediment |
| Publication | Publication Date | Title |
|---|---|---|
| CN112067480B (en) | Deep gas-containing coal rock pulse fracturing experimental device and experimental method | |
| CN102758531B (en) | In-pipe concrete vacuum auxiliary filling method for large concrete-filled steel tubular structure and filling system | |
| CN104712304B (en) | A kind of pulsed sand fracturing system and its control method | |
| CN103808569A (en) | High-pressure fatigue test device and test method | |
| CN204754895U (en) | Device is adopted to colliery slot of pulse water conservancy in pit - anti -reflection taking out of fracturing integration | |
| CN108507879A (en) | Microfissure triaxial stress seepage flow grouting test system and its application method | |
| CN112627783A (en) | Experimental device for improving gas injection recovery ratio through low-frequency pressure transformation | |
| CN117433977B (en) | Supercritical CO 2 Device and method for detecting in-situ permeability of shale reaction | |
| CN118777569A (en) | A salt cavern sediment void energy storage simulation experimental system and experimental method | |
| CN110145291A (en) | A volume fracturing dynamic flowback simulation device and simulation method | |
| CN118793481A (en) | High-voltage servo control system and method for simulation experiment of void energy storage in salt cavern sediment | |
| CN110441189B (en) | A device for real-time monitoring of adsorption and desorption of mixed gas | |
| CN103742119B (en) | The water-soluble high-pressure bittern feed system making chamber experiment of a kind of rock salt bank | |
| CN113391050B (en) | Experimental device and method for layering simulation of hydrate formation process | |
| CN203097791U (en) | Layered pulse pressurizing and deblocking device for oil field water injection well | |
| CN214464052U (en) | Pressure regulation and control device of packer | |
| CN104695920A (en) | Foaming agent injection system for oil field | |
| CN110082280A (en) | Coalbed Methane Productivity change modeling test device and method caused by discontinuous mining | |
| CN102305346A (en) | Low-temperature liquid recovery equipment based on automatic control | |
| CN112983408B (en) | Device and method for preventing and controlling solid phase deposition by inert gas purging for hydrate extraction under reduced pressure | |
| CN110374560A (en) | Water injection system with double water storage tanks, water injection method and storage medium | |
| CN102852871B (en) | Hydraulic system for jacking top cover in loosening reactor top cover | |
| CN117022982A (en) | Method and system for sealing carbon dioxide based on carbonate depleted reservoir | |
| CN203643302U (en) | Multi-permeability ratio type shunting acidification experimental apparatus | |
| CN115387759B (en) | Gas-electric linkage peak regulation method for salt cavern gas storage |
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |