技术领域technical field
本发明涉及一种发电方法和发电系统。The invention relates to a power generation method and a power generation system.
背景技术Background technique
随着近年清洁能源迅猛发展，风能、太阳能发电作为可再生清洁能源发电在国内广泛普及，但风电、太阳能发电自身固有的间歇性问题是新能源发展制约瓶颈。随着新能源发电规模的继续扩大，这个问题显得更为迫切。结合电网用电峰谷特性，将富余的能量储存起来，用能高峰期再释放出来，是解决新能源间歇性的重点。With the rapid development of clean energy in recent years, wind power and solar power generation have been widely popularized as renewable clean energy power generation in China. However, the inherent intermittent problems of wind power and solar power generation are the bottlenecks restricting the development of new energy. As the scale of new energy power generation continues to expand, this problem becomes more urgent. Combining the peak and valley characteristics of power grid consumption, storing excess energy and releasing it during peak energy consumption is the key point to solve the intermittency of new energy.
压缩气体蓄能是较为成熟的储能技术，其中压缩气体蓄能发电作为一种大规模储能的新技术，可以有效满足新能源发电和电网调峰的蓄能发电需求，但受到建设大规模储气设施限制整体发展缓慢。燃气供给也只能新建制气或接入燃气管网，将新增较大成本投入。另外，现有压缩气体蓄能发电，利用空气储存在岩盐或岩石中的人工洞穴中，或利用天然的疏松的岩石含水层，建设大规模的储气设施成本巨大、周期长，选址要求也较高。Compressed gas energy storage is a relatively mature energy storage technology. As a new technology of large-scale energy storage, compressed gas energy storage power generation can effectively meet the energy storage power generation needs of new energy power generation and power grid peak regulation. Gas storage facilities limit the overall slow development. Gas supply can only be newly produced or connected to the gas pipeline network, which will add a large cost input. In addition, the existing compressed gas energy storage power generation uses air stored in artificial caves in rock salt or rocks, or uses natural loose rock aquifers to build large-scale gas storage facilities. The cost is huge, the period is long, and the site selection requirements are also higher.
煤炭地下气化就是将处于地下的煤炭进行有控制的燃烧，通过对煤的热作用及化学作用产生可燃气体的过程。煤炭地下气化生成的合成气可用作化工合成原料气、发电和工业燃料。煤炭地下气化炉包括进气井、可气化煤层和通道、出气井等几部分。气化炉内的煤层可燃组分在燃烧气化反应后以气体导出，不可燃组分(如金属矿物、夹矸等)和煤燃烧剩余残炭部分以灰渣的形式留置于气化原位。气化炉煤层中可燃烧气化部分被开采出后，在原煤层的顶、底板间形成新的以灰渣和冒落岩石为支撑主体的空腔和孔隙结构状密闭空间——气化燃空区(见图1)，其体积随单个气化炉规模变化通常可达数十万立方米。现有工业化地下气化发电系统，流程为：压缩机制气化剂→气化炉制气→燃气净化→锅炉燃烧→蒸汽发电。Underground coal gasification is the process of controlled combustion of underground coal to generate combustible gas through thermal and chemical effects on coal. The synthetic gas produced by underground coal gasification can be used as raw material gas for chemical synthesis, power generation and industrial fuel. Underground coal gasification furnace includes several parts such as air inlet well, gasifiable coal seam and channel, and gas outlet well. The combustible components of the coal seam in the gasifier are exported as gas after the combustion gasification reaction, and the non-combustible components (such as metal minerals, gangue, etc.) and the residual charcoal left after coal combustion are left in the gasification position in the form of ash . After the combustible gasification part of the coal seam of the gasifier is mined, a new cavity and a pore-structured closed space with ash and caving rocks as the main support are formed between the roof and floor of the original coal seam—gasification combustion air Zone (see Figure 1), its volume varies with the scale of a single gasifier, usually up to hundreds of thousands of cubic meters. The existing industrialized underground gasification power generation system, the process is: gasification agent by compression mechanism → gasification furnace gas production → gas purification → boiler combustion → steam power generation.
现有地下气化发电系统相较压缩气体蓄能发电技术可以降低成本投入，但其生产的粗燃气直接输送至地面，经燃气净化系统净化以利于后续利用系统运行。以此建设的燃气发电系统的负荷调节能力小，且燃机发电系统的启动和运行受电网负荷限制，整个生产稳定相对较差。Compared with the compressed gas energy storage power generation technology, the existing underground gasification power generation system can reduce the cost input, but the crude gas produced by it is directly transported to the ground and purified by the gas purification system to facilitate the subsequent operation of the utilization system. The load adjustment capacity of the gas-fired power generation system constructed in this way is small, and the start-up and operation of the gas-fired power generation system are limited by the load of the power grid, and the overall production stability is relatively poor.
发明内容Contents of the invention
针对相关技术中存在的问题，本发明的目的在于提供一种发电方法，以解决电力系统多余电能的大规模蓄能和调峰发电问题。In view of the problems existing in the related technologies, the object of the present invention is to provide a power generation method to solve the problem of large-scale energy storage and peak-shaving power generation of excess electric energy in the power system.
为实现上述目的，本发明提供了一种发电方法，该发电方法包括：步骤1：利用地下气化产生的燃空区构建燃气储气库，燃气储气库与地下气化炉连通；步骤2：将压缩的气化剂的一部分送入燃烧室，另一部分送入地下气化炉中气化含碳有机矿物储层制取燃气；步骤3：将在地下气化炉中制取的燃气的多余部分送入燃气储气库中储存；以及步骤4：从地下气化炉和/或燃气储气库中取出燃气送入燃烧室，以与送入燃烧室的气化剂混合燃烧产生发电所需的燃气动力。In order to achieve the above object, the present invention provides a power generation method, the power generation method comprising: Step 1: Utilize the burn-out area generated by underground gasification to build a gas storage, and the gas storage is connected to the underground gasifier; Step 2 : send a part of the compressed gasification agent into the combustion chamber, and send the other part into the underground gasification furnace to gasify carbon-containing organic mineral reservoirs to produce gas; step 3: put the gas produced in the underground gasification furnace into The excess part is sent to the gas storage for storage; and Step 4: The gas is taken out from the underground gasifier and/or the gas storage and sent to the combustion chamber to be mixed with the gasification agent sent into the combustion chamber to generate a power plant required gas power.
根据本发明的一个实施例，燃气储气库构造成完整密闭结构且其中具有注采井设施，并且燃气储气库的密封压力和运行压力与地下气化炉的密封压力和运行压力相等。According to an embodiment of the present invention, the gas storage is constructed as a complete airtight structure with injection-production well facilities therein, and the sealing pressure and operating pressure of the gas storage are equal to those of the underground gasifier.
根据本发明的一个实施例，在步骤1中：构建至少一个燃气储气库，并且使用地面管网或地下气化通道将至少一个燃气储气库与地下气化炉连通。According to an embodiment of the present invention, in step 1: at least one gas storage is constructed, and the at least one gas storage is connected with the underground gasification furnace using a ground pipe network or an underground gasification channel.
根据本发明的一个实施例，在步骤2中：在将气化剂的一部分送入燃烧室之前，经由燃气换热器与燃气进行换热和/或经过烟气换热器与烟气进行换热。According to an embodiment of the present invention, in step 2: before sending a part of the gasification agent into the combustion chamber, exchange heat with gas via a gas heat exchanger and/or exchange heat with flue gas via a flue gas heat exchanger hot.
根据本发明的一个实施例，在步骤4中：在将取出的燃气送入燃烧室之前，经由燃气净化装置对燃气进行净化。According to an embodiment of the present invention, in step 4: before sending the taken-out gas into the combustion chamber, the gas is purified by a gas purification device.
根据本发明的一个实施例，在步骤2中，通过电网系统用电低谷的多余电能、风能发电系统的电能或太阳能发电系统的电能驱动压缩机来压缩气化剂。According to an embodiment of the present invention, in step 2, the gasification agent is compressed by driving the compressor through the surplus electric energy of the grid system, the electric energy of the wind power generation system or the electric energy of the solar power generation system.
根据本发明的一个实施例，发电方法还包括步骤5：将燃气动力输送给燃气透平机，通过燃气透平机驱动发电机发电。According to an embodiment of the present invention, the power generation method further includes step 5: delivering gas power to a gas turbine, and driving a generator to generate electricity through the gas turbine.
根据本发明的一个实施例，在步骤5中：燃气透平机通过离合器带动发电机发电；或者燃气透平机直接带动压缩机压缩气化剂。According to an embodiment of the present invention, in step 5: the gas turbine drives the generator to generate electricity through the clutch; or the gas turbine directly drives the compressor to compress the gasification agent.
根据本发明的一个实施例，在气化剂的输送管路、燃气的输送管路中设置流量调节阀。According to an embodiment of the present invention, a flow regulating valve is provided in the gasification agent delivery pipeline and the fuel gas delivery pipeline.
根据本发明的一个实施例，气化剂为氧浓度大于21％的富氧气体。According to an embodiment of the present invention, the gasification agent is an oxygen-enriched gas with an oxygen concentration greater than 21%.
根据本发明的另一方面，提供一种发电系统，该发电系统包括：压缩机，具有排气口；地下气化炉，具有进气井和出气井；燃气储气库，具有储气入口和储气出口；以及燃烧室，其中，排气口与进气井和燃烧室连通，出气井与储气入口和燃烧室连通，储气出口与燃烧室连通。According to another aspect of the present invention, a power generation system is provided, which includes: a compressor with an exhaust port; an underground gasifier with an inlet well and a gas outlet well; a gas storage house with a gas storage inlet and The gas storage outlet; and the combustion chamber, wherein the exhaust port communicates with the intake well and the combustion chamber, the gas outlet well communicates with the gas storage inlet and the combustion chamber, and the gas storage outlet communicates with the combustion chamber.
根据本发明的一个实施例，在排气口与燃烧室之间设置有燃气换热器。According to an embodiment of the present invention, a gas heat exchanger is arranged between the exhaust port and the combustion chamber.
根据本发明的一个实施例，在排气口与燃气室之间还设置有烟气换热器，并且烟气换热器相对于流体流动方向位于燃气换热器的下游。According to an embodiment of the present invention, a flue gas heat exchanger is further arranged between the exhaust port and the gas chamber, and the flue gas heat exchanger is located downstream of the gas heat exchanger relative to the flow direction of the fluid.
根据本发明的一个实施例，在储气出口和/或出气井与燃烧室之间设置有燃气净化装置。According to an embodiment of the present invention, a gas purification device is provided between the gas storage outlet and/or the gas outlet well and the combustion chamber.
根据本发明的一个实施例，发电系统还包括燃气透平机和发电机，其中，燃烧室与燃气透平机连接以向燃气透平机提供燃气动力，燃气透平机与发电机连接以带动发电机发电。According to an embodiment of the present invention, the power generation system further includes a gas turbine and a generator, wherein the combustion chamber is connected to the gas turbine to provide gas power to the gas turbine, and the gas turbine is connected to the generator to drive Generators generate electricity.
根据本发明的一个实施例，燃气透平机通过离合器带动发电机发电。According to one embodiment of the present invention, the gas turbine drives the generator to generate electricity through the clutch.
根据本发明的一个实施例，在排气口与进气井之间、排气口与燃烧室之间、出气井与燃烧室之间、以及储气出口与燃烧室之间均设置有流量调节阀。According to an embodiment of the present invention, flow adjustment is provided between the exhaust port and the intake well, between the exhaust port and the combustion chamber, between the gas outlet well and the combustion chamber, and between the gas storage outlet and the combustion chamber valve.
本发明的有益技术效果在于：The beneficial technical effects of the present invention are:
本发明的发电方法将压力储能和燃气储存相结合，利用地下气化构建储气库并储存地下气化生产的燃气，实现地下气化、燃气储存、以及高效联合发电，达到储能、节能、发电的目的，从而解决了电力系统多余电能的大规模蓄能和调峰发电问题。The power generation method of the present invention combines pressure energy storage and gas storage, uses underground gasification to build a gas storage and stores the gas produced by underground gasification, realizes underground gasification, gas storage, and high-efficiency joint power generation, and achieves energy storage and energy saving , The purpose of power generation, thus solving the problem of large-scale energy storage and peak-shaving power generation of excess electric energy in the power system.
附图说明Description of drawings
为了更清楚地说明本发明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发明的一些实施例，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 technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.
图1为本发明实施例1发电方法的工艺流程图。Fig. 1 is a process flow chart of the power generation method in Embodiment 1 of the present invention.
具体实施方式detailed description
以下将结合附图，对本发明的实施例进行具体描述。需要注意的是，以下各个实施例可以任意可能的方式相互组合或部分替换。Embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings. It should be noted that the following embodiments may be combined or partially replaced in any possible manner.
如图1所示，本发明实施例1提供一种发电方法。该发电方法包括以下步骤：(1)利用地下气化产生的燃空区构建燃气储气库14，并且使燃气储气库14与地下气化炉13连通；(2)将压缩的气化剂的一部分送入燃烧室4，并且将压缩的气化剂的另一部分送入地下气化炉13中气化含碳有机矿物储层制取燃气；(3)将在地下气化炉13中制取的燃气的多余部分送入燃气储气库14中储存起来；以及(4)从地下气化炉13和燃气储气库14中取出燃气送入燃烧室4，以与送入燃烧室4的气化剂混合燃烧，产生发电所需的燃气动力。As shown in FIG. 1 , Embodiment 1 of the present invention provides a power generation method. The power generation method comprises the following steps: (1) constructing a gas storage storehouse 14 by using the burn-out area produced by underground gasification, and connecting the gas storage storehouse 14 with the underground gasifier 13; (2) using the compressed gasifying agent A part of the compressed gasification agent is sent into the combustion chamber 4, and another part of the compressed gasification agent is sent into the underground gasification furnace 13 to gasify carbon-containing organic mineral reservoirs to produce fuel gas; (3) the underground gasification furnace 13 will produce and (4) take out the gas from the underground gasification furnace 13 and the gas storage 14 and send it into the combustion chamber 4, so as to be consistent with the gas that is sent into the combustion chamber 4 The gasification agent is mixed and burned to generate the gas power required for power generation.
此处需要注意的是，在上述发电方法中，燃气可以是地下气化炉中制取的，也可以是通过其他途径获得的；此外，步骤(2)、(3)中制取燃气和储存燃气的阶段可利用电网或产能系统多余的能量进行，在用能阶段则可按照电网负荷需求，执行步骤(4)中的产能操作，进行调峰发电。It should be noted here that in the above-mentioned power generation method, the gas can be produced in the underground gasification furnace or obtained through other means; in addition, the gas produced in steps (2) and (3) and stored The stage of gas can be carried out by using the excess energy of the power grid or the production system. In the stage of energy consumption, the production capacity operation in step (4) can be performed according to the load demand of the power grid to perform peak-shaving power generation.
有益地，以上所述的发电方法将压力储能和燃气储存相结合，利用地下气化构建储气库并储存地下气化生产的燃气，实现地下气化、燃气储存、以及高效联合发电，达到储能、节能、发电的目的，从而解决了电力系统多余电能的大规模蓄能和调峰发电问题。Beneficially, the power generation method described above combines pressure energy storage and gas storage, uses underground gasification to build a gas storage and stores the gas produced by underground gasification, realizes underground gasification, gas storage, and efficient joint power generation, and achieves The purpose of energy storage, energy saving, and power generation, thus solving the problem of large-scale energy storage and peak-shaving power generation of excess electric energy in the power system.
在一个可选的实施例中，燃气储气库14构造成完整密闭结构，并且在燃气储气库14中设置有注采井设施；优选地，燃气储气库14的密封压力和运行压力与地下气化炉13的密封压力和运行压力相等。In an optional embodiment, the gas storage 14 is configured as a complete airtight structure, and injection-production well facilities are arranged in the gas storage 14; preferably, the sealing pressure and operating pressure of the gas storage 14 are the same as The sealing pressure of the underground gasifier 13 is equal to the operating pressure.
在上述实施例中，使用地下气化产生的燃空区构建燃气储气库14具有诸多益处：首先，燃空区通常在120米以深并且被灰渣和岩石部分充填而具有良好的密闭性，在经充分燃烧和气化开采置换处理后基本无可燃物且周围围岩存在一定余热，用于燃气或气化剂储存是安全可行的；此外，地下气化炉配套建设有完整的气化剂和燃气管网，并且各管网承压能够达到1.0—4.0MPa甚至更高，其储气能够满足压缩气体蓄能发电和气化炉生产运行要求，因此在地下储气库建设时能充分利用地下气化炉相关设施，可节省大量投资费用，例如，可利用注采井作为燃气储气库14的储气入口和储气出口；进一步地，单炉气化煤炭形成的燃空区空间通常较大，因此其储存量大且能多炉形成连片，利于后续生产调节。In the above-mentioned embodiment, there are many benefits in using the burnout area produced by underground gasification to construct the gas storage 14: first, the burnout area is usually at a depth of 120 meters and is partially filled with ash and rocks so that it has good airtightness, After full combustion and gasification mining replacement treatment, there is basically no combustibles and there is a certain amount of waste heat in the surrounding rocks, so it is safe and feasible to store gas or gasification agent; in addition, the supporting construction of underground gasification furnace has a complete gasification agent and Gas pipeline network, and the pressure of each pipeline network can reach 1.0-4.0MPa or even higher, and its gas storage can meet the requirements of compressed gas energy storage power generation and gasifier production and operation, so the underground gas can be fully utilized in the construction of underground gas storage. Furnace-related facilities can save a lot of investment costs. For example, the injection-production well can be used as the gas storage inlet and gas storage outlet of the gas storage 14; furthermore, the space of the burn-out zone formed by the gasification of coal in a single furnace is usually large , so it has a large storage capacity and can form continuous sheets in multiple furnaces, which is beneficial to subsequent production adjustments.
根据本发明的另一个可选的实施例中，在步骤1中构建至少一个燃气储气库14；例如，在一个可能的实施例中，构建多个燃气储气库14，并且使用地面管网或地下气化通道将每个燃气储气库14与地下气化炉13连通，以满足燃气的更大储量的需求。According to another optional embodiment of the present invention, at least one gas storage 14 is constructed in step 1; for example, in a possible embodiment, multiple gas storages 14 are constructed, and the ground pipeline network is used Or the underground gasification passage connects each gas storage 14 with the underground gasification furnace 13, so as to meet the demand for larger storage of gas.
如图1所示，在本发明实施例1的步骤2中，在将压缩的气化剂的一部分送入燃烧室4之前，使该部分压缩气体分别通过燃气换热器6和烟气换热器7，其中，燃气换热器6的作用是使该部分压缩气体与燃气换热以回收余热，同样地，烟气换热器7的作用是使该部分与烟气换热回收余热。在上述实施例中，整个发电系统可充分利用气轮机烟气和地下气化炉13燃气余热给压缩气体升温，较单一压缩空气蓄能发电和地下气化发电有更高的系统综合热效率。As shown in Figure 1, in step 2 of Embodiment 1 of the present invention, before a part of the compressed gasification agent is sent into the combustion chamber 4, the part of the compressed gas is passed through the gas heat exchanger 6 to exchange heat with the flue gas respectively. 7, wherein the function of the gas heat exchanger 6 is to exchange heat between this part of the compressed gas and the gas to recover waste heat, and similarly, the function of the flue gas heat exchanger 7 is to exchange heat between this part and the flue gas to recover waste heat. In the above embodiments, the entire power generation system can make full use of the gas turbine flue gas and the waste heat of the underground gasification furnace 13 to raise the temperature of the compressed gas, which has a higher overall thermal efficiency of the system than single compressed air energy storage power generation and underground gasification power generation.
还如图1所示，在本发明实施例1的步骤4中，在将取出的燃气送入燃烧室4之前，使燃气经由燃气净化装置8对燃气进行净化；示例性地，燃气净化装置8包括脱水装置、脱焦油、粗脱硫等装置，其主要作用是分离粗燃气中的焦油、水、H2S等杂质，从而获得净燃气以作为燃料。Also as shown in Figure 1, in step 4 of Embodiment 1 of the present invention, before the gas taken out is sent into the combustion chamber 4, the gas is purified by a gas purification device 8; for example, the gas purification device 8 Including dehydration device, detarring, crude desulfurization and other devices, its main function is to separate tar, water, H2 S and other impurities in crude gas, so as to obtain clean gas as fuel.
根据本发明的一个可选的实施例，如图1所示，在步骤2中，可使用压缩机1压缩气化剂，并且可通过电网系统用电低谷的多余电能、风能或太阳能系统作动力来驱动压缩机1。According to an optional embodiment of the present invention, as shown in Fig. 1, in step 2, the compressor 1 can be used to compress the gasification agent, and the excess electric energy, wind energy or solar system can be used as power through the power grid system to drive compressor 1.
另外，在上述本发明实施例1中，如图1所示，还可包括步骤5：将燃气动力输送给燃气透平机5，通过燃气透平机5驱动发电机3发电。并且在一些可选的实施例中，燃气透平机5可通过离合器2带动发电机3发电；或者燃气透平机5可直接带动压缩机1压缩气化剂，即，当发电系统向电网供电负荷降低时，可通过调节离合器2直接驱动压缩机1进行气化剂压缩，用于地下气化生产燃气储能。In addition, in the first embodiment of the present invention, as shown in FIG. 1 , step 5 may also be included: the gas power is transmitted to the gas turbine 5, and the gas turbine 5 is used to drive the generator 3 to generate electricity. And in some optional embodiments, the gas turbine 5 can drive the generator 3 to generate electricity through the clutch 2; or the gas turbine 5 can directly drive the compressor 1 to compress the gasifying agent, that is, when the power generation system supplies power to the grid When the load decreases, the compressor 1 can be directly driven by adjusting the clutch 2 to compress the gasification agent, which is used for underground gasification to produce gas energy storage.
另外优选地，根据本发明的一个实施例，可在气化剂的输送管路设置流量调节阀9和12、在燃气的输送管路中设置流量调节阀10和11，以控制各个管路中的流体输送流量。In addition, preferably, according to an embodiment of the present invention, flow regulating valves 9 and 12 can be set in the delivery pipeline of gasification agent, and flow regulating valves 10 and 11 can be set in the delivery pipeline of gas, so as to control the fluid delivery flow.
此外，在本发明的上述各个实施例以及其他可能的实施例中，气化剂为氧浓度大于21％的富氧气体，例如氧浓度大于21％的氧气、氮气、二氧化碳及其他惰性气体中两种或多种的混合物。In addition, in the above-mentioned embodiments and other possible embodiments of the present invention, the gasification agent is an oxygen-rich gas with an oxygen concentration greater than 21%, such as two of oxygen, nitrogen, carbon dioxide and other inert gases with an oxygen concentration greater than 21%. a mixture of one or more.
另一方面，参照图1，本发明还提供一种发电系统。该发电系统包括：压缩机1，具有排气口；地下气化炉13，具有进气井和出气井；燃气储气库14，具有储气入口和储气出口；以及燃烧室4，其中，压缩机1的排气口与地下气化炉13的进气井和燃烧室4连通，以向地下气化炉13和燃烧室4输送气化剂；地下气化炉13的出气井与燃气储气库14的储气入口连通以将多余燃气输送到燃气储气库14中储存起来，并且地下气化炉13的出气井还与燃烧室4连通，以向燃烧室4供应燃气用于燃烧发电；此外，燃气储气库14的储气出口与燃烧室4连通，以在用电高峰时向燃烧室4提供储存的燃气。On the other hand, referring to FIG. 1 , the present invention also provides a power generation system. The power generation system includes: a compressor 1 with an exhaust port; an underground gasifier 13 with an inlet well and an outlet well; a gas storage 14 with a gas storage inlet and a gas storage outlet; and a combustion chamber 4, wherein, The exhaust port of the compressor 1 communicates with the intake well of the underground gasifier 13 and the combustion chamber 4, so as to deliver the gasifying agent to the underground gasifier 13 and the combustion chamber 4; The gas storage inlet of the gas storage 14 is connected to transport excess gas to the gas storage 14 for storage, and the gas outlet well of the underground gasification furnace 13 is also connected to the combustion chamber 4 to supply gas to the combustion chamber 4 for combustion and power generation ; In addition, the gas storage outlet of the gas storage 14 communicates with the combustion chamber 4 to provide stored gas to the combustion chamber 4 during peak hours of electricity consumption.
根据本发明的可选的实施例，在压缩机1的排气口与燃烧室4之间设置有燃气换热器6，燃气换热器6的作用是使气化剂压缩气体与燃气换热以回收余热同时对燃气进行降温；在本发明的一些可选的实施例中，在压缩机1的排气口与燃气室4之间还设置有烟气换热器7，同样地，烟气换热器7的作用是使气化剂压缩气体与烟气换热回收余热同时对烟气进行降温；并且烟气换热器7相对于气化剂压缩气体的流动方向位于燃气换热器6的下游，这是因为与燃气相比，烟气的温度更高，将烟气换热器7设置在燃气换热器6的下游，可以使气化剂首先与相对低温的燃气换热升温，然后再与相对高温的烟气换热而再次升温，从而阶梯地利用整个系统的热量，显著地提高了热量利用效率，并且还能够实现对燃气和烟气进行降温的有益效果。According to an optional embodiment of the present invention, a gas heat exchanger 6 is provided between the exhaust port of the compressor 1 and the combustion chamber 4, and the function of the gas heat exchanger 6 is to exchange heat between the gasification agent compressed gas and the gas To recover the waste heat and lower the temperature of the gas; in some optional embodiments of the present invention, a flue gas heat exchanger 7 is also arranged between the exhaust port of the compressor 1 and the gas chamber 4. Similarly, the flue gas The function of the heat exchanger 7 is to exchange heat between the compressed gas of the gasification agent and the flue gas to recover the waste heat while cooling the flue gas; This is because the temperature of the flue gas is higher than that of the gas, and the flue gas heat exchanger 7 is arranged downstream of the gas heat exchanger 6, so that the gasification agent can first exchange heat with the relatively low temperature gas to raise the temperature. Then it exchanges heat with relatively high-temperature flue gas to raise the temperature again, so that the heat of the entire system is utilized stepwise, which significantly improves the heat utilization efficiency, and can also achieve the beneficial effect of cooling gas and flue gas.
另外地，参照图1，在一个可能的实施例中，在燃气储气库14的储气出口和/或地下气化炉13的出气井与燃烧室4之间设置有燃气净化装置，用于将制取和/或储存的燃气净化成净燃气用作燃料发电。In addition, referring to FIG. 1 , in a possible embodiment, a gas purification device is provided between the gas storage outlet of the gas storage 14 and/or the gas outlet well of the underground gasifier 13 and the combustion chamber 4 for Purify the produced and/or stored gas into clean gas and use it as fuel to generate electricity.
根据本发明的可选实施例，如图1所示，发电系统还包括燃气透平机5和发电机3，其中，燃烧室4与燃气透平机5连接以向燃气透平机5提供燃气动力，并且燃气透平机5与发电机3连接以带动发电机3发电；在一些可选的实施例中，燃气透平机5可通过离合器2带动发电机3发电。According to an optional embodiment of the present invention, as shown in Figure 1, the power generation system further includes a gas turbine 5 and a generator 3, wherein the combustion chamber 4 is connected to the gas turbine 5 to provide gas turbine 5 power, and the gas turbine 5 is connected to the generator 3 to drive the generator 3 to generate electricity; in some optional embodiments, the gas turbine 5 can drive the generator 3 to generate electricity through the clutch 2.
参照图1，根据本发明的一些优选的实施例，在压缩机1的排气口与地下气化炉13的进气井之间设置有流量调节阀9、在压缩机1的排气口与燃烧室4之间设置有流量调节阀12、在地下气化炉13的出气井与燃烧室4之间设置有流量调节阀10、以及在燃气储气库14的储气出口与燃烧室4之间设置有流量调节阀11，以上各流量调节阀用于控制各个管路的流体流量。Referring to Fig. 1, according to some preferred embodiments of the present invention, a flow regulating valve 9 is arranged between the exhaust port of the compressor 1 and the intake shaft of the underground gasifier 13, and a flow regulating valve 9 is arranged between the exhaust port of the compressor 1 and the A flow regulating valve 12 is provided between the combustion chambers 4, a flow regulating valve 10 is provided between the gas outlet well of the underground gasifier 13 and the combustion chamber 4, and a flow regulating valve 10 is provided between the gas storage outlet of the gas storage 14 and the combustion chamber 4. A flow regulating valve 11 is arranged between them, and each of the above flow regulating valves is used to control the fluid flow of each pipeline.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
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| CN201710183757.2ACN106988884A (en) | 2017-03-24 | 2017-03-24 | Electricity-generating method and electricity generation system |
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| CN201710183757.2ACN106988884A (en) | 2017-03-24 | 2017-03-24 | Electricity-generating method and electricity generation system |
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