Renewable energy and integral coal gasification combined cycle combined power generation system

Abstract

The embodiment of the utility model discloses a renewable energy source and integral coal gasification combined cycle combined power generation system, which comprises a power grid, a power generation subsystem, an electrolyzed water subsystem, a coal gas subsystem, a fuel gas subsystem and a gas turbine generator set, the power generation subsystem utilizes renewable energy sources to generate power, the water electrolysis subsystem utilizes electric energy generated by the power generation subsystem to electrolyze water so as to generate oxygen and hydrogen, and the coal gas subsystem utilizes the oxygen generated by the water electrolysis subsystem to produce coal gas. The fuel gas subsystem mixes hydrogen produced by the water electrolysis subsystem with coal gas produced by the coal gas subsystem to form fuel gas, and the gas turbine generator set is electrically connected with a power grid. According to the renewable energy source and integral coal gasification combined cycle combined power generation system, the demand quantity of fire coal can be reduced, carbon emission is remarkably reduced while certain generation power is met, and the environmental protection effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of coal gas power generation, in particular to a power generation system combining renewable energy with an integrated coal gasification combined cycle. Background Art

[0002] The integrated gasification combined cycle power generation system (IGCC) is an advanced power system that combines coal gasification technology with an efficient combined cycle. Although the integrated gasification combined cycle power generation system has a high power generation efficiency, it still relies on coal as the main fuel. The large-scale use of coal will emit a large amount of carbon dioxide, which will inevitably lead to a large amount of carbon dioxide being emitted into the atmosphere, with poor environmental protection effects. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model proposes a power generation system combining renewable energy with integrated coal gasification combined cycle with good environmental protection effect.

[0004] The power generation system combining renewable energy and integrated coal gasification combined cycle of the embodiment of the utility model comprises:

[0005] Power grid;

[0006] A power generation subsystem, the power generation subsystem is electrically connected to the power grid, and the power generation subsystem uses renewable energy to generate electricity;

[0007] a water electrolysis subsystem, wherein the water electrolysis subsystem utilizes the electrical energy generated by the power generation subsystem to electrolyze water to generate oxygen and hydrogen;

[0008] A coal gas subsystem, wherein the coal gas subsystem uses the oxygen generated by the water electrolysis subsystem to produce coal gas;

[0009] A gas subsystem and a gas turbine generator set, wherein the gas subsystem mixes the hydrogen produced by the water electrolysis subsystem with the coal gas produced by the coal gas subsystem to form fuel gas, and the gas turbine generator set generates electricity using the fuel gas, and the gas turbine generator set is electrically connected to the power grid.

[0010] The power generation system combining renewable energy with integrated coal gasification combined cycle in the embodiment of the utility model can effectively reduce the demand for coal, and thus can significantly reduce carbon emissions while meeting a certain power generation capacity, with good environmental protection effects.

[0011] In some embodiments, the gas subsystem includes:

[0012] A gas storage device, comprising a first inlet, a second inlet and a first outlet, wherein the first inlet is capable of being connected to the water electrolysis subsystem so as to store the hydrogen in the gas storage device, and the second inlet is capable of being connected to the coal gas subsystem so as to store the coal gas in the gas storage device, and the hydrogen and the coal gas are mixed in the gas storage device to form fuel gas.

[0013] In some embodiments, the gas subsystem further comprises:

[0014] A heat exchanger and a gas flow regulating device, wherein the heat exchanger has a first channel and a second channel that are independent of each other, wherein the first channel can connect the gas flow regulating device and the gas turbine generator set, and the second channel can connect the coal gas subsystem and the second inlet, and the gas in the first channel and the coal gas in the second channel can perform heat exchange so as to transfer the heat in the coal gas to the gas, the inlet of the gas flow regulating device is connected to the first outlet, and the outlet of the gas flow regulating device is connected to the first channel, and the gas flow regulating device is used to regulate the flow of the gas from the first outlet to the gas turbine generator set.

[0015] In some embodiments, the gas subsystem further includes a coal gas purification device, the inlet of the coal gas purification device is connected to the second channel, the outlet of the coal gas purification device is connected to the second inlet, and the coal gas purification device is used to purify the coal gas.

[0016] In some embodiments, the power generation subsystem includes a renewable energy power generation device, a rectifier and a power storage device, and the renewable energy power generation device is electrically connected to the power storage device through the rectifier.

[0017] In some embodiments, the water electrolysis subsystem includes a water electrolysis device, an oxygen storage device and a hydrogen storage device. The water electrolysis device uses the electrical energy provided by the electrical storage device to produce the hydrogen and the oxygen. The inlet of the hydrogen storage device is connected to the water electrolysis device, the outlet of the hydrogen storage device is connected to the first inlet, the inlet of the oxygen storage device is connected to the water electrolysis device, and the outlet of the oxygen storage device is connected to the gas subsystem.

[0018] In some embodiments, the power generation system combining renewable energy with integrated coal gasification combined cycle further comprises:

[0019] An oxygen compression device, wherein the inlet of the oxygen compression device is connected to the water electrolysis device, and the outlet of the oxygen compression device is connected to the oxygen storage device, so that the oxygen produced by the water electrolysis device is compressed and stored in the oxygen storage device;

[0020] A hydrogen compression device, wherein the inlet of the hydrogen compression device is connected to the water electrolysis device, and the outlet of the hydrogen compression device is connected to the hydrogen storage device, so that the hydrogen produced by the water electrolysis device is compressed and stored in the hydrogen storage device;

[0021] an oxygen flow regulating device, wherein the inlet of the oxygen flow regulating device is communicated with the oxygen storage device, and the outlet of the oxygen flow regulating device is communicated with the coal gas subsystem;

[0022] A hydrogen flow regulating device, wherein the inlet of the hydrogen flow regulating device is connected to the hydrogen storage device, and the outlet of the hydrogen flow regulating device is connected to the first inlet.

[0023] In some embodiments, the coal gas subsystem includes a gasifier, a coal supply device, and a gasifying agent supply device. The coal supply device is connected to the gasifier to provide coal blocks to the gasifier, and the gasifying agent supply device is connected to the gasifier to provide gasifying agent to the gasifier.

[0024] In some embodiments, the gas turbine generator set includes a gas turbine, which includes a compressor, a combustion chamber and a turbine connected in sequence, and the second passage is connected to the combustion chamber so as to pass the fuel gas into the combustion chamber.

[0025] In some embodiments, the gas turbine generator set further comprises:

[0026] A generator, the gas turbine is connected to the generator, and the generator transmits the generated electric energy to the power grid;

[0027] A waste heat boiler and a flue gas exhaust device, wherein the inlet of the waste heat boiler is connected to the turbine, and the outlet of the waste heat boiler is connected to the flue gas exhaust device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a power generation system combining renewable energy and integrated coal gasification combined cycle according to an embodiment of the utility model.

[0029] Reference numerals:

[0030] Grid 1; renewable energy power generation device 2; rectifier 3; power storage device 4; water electrolysis device 5; hydrogen compression device 6; hydrogen storage device 7; hydrogen flow regulating device 8; oxygen compression device 9; oxygen storage device 10; oxygen flow regulating device 11; coal supply device 12; gasification agent supply device 13; gasifier 14; heat exchanger 15; coal gas purification device 16; fuel gas storage device 17; regulating valve 18; first inlet 171; second inlet 172; first outlet 173; air supply equipment 19; compressor 20; combustion chamber 21; turbine 22; generator 23; waste heat boiler 24; flue gas exhaust device 25. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0032] The power generation system combining renewable energy with integrated coal gasification combined cycle in the embodiment of the utility model comprises a power grid 1, a power generation subsystem, a water electrolysis subsystem, a coal gas subsystem, a fuel gas subsystem and a gas turbine generator set.

[0033] The power generation subsystem is electrically connected to the power grid 1, and the power generation subsystem generates electricity using renewable energy.

[0034] The water electrolysis subsystem utilizes the electrical energy generated by the power generation subsystem to electrolyze water to produce oxygen and hydrogen.

[0035] The gas subsystem uses the oxygen produced by the water electrolysis subsystem to produce gas.

[0036] The gas subsystem and the gas turbine generator set, the gas subsystem mixes the hydrogen produced by the water electrolysis subsystem with the coal gas produced by the coal gas subsystem to form fuel gas, and provides it to the gas turbine generator set, and the gas turbine generator set is electrically connected to the power grid 1.

[0037] For example, the power generation subsystem generates electricity driven by wind, light or water power, part of which can be directly transmitted to the power grid 1 through the circuit, and the excess electricity is stored for use by the water electrolysis subsystem.

[0038] The oxygen generated by the water electrolysis subsystem is transported to the coal gas subsystem, which includes a gasifier 14. In the gasifier 14, the oxygen provided by the water electrolysis subsystem reacts with coal blocks and other substances to generate coal gas, and then the coal gas and the hydrogen generated by the water electrolysis subsystem enter the fuel gas subsystem and mix to become fuel gas, and the fuel gas enters the gas turbine generator set so that the gas turbine generator set generates electricity. The electricity generated by the gas turbine generator set can be transported to the power grid 1 for users to use.

[0039] The power generation system combining renewable energy with integrated coal gasification combined cycle in the embodiment of the utility model adopts renewable energy to generate electricity, which not only saves traditional energy but also reduces pollution to the environment. Furthermore, the power generation system combining renewable energy with integrated coal gasification combined cycle combines the electric energy generated by renewable energy with the water electrolysis subsystem, and produces hydrogen and oxygen by electrolyzing water. The prepared oxygen can produce coal gas after being combined with the coal gas subsystem, and the hydrogen produced by the water electrolysis can be mixed with coal gas to become fuel gas. In the power generation system combining renewable energy with integrated coal gasification combined cycle in the embodiment of the utility model, the diversified utilization of energy is achieved by combining renewable energy with fuel gas preparation technology. By adopting this method of combining renewable energy with water electrolysis technology, the power generation system combining renewable energy with integrated coal gasification combined cycle in the embodiment of the utility model can effectively reduce the demand for coal, and then can significantly reduce carbon emissions while meeting a certain power generation capacity, thereby improving environmental protection effects.

[0040] In some embodiments, Figure 1 As shown, the gas subsystem includes a gas storage device 17, and the gas storage device 17 includes a first inlet 171, a second inlet 172 and a first outlet 173. The first inlet 171 can be connected to the water electrolysis subsystem so as to store hydrogen in the gas storage device 17, and the second inlet 172 can be connected to the coal gas subsystem so as to store coal gas in the gas storage device 17. The hydrogen and coal gas are mixed in the gas storage device 17 to form fuel gas.

[0041] For example, the first inlet 171 can be connected to the hydrogen production unit of the water electrolysis subsystem to store hydrogen in the fuel gas storage device 17 , and the second inlet 172 can be connected to the first outlet 173 of the coal gas subsystem to store coal gas in the fuel gas storage device 17 .

[0042] Therefore, the power generation system combining renewable energy and integrated coal gasification combined cycle in the embodiment of the present application provides a premixing environment and temporary storage space for hydrogen and coal gas by setting up a gas storage device 17, thereby providing a stable and reliable gas supply for the operation of the gas turbine generator set.

[0043] In some embodiments, Figure 1 As shown, the gas subsystem further includes a heat exchanger 15 and a gas flow regulating device.

[0044] The heat exchanger 15 has a first channel and a second channel that are independent of each other. The first channel can be connected to the gas flow regulating device and the gas turbine generator set, and the second channel can be connected to the coal gas subsystem and the second inlet 172. The gas in the first channel and the coal gas in the second channel can perform heat exchange so as to transfer the heat in the coal gas to the gas.

[0045] The inlet of the gas flow regulating device is communicated with the first outlet 173 , and the outlet of the gas flow regulating device is communicated with the first channel. The gas flow regulating device is used to regulate the flow of the gas flowing from the first outlet 173 to the gas turbine generator set.

[0046] Therefore, in the heat exchanger 15, the heat in the coal gas can be transferred to the fuel gas, thereby increasing the temperature of the fuel gas. After the fuel gas enters the gas turbine generator set, it can be burned efficiently, thereby improving the power generation efficiency.

[0047] The gas flow regulating device can adjust the gas flow according to the needs of the gas turbine generator set. When the load needs to be increased, the amount of gas sent to the gas turbine generator set by the gas storage device 17 is increased. Otherwise, the amount of gas sent to the gas turbine generator set by the gas storage device 17 is reduced, thereby ensuring that the gas turbine generator set can operate stably and efficiently.

[0048] In some embodiments, Figure 1 As shown, the gas subsystem further includes a coal gas purification device 16, the inlet of the coal gas purification device 16 is connected to the second channel, the outlet of the coal gas purification device 16 is connected to the second inlet 172, and the coal gas purification device 16 is used to purify coal gas.

[0049] For example, the coal gas produced in the gasifier 14 first passes through the second channel for heat exchange with the fuel gas, and then passes through the coal gas purification device 16. In the coal gas purification device 16, impurities in the coal gas (such as sulfides, dust particles and other substances) are filtered out, and then enters the fuel gas storage device 17 to mix with hydrogen to form fuel gas.

[0050] Therefore, after being processed by the coal gas purification device 16, these impurities in the coal gas are effectively removed, thereby ensuring the purity of the coal gas, and further improving the purity of the fuel gas, so as to provide stable and efficient fuel for the subsequent gas turbine generator set.

[0051] In some embodiments, Figure 1 As shown, the power generation subsystem includes a renewable energy power generation device 2 , a rectifier 3 and a power storage device 4 , and the renewable energy power generation device 2 is electrically connected to the power storage device 4 via the rectifier 3 .

[0052] For example, part of the electric energy generated by the renewable energy power generation device 2 is transmitted to the power grid 1, and the other part can be transmitted to the power storage device 4 after rectification by the rectifier 3. The power storage device 4 provides electric energy for the water electrolysis subsystem. During peak power consumption, when the amount of hydrogen and oxygen required by downstream equipment such as the gasifier 14 and the gas turbine generator set is large, the output power of the electric energy storage device increases to speed up the production of hydrogen and oxygen by the water electrolysis subsystem. During low power consumption, the output power of the power storage device 4 decreases.

[0053] Therefore, the power generation system combining renewable energy and integrated coal gasification combined cycle in the embodiment of the utility model can flexibly adjust the operation of the water electrolysis subsystem according to the demand for downstream power supply by setting up the power storage device 4, thereby improving the stability of power generation.

[0054] Optionally, the power storage device 4 includes but is not limited to a lithium battery, a lead-acid battery, etc.

[0055] In some embodiments, Figure 1 As shown, the water electrolysis subsystem includes a water electrolysis device 5, an oxygen storage device 10 and a hydrogen storage device 7. The water electrolysis device 5 uses the electric energy provided by the power storage device 4 to produce hydrogen and oxygen. The inlet of the hydrogen storage device 7 is connected to the water electrolysis device 5, the outlet of the hydrogen storage device 7 is connected to the first inlet 171, the inlet of the oxygen storage device 10 is connected to the water electrolysis device 5, and the outlet of the oxygen storage device 10 is connected to the gas subsystem.

[0056] Thus, the oxygen and hydrogen generated by the electrolysis of the water electrolysis device 5 are stored in the oxygen storage device 10 and the hydrogen storage device 7 respectively for use by the downstream system.

[0057] In some embodiments, Figure 1 As shown, the power generation system combining renewable energy and integrated coal gasification combined cycle of the embodiment of the utility model further includes an oxygen compression device 9 and a hydrogen compression device 6, an oxygen flow regulating device 11 and a hydrogen flow regulating device 8, the inlet of the oxygen compression device 9 is connected to the water electrolysis device 5, and the outlet of the oxygen compression device 9 is connected to the oxygen storage device 10, so that the oxygen produced by the water electrolysis device 5 can be compressed and stored in the oxygen storage device 10.

[0058] The inlet of the hydrogen compression device 6 is connected to the water electrolysis device 5 , and the outlet of the hydrogen compression device 6 is connected to the hydrogen storage device 7 , so that the hydrogen produced by the water electrolysis device 5 can be compressed and stored in the hydrogen storage device 7 .

[0059] The inlet of the oxygen flow regulating device 11 is communicated with the oxygen storage device 10, and the outlet of the oxygen flow regulating device 11 is communicated with the coal gas subsystem.

[0060] The inlet of the hydrogen flow regulating device 8 is communicated with the hydrogen storage device 7 , and the outlet of the hydrogen flow regulating device 8 is communicated with the first inlet 171 .

[0061] Thus, the oxygen and hydrogen generated by the water electrolysis subsystem are temporarily stored in the oxygen storage device 10 and the hydrogen storage device 7 after being pressurized by the oxygen compression device 9 and the hydrogen compression device 6. The outlet of the oxygen flow regulating device 11 is connected to the gasifier 14 of the coal gas subsystem, and the oxygen flow regulating device 11 is used to regulate the flow of oxygen entering the gasifier 14. The hydrogen flow regulating device 8 is used to regulate the flow of hydrogen entering the fuel gas storage device 17.

[0062] In some embodiments, Figure 1 As shown, the coal gas subsystem includes a gasifier 14, a coal supply device 12, and a gasifying agent supply device 13. The coal supply device 12 is connected to the gasifier 14 to provide coal blocks for the gasifier 14, and the gasifying agent supply device 13 is connected to the gasifier 14 to provide gasifying agent for the gasifier 14.

[0063] For example, the gasifier 14 is provided with three inlets, one of which is connected to the outlet of the oxygen flow regulator 11, and the other two inlets are respectively connected to the coal supply device 12 and the gasification agent supply device 13. The gasification agent supply device 13 provides water vapor and the like to the gasifier 14.

[0064] In some embodiments, Figure 1 As shown, the gas turbine generator set includes a gas turbine, which includes a compressor 20, a combustion chamber 21 and a turbine 22 connected in sequence, and the second passage is connected to the combustion chamber 21 so as to pass the gas into the combustion chamber 21. The gas turbine generator set also includes an air supply device 19, which is connected to the compressor 20 so as to provide air to the compressor 20. The working process of the gas turbine is not repeated here.

[0065] In some embodiments, Figure 1 As shown, the gas turbine generator set further includes: a generator 23, a waste heat boiler 24 and a flue gas exhaust device 25. The gas turbine is connected to the generator 23, and the generator 23 transmits the generated electrical energy to the power grid 1.

[0066] The inlet of the waste heat boiler 24 is connected to the turbine 22 , and the outlet of the waste heat boiler 24 is connected to the flue gas discharge device 25 .

[0067] The compressor 20 can deliver high-pressure air to the combustion chamber 21, where the gas and high-pressure air burn to drive the turbine 22 to do work, thereby converting the thermal energy of the gas into mechanical energy, which in turn enables the generator 23 to operate and generate electrical energy. The exhaust gas of the turbine 22 is delivered to the waste heat boiler 24 for energy recovery and utilization, and the exhaust gas in the waste heat boiler 24 is discharged through the flue gas exhaust system.

[0068] Optionally, the gasifying agent supply device 13 is an air separation device or a steam generator.

[0069] Optionally, the gasifier 14 is a spouted bed gasifier 14 or a fluidized bed gasifier 14 or a fixed bed gasifier 14 .

[0070] The power generation system combining renewable energy with integrated coal gasification combined cycle in the embodiment of the utility model also has the following advantages. When the power generation system is in peak load or variable load operation, the amount of gas required by the combustion chamber 21 will change. Under normal circumstances, the gas required by the gas turbine is generated by the gasifier 14. During stable operation, the amount of gas generated by the gasifier 14 and the amount of gas consumed by the combustion chamber 21 of the gas turbine are the same. If the combustion chamber 21 of the gas turbine needs more gas, the output of gas in the gasifier 14 needs to be adjusted. However, adjusting the output of gas in the gasifier 14 requires adjusting parameters such as the amount of coal and the amount of gasifying agent supplied, which has large inertia and slow reaction speed. The gas is temporarily stored by setting a gas storage device 17, and is supplied according to the demand for gas in the combustion chamber 21 of the gas turbine. When the load is increased, the gas flow regulating device is used to increase the gas supply, and when the load is reduced, the gas flow regulating device is used to reduce the gas supply, thereby achieving rapid adjustment.

[0071] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0072] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0075] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0076] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A power generation system combining renewable energy with integrated coal gasification combined cycle, characterized in that: include: Power grid; A power generation subsystem, the power generation subsystem is electrically connected to the power grid, and the power generation subsystem uses renewable energy to generate electricity; a water electrolysis subsystem, wherein the water electrolysis subsystem utilizes the electrical energy generated by the power generation subsystem to electrolyze water to generate oxygen and hydrogen; A coal gas subsystem, wherein the coal gas subsystem uses the oxygen generated by the water electrolysis subsystem to produce coal gas; A gas subsystem and a gas turbine generator set, wherein the gas subsystem mixes the hydrogen produced by the water electrolysis subsystem with the coal gas produced by the coal gas subsystem to form fuel gas, and the gas turbine generator set generates electricity using the fuel gas, and the gas turbine generator set is electrically connected to the power grid.

2. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 1, characterized in that: The gas subsystem comprises: A gas storage device, comprising a first inlet, a second inlet and a first outlet, wherein the first inlet is capable of being connected to the water electrolysis subsystem so as to store the hydrogen in the gas storage device, and the second inlet is capable of being connected to the coal gas subsystem so as to store the coal gas in the gas storage device, and the hydrogen and the coal gas are mixed in the gas storage device to form fuel gas.

3. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 2 is characterized in that: The gas subsystem also includes: A heat exchanger and a gas flow regulating device, wherein the heat exchanger has a first channel and a second channel that are independent of each other, wherein the first channel can connect the gas flow regulating device and the gas turbine generator set, and the second channel can connect the coal gas subsystem and the second inlet, and the gas in the first channel and the coal gas in the second channel can perform heat exchange so as to transfer the heat in the coal gas to the gas, the inlet of the gas flow regulating device is connected to the first outlet, and the outlet of the gas flow regulating device is connected to the first channel, and the gas flow regulating device is used to regulate the flow of the gas from the first outlet to the gas turbine generator set.

4. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 3 is characterized in that: The gas subsystem further includes a coal gas purification device, the inlet of the coal gas purification device is communicated with the second channel, the outlet of the coal gas purification device is communicated with the second inlet, and the coal gas purification device is used to purify the coal gas.

5. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 3 or 4, characterized in that: The power generation subsystem includes a renewable energy power generation device, a rectifier and a power storage device, and the renewable energy power generation device is electrically connected to the power storage device through the rectifier.

6. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 5, characterized in that: The water electrolysis subsystem includes a water electrolysis device, an oxygen storage device and a hydrogen storage device. The water electrolysis device uses the electric energy provided by the electric storage device to produce the hydrogen and the oxygen. The inlet of the hydrogen storage device is connected to the water electrolysis device, the outlet of the hydrogen storage device is connected to the first inlet, the inlet of the oxygen storage device is connected to the water electrolysis device, and the outlet of the oxygen storage device is connected to the gas subsystem.

7. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 6, characterized in that: Also includes: An oxygen compression device, wherein the inlet of the oxygen compression device is connected to the water electrolysis device, and the outlet of the oxygen compression device is connected to the oxygen storage device, so that the oxygen produced by the water electrolysis device is compressed and stored in the oxygen storage device; A hydrogen compression device, wherein the inlet of the hydrogen compression device is connected to the water electrolysis device, and the outlet of the hydrogen compression device is connected to the hydrogen storage device, so that the hydrogen produced by the water electrolysis device is compressed and stored in the hydrogen storage device; an oxygen flow regulating device, wherein the inlet of the oxygen flow regulating device is communicated with the oxygen storage device, and the outlet of the oxygen flow regulating device is communicated with the coal gas subsystem; A hydrogen flow regulating device, wherein the inlet of the hydrogen flow regulating device is connected to the hydrogen storage device, and the outlet of the hydrogen flow regulating device is connected to the first inlet.

8. The power generation system combining renewable energy with integrated coal gasification combined cycle according to claim 6 or 7, characterized in that: The coal gas subsystem includes a gasifier, a coal supply device, and a gasifying agent supply device. The coal supply device is connected to the gasifier to provide coal blocks for the gasifier, and the gasifying agent supply device is connected to the gasifier to provide gasifying agent for the gasifier.

9. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 8, characterized in that: The gas turbine generator set includes a gas turbine, which includes a compressor, a combustion chamber and a turbine connected in sequence. The second passage is connected to the combustion chamber so as to pass the fuel gas into the combustion chamber.

10. The power generation system combining renewable energy and integrated coal gasification combined cycle according to claim 9, characterized in that: The gas turbine generator set also includes: A generator, the gas turbine is connected to the generator, and the generator transmits the generated electric energy to the power grid; A waste heat boiler and a flue gas exhaust device, wherein the inlet of the waste heat boiler is connected to the turbine, and the outlet of the waste heat boiler is connected to the flue gas exhaust device.

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