Compressed air solidification energy storage power generation system and use method thereof

Abstract

The invention discloses a compressed air solidification energy storage power generation system and a using method thereof. The compressed air solidification energy storage power generation system comprises a multi-stage air compressor, a cooler, a cooling dryer, a high-temperature generator, a gas storage tank filled with solidification gas storage materials, a heat exchanger, a multi-stage expansion machine, a low-temperature storage tank, a high-temperature storage tank and a gas and liquid connecting pipeline which are sequentially connected. The working state of the system is adjusted by adjusting each valve; in the gas storage stage, the multi-stage air compressor compresses air, the temperature of high-pressure gas is reduced through the cooler, and then the high-pressure gas is stored in a gas storage tank; and in the deflation power generation stage, the gas pressure is increased by heating the gas storage tank, and high-pressure gas drives the expansion machine and the power generator to generate power. Waste heat in the gas storage and power generation process is fully utilized, high-efficiency air compression storage can be achieved, and the energy consumption of compressed air is effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of renewable energy storage, and in particular relates to a compressed air solidification energy storage power generation system and a use method thereof. Background Art

[0002] Since power generation from renewable resources such as wind and light is highly uncontrollable, in order to maintain a balance between power suppliers and users in the power grid and ensure the safety of the grid, it is necessary to introduce energy storage as a flexible adjustment resource. Therefore, energy storage is an essential infrastructure for the development of new energy.

[0003] Compressed air energy storage can use the electricity from new energy sources such as solar energy and wind energy to store compressed air, and release compressed air to drive steam turbines to generate electricity during peak load periods of the power grid. It has the advantages of large energy storage capacity, long energy storage cycle, and low specific investment, and is considered to be one of the large-scale energy storage technologies with the broadest development prospects.

[0004] The gas compression process consumes a lot of energy, and the use of high-pressure gas storage will result in low compressed air energy storage efficiency. At the same time, the insufficient utilization of waste heat in the gas storage and power generation process also affects the overall energy storage efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a compressed air solidification energy storage power generation system and a method of using the same, which can fully utilize the waste heat in the gas storage and power generation process, realize high-efficiency air compression storage, and effectively reduce the energy consumption of compressed air.

[0006] To achieve the above-mentioned purpose, the present invention provides a compressed air solidification energy storage power generation system, including an air storage tank and an air filter, the air storage tank is provided with an air inlet interface, an air outlet interface, a heat exchange liquid interface 1, and a heat exchange liquid interface 2, the air storage tank is provided with a ventilation pipeline and a heat exchange pipeline, the ventilation pipeline is provided with a plurality of openings, the two ends of the ventilation pipeline are respectively connected to the air inlet interface and the air outlet interface through an expansion and compression device, the two ends of the heat exchange pipeline are respectively connected to the heat exchange liquid interface 1 and the heat exchange liquid interface 2, and the air storage tank is filled with solidified gas storage material;

[0007] The air filter is connected to the air inlet interface of the air storage tank through the multi-stage air compressor, the cooling dryer, and the air circuit valve 4 in sequence. The front end of the cooling dryer is connected to the air circuit valve 2, and the air circuit valve 2 and the cooling dryer are connected in parallel with the air circuit valve 1.

[0008] A cooler is connected to the rear end of each stage of the air compressor;

[0009] All coolers and gas storage tanks are connected to low-temperature storage tanks and high-temperature storage tanks to form a heat exchange cooling loop: the low-temperature heat exchange liquid flowing out of the outlet of the low-temperature storage tank is simultaneously sent to all coolers and gas storage tanks and then enters the high-temperature storage tank;

[0010] The low-temperature heat exchange liquid of the low-temperature storage tank enters the gas storage tank from the heat exchange liquid interface 1, flows through the heat exchange pipe, flows out of the gas storage tank through the heat exchange liquid interface 2, and finally enters the high-temperature storage tank. The outlet of the low-temperature storage tank is connected to the heat exchange liquid interface 1 with a liquid circuit valve 2, and the inlet of the high-temperature storage tank is connected to the heat exchange liquid interface 2 with a liquid circuit valve 1;

[0011] The gas outlet interface of the gas storage tank is connected to a multi-stage expander, and the front end of each stage of the expander is connected to a heat exchanger;

[0012] All heat exchangers and gas storage tanks are connected to low-temperature storage tanks and high-temperature storage tanks to form a heat exchange and heating circuit: the high-temperature heat exchange liquid flowing out of the outlet of the high-temperature storage tank is simultaneously sent to all heat exchangers and gas storage tanks and then enters the low-temperature storage tank;

[0013] The high-temperature heat exchange fluid of the high-temperature storage tank enters the gas storage tank from the heat exchange fluid interface 2, flows through the heat exchange pipe, flows out of the gas storage tank through the heat exchange fluid interface 1, and finally enters the low-temperature storage tank. A liquid circuit valve 3 is connected between the outlet of the high-temperature storage tank and the heat exchange fluid interface 2, and a liquid circuit valve 4 is connected between the inlet of the low-temperature storage tank and the heat exchange fluid interface 1.

[0014] As a further solution of the present invention: gas circuit valve four is connected in parallel with gas circuit valve three and the high-temperature generator, a flexible inflatable bag is detachably connected to the middle part of the ventilation pipe, a branch is provided between the gas storage tank and the heat exchanger, and gas circuit valve five is connected to the branch.

[0015] As a further solution of the present invention: the ventilation duct is a cylindrical tube body, and the openings are unevenly distributed on the cylindrical tube body, and the closer to the air outlet interface, the denser the openings.

[0016] As a further solution of the present invention: all coolers and cooling dryers are connected to condensed water tanks.

[0017] The present invention also provides a method for using a compressed air solidification energy storage power generation system, comprising:

[0018] Gas storage stage:

[0019] The air in the atmosphere is filtered through an air filter, and the filtered gas is compressed by a multi-stage air compressor, the temperature will rise and release heat, open the liquid valve 1 and liquid valve 2, close the liquid valve 3 and liquid valve 4, the low-temperature heat exchange fluid in the low-temperature storage tank flows through the cooler and then flows into the high-temperature storage tank, and the heat generated in the gas compression process is recovered; the low-temperature heat exchange fluid in the low-temperature storage tank flows through the gas storage tank and then to the high-temperature storage tank, and the low-temperature heat exchange fluid is used to cool the gas storage tank, thereby increasing the solidification reserve and recovering the heat generated in the solidification process;

[0020] During summer operation, the air is high-temperature and high-humidity gas. Open gas circuit valve 2 and gas circuit valve 4, close gas circuit valve 1 and gas circuit valve 3, and the high-pressure gas compressed by the multi-stage compressor is cooled and dried by the cooling dryer before entering the gas storage tank through the air inlet interface;

[0021] During winter operation, the air is low in temperature and humidity. Open gas valve 1 and gas valve 4, close gas valve 2 and gas valve 3, and the high-pressure gas compressed by the multi-stage compressor directly enters the gas storage tank through the air inlet interface.

[0022] Degassing power generation stage: During the process of compressed air expansion and work, the temperature will drop and need to absorb heat. Open liquid valve three and liquid valve four, close liquid valve one and liquid valve two, and the high-temperature heat exchange fluid in the high-temperature storage tank flows through the gas storage tank to the low-temperature storage tank. The high-temperature heat exchange fluid heats up the gas storage tank to increase the gas expansion energy; the high-temperature heat exchange fluid in the high-temperature storage tank flows through the heat exchanger to heat it, further increasing the gas expansion energy; then the cooled high-temperature heat exchange fluid flows into the low-temperature storage tank; the high-pressure and high-temperature gas drives the expander to do work, driving the generator to generate electricity.

[0023] Furthermore, after the system has been operating for a certain period of time for gas storage and power generation, the third gas circuit valve is opened, the fourth gas circuit valve is closed, and the temperature of the dry gas is increased by the high-temperature generator; a flexible inflatable bag is inserted into the ventilation duct, and the openings in the middle area of ​​the ventilation duct are closed, leaving only the upper and lower ventilation holes; the dry gas fully flows through the solidified gas storage material in the gas tank through the air inlet interface of the gas storage tank and the ventilation duct, and then the dry gas carries moisture and flows out of the gas tank from the gas outlet interface of the gas storage tank; the fifth gas circuit valve is opened, and the high-temperature dry gas passes through the gas storage tank, dries the solidified gas storage material, and is directly discharged into the atmosphere.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention can significantly improve the gas storage ratio and achieve lower storage pressure by filling the gas storage tank with solidified gas storage material without reducing the storage volume, thereby achieving compressed air energy storage with smaller size and lower pressure, and significantly improving the energy storage density.

[0026] 2. The present invention collects the heat from the solidification gas storage process by switching the heat exchange operation mode and uses it to drive the gas expander to generate electricity, thereby improving the efficiency of thermal energy utilization, making full use of the waste heat in the gas storage and power generation process, and being able to achieve high-efficiency air compression storage, effectively reducing the energy consumption of compressed air.

[0027] 3. The present invention adjusts the use of the cooling dryer according to the temperature and humidity of the gas in the environment. The cooling dryer is turned on in a high-temperature and high-humidity environment, and is turned off in a low-temperature and low-humidity environment, thereby saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the compressed air solidification energy storage power generation system of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the gas storage tank of the present invention.

[0030] Figure 3 It is a schematic diagram of the structure of a flexible inflatable bag filled in a ventilation duct of the present invention.

[0031] In the figure: 1, air filter, 2, air compressor, 3, condensate tank, 4, cooler, 5, gas circuit valve 1, 6, gas circuit valve 2, 7, cooling dryer, 8, gas circuit valve 3, 9, gas circuit valve 4, 10, high temperature generator, 11, gas storage tank, 12, gas circuit valve 5, 13, heat exchanger, 14, expander, 15, liquid circuit valve 1, 16, liquid circuit valve 2, 17, liquid circuit valve 3, 18, liquid circuit valve 4, 19, high temperature storage tank, 20, low temperature storage tank, 21, solidified gas storage material, 22, expansion and compression device, 23, ventilation pipe, 24, heat exchange pipe, 25, flexible inflatable bag;

[0032] 11.1, air inlet interface, 11.2, air outlet interface, 11.3, heat exchange liquid interface 1, 11.4, heat exchange liquid interface 2. DETAILED DESCRIPTION

[0033] The present invention will be further described below by way of examples.

[0034] like Figure 1 and Figure 2 As shown, a compressed air solidification energy storage power generation system includes an air tank 11 and an air filter 1. The air tank 11 is provided with an air inlet interface 11.1, an air outlet interface 11.2, a heat exchange liquid interface 1 11.3, and a heat exchange liquid interface 2 11.4. A ventilation pipe 23 and a heat exchange pipe 24 are provided in the air tank 11. The ventilation pipe 23 is provided with a plurality of openings. The two ends of the ventilation pipe 23 are respectively connected to the air inlet interface 11.1 and the air outlet interface 11.2 through an expansion and compression device 22. The two ends of the heat exchange pipe 24 are respectively connected to the heat exchange liquid interface 1 11.3 and the heat exchange liquid interface 2 11.4. The air tank 11 is filled with solidified air storage material 21; the solid air storage material is granular and is fully and evenly filled in the air tank 11; the interior of the expansion and compression device 22 is a high-compression elastic material, which can be an elastic rubber wrapped with a spring, and can adjust the expansion amount according to the filled gap to ensure that the tank body is filled tightly.

[0035] The air filter 1 is connected to the air inlet interface 11.1 of the air storage tank 11 through the multi-stage air compressor 2, the cooling dryer 7, and the air circuit valve 4 9 in sequence. The front end of the cooling dryer 7 is connected to the air circuit valve 2 6. The air circuit valve 2 6 and the cooling dryer 7 are connected in parallel with the air circuit valve 1 5.

[0036] The rear end of each stage of the air compressor 2 is connected to a cooler 4; in the gas storage stage, the heat generated by the air compression can be heat exchanged, and the waste heat can be recovered for use in the power generation stage, thereby reducing energy waste;

[0037] All coolers 4 and gas storage tanks 11 are connected to low-temperature storage tanks 20 and high-temperature storage tanks 19 to form a heat exchange cooling loop: the low-temperature heat exchange liquid flowing out of the outlet of the low-temperature storage tank 20 is simultaneously sent to all coolers 4 and gas storage tanks 11 and then enters the high-temperature storage tank 19;

[0038] The low-temperature heat exchange liquid of the low-temperature storage tank 20 enters the gas storage tank 11 from the heat exchange liquid interface 11.3, flows through the heat exchange pipe 24, flows out of the gas storage tank 11 through the heat exchange liquid interface 11.4, and finally enters the high-temperature storage tank 19. A liquid circuit valve 16 is connected between the outlet of the low-temperature storage tank 20 and the heat exchange liquid interface 11.3, and a liquid circuit valve 15 is connected between the inlet of the high-temperature storage tank 19 and the heat exchange liquid interface 11.4.

[0039] The gas outlet interface 11.2 of the gas storage tank 11 is connected to a multi-stage expander 14, and the front end of each stage of the expander 14 is connected to a heat exchanger 13;

[0040] All heat exchangers 13 and gas storage tanks 11 are connected to low-temperature storage tanks 20 and high-temperature storage tanks 19 to form a heat exchange and heating circuit: the high-temperature heat exchange liquid flowing out of the outlet of the high-temperature storage tank 19 is simultaneously sent to all heat exchangers 13 and gas storage tanks 11 and then enters the low-temperature storage tank 20; the low-temperature heat exchange liquid is formed and used in the next gas storage stage;

[0041] The high-temperature heat exchange liquid of the high-temperature storage tank 19 enters the gas storage tank 11 from the heat exchange liquid interface 11.4, flows through the heat exchange pipe 24, flows out of the gas storage tank 11 through the heat exchange liquid interface 11.3, and finally enters the low-temperature storage tank 20. A liquid circuit valve 3 17 is connected between the outlet of the high-temperature storage tank 19 and the heat exchange liquid interface 11.4, and a liquid circuit valve 4 18 is connected between the inlet of the low-temperature storage tank 20 and the heat exchange liquid interface 11.3.

[0042] By adjusting the opening and closing switches of each valve, the different working states of the system can be adjusted.

[0043] After being used for a period of time, the solidified gas storage material 21 will absorb a certain amount of water vapor, thereby affecting its gas storage performance. In order to ensure its gas storage performance, further, such as Figures 1 to 3As shown, the gas circuit valve four 9 is connected in parallel with the gas circuit valve three 8 and the high-temperature generator 10. A flexible air bag 25 is detachably connected to the middle part of the ventilation pipe 23. A branch is provided between the gas storage tank 11 and the heat exchanger 13. The gas circuit valve five 12 is connected to the branch. The high-temperature generator 10 is used to form high-temperature dry gas, and the flexible air bag 25 is used to block the ventilation pipe 23, so that the high-temperature dry gas enters the gas storage tank 11 through the opening at one end of the flexible air bag 25 on the ventilation pipe 23 to dry the solidified gas storage material 21, and takes away the moisture and is discharged from the gas storage tank 11 through the opening at the other end of the flexible air bag 25 on the ventilation pipe 23.

[0044] In order to fully utilize the ventilation pipe 23 for gas storage, the ventilation pipe 23 is a cylindrical tube body, and the openings are unevenly distributed on the cylindrical tube body, and the closer to the gas outlet interface 11.2, the denser the openings are. It is ensured that the compressed gas flows from the ventilation pipe 23 to the solidified gas storage material 21 outside the ventilation pipe 23 at the same flow rate, so as to achieve the same solidification rate in the horizontal direction.

[0045] Furthermore, all coolers 4 and cooling dryers 7 are connected to the condensed water tank 3 .

[0046] A method for using a compressed air solidification energy storage power generation system, comprising:

[0047] Gas storage stage:

[0048] The air in the atmosphere is filtered by the air filter 1 to remove dust, oil, rust, moisture and other substances in the air. The filtered gas is compressed by the multi-stage air compressor 2, the temperature will rise and release heat, open the liquid valve 15 and the liquid valve 2 16, close the liquid valve 3 17 and the liquid valve 4 18, the low-temperature heat exchange liquid of the low-temperature storage tank 20 flows through the cooler 4 and then flows into the high-temperature storage tank 19 to recover the heat generated in the gas compression process; the low-temperature heat exchange liquid of the low-temperature storage tank 20 flows through the gas storage tank 11 and then flows to the high-temperature storage tank 19, and the low-temperature heat exchange liquid cools the gas storage tank 11 to increase the solidification reserve and recover the heat generated in the solidification process;

[0049] During summer operation, the air is high-temperature and high-humidity gas. Open the gas circuit valve 2 6 and the gas circuit valve 4 9, close the gas circuit valve 1 5 and the gas circuit valve 3 8, and the high-pressure gas compressed by the multi-stage compressor is cooled and dried by the cooling dryer 7 and then enters the gas storage tank 11 through the air inlet interface 11.1;

[0050] During winter operation, the air is low in temperature and humidity. Open gas circuit valve 1 5 and gas circuit valve 4 9, close gas circuit valve 2 6 and gas circuit valve 3 8, and the high-pressure gas compressed by the multi-stage compressor directly enters the gas storage tank 11 through the air inlet interface 11.1.

[0051] Degassing power generation stage: During the process of compressed air expansion and work, the temperature will drop and need to absorb heat. Open liquid circuit valve three 17 and liquid circuit valve four 18, close liquid circuit valve one 15 and liquid circuit valve two 16, and the high-temperature heat exchange fluid of the high-temperature storage tank 19 flows through the gas storage tank 11 to the low-temperature storage tank 20. The high-temperature heat exchange fluid is used to increase the temperature in the gas storage tank 11 to increase the gas expansion energy; the high-temperature heat exchange fluid of the high-temperature storage tank 19 flows through the heat exchanger 13 to heat it, further increasing the gas expansion energy; then the cooled high-temperature heat exchange fluid flows into the low-temperature storage tank 20; the high-pressure and high-temperature gas drives the expander 14 to work, driving the generator to generate electricity.

[0052] Furthermore, after the gas storage and power generation of the system of the present invention has been running for a certain period of time (about one month), a certain amount of moisture will accumulate in the solidified gas storage material 21, which will affect the gas storage efficiency, and the inside of the gas storage tank 11 needs to be dried.

[0053] Open the gas circuit valve three 8, close the gas circuit valve four 9, and increase the temperature of the dry gas through the high-temperature generator 10; insert the flexible inflatable bag 25 into the ventilation pipe 23, close the opening in the middle area of ​​the ventilation pipe 23, and only retain the upper and lower ventilation holes; the dry gas fully flows through the air inlet interface 11.1 of the gas storage tank 11 and the ventilation pipe 23 to solidify the gas storage material 21 in the gas storage tank 11, and then the dry gas carries moisture and flows out of the gas storage tank 11 from the gas outlet interface 11.2 of the gas storage tank 11; open the gas circuit valve five 12, and the high-temperature dry gas passes through the gas storage tank 11, dries the solidified gas storage material 21, and then is directly discharged into the atmosphere.

Claims

1. A compressed air solidification energy storage power generation system, comprising an air storage tank (11) and an air filter (1), characterized in that: The gas storage tank (11) is provided with an air inlet interface (11.1), an air outlet interface (11.2), a heat exchange liquid interface 1 (11.3), and a heat exchange liquid interface 2 (11.4); a ventilation pipeline (23) and a heat exchange pipeline (24) are provided in the gas storage tank (11); a plurality of openings are provided in the ventilation pipeline (23); two ends of the ventilation pipeline (23) are respectively connected to the air inlet interface (11.1) and the air outlet interface (11.2) through an expansion and compression device (22); two ends of the heat exchange pipeline (24) are respectively connected to the heat exchange liquid interface 1 (11.3) and the heat exchange liquid interface 2 (11.4); and the gas storage tank (11) is filled with a solidified gas storage material (21); The air filter (1) is connected to the air inlet interface (11.1) of the air storage tank (11) through the multi-stage air compressor (2), the cooling dryer (7), and the air circuit valve four (9) in sequence. The front end of the cooling dryer (7) is connected to the air circuit valve two (6). The air circuit valve two (6) and the cooling dryer (7) are simultaneously connected in parallel to the air circuit valve one (5). The rear end of each stage of the air compressor (2) is connected to a cooler (4); All coolers (4) and gas storage tanks (11) are connected to a low-temperature storage tank (20) and a high-temperature storage tank (19) to form a heat exchange cooling circuit: the low-temperature heat exchange liquid flowing out of the outlet of the low-temperature storage tank (20) is simultaneously sent to all coolers (4) and gas storage tanks (11) and then enters the high-temperature storage tank (19); The low-temperature heat exchange liquid of the low-temperature storage tank (20) enters the gas storage tank (11) from the heat exchange liquid interface 1 (11.3), flows through the heat exchange pipe (24), flows out of the gas storage tank (11) through the heat exchange liquid interface 2 (11.4), and finally enters the high-temperature storage tank (19). A liquid circuit valve 2 (16) is connected between the outlet of the low-temperature storage tank (20) and the heat exchange liquid interface 1 (11.3), and a liquid circuit valve 1 (15) is connected between the inlet of the high-temperature storage tank (19) and the heat exchange liquid interface 2 (11.4); The gas outlet interface (11.2) of the gas storage tank (11) is connected to a multi-stage expansion machine (14), and the front end of each stage of the expansion machine (14) is connected to a heat exchanger (13); All heat exchangers (13) and gas storage tanks (11) are connected to a low-temperature storage tank (20) and a high-temperature storage tank (19) to form a heat exchange and heating circuit: the high-temperature heat exchange liquid flowing out of the outlet of the high-temperature storage tank (19) is simultaneously sent to all heat exchangers (13) and gas storage tanks (11) and then enters the low-temperature storage tank (20); The high-temperature heat exchange liquid of the high-temperature storage tank (19) enters the gas storage tank (11) from the heat exchange liquid interface 2 (11.4), flows through the heat exchange pipe (24), flows out of the gas storage tank (11) through the heat exchange liquid interface 1 (11.3), and finally enters the low-temperature storage tank (20). A liquid circuit valve 3 (17) is connected between the outlet of the high-temperature storage tank (19) and the heat exchange liquid interface 2 (11.4), and a liquid circuit valve 4 (18) is connected between the inlet of the low-temperature storage tank (20) and the heat exchange liquid interface 1 (11.3).

2. A compressed air solidification energy storage power generation system according to claim 1, characterized in that: Gas circuit valve four (9) is connected in parallel with gas circuit valve three (8) and the high temperature generator (10); a flexible inflatable bag (25) is detachably connected to the middle of the ventilation pipe (23); a branch is provided between the gas storage tank (11) and the heat exchanger (13); and gas circuit valve five (12) is connected to the branch.

3. A compressed air solidification energy storage power generation system according to claim 1 or 2, characterized in that: The ventilation pipe (23) is a cylindrical tube body, and the openings are unevenly distributed on the cylindrical tube body, and the closer to the air outlet interface (11.2), the denser the openings.

4. A compressed air solidification energy storage power generation system according to claim 1 or 2, characterized in that: All coolers (4) and cooling dryers (7) are connected to the condensed water tank (3).

5. A method for using the compressed air solidification energy storage power generation system according to any one of claims 1 to 4, characterized in that: include: Gas storage stage: The air in the atmosphere is filtered through an air filter (1), and the filtered gas is compressed by a multi-stage air compressor (2), the temperature of which rises and releases heat. The liquid circuit valve 1 (15) and the liquid circuit valve 2 (16) are opened, and the liquid circuit valve 3 (17) and the liquid circuit valve 4 (18) are closed. The low-temperature heat exchange liquid in the low-temperature storage tank (20) flows through the cooler (4) and then flows into the high-temperature storage tank (19), so that the heat generated in the gas compression process is recovered; the low-temperature heat exchange liquid in the low-temperature storage tank (20) flows through the gas storage tank (11) and then flows into the high-temperature storage tank (19), and the low-temperature heat exchange liquid cools the gas storage tank (11), thereby increasing the solidification reserve and recovering the heat generated in the solidification process; During summer operation, the air is high-temperature and high-humidity gas. Open gas circuit valve 2 (6) and gas circuit valve 4 (9), close gas circuit valve 1 (5) and gas circuit valve 3 (8), and the high-pressure gas compressed by the multi-stage compressor is cooled and dried by the cooling dryer (7) and then enters the gas storage tank (11) through the air inlet interface (11.1); During winter operation, the air is low in temperature and humidity. Open gas circuit valve 1 (5) and gas circuit valve 4 (9), close gas circuit valve 2 (6) and gas circuit valve 3 (8), and the high-pressure gas compressed by the multi-stage compressor directly enters the gas storage tank (11) through the air inlet interface (11.1); Degassing power generation stage: during the process of compressed air expanding and doing work, the temperature will drop and need to absorb heat. The liquid circuit valve three (17) and the liquid circuit valve four (18) are opened, and the liquid circuit valve one (15) and the liquid circuit valve two (16) are closed. The high-temperature heat exchange liquid in the high-temperature storage tank (19) flows through the gas storage tank (11) to the low-temperature storage tank (20). The high-temperature heat exchange liquid heats up the gas storage tank (11) to increase the gas expansion energy. The high-temperature heat exchange liquid in the high-temperature storage tank (19) flows through the heat exchanger (13) to heat the gas, further increasing the gas expansion energy. Then, the cooled high-temperature heat exchange liquid flows into the low-temperature storage tank (20). The high-pressure and high-temperature gas drives the expander (14) to do work, driving the generator to generate electricity.

6. The method for using the compressed air solidification energy storage power generation system according to claim 5, characterized in that: After the system has been operating for a certain period of time for gas storage and power generation, the gas circuit valve three (8) is opened, the gas circuit valve four (9) is closed, and the temperature of the dry gas is increased through the high-temperature generator (10); a flexible inflatable bag (25) is inserted into the ventilation pipe (23), and the opening in the middle area of ​​the ventilation pipe (23) is closed, leaving only the upper and lower ventilation holes; the dry gas fully flows through the gas storage tank (11) through the gas inlet interface (11.1) of the gas storage tank (11) and the ventilation pipe (23) to solidify the gas storage material (21), and then the dry gas carries moisture and flows out of the gas storage tank (11) from the gas outlet interface (11.2) of the gas storage tank (11); the gas circuit valve five (12) is opened, and the high-temperature dry gas passes through the gas storage tank (11), dries the solidified gas storage material (21), and is directly discharged into the atmosphere.

Images