Compressed air energy storage main and auxiliary machine cooling waste heat utilization system and operation method thereof

Abstract

The compressed air energy storage main and auxiliary machine cooling waste heat utilization system comprises a mechanical ventilation tower, and an outlet of the mechanical ventilation tower is connected with a main and auxiliary machine heat dissipation device through a pipeline; an outlet of the main and auxiliary machine heat dissipation device is divided into two paths, one path is connected with an absorption heat pump through a pipeline, and the other path and the mechanical ventilation tower form a circulation loop through a pipeline. The absorption heat pump and the mechanical ventilation tower form a circulation loop through a pipeline; the absorption heat pump is connected with power supply equipment; the outlet of the absorption heat pump is also respectively connected with a heat exchanger and a heat user through pipelines; and the heat exchanger and the absorption heat pump as well as the heat user and the absorption heat pump respectively form a circulation loop through pipelines. The power supply equipment is connected with the heat exchanger. The invention further discloses an operation method of the compressed air energy storage main and auxiliary machine cooling waste heat utilization system. The system can effectively utilize the waste heat of the circulating water after the main machine and the auxiliary machine are cooled, reduce the heat loss of the compressed air energy storage power station and improve the efficiency of the power station.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressed air energy storage, and specifically relates to a compressed air energy storage main and auxiliary machine cooling waste heat utilization system. The present invention also relates to an operating method of the compressed air energy storage main and auxiliary machine cooling waste heat utilization system. Background Art

[0002] Compressed air energy storage technology is a new type of large-scale physical energy storage technology. During the period of low load on the power grid, the compressor compresses the air to convert the electrical energy into compressed potential energy and store it; during the period of high load on the power grid, the high-pressure gas in the gas storage reservoir is released to drive the generator to generate electricity. In response to the demand for high-power and large-capacity energy storage, compressed air energy storage technology is one of the only few energy storage technologies that can replace pumped storage. The best application scenario for compressed air energy storage is to provide storage for large-scale integrated energy bases and to couple traditional thermal power units to achieve deep peak regulation and peak power generation. At present, compressed air energy storage power stations basically do not use supplementary combustion, so it is very important to reduce the heat loss of compressed air energy storage power stations, which is one of the key parameters for improving the efficiency of power stations. Summary of the invention

[0003] The purpose of the present invention is to provide a compressed air energy storage main and auxiliary machine cooling waste heat utilization system, which can effectively utilize the circulating water waste heat after the main and auxiliary machines are cooled, reduce the heat loss of the compressed air energy storage power station, and improve the efficiency of the power station.

[0004] The technical solution adopted by the present invention is that the compressed air energy storage main and auxiliary machine cooling waste heat utilization system includes a mechanical ventilation tower, the outlet of the mechanical ventilation tower is connected to the main and auxiliary machine heat dissipation device through a pipeline; the outlet of the main and auxiliary machine heat dissipation device is divided into two paths, one of which is connected to an absorption heat pump through a pipeline, and the other is connected to the mechanical ventilation tower through a pipeline to form a circulation loop; the absorption heat pump and the mechanical ventilation tower form a circulation loop through a pipeline; the absorption heat pump is connected to a power supply device; The outlet of the absorption heat pump is also connected to a heat exchanger and a heat user through pipelines; the heat exchanger (8) and the absorption heat pump, the heat user and the absorption heat pump form a circulation loop through pipelines; the power supply equipment is connected to the heat exchanger.

[0005] The present invention is also characterized in that: The power supply device includes a high-pressure gas storage tank, and the gas outlet of the high-pressure gas storage tank is connected to the heat exchanger; The power supply equipment also includes an expander, the air inlet of the expander is connected to the heat exchanger through a pipeline; the output end of the expander is connected to a generator, the generator is connected to an electric drive device through a wire, and the electric drive device is connected to the absorption heat pump through a wire.

[0006] A first circulating water pump is arranged on the pipeline between the mechanical ventilation tower and the main and auxiliary machine heat dissipation device.

[0007] A first valve is arranged on the pipeline between the main and auxiliary machine heat dissipation device and the absorption heat pump, and a second valve is arranged on the pipeline between the main and auxiliary machine heat dissipation device and the mechanical ventilation tower.

[0008] The outlet of the absorption heat pump is connected to the second circulating water pump through a pipeline, and the outlet of the second circulating water pump is divided into two paths and connected to the heat exchanger and the heat user through pipelines respectively.

[0009] A third valve is arranged on the pipeline between the second circulating water pump and the heat exchanger.

[0010] A fourth valve is provided on the pipeline between the second circulating water pump and the heat user.

[0011] A fifth valve is provided on the pipeline between the heat exchanger and the high-pressure gas storage tank.

[0012] The hot side inlet of the heat exchanger is connected to the third valve, and the hot side outlet of the heat exchanger is connected to the expander; the cold side inlet of the heat exchanger is connected to the fifth valve, and the cold side outlet of the heat exchanger is connected to the absorption heat pump.

[0013] Another technical solution adopted by the present invention is an operation method of a compressed air energy storage main and auxiliary machine cooling waste heat utilization system, comprising the following steps: Step 1: The circulating water in the mechanical ventilation tower 1 flows to the main and auxiliary machine heat dissipation device 3 after passing through the first circulating water pump 2 to absorb heat, and then a part of it flows to the absorption heat pump 4 as a low-temperature heat source, and the other part flows back to the mechanical ventilation tower 1; Step 2: After the low-temperature heat source of the absorption heat pump 4 passes through the second circulating water pump 7, a part of it provides heat to the heat user 9 and then flows back to the absorption heat pump 4, and the other part flows to the heat exchanger 8; Step 3: The high-pressure and low-temperature air in the high-pressure gas storage tank 12 exchanges heat with the heat source flowing to the heat exchanger 8, and the heat source flows back to the absorption heat pump 4 after cooling; the high-pressure and medium-temperature air generates electricity externally after doing work through the expander 14, and the power supply is used as the power supply for the absorption heat pump 4.

[0014] The beneficial effects of the present invention are: The compressed air energy storage main and auxiliary machine cooling waste heat utilization system of the present invention solves the problem of effective utilization of the waste heat of circulating water after the main and auxiliary machines are cooled. The low and medium temperature circulating water generated after cooling by the main and auxiliary machine heat dissipation device is used as the low-temperature heat source of the absorption heat pump. A part of the high-pressure and low-temperature air entering the expander is heated as the first stage heating, thereby realizing the step-by-step utilization of heat and reducing irreversible losses; the other part is used to supply heat to heat users, thereby realizing the effective utilization of waste heat, improving the circulation efficiency of the compressed air energy storage power station, and improving the overall effective utilization rate of heat in the compressed air energy storage power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the compressed air energy storage main and auxiliary machine cooling waste heat utilization system of the present invention.

[0016] In the figure: 1. Mechanical ventilation tower; 2. First circulating water pump; 3. Main and auxiliary machine heat dissipation device; 4. Absorption heat pump; 5. First valve; 6. Second valve; 7. Second circulating water pump; 8. Heat exchanger; 9. Heat user; 10. Third valve; 11. Fourth valve; 12. High-pressure gas storage tank; 13. Fifth valve; 14. Expander; 15. Generator; 16. Electric drive device. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The compressed air energy storage main and auxiliary machine cooling waste heat utilization system of the present invention is as follows Figure 1 As shown, it includes a mechanical ventilation tower 1, and the outlet of the mechanical ventilation tower 1 is connected to the main and auxiliary machine heat dissipation device 3 through a pipeline. The main and auxiliary machine heat dissipation device 3 is a device that uses water to cool the heat generated by the main and auxiliary machines to ensure the stable operation of the main and auxiliary machines. A first circulating water pump 2 is arranged on the pipeline between the mechanical ventilation tower 1 and the main and auxiliary machine heat dissipation device 3. The outlet of the main and auxiliary machine heat dissipation device 3 is divided into two paths, one of which is connected to the absorption heat pump 4 through a pipeline, and the other is connected to the mechanical ventilation tower 1 through a pipeline to form a circulation loop; the absorption heat pump 4 and the mechanical ventilation tower 1 form a circulation loop through a pipeline; the cooling water in the mechanical ventilation tower 1 passes through the first circulating water pump 2 to cool the main and auxiliary machine heat dissipation device 3 and absorb heat, and then flows to the absorption heat pump 4 as a low-temperature heat source of the absorption heat pump.

[0019] A first valve 5 is provided on the pipeline between the main and auxiliary machine heat dissipation device 3 and the absorption heat pump 4, and a second valve 6 is provided on the pipeline between the main and auxiliary machine heat dissipation device 3 and the mechanical ventilation tower 1. The first valve 5 and the second valve 6 adjust the outflow of the main and auxiliary machine heat dissipation device 3 as needed.

[0020] The outlet of the absorption heat pump 4 is connected to the second circulating water pump 7 through a pipeline, and the outlet of the second circulating water pump 7 is divided into two paths and connected to the heat exchanger 8 and the heat user 9 through pipelines respectively. The heat exchanger 8 and the absorption heat pump 4, and the heat user 9 and the absorption heat pump 4 form a circulation loop through pipelines respectively; the absorption heat pump 4 is connected to a power supply device to provide power for the absorption heat pump 4. The power supply device is connected to the heat exchanger 8. The low-temperature heat source is diverted by the absorption heat pump 4 to the heat user 9 and the heat exchanger 8 through the second circulating water pump 7 to supply heat to the outside.

[0021] A third valve 10 is provided on the pipeline between the second circulating water pump 7 and the heat exchanger 8. A fourth valve 11 is provided on the pipeline between the second circulating water pump 7 and the heat user 9. The third valve 10 and the fourth valve 11 adjust the water supply of the absorption heat pump 4 through the second circulating water pump 7 as needed.

[0022] The hot side inlet of the heat exchanger 8 is connected to the third valve 10, and the hot side outlet of the heat exchanger 8 is connected to the expander 14; the cold side inlet of the heat exchanger 8 is connected to the fifth valve 13, and the cold side outlet of the heat exchanger 8 is connected to the absorption heat pump 4. The heat source flowing to the heat exchanger 8 is used for power supply equipment to generate electricity, and the generated electricity is supplied to the absorption heat pump 4 to complete the effective utilization of heat energy. The power supply equipment is a compressed air energy storage power generation system, including a high-pressure gas storage tank 12, the gas outlet of the high-pressure gas storage tank 12 is connected to the heat exchanger 8, and a fifth valve 13 is arranged on the pipeline between the heat exchanger 8 and the high-pressure gas storage tank 12. The fifth valve 13 is adjusted according to the different power generation requirements to adjust the gas supply. The power supply equipment also includes an expander 14, the air inlet of the expander 14 is connected to the heat exchanger 8 through a pipeline; the output end of the expander 14 is connected to a generator 15, the generator 15 is connected to an electric drive device 16 through a wire, and the electric drive device 16 is connected to the absorption heat pump 4 through a wire.

[0023] The operating method of the compressed air energy storage main and auxiliary machine cooling waste heat utilization system of the present invention specifically comprises the following steps: Step 1: The circulating water in the mechanical ventilation tower (1) flows through the first circulating water pump (2) to the main and auxiliary machine heat sink (3) to absorb heat. After passing through the main and auxiliary machine heat sink 3, the circulating water is divided into two parts: one part flows through the first valve 5 to the absorption heat pump 4, serving as the low-temperature heat source of the absorption heat pump 4, and is cooled and heat-exchanged by the absorption heat pump 4 before flowing back to the mechanical ventilation tower 1; the other part flows through the second valve 6 to the mechanical ventilation tower for cooling. During operation, the opening of the first valve 5 and the second valve 6 can be controlled to control the flow of circulating water flowing to the absorption heat pump 4.

[0024] Step 2: The hot water in the absorption heat pump 4 is circulated through the second circulating water pump 7 and is divided into two parts: one part flows to the heat user 9 through the fourth valve 11 to provide heat to the heat user 9, and then flows back to the absorption heat pump 4; the other part flows to the heat exchanger 8 through the third valve 10; Step 3: The heat exchanger 8 uses heat to heat the high-pressure, low-temperature air in the high-pressure gas storage tank 12, and then flows to the absorption heat pump 4. The opening of the third valve 10 and the fourth valve 11 is operated to control the flow of hot water to the heat user 9 and the heat exchanger 8. After passing through the heat exchanger 8, the high-pressure, low-temperature air in the high-pressure gas storage tank 12 is heated to high-pressure medium-temperature air and flows to the expander 14. After completing work in the expander 14, it becomes low-pressure, low-temperature air and is discharged to the atmosphere through the exhaust port. The drive mode of the absorption heat pump 4 adopts an electric drive mode, and the power supply is provided by the generator 15.

[0025] The compressed air energy storage main and auxiliary machine cooling waste heat utilization system of the present invention solves the problem of effective utilization of the waste heat of circulating water after the main and auxiliary machines are cooled. The low and medium temperature circulating water generated after cooling by the main and auxiliary machine heat dissipation device is used as the low-temperature heat source of the absorption heat pump. A part of the high-pressure and low-temperature air entering the expander is heated as the first stage heating, thereby realizing the step-by-step utilization of heat and reducing irreversible losses; the other part is used to supply heat to heat users, thereby realizing the effective utilization of waste heat, improving the circulation efficiency of the compressed air energy storage power station, and improving the overall effective utilization rate of heat in the compressed air energy storage power station.

[0026] Example 1 This embodiment provides a system for utilizing waste heat from cooling of main and auxiliary machines of compressed air energy storage, such as Figure 1 As shown, it includes a mechanical ventilation tower 1, the outlet of the mechanical ventilation tower 1 is connected to the main and auxiliary machine heat dissipation device 3 through a pipeline; the outlet of the main and auxiliary machine heat dissipation device 3 is divided into two paths, one of which is connected to the absorption heat pump 4 through a pipeline, and the other is connected to the mechanical ventilation tower 1 through a pipeline to form a circulation loop; the absorption heat pump 4 and the mechanical ventilation tower 1 form a circulation loop through a pipeline; the absorption heat pump 4 is connected to a power supply device; The outlet of the absorption heat pump 4 is also connected to the heat exchanger 8 and the heat user 9 through pipelines; the heat exchanger 8 and the absorption heat pump 4, the heat user 9 and the absorption heat pump 4 form a circulation loop through pipelines; the power supply equipment is connected to the heat exchanger 8.

[0027] Example 2 This embodiment provides a system for utilizing waste heat from cooling of main and auxiliary machines of compressed air energy storage, such as Figure 1 As shown, it includes a mechanical ventilation tower 1, and the outlet of the mechanical ventilation tower 1 is connected to the main and auxiliary machine heat dissipation device 3 through a pipeline. The outlet of the main and auxiliary machine heat dissipation device 3 is divided into two paths, one of which is connected to the absorption heat pump 4 through a pipeline, and the other is connected to the mechanical ventilation tower 1 through a pipeline to form a circulation loop; the absorption heat pump 4 and the mechanical ventilation tower 1 form a circulation loop through a pipeline; the absorption heat pump 4 is connected to a power supply device; The outlet of the absorption heat pump 4 is also connected to the heat exchanger 8 and the heat user 9 through pipelines; the heat exchanger 8 and the absorption heat pump 4, the heat user 9 and the absorption heat pump 4 form a circulation loop through pipelines; the power supply equipment is connected to the heat exchanger 8.

[0028] The power supply device includes a high-pressure gas storage tank 12, and the gas outlet of the high-pressure gas storage tank 12 is connected to the heat exchanger 8; The power supply equipment also includes an expander 14, the air inlet of the expander 14 is connected to the heat exchanger 8 through a pipeline; the output end of the expander 14 is connected to a generator 15, the generator 15 is connected to an electric drive device 16 through a wire, and the electric drive device 16 is connected to the absorption heat pump 4 through a wire.

[0029] Example 3 This embodiment provides a system for utilizing waste heat from cooling of main and auxiliary machines of compressed air energy storage, such as Figure 1 As shown, it includes a mechanical ventilation tower 1, the outlet of the mechanical ventilation tower 1 is connected to the main and auxiliary machine heat sink 3 through a pipeline, and a first circulating water pump 2 is arranged on the pipeline between the mechanical ventilation tower 1 and the main and auxiliary machine heat sink 3. The outlet of the main and auxiliary machine heat sink 3 is divided into two routes, one route is connected to the absorption heat pump 4 through a pipeline, and the other route forms a circulation loop with the mechanical ventilation tower 1 through a pipeline; the absorption heat pump 4 and the mechanical ventilation tower 1 form a circulation loop through a pipeline; a first valve 5 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the absorption heat pump 4, and a second valve 6 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the mechanical ventilation tower 1.

[0030] The absorption heat pump 4 is connected to a power supply device; The outlet of the absorption heat pump 4 is also connected to the heat exchanger 8 and the heat user 9 through pipelines; the heat exchanger 8 and the absorption heat pump 4, the heat user 9 and the absorption heat pump 4 form a circulation loop through pipelines; the power supply equipment is connected to the heat exchanger 8.

[0031] The power supply device includes a high-pressure gas storage tank 12, and the gas outlet of the high-pressure gas storage tank 12 is connected to the heat exchanger 8; The power supply equipment also includes an expander 14, the air inlet of the expander 14 is connected to the heat exchanger 8 through a pipeline; the output end of the expander 14 is connected to a generator 15, the generator 15 is connected to an electric drive device 16 through a wire, and the electric drive device 16 is connected to the absorption heat pump 4 through a wire.

[0032] Example 4 This embodiment provides a system for utilizing waste heat from cooling of main and auxiliary machines of compressed air energy storage, such as Figure 1 As shown, it includes a mechanical ventilation tower 1, the outlet of the mechanical ventilation tower 1 is connected to the main and auxiliary machine heat sink 3 through a pipeline, and a first circulating water pump 2 is arranged on the pipeline between the mechanical ventilation tower 1 and the main and auxiliary machine heat sink 3. The outlet of the main and auxiliary machine heat sink 3 is divided into two routes, one route is connected to the absorption heat pump 4 through a pipeline, and the other route forms a circulation loop with the mechanical ventilation tower 1 through a pipeline; the absorption heat pump 4 and the mechanical ventilation tower 1 form a circulation loop through a pipeline; a first valve 5 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the absorption heat pump 4, and a second valve 6 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the mechanical ventilation tower 1.

[0033] The absorption heat pump 4 is connected to a power supply device; The outlet of the absorption heat pump 4 is connected to the second circulating water pump 7 through a pipeline, and the outlet of the second circulating water pump 7 is divided into two paths, which are respectively connected to the heat exchanger 8 and the heat user 9 through pipelines. The heat exchanger 8 and the absorption heat pump 4, and the heat user 9 and the absorption heat pump 4 form a circulation loop through pipelines; the power supply equipment is connected to the heat exchanger 8.

[0034] The power supply device includes a high-pressure gas storage tank 12, and the gas outlet of the high-pressure gas storage tank 12 is connected to the heat exchanger 8; The power supply equipment also includes an expander 14, the air inlet of the expander 14 is connected to the heat exchanger 8 through a pipeline; the output end of the expander 14 is connected to a generator 15, the generator 15 is connected to an electric drive device 16 through a wire, and the electric drive device 16 is connected to the absorption heat pump 4 through a wire.

[0035] Example 5 This embodiment provides a system for utilizing waste heat from cooling of main and auxiliary machines of compressed air energy storage, such as Figure 1 As shown, it includes a mechanical ventilation tower 1, the outlet of the mechanical ventilation tower 1 is connected to the main and auxiliary machine heat sink 3 through a pipeline, and a first circulating water pump 2 is arranged on the pipeline between the mechanical ventilation tower 1 and the main and auxiliary machine heat sink 3. The outlet of the main and auxiliary machine heat sink 3 is divided into two routes, one route is connected to the absorption heat pump 4 through a pipeline, and the other route forms a circulation loop with the mechanical ventilation tower 1 through a pipeline; the absorption heat pump 4 and the mechanical ventilation tower 1 form a circulation loop through a pipeline; a first valve 5 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the absorption heat pump 4, and a second valve 6 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the mechanical ventilation tower 1.

[0036] The absorption heat pump 4 is connected to a power supply device; The outlet of the absorption heat pump 4 is connected to the second circulating water pump 7 through a pipeline, and the outlet of the second circulating water pump 7 is divided into two paths, which are respectively connected to the heat exchanger 8 and the heat user 9 through pipelines. The heat exchanger 8 and the absorption heat pump 4, and the heat user 9 and the absorption heat pump 4 form a circulation loop through pipelines; the power supply equipment is connected to the heat exchanger 8.

[0037] A third valve 10 is provided on the pipeline between the second circulating water pump 7 and the heat exchanger 8. A fourth valve 11 is provided on the pipeline between the second circulating water pump 7 and the heat user 9.

[0038] The power supply device includes a high-pressure gas storage tank 12, and the gas outlet of the high-pressure gas storage tank 12 is connected to the heat exchanger 8; The power supply equipment also includes an expander 14, the air inlet of the expander 14 is connected to the heat exchanger 8 through a pipeline; the output end of the expander 14 is connected to a generator 15, the generator 15 is connected to an electric drive device 16 through a wire, and the electric drive device 16 is connected to the absorption heat pump 4 through a wire.

[0039] Example 6 This embodiment provides a system for utilizing waste heat from cooling of main and auxiliary machines of compressed air energy storage, such as Figure 1As shown, it includes a mechanical ventilation tower 1, the outlet of the mechanical ventilation tower 1 is connected to the main and auxiliary machine heat sink 3 through a pipeline, and a first circulating water pump 2 is arranged on the pipeline between the mechanical ventilation tower 1 and the main and auxiliary machine heat sink 3. The outlet of the main and auxiliary machine heat sink 3 is divided into two routes, one route is connected to the absorption heat pump 4 through a pipeline, and the other route forms a circulation loop with the mechanical ventilation tower 1 through a pipeline; the absorption heat pump 4 and the mechanical ventilation tower 1 form a circulation loop through a pipeline; a first valve 5 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the absorption heat pump 4, and a second valve 6 is arranged on the pipeline between the main and auxiliary machine heat sink 3 and the mechanical ventilation tower 1.

[0040] The absorption heat pump 4 is connected to a power supply device; The outlet of the absorption heat pump 4 is connected to the second circulating water pump 7 through a pipeline, and the outlet of the second circulating water pump 7 is divided into two paths, which are respectively connected to the heat exchanger 8 and the heat user 9 through pipelines. The heat exchanger 8 and the absorption heat pump 4, and the heat user 9 and the absorption heat pump 4 form a circulation loop through pipelines; the power supply equipment is connected to the heat exchanger 8.

[0041] A third valve 10 is provided on the pipeline between the second circulating water pump 7 and the heat exchanger 8. A fourth valve 11 is provided on the pipeline between the second circulating water pump 7 and the heat user 9.

[0042] The power supply device includes a high-pressure gas storage tank 12 , and the gas outlet of the high-pressure gas storage tank 12 is connected to the heat exchanger 8 ; a fifth valve 13 is provided on the pipeline between the heat exchanger 8 and the high-pressure gas storage tank 12 .

[0043] The power supply equipment also includes an expander 14, the air inlet of the expander 14 is connected to the heat exchanger 8 through a pipeline; the output end of the expander 14 is connected to a generator 15, the generator 15 is connected to an electric drive device 16 through a wire, and the electric drive device 16 is connected to the absorption heat pump 4 through a wire.

[0044] Example 7 This embodiment provides an operation method of a compressed air energy storage main and auxiliary machine cooling waste heat utilization system, which specifically includes the following steps: Step 1: The circulating water in the mechanical ventilation tower 1 flows to the main and auxiliary machine heat dissipation device 3 after passing through the first circulating water pump 2 to absorb heat, and then a part of it flows to the absorption heat pump 4 as a low-temperature heat source, and the other part flows back to the mechanical ventilation tower 1; Step 2: After the low-temperature heat source of the absorption heat pump 4 passes through the second circulating water pump 7, a part of it provides heat to the heat user 9 and then flows back to the absorption heat pump 4, and the other part flows to the heat exchanger 8; Step 3: The high-pressure and low-temperature air in the high-pressure gas storage tank 12 exchanges heat with the heat source flowing to the heat exchanger 8, and the heat source flows back to the absorption heat pump 4 after cooling; the high-pressure and medium-temperature air generates electricity externally after doing work through the expander 14, and the power supply is used as the power supply for the absorption heat pump 4.

Claims

1. Compressed air energy storage main and auxiliary machine cooling waste heat utilization system, characterized in that: It comprises a mechanical ventilation tower (1), wherein the outlet of the mechanical ventilation tower (1) is connected to a main and auxiliary machine heat dissipation device (3) via a pipeline; the outlet of the main and auxiliary machine heat dissipation device (3) is divided into two paths, one of which is connected to an absorption heat pump (4) via a pipeline, and the other of which forms a circulation loop with the mechanical ventilation tower (1) via a pipeline; the absorption heat pump (4) and the mechanical ventilation tower (1) form a circulation loop via a pipeline; the absorption heat pump (4) is connected to a power supply device; The outlet of the absorption heat pump (4) is also connected to a heat exchanger (8) and a heat user (9) via pipelines; the heat exchanger (8) and the absorption heat pump (4), and the heat user (9) and the absorption heat pump (4) respectively form a circulation loop via pipelines; and the power supply device is connected to the heat exchanger (8).

2. The compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to claim 1 is characterized in that: The power supply device comprises a high-pressure gas storage tank (12), wherein the gas outlet of the high-pressure gas storage tank (12) is connected to the heat exchanger (8); The power supply device further comprises an expander (14), an air inlet of the expander (14) being connected to the heat exchanger (8) via a pipeline; an output end of the expander (14) being connected to a generator (15), the generator (15) being connected to an electric drive device (16) via a wire, and the electric drive device (16) being connected to the absorption heat pump (4) via a wire.

3. The compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to claim 1 is characterized in that: A first circulating water pump (2) is provided on the pipeline between the mechanical ventilation tower (1) and the main and auxiliary machine heat dissipation device (3).

4. The compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to claim 1 is characterized in that: A first valve (5) is provided on the pipeline between the main and auxiliary machine heat dissipation device (3) and the absorption heat pump (4), and a second valve (6) is provided on the pipeline between the main and auxiliary machine heat dissipation device (3) and the mechanical ventilation tower (1).

5. The compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to claim 2 is characterized in that: The outlet of the absorption heat pump (4) is connected to a second circulating water pump (7) via a pipeline, and the outlet of the second circulating water pump (7) is divided into two paths and connected to a heat exchanger (8) and a heat user (9) respectively via pipelines.

6. The compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to claim 5 is characterized in that: A third valve (10) is provided on the pipeline between the second circulating water pump (7) and the heat exchanger (8); and a fourth valve (11) is provided on the pipeline between the second circulating water pump (7) and the heat user (9).

7. The compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to claim 2 is characterized in that: A fifth valve (13) is provided on the pipeline between the heat exchanger (8) and the high-pressure gas storage tank (12).

8. The compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to claim 6 is characterized in that: The hot side inlet of the heat exchanger (8) is connected to the third valve (10), and the hot side outlet of the heat exchanger (8) is connected to the expander (14); the cold side inlet of the heat exchanger (8) is connected to the fifth valve (13), and the cold side outlet of the heat exchanger (8) is connected to the absorption heat pump (4).

9. The operating method of the compressed air energy storage main and auxiliary machine cooling waste heat utilization system according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: The circulating water in the mechanical ventilation tower (1) flows through the first circulating water pump (2) to the main and auxiliary machine heat dissipation device (3) to absorb heat, and then a portion of the circulating water flows to the absorption heat pump (4) as a low-temperature heat source, and the other portion flows back to the mechanical ventilation tower (1); Step 2: A portion of the low-temperature heat source of the absorption heat pump (4) flows back to the absorption heat pump (4) after passing through the second circulating water pump (7) to provide heat to the heat user (9), and the other portion flows to the heat exchanger (8); Step 3: The high-pressure, low-temperature air in the high-pressure gas storage tank (12) exchanges heat with the heat source flowing to the heat exchanger (8), and the heat source is cooled and flows back to the absorption heat pump (4); the high-pressure, medium-temperature air passes through the expander (14) to perform work and generates electricity externally, and the power supply is used as the power supply for the absorption heat pump (4).

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