Compressed air energy storage inlet air drying and waste heat utilization system and operation method thereof

Abstract

The invention discloses a compressed air energy storage system inlet air drying and waste heat utilization system which comprises an absorption heat pump connected with an air inlet pipeline. An air outlet of the absorption heat pump is connected with a compressor, an air outlet of the compressor is connected with a first heat exchanger, and the first heat exchanger is connected with a high-pressure air storage tank The high-pressure gas storage tank is connected to the absorption heat pump; the first heat exchanger is further connected with a low-temperature storage tank and a high-temperature storage tank. The low-temperature storage tank and the high-temperature storage tank are connected to the absorption heat pump. The absorption heat pump is also connected with a second heat exchanger; the second heat exchanger is respectively connected with the low-temperature storage tank and the high-temperature storage tank; the second heat exchanger is further connected with an expansion machine. The invention further discloses an operation method of the inlet air drying and waste heat utilization system of the compressed air energy storage system. The system solves the problem that the water content of air at an inlet of the compressor is large, and the equipment failure rate is reduced; meanwhile, condensation waste heat is used for heating air to do work, and the cycle efficiency of a power station is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressed air energy storage, and specifically relates to an inlet air drying and waste heat utilization system for a compressed air energy storage system. The present invention also relates to an operating method of the inlet air drying and waste heat utilization system for a compressed air energy storage 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 and converts the electrical energy into compressed potential energy for storage; 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 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.

[0003] The water content in the air at the inlet of the compressor of the compressed air energy storage power station will seriously affect the performance of the compressor, and even cause water erosion in the flow part of the compressor. In addition, it will cause the following problems: (1) narrowing the air inlet and increasing the flow resistance; (2) reducing the volumetric efficiency; (3) easily causing water shock to the compressor. If a large amount of water is stored in the cylinder or cooler, it will also cause mechanical friction accidents; (4) water will easily cause the compression equipment to rust; (5) water mixed with lubricating oil will reduce the efficiency of the lubricating oil and accelerate mechanical wear. The stuffing box with oil seal will cause poor sealing; (6) reducing the production capacity calculated by weight; (7) for the gas transmission system, freezing accidents will occur in the cold season. Based on the influence of the above points, we should try to reduce the temperature of the air and improve the cooling effect to reduce the water content in the air. Summary of the invention

[0004] The purpose of the present invention is to provide an inlet air drying and waste heat utilization system for a compressed air energy storage system, which solves the problem of high water content in the compressor inlet air, avoids water shock in the compressor, and reduces the equipment failure rate; at the same time, the waste heat of condensation is used to heat the air to do work, thereby improving the cycle efficiency of the power station.

[0005] The technical solution adopted by the present invention is that the compressed air energy storage system inlet air drying and waste heat utilization system includes an absorption heat pump, the absorption heat pump is connected to an air inlet pipeline; the air outlet of the absorption heat pump is connected to a compressor through a pipeline, the air outlet of the compressor is connected to a first heat exchanger, the first heat exchanger is connected to a high-pressure gas storage tank through a pipeline; the air outlet of the high-pressure gas storage tank is connected to the absorption heat pump through a pipeline; The first heat exchanger is also connected to a low-temperature storage tank and a high-temperature storage tank through pipelines respectively; the low-temperature storage tank and the high-temperature storage tank are connected to an absorption heat pump through pipelines respectively; The absorption heat pump is also connected to a second heat exchanger through a pipeline, and the second heat exchanger is connected to a low-temperature storage tank and a high-temperature storage tank through pipelines respectively; the second heat exchanger is also connected to an expander through a pipeline.

[0006] The present invention is also characterized in that: Valves are provided on the pipelines between the absorption heat pump and the compressor.

[0007] A cryogenic pump is provided on the pipeline between the first heat exchanger and the cryogenic storage tank.

[0008] A first high-temperature pump is arranged on the pipeline between the high-temperature storage tank and the absorption heat pump.

[0009] A second high-temperature pump is provided on the pipeline between the second heat exchanger and the high-temperature storage tank.

[0010] The input end of the compressor is connected to an electric motor; the output end of the expander is connected to a generator.

[0011] The cold side inlet of the first heat exchanger is connected to the low-temperature storage tank, and the cold side outlet of the first heat exchanger is connected to the high-pressure gas storage tank; the hot side inlet of the first heat exchanger is connected to the compressor, and the hot side outlet of the first heat exchanger is connected to the high-temperature storage tank.

[0012] The cold side inlet of the second heat exchanger is connected to the absorption heat pump, and the cold side outlet of the second heat exchanger is connected to the low-temperature storage tank; the hot side inlet of the second heat exchanger is connected to the second high-temperature pump, and the hot side outlet of the second heat exchanger is connected to the expander.

[0013] The heat source of the absorption heat pump is divided into two paths. One path is the air that flows to the compressor after being absorbed by the absorption heat pump; the other path is the high-temperature liquid in the high-temperature storage tank that flows to the low-temperature storage tank after passing through the absorption heat pump.

[0014] Another technical solution adopted by the present invention is an operation method of an inlet air drying and waste heat utilization system of a compressed air energy storage system, comprising the following steps: Step 1: The high-temperature liquid in the high-temperature storage tank provides a driving heat source for the absorption heat pump; air enters the absorption heat pump through the air inlet pipe to absorb heat, and the moisture in the air becomes condensed water and is discharged through the valve; the dried air enters the compressor for air compression; at the same time, the high-temperature liquid flows into the low-temperature storage tank; Step 2: After the high-temperature and high-pressure air compressed by the compressor exchanges heat with the low-temperature liquid in the low-temperature storage tank in the first heat exchanger, the low-temperature and high-pressure gas enters the high-pressure gas storage tank, and the high-temperature liquid flows to the high-temperature storage tank; Step 3: The low-temperature and high-pressure gas in the high-pressure gas storage tank flows to the absorption heat pump for heating and becomes high-pressure medium-temperature air, which flows to the second heat exchanger, exchanges heat with the high-temperature liquid in the high-temperature storage tank, and then flows to the expander for becoming high-pressure and high-temperature air to perform work and generate electricity externally; at the same time, the low-temperature liquid passing through the second heat exchanger flows to the low-temperature storage tank.

[0015] The beneficial effects of the present invention are: The inlet air drying and waste heat utilization system of the compressed air energy storage system of the present invention solves the problem of high water content in the compressor inlet air. The air at the compressor inlet serves as a low-temperature heat source for the absorption heat pump. After being cooled, water vapor in the air is condensed into water and discharged, thereby avoiding water shock in the compressor and reducing the failure rate of the equipment. At the same time, the absorption heat pump utilizes the condensation heat to heat the high-pressure and low-temperature air entering the expander as the first-stage heating, thereby realizing step-by-step utilization of heat, reducing irreversible losses, improving the efficiency of the compressor and the expander, further improving the cycle efficiency of the compressed air energy storage power station, and improving the reliability and economy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the inlet air drying and waste heat utilization system of the compressed air energy storage system of the present invention.

[0017] In the figure: 1. absorption heat pump; 2. compressor; 3. electric motor; 4. first heat exchanger; 5. high-pressure gas storage tank; 6. low-temperature storage tank; 7. high-temperature storage tank; 8. low-temperature pump; 9. first high-temperature pump; 10. second high-temperature pump; 11. second heat exchanger; 12. expander; 13. generator; 14. valve. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] The inlet air drying and waste heat utilization system of the compressed air energy storage system of the present invention is as follows: Figure 1 As shown, it includes an absorption heat pump 1, which is connected to an air inlet pipe; the air outlet of the absorption heat pump 1 is connected to a compressor 2 through a pipe, and a valve 14 is provided on the pipe between the absorption heat pump 1 and the compressor 2 for discharging condensed water after air condensation. The input end of the compressor 2 is connected to an electric motor to supply energy to the compressor 2. The air outlet of the compressor 2 is connected to a first heat exchanger 4, and the first heat exchanger 4 is connected to a high-pressure gas storage tank 5 through a pipe; the air outlet of the high-pressure gas storage tank 5 is connected to the absorption heat pump 1 through a pipe; The first heat exchanger 4 is also connected to a low-temperature storage tank 6 and a high-temperature storage tank 7 through pipelines, respectively; the low-temperature storage tank 6 and the high-temperature storage tank 7 are connected to the absorption heat pump 1 through pipelines. A low-temperature pump 8 is provided on the pipeline between the first heat exchanger 4 and the low-temperature storage tank 6, and the low-temperature pump 8 pumps low-temperature liquid into the first heat exchanger 4 for heat exchange. A first high-temperature pump 9 is provided on the pipeline between the high-temperature storage tank 7 and the absorption heat pump 1, and the first high-temperature pump 9 pumps high-temperature liquid into the absorption heat pump 1, and the high-temperature liquid in the high-temperature storage tank 7 serves as a driving heat source for the absorption heat pump 1.

[0020] The cold side inlet of the first heat exchanger 4 is connected to the low-temperature storage tank 6, and the cold side outlet of the first heat exchanger 4 is connected to the high-pressure gas storage tank 5; the hot side inlet of the first heat exchanger 4 is connected to the compressor 2, and the hot side outlet of the first heat exchanger 4 is connected to the high-temperature storage tank 7.

[0021] The absorption heat pump 1 is also connected to a second heat exchanger 11 through a pipeline, and the second heat exchanger 11 is connected to the low temperature storage tank 6 and the high temperature storage tank 7 through pipelines respectively; a second high temperature pump 10 is arranged on the pipeline between the second heat exchanger 11 and the high temperature storage tank 7. The second heat exchanger 11 is also connected to an expander 12 through a pipeline. The output end of the expander 12 is connected to a generator 13 for generating electricity externally.

[0022] The cold side inlet of the second heat exchanger 11 is connected to the absorption heat pump 1 , and the cold side outlet of the second heat exchanger 11 is connected to the low-temperature storage tank 6 ; the hot side inlet of the second heat exchanger 11 is connected to the second high-temperature pump 10 , and the hot side outlet of the second heat exchanger 11 is connected to the expander 12 .

[0023] The operating method of the compressed air energy storage system inlet air drying and waste heat utilization system of the present invention specifically comprises the following steps: Step 1: The high-temperature liquid in the high-temperature storage tank 7 provides a driving heat source for the absorption heat pump 1; the air enters the absorption heat pump 1 through the air inlet pipe, and is cooled as the low-temperature heat source of the absorption heat pump 1. The moisture in the air becomes condensed water and is discharged through the valve 14, which plays a role in drying the air. The cooled and dehumidified air enters the compressor 2 driven by the motor 3. At the same time, the high-temperature liquid in the high-temperature storage tank 7 flows into the low-temperature storage tank 6; Step 2: After being compressed, the air becomes high-temperature and high-pressure air. The high-temperature and high-pressure air and the low-temperature liquid in the low-temperature storage tank 6 exchange heat in the first heat exchanger 4 after passing through the low-temperature pump 8. The high-temperature and high-pressure air becomes high-pressure and low-temperature air and flows into the high-pressure gas storage tank 5, and the low-temperature liquid becomes high-temperature liquid and flows into the high-temperature storage tank 7.

[0024] Step 3: The high-pressure and low-temperature air in the high-pressure gas storage tank 5 flows to the absorption heat pump 1, where it is heated to high-pressure and medium-temperature air (first heating), flows to the second heat exchanger 11, and exchanges energy with the high-temperature liquid in the high-temperature storage tank 7 that has passed through the second high-temperature pump 10 in the second heat exchanger 11, becomes high-pressure and high-temperature air (second heating), flows to the expander 12, and the expander 12 drives the generator 13 to generate electricity externally. After passing through the expander 12, the high-pressure and high-temperature air becomes low-pressure and low-temperature air and is discharged into the atmosphere through the air outlet. At the same time, the low-temperature liquid that has passed through the second heat exchanger 11 flows to the low-temperature storage tank 6 for recycling.

[0025] The inlet air drying and waste heat utilization system of the compressed air energy storage system of the present invention can greatly reduce the water content of the air entering the compressor, reduce the air circulation resistance in the compressor, improve the volumetric efficiency, avoid water shock in the compressor, and reduce the failure rate of the equipment; in addition, the high-pressure and low-temperature air is heated by the absorption heat pump as the first stage heating, and then heated by the second heat exchanger as the second stage heating, thereby realizing the step-by-step utilization of heat, reducing irreversible losses, improving the efficiency of the compressor and the expander, further improving the cycle efficiency of the compressed air energy storage power station, and improving the reliability and economy of the equipment.

[0026] Example 1 This embodiment provides a compressed air energy storage system inlet air drying and waste heat utilization system, such as Figure 1 As shown, it includes an absorption heat pump 1, which is connected to an air inlet pipe; the air outlet of the absorption heat pump 1 is connected to a compressor 2 through a pipe, the air outlet of the compressor 2 is connected to a first heat exchanger 4, and the first heat exchanger 4 is connected to a high-pressure gas storage tank 5 through a pipe; the air outlet of the high-pressure gas storage tank 5 is connected to the absorption heat pump 1 through a pipe; The first heat exchanger 4 is also connected to a low-temperature storage tank 6 and a high-temperature storage tank 7 through pipelines; the low-temperature storage tank 6 and the high-temperature storage tank 7 are connected to the absorption heat pump 1 through pipelines; The absorption heat pump 1 is also connected to a second heat exchanger 11 through a pipeline, and the second heat exchanger 11 is connected to the low-temperature storage tank 6 and the high-temperature storage tank 7 through pipelines respectively; the second heat exchanger 11 is also connected to an expander 12 through a pipeline.

[0027] Example 2 This embodiment provides a compressed air energy storage system inlet air drying and waste heat utilization system, such as Figure 1 As shown, it includes an absorption heat pump 1, which is connected to an air inlet pipe; the air outlet of the absorption heat pump 1 is connected to a compressor 2 through a pipe, and a valve 14 is provided on the pipes between the absorption heat pump 1 and the compressor 2. The air outlet of the compressor 2 is connected to a first heat exchanger 4, and the first heat exchanger 4 is connected to a high-pressure gas storage tank 5 through a pipe; the air outlet of the high-pressure gas storage tank 5 is connected to the absorption heat pump 1 through a pipe; The first heat exchanger 4 is also connected to a low-temperature storage tank 6 and a high-temperature storage tank 7 through pipelines; the low-temperature storage tank 6 and the high-temperature storage tank 7 are connected to the absorption heat pump 1 through pipelines; The absorption heat pump 1 is also connected to a second heat exchanger 11 through a pipeline, and the second heat exchanger 11 is connected to the low-temperature storage tank 6 and the high-temperature storage tank 7 through pipelines respectively; the second heat exchanger 11 is also connected to an expander 12 through a pipeline.

[0028] Example 3 This embodiment provides a compressed air energy storage system inlet air drying and waste heat utilization system, such as Figure 1As shown, it includes an absorption heat pump 1, which is connected to an air inlet pipe; the air outlet of the absorption heat pump 1 is connected to a compressor 2 through a pipe, and a valve 14 is provided on the pipes between the absorption heat pump 1 and the compressor 2. The air outlet of the compressor 2 is connected to a first heat exchanger 4, and the first heat exchanger 4 is connected to a high-pressure gas storage tank 5 through a pipe; the air outlet of the high-pressure gas storage tank 5 is connected to the absorption heat pump 1 through a pipe; The first heat exchanger 4 is also connected to a low-temperature storage tank 6 and a high-temperature storage tank 7 through pipelines, respectively; the low-temperature storage tank 6 and the high-temperature storage tank 7 are connected to the absorption heat pump 1 through pipelines, respectively; a low-temperature pump 8 is provided on the pipeline between the first heat exchanger 4 and the low-temperature storage tank 6. A first high-temperature pump 9 is provided on the pipeline between the high-temperature storage tank 7 and the absorption heat pump 1.

[0029] The absorption heat pump 1 is also connected to a second heat exchanger 11 through a pipeline, and the second heat exchanger 11 is connected to the low-temperature storage tank 6 and the high-temperature storage tank 7 through pipelines respectively; the second heat exchanger 11 is also connected to an expander 12 through a pipeline.

[0030] Example 4 This embodiment provides a compressed air energy storage system inlet air drying and waste heat utilization system, such as Figure 1 As shown, it includes an absorption heat pump 1, which is connected to an air inlet pipe; the air outlet of the absorption heat pump 1 is connected to a compressor 2 through a pipe, and a valve 14 is provided on the pipes between the absorption heat pump 1 and the compressor 2. The air outlet of the compressor 2 is connected to a first heat exchanger 4, and the first heat exchanger 4 is connected to a high-pressure gas storage tank 5 through a pipe; the air outlet of the high-pressure gas storage tank 5 is connected to the absorption heat pump 1 through a pipe; The first heat exchanger 4 is also connected to a low-temperature storage tank 6 and a high-temperature storage tank 7 through pipelines, respectively; the low-temperature storage tank 6 and the high-temperature storage tank 7 are connected to the absorption heat pump 1 through pipelines, respectively; a low-temperature pump 8 is provided on the pipeline between the first heat exchanger 4 and the low-temperature storage tank 6. A first high-temperature pump 9 is provided on the pipeline between the high-temperature storage tank 7 and the absorption heat pump 1.

[0031] The cold side inlet of the first heat exchanger 4 is connected to the low-temperature storage tank 6, and the cold side outlet of the first heat exchanger 4 is connected to the high-pressure gas storage tank 5; the hot side inlet of the first heat exchanger 4 is connected to the compressor 2, and the hot side outlet of the first heat exchanger 4 is connected to the high-temperature storage tank 7.

[0032] The absorption heat pump 1 is also connected to a second heat exchanger 11 through a pipeline, and the second heat exchanger 11 is connected to the low temperature storage tank 6 and the high temperature storage tank 7 through pipelines respectively; the second heat exchanger 11 is also connected to an expander 12 through a pipeline. A second high temperature pump 10 is arranged on the pipeline between the second heat exchanger 11 and the high temperature storage tank 7.

[0033] Example 5 This embodiment provides a compressed air energy storage system inlet air drying and waste heat utilization system, such as Figure 1As shown, it includes an absorption heat pump 1, which is connected to an air inlet pipe; the air outlet of the absorption heat pump 1 is connected to a compressor 2 through a pipe, and a valve 14 is provided on the pipes between the absorption heat pump 1 and the compressor 2. The air outlet of the compressor 2 is connected to a first heat exchanger 4, and the first heat exchanger 4 is connected to a high-pressure gas storage tank 5 through a pipe; the air outlet of the high-pressure gas storage tank 5 is connected to the absorption heat pump 1 through a pipe; The first heat exchanger 4 is also connected to a low-temperature storage tank 6 and a high-temperature storage tank 7 through pipelines, respectively; the low-temperature storage tank 6 and the high-temperature storage tank 7 are connected to the absorption heat pump 1 through pipelines, respectively; a low-temperature pump 8 is provided on the pipeline between the first heat exchanger 4 and the low-temperature storage tank 6. A first high-temperature pump 9 is provided on the pipeline between the high-temperature storage tank 7 and the absorption heat pump 1.

[0034] The cold side inlet of the first heat exchanger 4 is connected to the low-temperature storage tank 6, and the cold side outlet of the first heat exchanger 4 is connected to the high-pressure gas storage tank 5; the hot side inlet of the first heat exchanger 4 is connected to the compressor 2, and the hot side outlet of the first heat exchanger 4 is connected to the high-temperature storage tank 7.

[0035] The absorption heat pump 1 is also connected to a second heat exchanger 11 through a pipeline, and the second heat exchanger 11 is connected to the low temperature storage tank 6 and the high temperature storage tank 7 through pipelines respectively; the second heat exchanger 11 is also connected to an expander 12 through a pipeline. A second high temperature pump 10 is arranged on the pipeline between the second heat exchanger 11 and the high temperature storage tank 7.

[0036] The cold side inlet of the second heat exchanger 11 is connected to the absorption heat pump 1 , and the cold side outlet of the second heat exchanger 11 is connected to the low-temperature storage tank 6 ; the hot side inlet of the second heat exchanger 11 is connected to the second high-temperature pump 10 , and the hot side outlet of the second heat exchanger 11 is connected to the expander 12 .

[0037] Example 6 This embodiment provides an operation method of a compressed air energy storage system inlet air drying and waste heat utilization system, which specifically includes the following steps: Step 1: The high-temperature liquid in the high-temperature storage tank 7 provides a driving heat source for the absorption heat pump 1; air enters the absorption heat pump 1 through the air inlet pipe to absorb heat, and the moisture in the air becomes condensed water and is discharged through the valve 14; the dried air enters the compressor 2 for air compression; at the same time, the high-temperature liquid flows into the low-temperature storage tank 6; Step 2: After the high-temperature and high-pressure air compressed by the compressor 2 exchanges heat with the low-temperature liquid in the low-temperature storage tank 6 in the first heat exchanger 4, the low-temperature and high-pressure gas enters the high-pressure gas storage tank 5, and the high-temperature liquid flows to the high-temperature storage tank 7; Step 3: The low-temperature and high-pressure gas in the high-pressure gas storage tank 5 flows to the absorption heat pump 1 for heating and becomes high-pressure and medium-temperature air, which flows to the second heat exchanger 11, exchanges heat with the high-temperature liquid in the high-temperature storage tank 7, and then becomes high-pressure and high-temperature air and flows to the expander 12 to perform work and generate electricity externally; at the same time, the low-temperature liquid passing through the second heat exchanger 11 flows to the low-temperature storage tank 6.

Claims

1. Compressed air energy storage system inlet air drying and waste heat utilization system, characterized in that: The invention comprises an absorption heat pump (1), wherein the absorption heat pump (1) is connected to an air inlet pipe; the air outlet of the absorption heat pump (1) is connected to a compressor (2) via a pipe, the air outlet of the compressor (2) is connected to a first heat exchanger (4), the first heat exchanger (4) is connected to a high-pressure gas storage tank (5) via a pipe; the air outlet of the high-pressure gas storage tank (5) is connected to the absorption heat pump (1) via a pipe; The first heat exchanger (4) is also connected to a low-temperature storage tank (6) and a high-temperature storage tank (7) via pipelines; the low-temperature storage tank (6) and the high-temperature storage tank (7) are connected to an absorption heat pump (1) via pipelines; The absorption heat pump (1) is also connected to a second heat exchanger (11) via a pipeline, and the second heat exchanger (11) is connected to the low-temperature storage tank (6) and the high-temperature storage tank (7) via pipelines respectively; the second heat exchanger (11) is also connected to an expander (12) via a pipeline.

2. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 1, characterized in that: A valve (14) is provided on the pipeline between the absorption heat pump (1) and the compressor (2).

3. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 1, characterized in that: A cryogenic pump (8) is provided on the pipeline between the first heat exchanger (4) and the cryogenic storage tank (6).

4. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 1, characterized in that: A first high-temperature pump (9) is provided on the pipeline between the high-temperature storage tank (7) and the absorption heat pump (1).

5. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 1, characterized in that: A second high-temperature pump (10) is provided on the pipeline between the second heat exchanger (11) and the high-temperature storage tank (7).

6. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 1, characterized in that: The input end of the compressor (2) is connected to a motor (3); the output end of the expander (12) is connected to a generator (13).

7. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 3, characterized in that: The cold side inlet of the first heat exchanger (4) is connected to a low-temperature storage tank (6), and the cold side outlet of the first heat exchanger (4) is connected to a high-pressure gas storage tank (5); the hot side inlet of the first heat exchanger (4) is connected to a compressor (2), and the hot side outlet of the first heat exchanger (4) is connected to a high-temperature storage tank (7).

8. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 5, characterized in that: The cold side inlet of the second heat exchanger (11) is connected to the absorption heat pump (1), and the cold side outlet of the second heat exchanger (11) is connected to the low-temperature storage tank (6); the hot side inlet of the second heat exchanger (11) is connected to the second high-temperature pump (10), and the hot side outlet of the second heat exchanger (11) is connected to the expander (12).

9. The compressed air energy storage system inlet air drying and waste heat utilization system according to claim 1, characterized in that: The heat source of the absorption heat pump (1) is divided into two paths, one path is air that is absorbed by the absorption heat pump (1) and then flows to the compressor (2); the other path is high-temperature liquid in the high-temperature storage tank (7) that flows to the low-temperature storage tank (6) after passing through the absorption heat pump (1).

10. The method for operating the compressed air energy storage system inlet air drying and waste heat utilization system according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: The high-temperature liquid in the high-temperature storage tank (7) provides a driving heat source for the absorption heat pump (1); air enters the absorption heat pump (1) through the air inlet pipe to absorb heat, and the moisture in the air becomes condensed water and is discharged through the valve (14); the dried air enters the compressor (2) for air compression; at the same time, the high-temperature liquid flows into the low-temperature storage tank (6); Step 2: After the high-temperature and high-pressure air compressed by the compressor (2) and the low-temperature liquid in the low-temperature storage tank (6) exchange heat in the first heat exchanger (4), the low-temperature and high-pressure gas enters the high-pressure gas storage tank (5), and the high-temperature liquid flows to the high-temperature storage tank (7); Step 3: The low-temperature and high-pressure gas in the high-pressure gas storage tank (5) flows to the absorption heat pump (1) to be heated and converted into high-pressure medium-temperature air, which then flows to the second heat exchanger (11), exchanges heat with the high-temperature liquid in the high-temperature storage tank (7), and then flows to the expander (12) to be converted into high-pressure and high-temperature air to perform work and generate electricity externally; at the same time, the low-temperature liquid that passes through the second heat exchanger (11) flows to the low-temperature storage tank (6).

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