Solar anti-freezing system for compressed air energy storage cooling tower and operation method of solar anti-freezing system

Abstract

The invention discloses a solar anti-freezing system for a compressed air energy storage cooling tower and an operation method of the solar anti-freezing system, and belongs to the technical field of compressed air energy storage. The circulating water system consists of an auxiliary machine heat exchanger, a first circulating water pump arranged in a circulating water pump room, a high-level water tank, a dry-wet combined cooling tower, an underground water storage tank, a water filling pump arranged in the underground water storage tank, connecting pipelines and a control system; the solar heating system is communicated with the circulating water system and can heat circulating water; and a plurality of remote thermometers and a plurality of valves are arranged on each connecting pipeline. The method can effectively solve the water-carrying anti-freezing problem of the dry-wet combined cooling tower during the shutdown period of the energy storage power station, the operation difficulty is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, in particular to a solar energy antifreeze system for a compressed air energy storage cooling tower and an operation method thereof. Background Art

[0002] With the rapid economic development and in-depth technological research and development in my country, the efficiency of compressed air energy storage systems has been continuously improved. Compressed air energy storage power stations have the characteristics of large capacity, short construction period, long life, strong integration with other technologies, flexible site selection, safety and environmental protection, so compressed air energy storage power stations have been promoted. As a water-saving cold end, the dry-wet combined cooling tower has been used in compressed air energy storage power stations in Northwest my country.

[0003] Compared with the continuous operation of thermal power plants, the operation of compressed air energy storage power stations is divided into two operating conditions: energy storage and power generation, and they operate intermittently and alternately, which brings about the problem of cooling tower antifreeze. Traditional dry-wet combined cooling tower antifreeze basically adopts three methods: variable frequency fans, shutters installed at the air inlet, and emergency water discharge system. Since the operation time of compressed air energy storage power stations is discontinuous and not fixed, when the temperature is low, the conventional antifreeze measures in power stations are not ideal. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a solar antifreeze system for a compressed air energy storage cooling tower and an operation method thereof, which can effectively solve the problem of water antifreeze of a dry-wet combined cooling tower during shutdown of an energy storage power station, reduce operating difficulty and improve operating efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A solar antifreeze system for a compressed air energy storage cooling tower comprises a circulating water system consisting of an auxiliary heat exchanger, a first circulating water pump arranged in a circulating water pump room, a high-level water tank, a dry-wet combined cooling tower, an underground water storage tank, a water filling pump arranged in the underground water storage tank, various connecting pipes and a control system, and also comprises a solar heating system connected to the circulating water system and capable of heating the circulating water; a plurality of remote thermometers and a plurality of valves are arranged on each connecting pipe.

[0006] A further improvement of the technical solution of the present invention is that: the solar heating system includes a plate heat exchanger arranged in the circulating water pump room and connected to the circulating water system; a heat collecting tank connected to the plate heat exchanger and a solar collector connected to the heat collecting tank are arranged outside the circulating water pump room; a closed circulation water pump is arranged on the connecting pipe between the plate heat exchanger and the heat collecting tank; a heat medium water circulating water pump is arranged on the pipe connecting between the solar collector and the heat collecting tank; and an auxiliary electric heating system is also arranged on the heat collecting tank.

[0007] A further improvement of the technical solution of the present invention is that: the water outlet end of the plate heat exchanger is connected to the underground water tank through a first bypass; a thirteenth valve is provided on the first bypass; the water in the underground water tank is replenished to the circulating water system and the solar heating system through a filling pump.

[0008] A further improvement of the technical solution of the present invention is that: a third remote thermometer, a third valve, a fifth valve, a sixth valve, a first remote thermometer, a second valve, a second remote thermometer and a first valve are arranged on the circulation loop connecting the plate heat exchanger and the circulating water system; the first valve is arranged on a second bypass connecting the water outlet and the return end of the plate heat exchanger; the first remote thermometer is arranged at the water inlet end of the first circulating water pump; the second remote thermometer is arranged at the return end of the plate heat exchanger, and the second valve is arranged at the front end of the second remote thermometer; the third remote thermometer is arranged at the water outlet end of the plate heat exchanger, and the third valve is arranged at the rear end of the third remote thermometer.

[0009] A further improvement of the technical solution of the present invention is that a fourth remote thermometer is provided at the water outlet of the water filling pump, and a fourth valve is provided on the water supply pipe connecting the water filling pump and the plate heat exchanger.

[0010] A further improvement of the technical solution of the present invention is that the selection of the solar collector, the heat collection tank, the auxiliary electric heating system, the plate heat exchanger, the heat medium water circulation pump and the closed circulation water pump is determined by calculation based on external meteorological conditions, the water volume in the circulating water system, the temperature rise of the circulating water and the heat exchange efficiency. The number of the closed circulation water pump and the heat medium water circulation pump is not less than 2, and 1 spare is provided.

[0011] A further improvement of the technical solution of the present invention is that: the dry-wet combined cooling tower comprises a dry section and a wet section arranged in series; the water outlet end of the dry section is connected to the water inlet end of the wet section; the water inlet end of the dry section is connected to the water outlet end of the plate heat exchanger; the water outlet end of the wet section is connected to the first circulating water pump; a third bypass is also arranged at the water outlet end of the dry section to be connected to the first circulating water pump; a seventh valve is arranged on the third bypass; an eighth valve and a tenth valve are respectively arranged at the two branch water inlet ends of the wet section; a ninth valve and an eleventh valve are respectively arranged at the two branch water outlet ends of the wet section; the outlet water of the dry section is also connected to the underground water storage tank through a fourth bypass, and a twelfth valve is arranged on the fourth bypass; the inlet water of the wet section is connected to the underground water storage tank through a fifth bypass, and a fourteenth valve is arranged on the fifth bypass; the outlet water of the wet section is connected to the underground water storage tank through a sixth bypass, and a fifteenth valve is arranged on the sixth bypass.

[0012] A further improvement of the technical solution of the present invention is that a sixteenth valve is provided on the connecting pipe between the total water outlet of the dry section and the total water inlet of the wet section; and a seventeenth valve is provided on the pipe connecting the total water outlet of the wet section and the first circulating water pump.

[0013] A method for operating a solar antifreeze system for a compressed air energy storage cooling tower, comprising the following: During the winter operation of the compressed air energy storage power station, due to the low temperature, the dry-wet combined cooling tower only operates in the dry section. At this time, the eighth valve and the tenth valve at the two water inlet ends of the wet section and the ninth valve and the eleventh valve at the two water outlet ends are closed, and the seventh valve on the third bypass is opened at the same time. At the same time, the sixteenth valve and the seventeenth valve are closed, and the fourteenth valve and the fifteenth valve are opened to drain the water in the wet section; During the day, the solar collector heats the heat medium water at 25℃ to 65℃ and stores it in the heat collection tank. When the sunshine intensity or sunshine duration is not enough to heat the heat medium water to 65℃, the auxiliary electric heating system is turned on to heat the heat medium water to 65℃. During the non-operation period of the compressed air energy storage power station in winter, the air inlet shutters and cooling tower fans of the dry section are closed, the first circulating water pump is operated with variable frequency, and the circulating water flow rate is maintained at 20%-40% of the normal flow rate. At the same time, the first valve is closed, and the second valve and the third valve are opened. When the temperature at the first remote thermometer or the second remote thermometer drops to 8℃, the closed circulating water pump starts to run, and the 65℃ heat medium water in the heat collection tank is used to supplement the heat to the circulating water system through the plate heat exchanger. When the temperature at the third remote thermometer rises to 20℃, the closed circulating water pump is operated at a low speed with variable frequency or stops running, and the first circulating water pump is kept running continuously, so that the circulating water temperature is always kept within the range of 8℃-20℃. During winter maintenance, open the twelfth and thirteenth valves to drain the water in the entire antifreeze system into the underground water tank; When the dry section of the dry-wet combined cooling tower is filled with water in winter, if the temperature at the fourth remote thermometer is higher than 18°C, the fourth valve is closed, the fifth valve and the sixth valve are opened, and the water in the underground water tank directly enters the dry-wet combined cooling tower; if the temperature at the fourth remote thermometer is lower than 18°C, the second valve, the fifth valve and the sixth valve are closed, the fourth valve and the third valve are opened, and the closed circulation water pump is started. The water in the ground water tank is heated to 18°C ​​by the plate heat exchanger and then enters the dry-wet combined cooling tower.

[0014] A further improvement of the technical solution of the present invention is that each temperature and flow rate can be adjusted and set according to the actual situation on site.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: 1. During the shutdown of the compressed air energy storage power station and the water filling in winter, the present invention utilizes the solar heating system to heat the circulating water to avoid the freezing of the dry-wet combined cooling tower, so that the operation mode of the dry-wet combined cooling tower is consistent with the operation mode of the main engine (compression condition, energy storage condition, intermittent alternating operation), solves the anti-freezing problem of the dry-wet combined cooling tower of the compressed air energy storage power station during the shutdown period, avoids the frequent filling and discharging of the cooling tower, reduces the difficulty of operation and operation, and improves the operation efficiency.

[0016] 2. The present invention adopts solar heating technology in the circulating cooling system of the compressed air energy storage power station, which is energy-saving, environmentally friendly, green and low-carbon, economical, applicable, safe and reliable; it is easy to construct and install, easy to operate; it is convenient to maintain and has stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 1 is a schematic structural diagram of a solar antifreeze system for a compressed air energy storage cooling tower provided in an embodiment of the present invention; Among them, 1. Plate heat exchanger; 2. Auxiliary heat exchanger; 3. First circulating water pump; 4. High-level water tank; 5. Dry section; 6. Wet section; 7. Filling pump; 8. First remote thermometer; 9. Second remote thermometer; 10. Third remote thermometer; 11. Fourth remote thermometer; 12. First valve; 13. Second valve; 14. Third valve; 15. Fourth valve; 16. Fifth valve; 17. Sixth valve; 18. Seventh valve; 19. Eighth valve; 20. Ninth valve; 21. Tenth valve; 22. Eleventh valve; 23. Twelfth valve; 24. Thirteenth valve; 25. Fourteenth valve; 26. Fifteenth valve; 27. Sixteenth valve; 28. Seventeenth valve; 29. ​​Heat collection tank; 30. Solar collector; 31. Heat medium water circulating pump; 32. Auxiliary electric heating system; 33. Closed circulation water pump. DETAILED DESCRIPTION

[0018] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1 As shown, a solar antifreeze system for a compressed air energy storage cooling tower includes a circulating water system consisting of an auxiliary heat exchanger 2, a first circulating water pump 3 arranged in a circulating water pump room, a high-level water tank 4, a dry-wet combined cooling tower, an underground water storage tank, a water filling pump 7 arranged in the underground water storage tank, various connecting pipes and a control system, and also includes a solar heating system connected to the circulating water system and capable of heating the circulating water; a plurality of remote thermometers and a plurality of valves are arranged on each connecting pipe.

[0022] Furthermore, the solar heating system includes a solar collector 30, a heat collecting tank 29 and a plate heat exchanger 1; the plate heat exchanger 1 is arranged in a circulating water pump room and connected to the circulating water system; a heat collecting tank 29 connected to the plate heat exchanger 1 and a solar collector 30 connected to the heat collecting tank 29 are arranged outside the circulating water pump room; a closed circulation water pump 33 is arranged on the connecting pipe between the plate heat exchanger 1 and the heat collecting tank 29; a heat medium water circulating water pump 31 is arranged on the connecting pipe between the solar collector 30 and the heat collecting tank 29; and an auxiliary electric heating system 32 is also arranged on the heat collecting tank 29.

[0023] Furthermore, the water outlet of the plate heat exchanger 1 is also connected to the underground water tank (drain tank) through the first bypass; a thirteenth valve 24 (drain valve) is provided on the first bypass; the water in the underground water tank (drain tank) is replenished to the circulating water system and the solar heating system through the filling pump 7.

[0024] Furthermore, a third remote thermometer 10, a third valve 14, a fifth valve 16, a sixth valve 17, a first remote thermometer 8, a second valve 13, a second remote thermometer 9 and a first valve 12 are arranged on the circulation loop connecting the plate heat exchanger 1 and the circulating water system; the first valve 12 is arranged on a second bypass connecting the water outlet and the return end of the plate heat exchanger 1; the first remote thermometer 8 is arranged at the water inlet end of the first circulating water pump 3; the second remote thermometer 9 is arranged at the return end of the plate heat exchanger 1, and the second valve 13 is arranged at the front end of the second remote thermometer 9; the third remote thermometer 10 is arranged at the water outlet end of the plate heat exchanger 1, and the third valve 14 is arranged at the rear end of the third remote thermometer 10.

[0025] Furthermore, a fourth remote thermometer 11 is provided at the water outlet of the water filling pump 7 , and a fourth valve 15 is provided on the water supply pipe connecting the water filling pump 7 and the plate heat exchanger 1 .

[0026] Furthermore, the selection of the solar collector 30, the water collection tank 29, the auxiliary electric heating system 32, the plate heat exchanger 1, the heat medium water circulation pump 31 and the closed circulation pump 33 is determined by calculation based on the external meteorological conditions, the water volume in the circulating water system, the temperature rise of the circulating water and the heat exchange efficiency. The number of the closed circulation pump 33 and the heat medium water circulation pump 31 is not less than 2, and 1 spare is set.

[0027] Further, the dry-wet combined cooling tower comprises a dry section 5 and a wet section 6 arranged in series; the water outlet end of the dry section 5 is connected to the water inlet end of the wet section 6; the water inlet end of the dry section 5 is connected to the water outlet end of the plate heat exchanger 1; the water outlet end of the wet section 6 is connected to the first circulating water pump 3; a third bypass is also arranged at the water outlet end of the dry section 5 and is connected to the first circulating water pump 3; a seventh valve 18 is arranged on the third bypass; an eighth valve 19 and a tenth valve 21 are respectively arranged at the two water inlet ends of the wet section 6; A ninth valve 20 and an eleventh valve 22 are respectively provided at the two outlet ends of the wet section 6; the outlet water of the dry section 5 is also connected to the underground water tank (draining water tank) through the fourth bypass, and a twelfth valve 23 (draining valve) is provided on the fourth bypass; the inlet water of the wet section 6 is connected to the underground water tank through the fifth bypass, and a fourteenth valve 25 (draining valve) is provided on the fifth bypass; the outlet water of the wet section 6 is connected to the underground water tank through the sixth bypass, and a fifteenth valve 26 (draining valve) is provided on the sixth bypass.

[0028] Furthermore, a sixteenth valve 27 is provided on the pipeline connecting the total outlet water of the dry section 5 and the total inlet water of the wet section 6 ; a seventeenth valve 28 is provided on the pipeline connecting the total outlet water of the wet section 6 and the first circulating water pump 3 .

[0029] A method for operating a solar antifreeze system for a compressed air energy storage cooling tower, comprising the following: During the winter operation of the compressed air energy storage power station, due to the low temperature, only the dry section 5 of the dry-wet combined cooling tower is in operation. At this time, the eighth valve 19 and the tenth valve 21 at the two water inlet ends of the wet section 6 and the ninth valve 20 and the eleventh valve 22 at the two water outlet ends are closed, and the seventh valve 18 on the third bypass is opened at the same time. At the same time, the sixteenth valve 27 and the seventeenth valve 28 are closed, and the fourteenth valve 25 and the fifteenth valve 26 are opened to drain the water in the wet section 6; During the day, the solar collector 30 heats the heat medium water at 25°C to 65°C (adjustable) and stores it in the heat collection tank 29. When the sunshine intensity or sunshine duration is insufficient to heat the heat medium water to 65°C (adjustable), the auxiliary electric heating system 32 is turned on to heat the heat medium water in the heat collection tank 29 to 65°C (adjustable). During the non-operation period of the compressed air energy storage power station in winter, the air inlet shutters of the dry section 5 and the cooling tower fan are closed, the first circulating water pump 3 is operated at a variable frequency, and the circulating water flow rate is maintained at 20%-40% of the normal flow rate (adjustable), and the first valve is closed at the same time. 12. Open the second valve 13 and the third valve 14. When the temperature at the first remote thermometer 8 or the second remote thermometer 9 drops to 8°C (adjustable), the closed circulation water pump 33 starts to run, and the heat medium water at 65°C (adjustable) in the heat collecting tank 29 is used to supplement heat to the circulating water system through the plate heat exchanger 1. When the temperature at the third remote thermometer 10 rises to 20°C, the closed circulation water pump 33 operates at a low speed or stops running, and the first circulation water pump 3 is kept running continuously, so that the circulating water temperature is always kept within the range of 8°C-20°C (adjustable); During winter maintenance, open the twelfth valve 23 and the thirteenth valve 24 to drain the water in the entire antifreeze system into the underground water tank (empty the water tank); When the dry section 5 in the dry-wet combined cooling tower is filled with water in winter, if the temperature at the fourth remote thermometer 11 is higher than 18°C ​​(adjustable), the fourth valve 15 is closed, the fifth valve 16 and the sixth valve 17 are opened, and the water in the underground water tank (empty water tank) directly enters the dry-wet combined cooling tower; if the temperature at the fourth remote thermometer 11 is lower than 18°C ​​(adjustable), the second valve 13, the fifth valve 16 and the sixth valve 17 are closed, the fourth valve 15 and the third valve 14 are opened, and the closed circulation water pump 33 is started, and the water in the ground water tank (empty water tank) is heated to 18°C ​​(adjustable) by the plate heat exchanger 1 and then enters the dry-wet combined cooling tower.

[0030] It should be noted that Figure 1 Only the key systems and valves are marked in the figure. Taking the split dry-wet combined cooling tower as an example, the principle of the integrated dry-wet cooling tower is the same and will not be repeated here.

[0031] In summary, the present invention utilizes the solar heating system to heat the circulating water during the shutdown of the compressed air energy storage power station and the water filling in winter, thereby avoiding the freezing of the dry-wet combined cooling tower and making the operation mode of the dry-wet combined cooling tower consistent with the operation mode of the main engine (compression condition, energy storage condition, intermittent alternating operation).

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solar antifreeze system for a compressed air energy storage cooling tower, comprising a circulating water system consisting of an auxiliary heat exchanger (2), a first circulating water pump (3) arranged in a circulating water pump room, a high-level water tank (4), a dry-wet combined cooling tower, an underground water storage tank, a water filling pump (7) arranged in the underground water storage tank, various connecting pipes and a control system, characterized in that: It also includes a solar heating system which is connected with the circulating water system and can heat the circulating water; and a plurality of remote thermometers and a plurality of valves are arranged on each connecting pipeline.

2. A solar antifreeze system for a compressed air energy storage cooling tower according to claim 1, characterized in that: The solar heating system comprises a plate heat exchanger (1) arranged in the circulating water pump room and connected to the circulating water system; a heat collecting tank (29) connected to the plate heat exchanger (1) and a solar collector (30) connected to the heat collecting tank (29) are arranged outside the circulating water pump room; a closed circulation water pump (33) is arranged on the connecting pipe between the plate heat exchanger (1) and the heat collecting tank (29); a heat medium water circulation water pump (31) is arranged on the connecting pipe between the solar collector (30) and the heat collecting tank (29); and an auxiliary electric heating system (32) is also arranged on the heat collecting tank (29).

3. A solar antifreeze system for a compressed air energy storage cooling tower according to claim 2, characterized in that: The water outlet of the plate heat exchanger (1) is connected to the underground water storage tank via a first bypass; a thirteenth valve (24) is provided on the first bypass; the water in the underground water storage tank is supplied to the circulating water system and the solar heating system via a filling pump (7).

4. A solar antifreeze system for a compressed air energy storage cooling tower according to claim 2, characterized in that: A third remote thermometer (10), a third valve (14), a fifth valve (16), a sixth valve (17), a first remote thermometer (8), a second valve (13), a second remote thermometer (9) and a first valve (12) are arranged on a circulation loop connecting the plate heat exchanger (1) and the circulating water system; the first valve (12) is arranged on a second bypass connecting the water outlet and the return water end of the plate heat exchanger (1); the first remote thermometer (8) is arranged at the water inlet of the first circulating water pump (3); the second remote thermometer (9) is arranged at the return water end of the plate heat exchanger (1), and the second valve (13) is arranged at the front end of the second remote thermometer (9); the third remote thermometer (10) is arranged at the water outlet of the plate heat exchanger (1), and the third valve (14) is arranged at the rear end of the third remote thermometer (10).

5. A solar antifreeze system for a compressed air energy storage cooling tower according to claim 2, characterized in that: A fourth remote thermometer (11) is provided at the water outlet of the water filling pump (7), and a fourth valve (15) is provided on the water supply pipe connecting the water filling pump (7) and the plate heat exchanger (1).

6. A solar antifreeze system for a compressed air energy storage cooling tower according to claim 2, characterized in that: The selection of the solar collector (30), the heat collection tank (29), the auxiliary electric heating system (32), the plate heat exchanger (1), the heat medium water circulation pump (31) and the closed circulation pump (33) is determined by calculation based on external meteorological conditions, the amount of water in the circulating water system, the temperature rise of the circulating water and the heat exchange efficiency. The number of the closed circulation pump (33) and the heat medium water circulation pump (31) is not less than 2, and 1 is provided as a spare.

7. A solar antifreeze system for a compressed air energy storage cooling tower according to claim 2, characterized in that: The dry-wet combined cooling tower comprises a dry section (5) and a wet section (6) arranged in series; the water outlet end of the dry section (5) is connected to the water inlet end of the wet section (6); the water inlet end of the dry section (5) is connected to the water outlet end of the plate heat exchanger (1); the water outlet end of the wet section (6) is connected to the first circulating water pump (3); a third bypass is also arranged at the water outlet end of the dry section (5) and is connected to the first circulating water pump (3); a seventh valve (18) is arranged on the third bypass; and eighth valves are respectively arranged at the two water inlet ends of the wet section (6). (19) and a tenth valve (21); a ninth valve (20) and an eleventh valve (22) are respectively arranged at the two outlet ends of the wet section (6); the outlet water of the dry section (5) is also connected to the underground water storage tank through a fourth bypass, and a twelfth valve (23) is arranged on the fourth bypass; the inlet water of the wet section (6) is connected to the underground water storage tank through a fifth bypass, and a fourteenth valve (25) is arranged on the fifth bypass; the outlet water of the wet section (6) is connected to the underground water storage tank through a sixth bypass, and a fifteenth valve (26) is arranged on the sixth bypass.

8. A solar antifreeze system for a compressed air energy storage cooling tower according to claim 7, characterized in that: A sixteenth valve (27) is provided on the pipeline connecting the total water outlet of the dry section (5) and the total water inlet of the wet section (6); a seventeenth valve (28) is provided on the pipeline connecting the total water outlet of the wet section (6) and the first circulating water pump (3).

9. An operating method of a solar antifreeze system for a compressed air energy storage cooling tower according to any one of claims 1 to 8, characterized in that: Includes the following: During the winter operation of the compressed air energy storage power station, due to the low temperature, only the dry section (5) of the dry-wet combined cooling tower is operated. At this time, the eighth valve (19) and the tenth valve (21) at the two water inlet ends of the wet section (6) and the ninth valve (20) and the eleventh valve (22) at the two water outlet ends are closed, and the seventh valve (18) on the third bypass is opened. At the same time, the sixteenth valve (27) and the seventeenth valve (28) are closed, and the fourteenth valve (25) and the fifteenth valve (26) are opened to drain the water in the wet section (6); During the day, the solar collector (30) heats the heat medium water at 25°C to 65°C and stores it in the heat collection tank (29). When the sunshine intensity or sunshine duration is insufficient to heat the heat medium water to 65°C, the auxiliary electric heating system (32) is turned on to heat the heat medium water to 65°C. During the non-operation period of the compressed air energy storage power station in winter, the air inlet shutters of the dry section (5) and the cooling tower fan are closed, the first circulating water pump (3) is operated at a variable frequency, and the circulating water flow rate is maintained at 20%-40% of the normal flow rate. At the same time, the first valve (12) is closed and the second valve ( 13) and the third valve (14), when the temperature at the first remote thermometer (8) or the second remote thermometer (9) drops to 8°C, the closed circulation water pump (33) starts to operate, and uses the 65°C heat medium water in the heat collection tank (29) to supplement heat to the circulating water system through the plate heat exchanger (1); when the temperature at the third remote thermometer (10) rises to 20°C, the closed circulation water pump (33) operates at a low speed or stops operating, while the first circulation water pump (3) is kept running continuously, so that the circulating water temperature is always kept within the range of 8°C-20°C; During winter maintenance, the twelfth valve (23) and the thirteenth valve (24) are opened to drain the water in the entire antifreeze system into the underground water storage tank; When the dry section (5) in the dry-wet combined cooling tower is filled with water in winter, if the temperature at the fourth remote thermometer (11) is higher than 18°C, the fourth valve (15) is closed, the fifth valve (16) and the sixth valve (17) are opened, and the water in the underground water storage tank directly enters the dry-wet combined cooling tower; if the temperature at the fourth remote thermometer (11) is lower than 18°C, the second valve (13), the fifth valve (16) and the sixth valve (17) are closed, the fourth valve (15) and the third valve (14) are opened, and the closed-loop circulation water pump (33) is started, and the water in the ground water storage tank is heated to 18°C ​​by the plate heat exchanger (1) and then enters the dry-wet combined cooling tower.

10. The method for operating a solar antifreeze system for a compressed air energy storage cooling tower according to claim 9, characterized in that: Each temperature and flow rate can be adjusted and set according to the actual situation on site.

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