A compressed air energy storage system in a vertical shaft and an installation method thereof

Abstract

The present invention relates to the field of electric energy storage technology, specifically to a compressed air energy storage system located in a vertical shaft and an installation method, comprising a storage tank and an air compressor, wherein the storage tank is buried in a deep well, the bottom of the circumferential surface of the storage tank is fixedly connected to an air outlet pipe, and the top of the storage tank is fixedly connected to a top cover; the middle of the top cover is fixedly connected to a pressure relief valve, and the top of the top cover is fixedly connected to a pressure gauge; the present invention can store excess electricity in a power storage box when electricity consumption is low, and when the power storage box is fully charged, the remaining electricity will be used to power the air compressor, and the air compressor will compress the air and store it through the storage tank; thereby, electric energy can be stored, and compressed air can be used to store energy after the electric energy storage is completed, thereby increasing energy utilization; during peak electricity consumption, the electricity in the power storage box is first used to supplement energy supply, and when the electricity in the power storage box is exhausted, the compressed air is used to drive the steam turbine to generate electricity.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to a compressed air energy storage system located in a vertical shaft and an installation method thereof. Background Art

[0002] Compressed air energy storage (CAES) uses electricity to compress air during periods of low grid load, releasing the compressed air to drive steam turbines for power generation during peak grid load periods. Because underground salt caverns are unavailable or expensive to mine in some areas, compressed air storage tanks can be placed in vertical shafts. These shafts also do not occupy ground space, reducing land use.

[0003] Considering that the existing technology usually stores energy in salt caverns, but in some areas there may be no underground salt caverns or it may be inconvenient to mine, it will be necessary to dig deep wells on the ground and store compressed air; considering that when the air compressor compresses the air, the air pressure in the storage tank will increase, and a pressure-heating effect will occur, and the temperature will rise as the air pressure increases. At this time, the temperature of the compressed air is related to the air pressure; the existing technology usually uses the heat generated by the pressure-heating effect, but it will also cause the air pressure of the compressed air to drop. When the air pressure of the compressed air is reduced, the thrust in the subsequent power generation will be reduced, which will make it impossible to drive the steam turbine, thereby reducing the power generation and power generation efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a compressed air energy storage system located in a vertical shaft and an installation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a compressed air energy storage system located in a vertical shaft, comprising a storage tank and an air compressor. The storage tank is buried in a deep well, an air outlet pipe is fixedly connected to the bottom of the circumferential surface of the storage tank, and a top cover is fixedly connected to the top of the storage tank; a pressure relief valve is fixedly connected to the middle of the top cover, a pressure gauge is fixedly connected to the top of the top cover, and an air inlet pipe is fixedly connected to the top of the top cover; the end of the air inlet pipe away from the top cover is fixedly connected to the air compressor; the air compressor is placed on the ground and electrically connected to a power storage box;

[0007] The top of the top cover is fixedly connected to a heat conduction unit, and the bottom of the top cover located on the air inlet pipe is fixedly connected to a kinetic energy recovery unit.

[0008] Furthermore, the heat conduction unit includes a heat exchanger and a heat conduction ring, the heat conduction ring is fixedly connected to the air compressor; the heat exchanger is fixedly connected to the top cover, the bottom of the heat exchanger is fixedly connected to a heat conduction block, and the bottom of the heat conduction block is fixedly connected to a first heat exchange plate; the heat exchanger is provided with a plurality of heat exchange ports on the side close to the air compressor, a heat conduction pipe is fixedly connected in the heat exchange port, and the heat conduction pipe is fixedly connected to the heat conduction ring; a cold exchange port is provided on one side of the heat exchanger, and a cold liquid pipe is fixedly connected in the cold exchange port.

[0009] Furthermore, a second heat exchange plate is fixedly connected to the bottom of the first heat exchange plate.

[0010] Furthermore, a plurality of protrusions are fixedly connected to the surface of the first heat exchange plate, and a plurality of protrusions are fixedly connected to the surface of the second heat exchange plate near the bottom.

[0011] Furthermore, a plurality of guide plates are alternately fixedly connected to the surface of the second heat exchange plate, and the surface of the guide plates is rough.

[0012] Furthermore, the kinetic energy recovery unit includes a bracket, which is fixedly connected to the top cover, a cavity is opened in the middle of the bracket, the bottom of the cavity is rotatably connected to an impeller, and the inner wall of the cavity is fixedly connected to a permanent magnet; the outer wall of the impeller located in the cavity is fixedly connected to a plurality of coil frames, the surface of the coil frames are fixedly connected to copper coils, and the coil frames are slidably connected to the permanent magnets.

[0013] Furthermore, a sandwich plate is fixedly connected to the inner wall of the storage tank, and a heat-insulating material is filled between the storage tank and the sandwich plate.

[0014] A compressed air energy storage system located in a vertical shaft is provided. The installation method of the system is as follows:

[0015] S1. During installation, first install the air outlet pipe at the bottom of the storage tank, then place the storage tank in the deep well and secure it with the top cover. Then place the air compressor on the ground and connect the air compressor and storage tank through the air inlet pipe. Finally, check the sealing of the storage tank. Once completed, it can be put into use.

[0016] S2. During low electricity consumption periods, the excess electricity can be used to power the air compressor, which then delivers compressed air through the air inlet pipe to the storage tank for storage.

[0017] S3. After the compressed air enters the storage tank, the heat transfer unit heats the compressed air, thereby increasing the compressed air pressure and reducing the amount of compressed air required by the storage tank. If the compressed air pressure is too high, the heat transfer unit cools the compressed air, thereby reducing the compressed air pressure.

[0018] During peak electricity consumption, the high power consumption will lead to a large consumption of fuel resources by using only traditional power generation methods. At this time, the compressed air in the storage tank is guided to the power generation equipment through the outlet pipe, and the compressed air drives the turbine to rotate, thereby reducing fuel consumption.

[0019] The present invention has the following beneficial effects:

[0020] 1. The present invention can store excess electricity in a power storage box during low electricity consumption. When the power storage box is fully charged, the remaining electricity will be used to power an air compressor, which will compress the air and store it in a storage tank. In this way, electrical energy can be stored, and compressed air can be used to store energy after the electrical energy storage is completed, thereby increasing energy utilization. During peak electricity consumption, the electricity in the power storage box is first used to supplement energy supply. When the electricity in the power storage box is exhausted, compressed air is used to drive the steam turbine to generate electricity.

[0021] 2. In the present invention, when the air pressure in the storage tank is too high, the excess temperature is transferred to the heat exchanger through the first heat exchange plate, and a liquid with a lower temperature can be input into the heat exchanger through the cold liquid pipe to exchange heat with the high-temperature liquid in the heat exchanger, thereby lowering the temperature of the compressed air. Since the activity amplitude of the molecules is reduced, the air pressure of the compressed air can be reduced. By reducing the air pressure through temperature conduction, the excess temperature can be reused, thereby reducing the air discharged from the pressure relief valve and increasing energy utilization.

[0022] 3. The present invention will prioritize lowering the temperature of the top air when lowering the temperature of the compressed air. When the top pressure is reduced, the air discharged from the pressure relief valve will be reduced, which can increase resource utilization. After the air pressure at the top is reduced, the air at the bottom will fill upward, thereby reducing the air pressure at the bottom. Subsequently, the air pressure at the bottom will be further reduced through the second heat exchange plate, thereby avoiding excessive compressed air pressure at the bottom of the tank, thereby preventing explosion caused by excessive pressure.

[0023] 4. The present invention uses a guide plate to guide air to air, which can make the air flow smoother and thus make the air pressure more balanced; when the second heat exchange plate is exchanging heat, the guide plate can be used for heat conduction, and the heat exchange area can be larger, thereby further increasing the efficiency of heat exchange and reducing the demand for compressed air; because the surface of the guide plate is rough, the air will rub against the guide plate when passing through, and the friction will cause the air temperature to rise, at this time, the air pressure of the compressed air can be increased, thereby reducing the amount of air compressed by the air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic diagram of the overall installation state of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the overall split structure of the present invention;

[0028] Figure 4 It is an overall internal cross-sectional view of the present invention;

[0029] Figure 5 For the present invention Figure 4 A partial enlarged view of the middle part;

[0030] Figure 6 This is a structural diagram of the heat transfer unit of the present invention (excluding the second heat exchange plate);

[0031] Figure 7 This is an exploded view of the kinetic energy recovery unit of the present invention;

[0032] Figure 8 This is a schematic diagram of the installation process of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] In the figure: 1. Storage tank; 11. Interlayer plate; 12. Top cover; 13. Pressure relief valve; 14. Pressure gauge; 15. Air inlet pipe; 16. Air outlet pipe; 2. Heat transfer unit; 21. Heat exchanger; 211. Heat exchange port; 212. Cold exchange port; 213. Cold liquid pipe; 22. Heat transfer ring; 221. Heat transfer pipe; 23. First heat exchange plate; 24. Second heat exchange plate; 25. Guide plate; 26. Bump; 3. Kinetic energy recovery unit; 31. Bracket; 32. Impeller; 33. Permanent magnet; 34. Coil frame; 35. Copper coil; 4. Air compressor. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-8 As shown, the present invention is a compressed air energy storage system located in a vertical shaft, comprising a storage tank 1 and an air compressor 4. The storage tank 1 is buried in a deep well, and an air outlet pipe 16 is fixedly connected to the bottom of the circumferential surface of the storage tank 1, and a top cover 12 is fixedly connected to the top of the storage tank 1; a pressure relief valve 13 is fixedly connected to the middle of the top cover 12, a pressure gauge 14 is fixedly connected to the top of the top cover 12, and an air inlet pipe 15 is fixedly connected to the top of the top cover 12; the end of the air inlet pipe 15 away from the top cover 12 is fixedly connected to the air compressor 4; the air compressor 4 is placed on the ground and electrically connected to the power storage box;

[0037] The top of the top cover 12 is fixedly connected to the heat conduction unit 2 , and the bottom of the top cover 12 located at the air inlet pipe 15 is fixedly connected to the kinetic energy recovery unit 3 .

[0038] In this embodiment, considering that the existing technology usually stores energy in salt caverns, but some areas may not have underground salt caverns or it may be inconvenient to mine, it is necessary to dig deep wells on the ground and store compressed air; considering that when the air compressor 4 compresses the air, the air pressure in the storage tank 1 will increase, and a pressure-heating effect will occur, and the temperature will rise as the air pressure increases. At this time, the temperature of the compressed air is related to the air pressure; the existing technology usually uses the heat generated by the pressure-heating effect, but it will also cause the air pressure of the compressed air to drop. When the air pressure of the compressed air is reduced, the thrust in the subsequent power generation will be reduced, which will make it impossible to drive the steam turbine, thereby reducing the power generation and power generation efficiency;

[0039] During low electricity consumption, due to the low power consumption, the excess electricity can be stored in the power storage box. When the power storage box is fully charged, the remaining electricity will be used to power the air compressor 4. After the air compressor 4 is powered, the air compressor 4 will compress the air and transport it to the storage tank 1 through the air inlet pipe 15 for storage. In this way, electrical energy can be stored, and after the electrical energy storage is completed, the compressed air can be used for energy storage and subsequently used to generate electricity, thereby increasing the utilization rate of energy.

[0040] After the compressed air enters the storage tank 1, the heat transfer unit 2 is provided to heat the compressed air, thereby increasing the pressure of the compressed air. This allows the same volume of air to obtain a higher pressure, reduces the amount of compressed air required by the storage tank 1, and reduces the energy required to store the compressed air. When the compressed air pressure is too high, the heat transfer unit 2 can be used to cool the compressed air, thereby reducing the pressure of the compressed air and reducing the amount of air discharged from the pressure relief valve 13. The temperature of the compressed air can be used for other purposes, thereby increasing energy utilization.

[0041] During peak hours of electricity consumption, due to the high power consumption, using only traditional power generation methods will result in a large consumption of fuel resources. At this time, the power in the power storage box is first used to supplement the energy supply. When the power in the power storage box is exhausted, the compressed air in the storage tank 1 is guided to the power generation equipment through the outlet pipe 16, and the compressed air is used to drive the turbine to rotate, thereby reducing fuel usage.

[0042] Specifically, the heat conduction unit 2 includes a heat exchanger 21 and a heat conduction ring 22, and the heat conduction ring 22 is fixedly connected to the air compressor 4; the heat exchanger 21 is fixedly connected to the top cover 12, and the bottom of the heat exchanger 21 is fixedly connected to a heat conduction block, and the bottom of the heat conduction block is fixedly connected to a first heat exchange plate 23; the heat exchanger 21 is provided with a plurality of heat exchange ports 211 on the side close to the air compressor 4, and a heat conduction pipe 221 is fixedly connected to the heat exchange port 211, and the heat conduction pipe 221 is fixedly connected to the heat conduction ring 22; a cold exchange port 212 is provided on one side of the heat exchanger 21, and a cold liquid pipe 213 is fixedly connected to the cold exchange port 212.

[0043] In this embodiment, it is considered that when the air compressor 4 compresses the air, it will cause the air to produce a thermal pressure effect, and the heat of the compressed air will be transferred to the air compressor 4. At the same time, the air compressor 4 itself will also generate heat when in use.

[0044] When compressing air, the heat conducting ring 22 can transfer the temperature of the air compressor 4 through the heat conducting pipe 221 and transfer the heat to the heat exchanger 21. At this time, heat is exchanged through the heat exchanger 21, the heat conducting block and the first heat exchange plate 23. When the heat is transferred to the storage tank 1 through the heat exchange plate, the temperature of the compressed air in the storage tank 1 will rise. When the temperature of the compressed air rises, the movement of molecules will increase, and the air pressure will also increase. When the air pressure increases, the air required by the air compressor 4 can be reduced, thereby reducing the energy required by the air compressor 4. The excess energy can be provided to other equipment for use, or more storage tanks 1 can be filled to maximize resource utilization.

[0045] When the air pressure in the storage tank 1 is too high, the excess temperature is conducted to the heat exchanger 21 through the first heat exchange plate 23, and a liquid with a lower temperature can be input into the heat exchanger 21 through the cold liquid pipe 213, and heat exchange is performed with the high-temperature liquid in the heat exchanger 21, thereby lowering the temperature of the compressed air. Since the activity amplitude of the molecules is reduced, the air pressure of the compressed air can be reduced; by reducing the air pressure through temperature conduction, the excess temperature can be reused, thereby reducing the air discharged from the pressure relief valve 13 and increasing energy utilization.

[0046] Specifically, the bottom of the first heat exchange plate 23 is fixedly connected to the second heat exchange plate 24 .

[0047] In this embodiment, it is considered that the pressure of the deeper storage tank 1 will produce a pressure difference. For example, in a storage tank 1 that is more than 100 meters deep, a pressure difference will occur between the pressure at the top and bottom of the storage tank 1. The higher the height of the storage tank 1, the greater the pressure difference will be. In this case, the pressure at the bottom of the tank 1 will be higher, and it will also be impossible to accurately judge the air pressure at the bottom of the storage tank 1. If the judgment is made only by the pressure gauge 14, the pressure at the bottom of the storage tank 1 may be too high, which may cause the tank body to be unable to withstand the pressure and explode.

[0048] By setting the second heat exchange plate 24, heat exchange can be performed with the first heat exchange plate 23 when the pressure in the storage tank 1 is relatively high, so that the air pressure at the top and bottom of the storage tank 1 is more balanced. Moreover, since the first heat exchange plate 23 is at the top, when the temperature of the compressed air is lowered, the temperature of the top air will be lowered first. When the top pressure is reduced, the air discharged from the pressure relief valve 13 will be reduced, which can increase the utilization rate of resources. After the air pressure at the top is reduced, the air at the bottom will fill upward, thereby reducing the air pressure at the bottom, and subsequently the second heat exchange plate 24 will be used to further reduce the air pressure at the bottom, thereby avoiding excessive pressure of the compressed air at the bottom of the storage tank 1, thereby preventing explosion caused by excessive pressure.

[0049] Specifically, a plurality of protrusions 26 are fixedly connected to the surface of the first heat exchange plate 23 , and a plurality of protrusions 26 are fixedly connected to the surface of the second heat exchange plate 24 near the bottom.

[0050] In this embodiment, considering that the air compression efficiency of the air compressor 4 is relatively high, the heat transfer unit 2 may not be efficient enough to significantly increase the air pressure until the compressed air enters. In this case, the compressed air pressure in the storage tank 1 will continue to rise after the air compressor 4 stops, and the compressed air in the storage tank 1 will not be significantly reduced, resulting in low resource utilization.

[0051] By setting the protrusions 26, the heat exchange area of ​​the first heat exchange plate 23 and the second heat exchange plate 24 can be increased during heat exchange, thereby increasing the heat exchange efficiency. Moreover, since the second heat exchange plate 24 is only provided with the protrusions 26 on the surface near the bottom, the heat exchange efficiency of the middle part of the storage tank 1 will be reduced during heat exchange, and the heat exchange efficiency of the bottom part of the storage tank 1 will be increased. Since multiple protrusions 26 are provided on the top and bottom of the storage tank 1, the air pressure in the middle part of the storage tank 1 will be higher when the air pressure is reduced. At this time, the compressed air in the middle part of the storage tank 1 will flow to the top and bottom, and the air pressure will tend to be stable. The internal air pressure can be made more balanced through the flow of compressed air.

[0052] Specifically, a plurality of guide plates 25 are alternately fixedly connected to the surface of the second heat exchange plate 24 , and the surface of the guide plates 25 is rough.

[0053] In this embodiment, the arrangement of the guide plates 25 allows the compressed air to flow between the guide plates 25 after entering, and the guide plates 25 can be used to distinguish different pressures, and the guide plates 25 can be used to guide air to air, which can make the air flow smoother and thus make the air pressure more balanced; since the guide plates 25 are fixed to the second heat exchange plate 24, heat can be conducted through the guide plates 25 when the second heat exchange plate 24 is performing heat exchange, and the heat exchange area can be made larger, thereby further increasing the efficiency of the heat exchange and reducing the demand for compressed air; since the surface of the guide plates 25 is rough, the air will rub against the guide plates 25 when passing through, and the friction will cause the air temperature to rise, at which time the air pressure of the compressed air can be increased, thereby reducing the amount of air compression by the air compressor 4.

[0054] Specifically, the kinetic energy recovery unit 3 includes a bracket 31, which is fixedly connected to the top cover 12. A cavity is opened in the middle of the bracket 31, and the bottom of the cavity is rotatably connected to an impeller 32. The inner wall of the cavity is fixedly connected to a permanent magnet 33; the outer wall of the impeller 32 located in the cavity is fixedly connected to a plurality of coil frames 34, and the surface of the coil frames 34 is fixedly connected to a copper coil 35, and the coil frames 34 are slidably connected to the permanent magnet 33.

[0055] In this embodiment, it is considered that when the air is compressed by the air compressor 4, the compressed air will have a large kinetic energy when entering the storage tank 1;

[0056] By setting the bracket 31 and the impeller 32, the compressed air can contact the impeller 32 when entering and rotate the impeller 32. At this time, the impeller 32 will drive the coil frame 34 and the copper coil 35 to rotate, thereby generating electricity. Since the power generation is low, the generated electricity can be used to supplement the power supply of the equipment in the system, thereby converting the kinetic energy of the compressed air when entering the storage tank 1 into electrical energy, which can increase the utilization rate of resources, and can slow down the compressed air when entering through the impeller 32 to prevent the compressed air from impacting the storage tank 1 for a long time, causing friction or corrosion.

[0057] Specifically, a sandwich plate 11 is fixedly connected to the inner wall of the storage tank 1 , and a heat-insulating material is filled between the storage tank 1 and the sandwich plate 11 .

[0058] In this embodiment, considering that the storage tank 1 is in direct contact with concrete in the deep well, the high-temperature compressed air may conduct heat to the outside through the storage tank 1, which may cause heat loss and waste.

[0059] By setting the sandwich plate 11, insulation material can be filled between the storage tank 1 and the sandwich plate 11, thereby preventing the internal high temperature from escaping to the outside. Since compressed air is stored inside the storage tank 1, vacuum insulation cannot be used between the sandwich plate 11 and the storage tank 1, and multiple reinforcing ribs are required for support to prevent the high-pressure compressed air from causing the sandwich plate 11 to deform. At the same time, since the sandwich plate 11 is located inside the storage tank 1, it can prevent the compressed air from directly contacting the storage tank 1 when storing compressed air, preventing the storage tank 1 from being deformed or ruptured due to excessive air pressure.

[0060] A compressed air energy storage system located in a vertical shaft is provided. The installation method of the system is as follows:

[0061] During installation, first install the air outlet pipe 16 at the bottom of the storage tank 1. Then, place the storage tank 1 in the deep well and secure it with the top cover 12. Then, place the air compressor 4 on the ground and connect the air compressor 4 to the storage tank 1 through the air inlet pipe 15. Finally, check the sealing of the storage tank 1. Once completed, it can be put into use.

[0062] S2. During low electricity consumption, the excess electricity can be used to supply power to the air compressor 4, which then delivers the compressed air through the air inlet pipe 15 to the storage tank 1 for storage;

[0063] S3. After the compressed air enters the storage tank 1, the heat transfer unit 2 is set to heat the compressed air, thereby increasing the compressed air pressure and reducing the amount of compressed air required by the storage tank 1. When the compressed air pressure is too high, the heat transfer unit 2 can be used to cool the compressed air, thereby reducing the compressed air pressure.

[0064] S3. During peak electricity consumption, due to the high power consumption, only using traditional power generation methods will consume a lot of fuel resources. At this time, the compressed air in the storage tank 1 is guided to the power generation equipment through the outlet pipe 16, and the compressed air drives the turbine to rotate, thereby reducing fuel usage.

[0065] When using,

[0066] First, during off-peak hours, due to low power consumption, excess power can be stored in the power storage box. When the power storage box is fully charged, the remaining power will be used to power the air compressor 4. After the air compressor 4 is powered, the air compressor 4 will compress the air and transport it to the storage tank 1 through the air inlet pipe 15 for storage. In this way, electrical energy can be stored, and after the electrical energy storage is completed, the compressed air can be used for energy storage and subsequently used to generate electricity, thereby increasing energy utilization.

[0067] By setting the bracket 31 and the impeller 32, the compressed air can contact the impeller 32 when entering and rotate the impeller 32. At this time, the impeller 32 will drive the coil frame 34 and the copper coil 35 to rotate, thereby generating electricity. Since the power generation is low, the generated electricity can be used to supplement the power supply of the equipment in the system, thereby converting the kinetic energy of the compressed air when entering the storage tank 1 into electrical energy, which can increase the utilization rate of resources, and can slow down the compressed air when entering through the impeller 32 to prevent the compressed air from impacting the storage tank 1 for a long time, causing friction or corrosion.

[0068] Secondly, when compressing air, the heat conducting ring 22 can transfer the temperature of the air compressor 4 through the heat conducting pipe 221 and transfer the heat to the heat exchanger 21. At this time, heat is exchanged through the heat exchanger 21, the heat conducting block and the first heat exchange plate 23. When the heat is transferred to the storage tank 1 through the heat exchange plate, the temperature of the compressed air in the storage tank 1 will rise. When the temperature of the compressed air rises, the movement of molecules will increase, and the air pressure will also increase. When the air pressure increases, the air required by the air compressor 4 can be reduced, thereby reducing the energy required by the air compressor 4. The excess energy can be provided to other equipment for use, or more storage tanks 1 can be filled to maximize resource utilization.

[0069] When the air pressure in the storage tank 1 is too high, the excess temperature is transferred to the heat exchanger 21 through the first heat exchange plate 23. Furthermore, a lower temperature liquid is introduced into the heat exchanger 21 through the cold liquid pipe 213 to exchange heat with the high temperature liquid in the heat exchanger 21, thereby lowering the temperature of the compressed air. This reduces the range of molecular activity and, therefore, the pressure of the compressed air. By reducing the air pressure through temperature transfer, the excess temperature can be reused, thereby reducing the amount of air discharged from the pressure relief valve 13 and increasing energy utilization.

[0070] By setting the second heat exchange plate 24, heat exchange can be performed with the first heat exchange plate 23 when the pressure in the storage tank 1 is relatively high, so that the air pressure at the top and bottom of the storage tank 1 is more balanced. Moreover, since the first heat exchange plate 23 is at the top, when the temperature of the compressed air is lowered, the temperature of the top air will be lowered first. When the top pressure is reduced, the air discharged from the pressure relief valve 13 will be reduced, which can increase the utilization rate of resources. After the air pressure at the top is reduced, the air at the bottom will fill upward, thereby reducing the air pressure at the bottom, and subsequently the second heat exchange plate 24 will be used to further reduce the air pressure at the bottom, thereby avoiding excessive pressure of the compressed air at the bottom of the storage tank 1, thereby preventing explosion caused by excessive pressure.

[0071] At the same time, by providing the protrusions 26, the heat exchange area can be increased between the first heat exchange plate 23 and the second heat exchange plate 24 during heat exchange, thereby increasing the heat exchange efficiency. Moreover, since the second heat exchange plate 24 is provided with the protrusions 26 only on the surface near the bottom, the heat exchange efficiency of the middle portion of the storage tank 1 is reduced during heat exchange, while the heat exchange efficiency of the bottom portion of the storage tank 1 is increased. Since the top and bottom portions of the storage tank 1 are both provided with multiple protrusions 26, the air pressure in the middle portion of the storage tank 1 is higher when the air pressure is reduced. At this time, the compressed air in the middle portion of the storage tank 1 flows toward the top and bottom portions, and the air pressure tends to be stable. The flow of compressed air can make the internal air pressure more balanced.

[0072] Through the arrangement of the guide plates 25, the compressed air can flow between the guide plates 25 after entering, and the guide plates 25 can be used to distinguish different pressures, and the guide plates 25 can be used to guide air to air, so that the air flow can be smoother, thereby making the air pressure more balanced; since the guide plates 25 are fixed to the second heat exchange plate 24, heat can be conducted through the guide plates 25 when the second heat exchange plate 24 is exchanging heat, and the heat exchange area can be larger, thereby further increasing the efficiency of heat exchange and reducing the demand for compressed air; since the surface of the guide plates 25 is rough, the air will rub against the guide plates 25 when passing through, and the friction will cause the air temperature to rise, at this time the air pressure of the compressed air can be increased, thereby reducing the amount of air compressed by the air compressor 4.

[0073] Finally, during peak hours, due to the high power consumption, using only traditional power generation methods will consume a lot of fuel resources. At this time, the power in the power storage box is first used to supplement the energy supply. When the power in the power storage box is exhausted, the compressed air in the storage tank 1 is guided to the power generation equipment through the outlet pipe 16, and the compressed air is used to drive the turbine to rotate, thereby reducing fuel usage.

[0074] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A compressed air energy storage system located in a vertical shaft, comprising a storage tank (1) and an air compressor (4), characterized in that: The storage tank (1) is buried in a deep well; the bottom of the circumferential surface of the storage tank (1) is fixedly connected to an air outlet pipe (16); the top of the storage tank (1) is fixedly connected to a top cover (12); the middle of the top cover (12) is fixedly connected to a pressure relief valve (13); the top of the top cover (12) is fixedly connected to a pressure gauge (14); the top of the top cover (12) is fixedly connected to an air inlet pipe (15); the end of the air inlet pipe (15) away from the top cover (12) is fixedly connected to an air compressor (4); the air compressor (4) is placed on the ground, and the air compressor (4) is electrically connected to a power storage box; The top of the top cover (12) is fixedly connected to a heat conduction unit (2), and the bottom of the top cover (12) located at the air inlet pipe (15) is fixedly connected to a kinetic energy recovery unit (3); The heat conduction unit (2) comprises a heat exchanger (21) and a heat conduction ring (22), wherein the heat conduction ring (22) is fixedly connected to the air compressor (4); the heat exchanger (21) is fixedly connected to the top cover (12), the bottom of the heat exchanger (21) is fixedly connected to a heat conduction block, and the bottom of the heat conduction block is fixedly connected to a first heat exchange plate (23); a plurality of heat exchange ports (211) are provided on a side of the heat exchanger (21) close to the air compressor (4), a heat conduction pipe (221) is fixedly connected to the heat exchange port (211), and the heat conduction pipe (221) is fixedly connected to the heat conduction ring (22); a cold exchange port (212) is provided on one side of the heat exchanger (21), and a cold liquid pipe (213) is fixedly connected to the cold exchange port (212).

2. The compressed air energy storage system in a vertical shaft according to claim 1, characterized in that: The bottom of the first heat exchange plate (23) is fixedly connected to a second heat exchange plate (24).

3. The compressed air energy storage system in a vertical shaft according to claim 2, characterized in that: A plurality of protrusions (26) are fixedly connected to the surface of the first heat exchange plate (23), and a plurality of protrusions (26) are fixedly connected to the surface of the second heat exchange plate (24) near the bottom.

4. The compressed air energy storage system in a vertical shaft according to claim 3, characterized in that: A plurality of guide plates (25) are alternately fixedly connected to the surface of the second heat exchange plate (24), and the surface of the guide plates (25) is rough.

5. The compressed air energy storage system in a vertical shaft according to claim 4, characterized in that: The kinetic energy recovery unit (3) includes a bracket (31), the bracket (31) is fixedly connected to the top cover (12), a cavity is provided in the middle of the bracket (31), the bottom of the cavity is rotatably connected to an impeller (32), and the inner wall of the cavity is fixedly connected to a permanent magnet (33); the outer wall of the impeller (32) located in the cavity is fixedly connected to a plurality of coil frames (34), the surface of each coil frame (34) is fixedly connected to a copper coil (35), and the coil frame (34) is slidably connected to the permanent magnet (33).

6. The compressed air energy storage system in a vertical shaft according to claim 5, characterized in that: The inner wall of the storage tank (1) is fixedly connected with a sandwich plate (11), and a heat-insulating material is filled between the storage tank (1) and the sandwich plate (11).

7. A method for installing a compressed air energy storage system in a shaft according to claim 6 is provided, characterized in that: The installation method is as follows: S1. During installation, first install the air outlet pipe (16) at the bottom of the storage tank (1), then place the storage tank (1) in the deep well and cover it with the top cover (12) to secure it. Then place the air compressor (4) on the ground and connect the air compressor (4) and the storage tank (1) through the air inlet pipe (15). Finally, check the sealing of the storage tank (1). Once completed, it can be put into use. S2. During low electricity consumption, the excess electricity is used to supply power to the air compressor (4), which then delivers the compressed air through the air inlet pipe (15) to the storage tank (1) for storage; S3. After the compressed air enters the storage tank (1), the compressed air is heated by the heat transfer unit (2), thereby increasing the pressure of the compressed air and reducing the amount of compressed air required by the storage tank (1); when the compressed air pressure is too high, the compressed air is cooled by the heat transfer unit (2), thereby reducing the pressure of the compressed air; S4. During peak hours of electricity consumption, due to the high power consumption, only using traditional power generation methods will result in a large consumption of fuel resources. At this time, the compressed air in the storage tank (1) is guided to the power generation equipment through the outlet pipe (16), and the compressed air is used to drive the turbine to rotate, thereby reducing the use of fuel.

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