Compressed air energy storage system located in vertical shaft and installation method

Abstract

The invention relates to the technical field of electrical energy storage, in particular to a compressed air energy storage system located in a vertical shaft and an installation method.The compressed air energy storage system comprises a storage tank and an air compressor, the storage tank is buried in a deep well, the bottom of the circumferential face of the storage tank is fixedly connected with an air outlet pipe, and the top of the storage tank is fixedly connected with a top cover; the middle of the top cover is fixedly connected with a pressure release valve, and the top of the top cover is fixedly connected with a pressure gauge. According to the energy-saving and environment-friendly air conditioner, in the low ebb of electricity utilization, redundant electricity can be stored in the electricity storage box, after the electricity storage box is full of electricity, the remaining electricity can be supplied to the air compressor, the air compressor can compress air, and the air is stored in the storage tank; therefore, the electric energy can be stored, and the compressed air can be used for storing energy after the electric energy is stored, so that the utilization rate of the energy is increased; in the peak period of power utilization, power supply is supplemented through power in the power storage box, and after the power in the power storage box is used up, the steam turbine is pushed through compressed air to generate power.

Description

Technical Field

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

[0002] Compressed air energy storage refers to a method of storing energy by using electric energy to compress air during the low-load period of the power grid and releasing the compressed air to drive a steam turbine to generate electricity during the high-load period of the power grid. Since there are no underground salt caverns or the mining cost is relatively high in some areas, compressed air storage tanks placed in vertical shafts can be used for replacement. Moreover, vertical shafts do not occupy ground area and can reduce the occupation of land resources. Considering that the existing technology usually stores energy in salt caverns, but there may be no underground salt caverns or it is not convenient to mine in some areas. In this case, it is necessary to dig a deep well on the ground and store compressed air. Considering that when the air compressor compresses air, the air pressure in the storage tank will increase, and a pressure heat effect will be generated. When the air pressure increases, the temperature will rise. At this time, the temperature and air pressure of the compressed air are interrelated. The existing technology usually utilizes the heat generated by the pressure heat effect, but this will also cause the air pressure of the compressed air to drop. When the air pressure of the compressed air decreases, the thrust during subsequent power generation will also decrease, resulting in the inability to drive the steam turbine, thus reducing both the power generation amount and the power generation efficiency. Summary of the Invention

[0003] The purpose 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 background technique.

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention provides a compressed air energy storage system located in a vertical shaft, including 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. One 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 is electrically connected to a power storage box. A heat conduction unit is fixedly connected to the top of the top cover, and a kinetic energy recovery unit is fixedly connected to the bottom of the top cover where the air inlet pipe is located.

[0005] Further, the heat conduction unit includes a heat exchanger and a heat conduction ring, and the heat conduction ring is fixedly connected to the air compressor; the heat exchanger is fixedly connected to the top cover, a heat conduction block is fixedly connected to the bottom of the heat exchanger, and a first heat exchange plate is fixedly connected to the bottom of the heat conduction block; a plurality of heat exchange ports are formed on one side of the heat exchanger close to the air compressor, a heat conduction tube is fixedly connected in the heat exchange port, and the heat conduction tube is fixedly connected to the heat conduction ring; a cold exchange port is formed on one side of the heat exchanger, and a cold liquid tube is fixedly connected in the cold exchange port.

[0006] Further, a second heat exchange plate is fixedly connected to the bottom of the first heat exchange plate.

[0007] Further, a plurality of bumps are fixedly connected to the surface of the first heat exchange plate, and a plurality of bumps are fixedly connected to the surface of the second heat exchange plate close to the bottom.

[0008] Further, a plurality of flow guiding plates are alternately fixedly connected to the surface of the second heat exchange plate, and the surface of the flow guiding plate is rough.

[0009] Further, the kinetic energy recovery unit includes a bracket, the bracket is fixedly connected to the top cover, a cavity is formed in the middle of the bracket, an impeller is rotatably connected to the bottom of the cavity, and a permanent magnet is fixedly connected to the inner wall of the cavity; a plurality of coil holders are fixedly connected to the outer wall of the impeller located in the cavity, copper coils are fixedly connected to the surfaces of the coil holders, and the coil holders are slidably connected to the permanent magnet.

[0010] Further, 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.

[0011] A compressed air energy storage system located in a shaft, and now an installation method of the system is proposed. The installation method is as follows: S1. During installation, first install an air outlet pipe at the bottom of the storage tank, then place the storage tank in the deep well, cover the top cover and fix it, then place the air compressor on the ground, connect the air compressor and the storage tank through an air inlet pipe, and finally check the airtightness of the storage tank. After completion, it can be put into use; S2. During the low electricity consumption period, since the electricity consumption is relatively low, the excess electricity can be supplied to the air compressor. When the air compressor will transport the compressed air into the storage tank through the air inlet pipe for storage; S3. After the compressed air enters the storage tank, through the setting of the heat conduction unit, the compressed air can be heated, so that the air pressure of the compressed air can be greater, and the amount of compressed air required by the storage tank can be reduced; when the air pressure of the compressed air is too high, the heat conduction unit can be used to cool the compressed air, thereby reducing the air pressure of the compressed air; S3. During the peak electricity consumption period, due to the high electricity consumption, only traditional power generation methods will consume a large amount of fuel resources. At this time, the compressed air in the storage tank is guided to the power generation equipment through the air outlet pipe, and the steam turbine is driven to rotate by the compressed air, thereby reducing the use of fuel.

[0012] The present invention has the following beneficial effects: 1. During the low electricity consumption period, the present invention can store the excess electricity in the electricity storage box. When the electricity storage box is full, the remaining electricity will be supplied to the air compressor. The air compressor will compress the air and store it in the storage tank; thus, electrical energy can be stored, and after the electrical energy storage is completed, compressed air can be used for energy storage, thereby increasing the energy utilization rate. During the peak electricity consumption period, the electricity in the electricity storage box is first used for supplementary power supply. When the electricity in the electricity storage box is exhausted, the steam turbine is driven by compressed air to generate electricity.

[0013] 2. When the air pressure in the storage tank is too high, the present invention conducts the excess temperature to the heat exchanger through the first heat exchange plate, and cold liquid can be input into the heat exchanger through the cold liquid pipe and exchange heat with the high-temperature liquid in the heat exchanger, thereby reducing the temperature of the compressed air. Since the activity range of molecules is reduced, the air pressure of the compressed air can be reduced; reducing the air pressure by means of temperature conduction can reuse the excess temperature, thereby reducing the air discharged from the pressure relief valve and increasing the energy utilization rate.

[0014] 3. When reducing the temperature of the compressed air, the present invention preferentially reduces the temperature of the air at the top. When the pressure at the top decreases, the air discharged from the pressure relief valve will be reduced, which can increase the resource utilization rate. After the air pressure at the top decreases, the air at the bottom will fill upward, thereby reducing the air pressure at the bottom. Subsequently, the air pressure at the bottom is further reduced through the second heat exchange plate, thus preventing the compressed air pressure at the bottom of the storage tank from being too high and preventing explosion caused by excessive pressure.

[0015] 4. The present invention guides the air through the guide plate, which can make the air flow more smoothly, thereby making the air pressure more balanced; when heat exchange is carried out on the second heat exchange plate, heat conduction can be carried out through the guide plate, and the heat exchange area can be made larger, thereby further increasing the heat exchange efficiency and reducing the demand for compressed air; since the surface of the guide plate is rough, the air will rub against the guide plate when passing through, and the air temperature will rise after rubbing. At this time, the air pressure of the compressed air can be increased, thereby reducing the amount of air compressed by the air compressor. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the overall installation state of the present invention; Figure 2 Schematic diagram of the overall structure of the present invention; Figure 3 Schematic diagram of the overall disassembled structure of the present invention; Figure 4 Internal cross-sectional view of the whole of the present invention; Figure 5 For the present invention Figure 4 Partial enlarged view of part A in the present invention; Figure 6 Schematic diagram of the structure at the heat conduction unit of the present invention (excluding the second heat exchange plate); Figure 7 Explosion diagram of the kinetic energy recovery unit of the present invention; Figure 8 Schematic diagram of the installation process of the present invention.

[0018] In the drawings, the list of components represented by each reference numeral is as follows: In the figure: 1, storage tank; 11, sandwich plate; 12, top cover; 13, pressure relief valve; 14, pressure gauge; 15, inlet gas pipe; 16, outlet gas pipe; 2, heat conduction unit; 21, heat exchanger; 211, heat exchange port; 212, cold exchange port; 213, cold liquid pipe; 22, heat conduction ring; 221, heat conduction pipe; 23, first heat exchange plate; 24, second heat exchange plate; 25, guide plate; 26, convex block; 3, kinetic energy recovery unit; 31, bracket; 32, impeller; 33, permanent magnet; 34, coil holder; 35, copper coil; 4, air compressor. Specific embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to Figures 1-8As shown in the figure, the present invention is a compressed air energy storage system located in a shaft, including a storage tank 1 and an air compressor 4. The storage tank 1 is buried in a deep well. The bottom of the circumferential surface of the storage tank 1 is fixedly connected with an air outlet pipe 16, and the top of the storage tank 1 is fixedly connected with a top cover 12. The middle of the top cover 12 is fixedly connected with a pressure relief valve 13, the top of the top cover 12 is fixedly connected with a pressure gauge 14, and the top of the top cover 12 is fixedly connected with an air inlet pipe 15. One end of the air inlet pipe 15 away from the top cover 12 is fixedly connected with the air compressor 4. The air compressor 4 is placed on the ground and is electrically connected to the electricity storage box. The top of the top cover 12 is fixedly connected with a heat conduction unit 2, and the bottom of the top cover 12 where the air inlet pipe 15 is located is fixedly connected with a kinetic energy recovery unit 3.

[0021] In this embodiment, considering that the prior art usually stores energy in a salt cavern for energy storage, but in some areas, there may be no underground salt cavern or it is not convenient to mine. At this time, it is necessary to dig a deep well on the ground and store compressed air. Considering that when the air compressor 4 compresses air, it will increase the air pressure in the storage tank 1 and generate a pressure heat effect. When the air pressure increases, the temperature will also rise. At this time, the temperature and air pressure of the compressed air are interrelated. The prior art usually uses the heat generated by the pressure heat effect, but it will also cause the air pressure of the compressed air to drop. When the air pressure of the compressed air decreases, it will also cause the thrust to decrease during subsequent power generation, resulting in the inability to push the steam turbine, thus reducing both the power generation amount and the power generation efficiency. During the low electricity consumption period, since the electricity consumption is relatively low, the excess electricity can be stored in the electricity storage box. When the electricity storage box is full, the remaining electricity will be supplied to the air compressor 4. After the air compressor 4 is powered, it will compress the air and transport it to the storage tank 1 through the air inlet pipe 15 for storage. Thus, electrical energy can be stored, and after the electrical energy storage is completed, compressed air can be used for energy storage and subsequent power generation through compressed air, thereby increasing the energy utilization rate. When the compressed air enters the storage tank 1, through the setting of the heat conduction unit 2, the compressed air can be heated, so that the air pressure of the compressed air can be greater, the same volume of air can obtain a greater air pressure, the amount of compressed air required for the storage tank 1 can be reduced, and the energy required for storing compressed air can be reduced. When the air pressure of the compressed air is too high, the heat conduction unit 2 can be used to cool the compressed air, thereby reducing the air pressure of the compressed air, reducing the air discharged from the pressure relief valve 13, and making other uses of the temperature of the compressed air, thereby increasing the energy utilization rate. During peak power consumption, due to high power consumption, only traditional power generation methods will consume a large amount of fuel resources. At this time, the power in the electricity storage box is first used for supplementary power supply. When the power in the electricity storage box is exhausted, the compressed air in the storage tank 1 is guided to the power generation equipment through the air outlet pipe 16, and the steam turbine is driven to rotate by the compressed air, thereby reducing the use of fuel.

[0022] Specifically, the heat conduction unit 2 includes a heat exchanger 21 and a heat conduction ring 22. 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. A heat conduction block is fixedly connected to the bottom of the heat exchanger 21, and a first heat exchange plate 23 is fixedly connected to the bottom of the heat conduction block; a plurality of heat exchange ports 211 are opened on one side of the heat exchanger 21 close to the air compressor 4, and a heat conduction pipe 221 is fixedly connected in the heat exchange port 211. The heat conduction pipe 221 is fixedly connected to the heat conduction ring 22; a cold exchange port 212 is opened on one side of the heat exchanger 21, and a cold liquid pipe 213 is fixedly connected in the cold exchange port 212.

[0023] In this embodiment, considering that when the air compressor 4 compresses air, it will cause a heat pressure effect on the air and conduct the heat of the compressed air to the air compressor 4. At the same time, the air compressor 4 will also generate heat during use; When compressing air, through the setting of the heat conduction ring 22, the temperature of the air compressor 4 can be conducted through the heat conduction pipe 221 and the heat can be conducted to the heat exchanger 21. At this time, heat exchange is carried out between the heat exchanger 21 and the heat conduction 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 at this time 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, and the excess energy can be provided for other equipment to use, or more storage tanks 1 can be filled to maximize resource utilization; 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 carried out with the high-temperature liquid in the heat exchanger 21, thereby reducing the temperature of the compressed air. Since the activity range of molecules is reduced, the air pressure of the compressed air can be reduced; reducing the air pressure by means of temperature conduction can reuse the excess temperature, thereby reducing the air discharged from the pressure relief valve 13 and increasing the energy utilization rate.

[0024] Specifically, a second heat exchange plate 24 is fixedly connected to the bottom of the first heat exchange plate 23.

[0025] In this embodiment, considering that the pressure of the deeper storage tank 1 will generate a pressure difference. For example, for a storage tank 1 more than 100 meters deep, at this time, a pressure difference will be generated between the top and the bottom of the storage tank 1. The higher the height of the storage tank 1, the greater the pressure difference will be. At this time, the pressure at the bottom of the storage tank 1 will be relatively large, which will also lead to the inability to accurately judge the air pressure at the bottom of the storage tank 1. When only judging through the pressure gauge 14, it may lead to an excessive pressure at the bottom of the storage tank 1, and it may cause the situation that the tank body cannot withstand the pressure and explodes; Through the setting of the second heat exchange plate 24, heat exchange can be carried out with the first heat exchange plate 23 when the pressure in the storage tank 1 is relatively large, so as to make the air pressure between the top and the bottom in the storage tank 1 more balanced. And because the first heat exchange plate 23 is above, when reducing the temperature of the compressed air, the temperature of the air at the top will be preferentially reduced. After 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. And 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 then, the air pressure at the bottom will be further reduced through the second heat exchange plate 24, thus avoiding an excessive pressure of the compressed air at the bottom of the storage tank 1 and preventing an explosion caused by excessive pressure.

[0026] Specifically, a plurality of bumps 26 are fixedly connected to the surface of the first heat exchange plate 23, and a plurality of bumps 26 are fixedly connected to the surface of the second heat exchange plate 24 near the bottom.

[0027] In this embodiment, considering that the air compression efficiency of the air compressor 4 is relatively high, through the heat conduction unit 2, it may be due to insufficient heat exchange efficiency that the air pressure will only increase significantly after the compressed air enters. At this time, after the air compressor 4 stops, the air pressure of the compressed air in the storage tank 1 will continue to rise, and the compressed air in the storage tank 1 will not decrease significantly, resulting in a low resource utilization rate; Through the setting of the bumps 26, the heat exchange area can be increased when the first heat exchange plate 23 and the second heat exchange plate 24 exchange heat, thereby increasing the heat exchange efficiency. And because the second heat exchange plate 24 is only provided with bumps 26 on the surface near the bottom, the heat exchange efficiency in the middle of the storage tank 1 will be reduced during heat exchange, and the heat exchange efficiency at the bottom of the storage tank 1 will be increased; since a plurality of bumps 26 are provided at both the top and the bottom of the storage tank 1, the air pressure in the middle of the storage tank 1 will be relatively high when reducing the air pressure. At this time, the compressed air in the middle of the storage tank 1 will flow to the top and the bottom, and the air pressure will tend to be stable. The internal air pressure can be made more balanced through the flow of the compressed air.

[0028] Specifically, a plurality of flow guide plates 25 are alternately fixedly connected to the surface of the second heat exchange plate 24, and the surface of the flow guide plate 25 is rough.

[0029] In this embodiment, through the arrangement of the flow guide plate 25, compressed air can flow between the flow guide plates 25 after entering, and different pressures can be distinguished through the flow guide plate 25. The air can be guided by the flow guide plate 25, making the air flow more smoothly, thus making the air pressure more balanced. Since the flow guide plate 25 is fixed to the second heat exchange plate 24, heat conduction can be carried out through the flow guide plate 25 during the heat exchange of the second heat exchange plate 24, and the heat exchange area can be made larger, thereby further increasing the heat exchange efficiency and reducing the demand for compressed air. Since the surface of the flow guide plate 25 is rough, friction will occur between the air and the flow guide plate 25 when the air passes through, and the air temperature will rise after the friction. At this time, the air pressure of the compressed air can rise, so the amount of air compressed by the air compressor 4 can be reduced.

[0030] Specifically, the kinetic energy recovery unit 3 includes a bracket 31. The bracket 31 is fixedly connected to the top cover 12. A cavity is formed in the middle of the bracket 31. An impeller 32 is rotatably connected to the bottom of the cavity. A permanent magnet 33 is fixedly connected to the inner wall of the cavity. A plurality of coil holders 34 are fixedly connected to the outer wall of the impeller 32 located in the cavity. Copper coils 35 are fixedly connected to the surfaces of the coil holders 34. The coil holders 34 are slidably connected to the permanent magnet 33.

[0031] In this embodiment, considering that when the air compressor 4 compresses air, the compressed air will have a large kinetic energy when entering the storage tank 1; Through the arrangement of the bracket 31 and the impeller 32, when the compressed air enters, it can contact the impeller 32 and cause the impeller 32 to rotate. At this time, the impeller 32 will drive the coil holders 34 and the copper coils 35 to rotate, and thus generate electricity. Since the power generation is of low power, the generated electricity can be applied to the equipment in the system for supplementary power supply. Therefore, the kinetic energy when the compressed air enters the storage tank 1 can be converted into electrical energy, increasing the utilization rate of resources. And when the compressed air enters, it can be decelerated by the impeller 32 to prevent the compressed air from continuously impacting the storage tank 1, resulting in friction or corrosion.

[0032] 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.

[0033] In this embodiment, considering that the storage tank 1 will be in direct contact with concrete, etc. in the deep well, at this time, the high-temperature compressed air may conduct heat from the storage tank 1 to the outside, which may cause heat loss and waste; By providing the sandwich panel 11, heat-insulating material can be filled between the storage tank 1 and the sandwich panel 11, thereby preventing the loss of internal high temperature to the outside. Since compressed air is stored inside the storage tank 1, a vacuum insulation method cannot be used between the sandwich panel 11 and the storage tank 1, and multiple reinforcing ribs need to be provided for support to prevent the sandwich panel 11 from deforming due to the high-pressure compressed air. At the same time, since the sandwich panel 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, and prevent the storage tank 1 from deforming or bursting due to excessive air pressure.

[0034] A compressed air energy storage system located in a shaft is provided, and an installation method of the system is proposed. The installation method is as follows: S1. During installation, first install the outlet pipe 16 at the bottom of the storage tank 1, then place the storage tank 1 in the deep well, cover it with the top cover 12 for fixation, then place the air compressor 4 on the ground, connect the air compressor 4 and the storage tank 1 through the inlet pipe 15, and finally check the tightness of the storage tank 1. After completion, it can be put into use; S2. During the low electricity consumption period, since the electricity consumption is relatively low, the excess electricity can be supplied to the air compressor 4. When the air compressor 4 will transport the compressed air into the storage tank 1 through the inlet pipe 15 for storage; S3. When the compressed air enters the storage tank 1, through the provision of the heat conduction unit 2, the compressed air can be heated, thereby making the air pressure of the compressed air greater and reducing the amount of compressed air required for the storage tank 1; when the air pressure of the compressed air is too high, the heat conduction unit 2 can be used to cool the compressed air, thereby reducing the air pressure of the compressed air; S3. During the high electricity consumption period, since the electricity consumption is relatively high, only through the traditional power generation method will cause 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 steam turbine is rotated by the compressed air, thereby reducing the use of fuel.

[0035] During use, First, during the low electricity consumption period, since the electricity consumption is relatively low, the excess electricity can be used to store electricity in the electricity storage box. When the electricity storage box is full, the remaining electricity will be supplied to the air compressor 4. After supplying power to the air compressor 4, the air compressor 4 will compress the air and transport it into the storage tank 1 through the inlet pipe 15 for storage; thereby, electrical energy can be stored, and after the electrical energy storage is completed, compressed air can be used for energy storage, and subsequent power generation can be carried out through compressed air, thereby increasing the energy utilization rate; Through the settings of the bracket 31 and the impeller 32, when compressed air enters, it can contact the impeller 32 and cause the impeller 32 to rotate. At this time, the impeller 32 will drive the coil holder 34 and the copper coil 35 to rotate, and thus generate electricity. Since the power generation is relatively low, the generated electricity can be applied to the equipment within the system for supplementary power supply. Thus, the kinetic energy when the compressed air enters the storage tank 1 can be converted into electrical energy, which can increase the utilization rate of resources. And when the compressed air enters, it can be decelerated by the impeller 32 to prevent the compressed air from continuously impacting the storage tank 1, resulting in friction or corrosion.

[0036] Secondly, when compressing air, through the setting of the heat conduction ring 22, the temperature of the air compressor 4 can be transferred through the heat conduction pipe 221 and the heat can be conducted to the heat exchanger 21. At this time, heat exchange is carried out between the heat exchanger 21, the heat conduction block and the first heat exchange plate 23. When the heat is transferred to the inside of the storage tank 1 through the heat exchange plate, the temperature of the compressed air inside the storage tank 1 will rise. When the temperature of the compressed air rises, the movement of molecules will speed up, and at this time, 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, and the excess energy can be provided for other equipment to use, or more storage tanks 1 can be filled to maximize the utilization of resources. When the air pressure inside the storage tank 1 is too high, the excess temperature is conducted to the inside of 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 perform heat exchange with the high-temperature liquid inside the heat exchanger 21, thereby reducing the temperature of the compressed air. Since the amplitude of molecular activity is reduced, the air pressure of the compressed air can be reduced; reducing the air pressure by means of temperature conduction can reuse the excess temperature, thereby reducing the air discharged from the pressure relief valve 13 and increasing the utilization rate of energy. Through the setting of the second heat exchange plate 24, when the pressure inside the storage tank 1 is relatively high, heat exchange can be carried out with the first heat exchange plate 23, so that the air pressure at the top and bottom inside the storage tank 1 is more balanced. And since the first heat exchange plate 23 is above, when reducing the temperature of the compressed air, the temperature of the air at the top will be preferentially reduced. When the pressure at the top is reduced, the air discharged from the pressure relief valve 13 can be reduced, which can increase the utilization rate of resources. And 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 is further reduced through the second heat exchange plate 24, thus preventing the pressure of the compressed air at the bottom of the storage tank 1 from being too high and preventing an explosion caused by excessive pressure.

[0037] Meanwhile, through the setting of the bumps 26, the heat exchange area can be increased when the first heat exchange plate 23 and the second heat exchange plate 24 conduct heat exchange, thereby increasing the heat exchange efficiency. And since the second heat exchange plate 24 is provided with bumps 26 only on the surface near the bottom, the heat exchange efficiency in the middle of the storage tank 1 will be reduced during heat exchange, and the heat exchange efficiency at the bottom of the storage tank 1 will be increased; since a plurality of bumps 26 are provided at both the top and the bottom of the storage tank 1, when the air pressure is reduced, the air pressure in the middle of the storage tank 1 will be relatively high. At this time, the compressed air in the middle of the storage tank 1 will flow to the top and the bottom, and the air pressure will tend to be stable. The internal air pressure can be made more balanced through the flow of the compressed air; Through the setting of the flow guide plate 25, the compressed air can flow between the flow guide plates 25 after entering, and different pressures can be distinguished through the flow guide plate 25. And through the flow guide plate 25, the air can be guided for the air, which can make the air flow more smoothly, thereby making the air pressure more balanced; since the flow guide plate 25 is fixed to the second heat exchange plate 24, heat can be conducted through the flow guide plate 25 during the heat exchange of the second heat exchange plate 24, and the heat exchange area can be made larger, so that the heat exchange efficiency can be further increased, and the demand for compressed air can be reduced; since the surface of the flow guide plate 25 is rough, the air will rub against the flow guide plate 25 when passing through, and the temperature of the air will rise after the friction. At this time, the air pressure of the compressed air can be increased, and thus the amount of air compressed by the air compressor 4 can be reduced.

[0038] Finally, during the peak electricity consumption period, due to the high power consumption, only through the traditional power generation method will the fuel resources be consumed greatly. At this time, the power in the electricity storage box is first used for supplementary power supply. When the power in the electricity storage box is exhausted, the compressed air in the storage tank 1 is then guided to the power generation equipment through the air outlet pipe 16, and the steam turbine is driven to rotate by the compressed air, thereby reducing the use of fuel.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited 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).

2. A compressed air energy storage system in a shaft according to claim 1, characterized in that: 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), a heat conduction block is fixedly connected to the bottom of the heat exchanger (21), and a first heat exchange plate (23) is fixedly connected to the bottom of the heat conduction block; 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).

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

4. A compressed air energy storage system in a shaft according to claim 3, 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.

5. A compressed air energy storage system in a shaft according to claim 4, 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.

6. A compressed air energy storage system in a shaft according to claim 5, characterized in that: The kinetic energy recovery unit (3) comprises 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), an impeller (32) is rotatably connected to the bottom of the cavity, and a permanent magnet (33) is fixedly connected to the inner wall of the cavity; a plurality of coil frames (34) are fixedly connected to the outer wall of the impeller (32) located in the cavity, a copper coil (35) is fixedly connected to the surface of the coil frame (34), and the coil frame (34) is slidably connected to the permanent magnet (33).

7. A compressed air energy storage system in a shaft according to claim 6, 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).

8. According to the compressed air energy storage system in a shaft as claimed in claim 7, a method for installing the system is proposed, 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 fix 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), and finally check the sealing of the storage tank (1). After completion, it can be put into use; S2. When electricity consumption is low, the excess electricity can be used to supply power to the air compressor (4), and the air compressor (4) will transport 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 can be heated by the heat transfer unit (2), thereby increasing the air 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 can be cooled by the heat transfer unit (2), thereby reducing the air pressure of the compressed air; S3. 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 drives the turbine to rotate, thereby reducing the use of fuel.

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