CN108571415B - A high-pressure adiabatic gas storage pumped compressed air energy storage system - Google Patents

Abstract

The invention discloses a high-pressure adiabatic gas storage and pumping compressed air energy storage system. The air in the water-gas co-containment cabin directly enters the gas storage shaft after passing through a supercharger, so that the gas pressure in the water-gas co-containment cabin is kept stable. Due to the heat storage function of the gas storage shaft, the potential energy and thermal energy of the compressed air are stored at the same time. In the stage of energy release, the output electric energy of the system includes two parts: one part, the high-pressure air with a certain temperature in the shaft enters the turbine to expand to do work; the other part is the water in the water-gas co-containment chamber to push the water turbine to generate electric energy, which improves the energy storage of the system density and operating efficiency. Because there is an insulation layer outside the gas storage shaft, the temperature of the air in it is relatively high, and the temperature decreases after flowing through the turbine and expanding, which ensures that the temperature in the water-gas co-combination chamber is low, and avoids damage to the water turbine caused by the increase in water temperature. The invention uses the gas storage shaft to store the high-pressure air, which greatly reduces the investment cost of the high-pressure container, shortens the recovery period of the energy storage system, and improves the operating economy of the system.

Description

A high-pressure adiabatic gas storage pumped compressed air energy storage system

technical field

The invention relates to the field of electric energy physical storage, in particular to a high-pressure adiabatic gas storage pumped compressed air energy storage system.

Background technique

With the increasingly prominent energy and environmental problems, renewable energy such as wind energy and solar energy has received more and more attention. development poses enormous challenges. As a transitional system between the power plant and the grid, the energy storage system can effectively solve the grid connection problem of renewable energy. In addition, the energy storage system can also smooth the load fluctuation of the power grid and improve the security and controllability of the power grid. Among the existing energy storage methods, due to the limitation of energy storage scale, discharge time, technology maturity and other factors, only compressed air energy storage and pumped hydro storage can be applied on a large scale.

However, compressed air energy storage and pumped storage systems also have certain disadvantages. Compressed air energy storage systems have many internal heat transfer links and large irreversible losses. In addition, in order to ensure high output power and efficiency, a large amount of fuel needs to be consumed in the power generation stage; pumped storage systems have high requirements for terrain and water sources.

In response to these problems, Wang Huanran and others from Xi'an Jiaotong University first proposed a water-gas co-containment cabin electric energy storage system, and in view of the changing working conditions of the system in the process of power generation and energy storage, a constant-pressure water-gas co-containment cabin power storage system was proposed. Compartment electric energy storage system (CN201210099690.1). The constant-pressure water-gas co-containment cabin power energy storage system uses a steam boiler to replenish water vapor into the water-gas co-containment cabin to ensure a constant pressure in the water-gas co-containment cabin, thereby ensuring that the hydro turbine generator set operates under stable conditions to generate electricity . However, the higher temperature of water vapor will reduce the safety of the compatible container to a certain extent, and will accelerate the corrosion of the water-gas compatible container. Therefore, the research team proposed a water-gas co-containment cabin electric energy storage system (CN201410312066.4) using a high-pressure gas tank to maintain constant pressure. In the process of energy storage, the system transmits the air from the water-air coexistence chamber to the high-pressure air storage tank through the supercharger. The air-combined containment chamber achieves the purpose of maintaining a constant pressure in the water-air containment chamber during drainage. During the energy storage process of the water-gas co-containment cabin electric energy storage system using a high-pressure gas storage tank with constant pressure, the pressure in the high-pressure gas storage tank continues to rise, the back pressure of the supercharger increases, and its flow rate changes continuously causing water Pressure fluctuations in the air-contained cabin; under high pressure, the solubility of the gas in the cabin increases sharply in water, and these dissolved gases will cause serious cavitation of the turbine blades, causing major safety accidents; and in the process of power generation, The air in the high-pressure gas storage chamber passes through the pressure regulator valve and the pressure decreases, resulting in energy loss; in addition, the high-pressure gas storage tank has a huge investment cost, which reduces the operating economy.

Contents of the invention

The object of the present invention is to provide a high-pressure adiabatic gas storage pumping compressed air energy storage system to overcome the deficiencies of the prior art. The system has high energy storage density and operating efficiency and low investment cost.

To achieve the above object, the present invention adopts the following technical solutions:

A high-pressure adiabatic gas storage and pumping compressed air energy storage system, including a water storage tank, a water-gas co-containment cabin, and a gas storage shaft. The water outlet of the holding chamber is connected with the reservoir through the valve and the turbine unit; the turbine unit is connected to the generator;

A hollow steel plate capable of floating with the liquid level in the water-air coexistence chamber is provided in the water-air coexistence chamber;

The gas outlet at the upper end of the water-gas compatibility chamber is respectively connected to the turbine and the supercharger through valves, and the turbine and supercharger are respectively connected to the gas storage shaft through valves;

The booster is connected to the electric motor and compressor unit, and the turbine is connected to the generator.

Further, there is a spiral guide rail inside the wall of the water-air coexistence bulkhead, and the hollow steel plate slides in the spiral guide rail along with the liquid surface.

Further, the lower surface of the circular hollow steel plate is an inclined surface, and the cross-section of the volume symmetry plane of the hollow steel plate is a right triangle, and its larger acute angle is the same as the helix angle of the helical guide rail.

Further, the inclined surface below the circular hollow steel plate is provided with a vertically placed steel plate, and the lower surface of the steel plate is parallel to the upper surface of the circular hollow steel plate.

Further, there is a ferrule around the upper water level inside the water-air coexistence chamber, and the ferrule can match the hollow steel plate.

Further, the supercharger adopts a volumetric piston compressor or a screw compressor, and the supercharger adopts a parallel working mode of multiple units; the turbine is equipped with a moving and stationary vane adjusting device, and adopts a sliding pressure operation mode.

Further, the gas storage shaft is used to store high-pressure air. The gas storage shaft includes an upper section of industrial pipeline and a lower section of industrial pipeline, and the upper section of industrial pipeline and the lower section of industrial pipeline are connected by flanges; the thickness of the pipe wall of the upper section of industrial pipeline is greater than that of the bottom section of industrial pipeline , the inner diameter of the industrial pipeline in the upper section is smaller than the inner diameter of the industrial pipeline in the lower section.

Further, the outer side of the gas storage shaft is provided with thermal insulation paint, thermal insulation shell and waterproof material in sequence.

Further, the water turbine unit, water pump unit, turbine, supercharger, compressor unit and all valves are connected to the controller.

Further, a liquid level sensor and a pressure sensor are installed on the top of the water-air compatibility chamber, and both the liquid level sensor and the pressure sensor are connected to the controller.

Compared with the prior art, the present invention has the following beneficial technical effects:

In the high-pressure adiabatic gas storage pumping compressed air energy storage system of the present invention, in the energy storage stage, the air in the water-gas co-containment cabin directly enters the gas storage shaft after passing through the supercharger, and simultaneously stores the compressed air due to the heat storage effect of the gas storage shaft. The potential energy and thermal energy of the air, in the stage of energy release, the output power of the system includes two parts: one part, the high-pressure air with a certain temperature in the shaft enters the turbine to expand to do work; The energy storage density and operating efficiency of the system are improved. Since there is an insulating layer outside the gas storage shaft, the temperature of the air in it is relatively high, and the temperature decreases after flowing through the turbine expansion, which ensures that the temperature in the water-gas co-containment cabin is low and avoids water The temperature rise will cause damage to the turbine. The invention uses the gas storage shaft to store the high-pressure air, which greatly reduces the investment cost of the high-pressure container, shortens the recovery period of the energy storage system, and improves the operating economy of the system. The invention adopts a volumetric supercharger to ensure that the flow of air flowing out of the water-gas co-containment cabin is constant during the energy storage stage, and the pressure in the water-gas co-containment cabin is kept constant by matching the flow rate of the water pump; the volumetric supercharger The ability to change working conditions is strong, and when the pressure in the gas storage shaft gradually increases, it can maintain a high operating efficiency; the turbine adopts the sliding pressure operation mode, which avoids the energy of the throttling and stabilizing valve part during the energy release stage losses, improving system efficiency.

Further, the present invention reduces the contact area between the water surface and the gas in the water-air coexistence cabin by setting the hollow steel plate, so that the amount of dissolved air in the water is greatly reduced, ensuring the safe and efficient operation of the water turbine, and effectively controlling the cavitation phenomenon .

Further, at the end of the energy storage stage of the present invention, the ferrule in the water-air co-containment cabin cooperates with the hollow steel plate to separate the air from the water. The pressure of the water is slightly greater than the pressure of the air to ensure that the air will not dissolve in the water during the interval between energy storage and energy release.

Further, the spiral guide rail in the water-air coexisting cabin and the steel plate placed vertically at the lower part of the hollow steel plate in the present invention reduce the possibility of vortex generation in the water-gas sharing cabin.

Further, in the present invention, when the air flow rate is large in the energy storage stage, multiple superchargers are connected in parallel to improve the shortcoming of the volumetric supercharger with a small flow rate.

Furthermore, the upper pipe of the gas storage shaft of the present invention has a smaller diameter and a thicker pipe wall to increase its pressure bearing capacity; the lower pipe has a larger diameter and thinner pipe wall to reduce costs.

Description of drawings

Fig. 1 is a schematic structural diagram of a high-pressure adiabatic gas storage pumped water compressed air energy storage system of the present invention.

Figure 2 is a top view of the hollow steel plate.

Figure 3 is a side view of the hollow steel plate.

Figure 4. Schematic diagram of the internal structure of the water-air compatibility chamber.

Figure 5 Schematic diagram of the cross-section of the spiral guide rail.

Fig. 6 is a schematic diagram of the industrial pipeline connection of the gas storage shaft.

Figure 7 is a schematic diagram of parallel operation of three superchargers.

Figure 8 is a schematic diagram of the assembly of the hollow steel plate.

Fig. 9 is a schematic diagram of the axial side of the hollow steel plate.

Among them, 1. Reservoir; 2. Water-gas co-containment cabin; 3. Gas storage shaft; 4. Turbine; 5. Supercharger; 6. Compressor unit; 7. Water-gas separator; 8. Controller; 9. Water pump unit; 10. Water turbine unit; 11. Motor; 12. Motor; 13. Generator; 14. The first three-way valve; 15. The second three-way valve; 16. The fourth three-way valve; 17. The first Three-way valve; 18. First four-way valve; 19. Liquid level sensor; 20-21. Pressure sensor; 22. Ferrule; 23. Hollow steel plate; 24. Spiral guide rail; 25. Upper pulley; 26. Lower pulley ; 27, steel plate; 28, industrial pipeline; 29, thermal insulation coating; 30, thermal insulation shell; 31, waterproof material; 32 flange.

Detailed ways

The present invention is described in further detail below in conjunction with accompanying drawing:

As shown in Figures 1 to 7, a high-pressure adiabatic gas storage and pumping compressed air energy storage system of the present invention includes a water storage tank 1, a water pump unit 9, a water turbine unit 10, a water-gas co-containment cabin 2, a hollow steel plate 23, a storage tank Gas shaft 3, supercharger 5, turbine 4, water-gas separator 7;

The water inlet and the water outlet of the water-air co-containment cabin 2 are the same water inlet and outlet, and the reservoir 1 is connected to the water-gas co-containment cabin 2 bottom water inlet and outlet through the first three-way valve 14 and the water pump unit 9. At the same time, the water-gas co-containment cabin The water inlet and outlet at the bottom of the cabin 2 are connected to the reservoir 1 through the first three-way valve 14 and the water turbine unit 10; Three-way valve 17, supercharger 5, first four-way valve 18 are connected to gas storage shaft 3, and gas storage shaft 3 passes through first four-way valve 18, turbine 4, fourth three-way valve 16, second three-way valve 15 communicates with the top of the water-gas co-containment cabin 2; the supercharger 5 is connected to the motor 12, and the turbine 4 is connected to the generator 13; the supercharger adopts a volumetric type, so that the flow rate of the air in the energy storage stage is controlled to be constant; and the volume The supercharger has a strong ability to change working conditions, and can maintain high operating efficiency when the pressure in the gas storage shaft increases. The expander adopts the impeller type, and the angle of the inlet guide vane is adjusted in the energy release stage to make the turbine run smoothly.

During operation, the compressor unit 6 absorbs air from the outside, and is driven by the motor 11 to compress the air through the third three-way valve 17 connected in series with the supercharger 5, and through the first four-way valve 18, the fourth three-way valve 16, the second three-way The through valve 15 is stored in the water-gas co-containment cabin and the gas storage shaft. The compressor unit 6 can be determined according to the required pressure ratio. Generally, 2 to 3 stages of compressors are connected in series, and inter-stage cooling is used to reduce the high pressure at the outlet of the compressor. the temperature of the air and reduce the power consumption of the compressor unit; after the air in the water-air co-accommodating cabin 2 reaches a predetermined pressure, the compressor unit 6 stops working; The device 7 and the third three-way valve 17 directly enter the gas storage shaft 3 after being compressed by the supercharger 5, and the gas storage shaft 3 can be one or a parallel connection of multiple gas storage shafts; at the same time, the water pump 9 starts work, pump the water in the reservoir 1 into the water-air compatible cabin 2, when the water in the water-air compatible cabin 2 reaches the lower limit of the water level, the water pump 9 and the supercharger 5 stop working, and in the process, the water pump 9. The volume flow rate of the water in the supercharger 5 is equal to that of the air in the supercharger 5, so as to ensure that the pressure in the water-gas co-accommodating cabin 2 is constant. So far, the preparation work of the system is completed. work again. Turbine 4 is equipped with a moving and stationary blade adjustment device, and adopts a sliding pressure operation mode.

In the energy storage stage, the water pump 9 is driven by renewable energy or the surplus electric energy of the power grid, and sends the water from the reservoir 1 to the water-air co-containment cabin 2 through the first three-way valve 14, and at the same time, the air in the water-gas co-containment cabin 2 Enter the inlet of the supercharger 5 through the first three-way valve 15, the water-gas separator 7 and the third three-way valve 17. After being compressed by the supercharger 5, it flows through the first four-way valve 18 and directly stores it in the gas storage shaft 3. In order to keep the pressure in the water-air co-containment cabin 2 constant, the volume flow rate of the water in the water pump 9 and the air in the supercharger 5 are kept equal during this process. can end the process.

In the energy release stage, the high-pressure air with a certain temperature in the gas storage shaft 3 enters the inlet of the turbine 4 through the first four-way valve 18 to push the turbine 4 to do work and drives the generator 13 to generate electric energy, and the air expanded to a fixed pressure passes through the fourth The three-way valve 16 and the second three-way valve 15 enter the water-gas co-containment cabin, and at the same time, the water in the water-gas co-containment cabin 2 enters the water turbine 10 through the first three-way valve 14 to push the water turbine to generate power. In the process, Keep the volume flow rate of the air in the turbine 4 equal to that of the water turbine 10 to achieve the purpose of keeping the pressure in the water-gas sharing chamber 2 constant. When the water level in the water-gas sharing chamber 2 reaches the predetermined lower limit, the energy release process ends.

Referring to Fig. 2 and Fig. 3, a circular hollow steel plate 23 is placed in the water-air co-containment cabin 2, and the hollow steel plate 23 can float on the water surface of the water-gas co-containment cabin 2, and the water surface is just parallel to the upper surface of the hollow steel plate 23, The water surface of the water-air co-containment cabin 2 is covered by hollow steel plates 23, so as to reduce the contact area between water and air, and reduce the amount of dissolved air in water; pressure bearing capacity; the diameter of the hollow steel plate 23 is provided with an upper pulley 25 and a lower pulley 26, and the upper pulley 25 is located on the upper side of the hollow steel plate 23 and lower than the upper surface of the hollow steel plate 23, so that the pulley 25 is isolated from the air , to prevent corrosion, the lower pulley 26 is located at the lower side of the hollow steel plate 23 peripheral sides.

Referring to Fig. 4 and Fig. 5, there is a spiral guide rail 24 inside the wall of the water-air coexistence cabin 2 to guide the movement of the hollow steel plate 23 in the process of energy storage and energy release, and the hollow steel plate 23 is in the water during the process of rising or falling of the water level. Under the joint action of buoyancy of buoyancy and guide rail 24, it spirals up or down, and it is opposite to the rotation direction of water, so as to avoid the formation of vortex; the upper water level of water-air co-accommodation cabin 2 is provided with ferrule 22, and ferrule 22 and hollow steel plate 23 It can match, see Fig. 8, when the gas storage process ends, the hollow steel plate 23 floats with the water surface to the upper water level and connects with the ferrule 22. At this time, the booster unit 5 continues to work for a short period of time, and a part of the air is transferred from the water-air compatibility chamber. 2 enters the supercharger 5 through the three-way valve 15, the water-gas separator 7, and the three-way valve 17. After being compressed, it is sent to the gas storage shaft 3 through the four-way valve 18, so that the pressure of the upper air in the water-gas co-containment cabin 2 is slightly lower. Lower than the pressure of the lower water, to ensure that the air is isolated from the water during the interval between the energy storage stage and the energy release stage, and reduce the amount of dissolved air in water. Through the use of three-way and four-way valves, the air inlet and outlet and water inlet and outlet of the water-gas coexistence cabin and the gas storage shaft are reduced, the difficulty of equipment processing is reduced, and the reliability is increased.

As shown in Figure 9, the lower surface of the circular hollow steel plate 23 is an inclined surface, and the cross section of the volume symmetry plane of the hollow steel plate 23 is a right triangle, and its larger acute angle is the same as the helix angle of the helical guide rail 24; the circular hollow steel plate The inclined surface below 23 is provided with a vertically placed steel plate 27, and the lower surface of the steel plate 27 is parallel to the upper surface of the circular hollow steel plate 23, so as to increase the influence ability of the hollow steel plate 23 on water and reduce vortex formation; the upper pulley 25 and the lower pulley 26 is located on the horizontal extension line of the end point of the hypotenuse of the right triangle, to ensure that the hollow steel plate 23 can move along the spiral guide rail 24, and the upper surface remains horizontal during the movement; the spiral guide rail 24 adopts the arc spraying zinc process to prevent the corrosion of the guide rail; The spiral guide rail 24 is connected with the water-air compatibility cabin 2 with a polyurethane adhesive.

Referring to Fig. 6, the gas storage shaft 3 is used to store high-pressure air. The gas storage shaft 3 includes an upper section of industrial pipeline and a lower section of industrial pipeline, and the upper section of industrial pipeline and the lower section of industrial pipeline are connected by a flange 32; Pipe wall thickness, the inner diameter of the industrial pipeline in the upper section is smaller than the inner diameter of the industrial pipeline in the lower section, and the outer side of the gas storage shaft 3 is provided with thermal insulation coating 29, thermal insulation shell 30 and waterproof material in sequence, the thermal insulation coating 29 is made of composite silicate, and the thermal insulation shell 30 is made of Cotton; the outermost layer of the insulation section is covered by a waterproof material to ensure the thermal insulation effect of the thermal insulation coating 29 and the thermal insulation shell 30, and the waterproof material 31 adopts polyethylene.

Referring to Fig. 7, when the air flow rate from the water-gas co-containment chamber 2 into the supercharger 5 in the energy storage stage is relatively large, the parallel operation mode of multiple superchargers is adopted, and each supercharger is driven by an electric motor and the inlet is uniformly connected. A valve is set, and then the pressurized air is delivered to the gas storage shaft 3 through the first four-way valve 18 through the same pipeline, so as to ensure that the pressure in the water-gas co-accommodation cabin 2 is constant.

A liquid level sensor 19 and a pressure sensor 20 are installed on the top of the water-air compatible cabin 2, the liquid level sensor 19 adopts a photoelectric liquid level sensor, the pressure sensor 20 adopts a piezoresistive pressure sensor, and the top of the water-air compatible cabin 2 has a hole. Used to pass signal lines. The pressure in the water-air coexistence cabin 2 is constant, and the pressure in the reservoir 1 is ambient pressure.

The water pump unit 9, the water turbine unit 10, the generator 13, the motors 11-12, the three-way valves 14-17, and the four-way valve 18 are all connected to the controller 8, and the controller 8 is based on the signals measured by the liquid level sensor 20 and the pressure sensor 21 Control the start and stop of the water pump unit 9, the water turbine unit 10, the generator 13, the motor 11-12, and the on-off and opening of the three-way valve and the four-way valve 14-18.

Concrete working process and principle of the present invention:

(1) In the pre-compression stage, the controller 8 adjusts the third three-way valve to connect the compressor unit 6 with the supercharger 5, the first four-way valve 18 connects the supercharger 5 to the gas storage shaft 3, and the second three-way valve 15. The fourth three-way valve 16 and the first four-way valve 18 connect the gas storage shaft 3 with the water-gas co-containment cabin 2, then the compressor unit 6 and the supercharger 5 start to work, and the air passes through the compressor unit 6, the second three The through valve 15, the fourth three-way valve 16, the third three-way valve 17, the supercharger 5, and the first four-way valve 18 enter the gas storage shaft 3 and the water-gas co-containment cabin 2, and wait until the water-gas co-containment cabin 2 After the internal pressure reaches a predetermined value, the compressor unit 6 stops working; the air in the water-air co-containment cabin 2 passes through the second three-way valve 15, the water-gas separator 7, and the third three-way valve 17 after being compressed by the supercharger 5 directly into the gas storage shaft 3, at the same time, the water pump 9 starts to work, and the water in the reservoir 1 is pumped into the water-air coexistence cabin 2, and when the water in the water-gas coexistence cabin 2 reaches the lower limit of the water level, the water pump 9 and booster 5 stop working, and in the process, the volumetric flow rate of water in the water pump 9 and air in the booster 5 is equal to ensure that the pressure in the water-gas co-accommodation cabin 2 is constant.

(2) In the energy storage stage, the first three-way valve 14 connects the water pump 9 with the water-gas co-containment cabin 2, the second three-way valve 15 connects the water-gas co-containment cabin 2 with the water-gas separator 7, and the third three-way The valve 17 connects the water-gas separator 7 with the air inlet of the supercharger 5, the first four-way valve 18 connects the air outlet of the supercharger 5 with the gas storage shaft 3, and the water pump 9 is powered by renewable energy or the surplus of the grid. Driven by electric energy, the water is sent from the reservoir 1 to the water-air coexisting cabin 2 through the first three-way valve 14, and the air in the water-air sharing cabin 2 passes through the second three-way valve 15, the water-gas separator 7 and the The third three-way valve 17 enters the inlet of the piston supercharger 5, and after being compressed, flows through the first four-way valve 18 and directly stores it in the gas storage shaft 3. Constant, the volume flow rate of water in the water pump 9 is the same as that of the air in the supercharger 5.

(3) In the energy release stage, the first four-way valve 18 connects the gas storage shaft 3 with the inlet of the turbine 4, and the second three-way valve 15 and the fourth three-way valve 16 connect the gas outlet of the turbine 4 with the water gas outlet. The first three-way valve 14 connects the water-gas co-accommodation cabin 2 with the water turbine 10, and the high-pressure air with a certain temperature in the gas storage shaft 3 enters the inlet of the turbine 4 through the first four-way valve 18 to push the turbine. Flat 4 does work to drive the generator 13 to send out electric energy, and the air expanded to a fixed pressure enters the water-gas co-containment cabin 2 through the second three-way valve 15 and the fourth three-way valve 16, and meanwhile, the water in the water-gas co-containment cabin 2 Enter the water turbine 10 through the first three-way valve 14, and push the water turbine to generate electricity and perform work. During this process, the volume flow rate of the air in the turbine 4 is equal to that of the water in the water turbine 10, so as to keep the pressure in the water-gas co-containment chamber 2 constant. the goal of.

The invention solves the problems of poor adaptability to terrain and water source, high investment cost, and low energy storage efficiency and density of the traditional pumped water storage system.

1. In the energy storage stage of the present invention, the air in the water-air co-containment cabin 2 is directly stored in the gas storage shaft after passing through the supercharger 5, that is, the pressure energy is stored and the compression heat energy is stored, the gas storage pressure is increased, and the gas storage pressure is greatly reduced. The investment cost of the high-pressure vessel is reduced, the payback period of the energy storage system is shortened, and the economy of the system operation is improved.

2. In the energy storage stage of the present invention, the supercharger 5 adopts a positive displacement piston compressor or a screw compressor to ensure that the flow rate of the air flowing out of the water-air co-accommodation cabin 2 is constant, and by matching the flow rate of the water in the water pump 9, the water flow rate is guaranteed to be constant. The pressure in the gas storage chamber 2 remains unchanged; as the pressure in the gas storage shaft 3 increases, the power consumption is reduced and the system efficiency is improved by changing the pressure ratio of the booster 5 .

3. In the energy release stage of the present invention, the high-pressure air with a certain temperature in the gas storage shaft 3 enters the turbine 4 and expands to do work, which reduces energy loss and improves system efficiency and energy storage density; as the pressure in the gas storage shaft 3 decreases , by changing the expansion ratio of the turbine 4 to keep the pressure of the outlet air constant, thereby ensuring that the pressure in the water-gas coexistence chamber 2 remains constant.

4. The present invention uses hollow steel plates 23 to reduce the contact area between water and air in the water-air co-containment cabin 2; by designing a spiral guide rail in the water-gas co-containment cabin 2, water ingress and drainage in the water-gas co-containment cabin 2 are avoided Vortex generation during the process; after the energy storage stage ends, the supercharger 4 continues to work for a period of time, so that the pressure of the water in the water-gas co-containment cabin 2 is slightly greater than the pressure of the air, ensuring that the air It will not dissolve in water, ensuring the safe and efficient operation of the water turbine.

5. The present invention adopts three-way and four-way valves, which reduces the gas inlet and outlet and water inlet and outlet of the water-air coexistence cabin and the gas storage shaft, reduces the difficulty of equipment processing, and increases reliability.

Claims (5)

1. A high-pressure adiabatic gas storage pumping compressed air energy storage system, characterized in that it comprises a water storage tank (1), a water-gas coexistence cabin (2) and a gas storage shaft (3), and the storage tank (1) passes through The valve and the water pump unit (9) are connected to the water inlet of the water-gas co-containment cabin (2), and the water outlet of the water-gas co-containment cabin (2) is connected to the reservoir (1) through the valve and the water turbine unit (10); The unit (10) is connected to the generator; A hollow steel plate (23) capable of floating with the liquid surface in the water-gas co-containment cabin (2) is provided in the water-gas co-containment cabin (2); there is a spiral guide rail (24) inside the wall of the water-gas co-containment cabin (2) , the hollow steel plate (23) slides in the spiral guide rail (24) with the liquid surface; the lower surface of the circular hollow steel plate (23) is an inclined surface, and the cross-section of the hollow steel plate (23) volume symmetry plane is a right triangle, and its Larger acute angle and helical guide rail (24) helix angle are identical; The inclined surface below circular hollow steel plate (23) is provided with the steel plate (27) that vertically places, and the lower surface of steel plate (27) and circular hollow steel plate ( 23) The upper surface is parallel; there is a ring of ferrule (22) at the upper water level inside the water-air compatibility cabin (2), and the ferrule (22) can coincide with the hollow steel plate (23); The gas outlets on the upper end of the water-gas compatibility cabin (2) are respectively connected to the turbine (4) and the booster (5) through valves, and the turbine (4) and the booster (5) are respectively connected to the gas storage shaft through valves (3); the outer side of the gas storage shaft (3) is provided with thermal insulation paint (29), thermal insulation shell (30) and waterproof material (31); The supercharger (5) is connected to the electric motor (12) and the compressor unit (6), and the turbine (4) is connected to the generator (13). 2. The high-pressure adiabatic gas storage pumping compressed air energy storage system according to claim 1, characterized in that the supercharger (5) adopts a volumetric piston compressor or a screw compressor, and the supercharger adopts multiple parallel-connected Working mode: The turbine (4) is equipped with a moving and stationary vane adjusting device, and adopts a sliding pressure operation mode. 3. The high-pressure adiabatic gas storage pumping compressed air energy storage system according to claim 1, characterized in that the gas storage shaft (3) is used to store high-pressure air, and the gas storage shaft (3) includes the upper industrial pipeline and the lower industrial pipeline. The pipeline, the upper section industrial pipeline and the lower section industrial pipeline are connected by a flange (32); the thickness of the upper section industrial pipeline pipe wall is greater than the lower section industrial pipeline pipe wall thickness, and the inner diameter of the upper section industrial pipeline is smaller than the lower section industrial pipeline inner diameter. 4. The high-pressure adiabatic gas storage pumping compressed air energy storage system according to claim 3, characterized in that the water turbine unit (10), the water pump unit (9), the turbine (4), the supercharger (5), the compressor The unit (6) and all valves are connected to the controller (8). 5. The high-pressure adiabatic gas storage pumping compressed air energy storage system according to claim 3, characterized in that a liquid level sensor (19) and a pressure sensor (20) are installed on the top of the water-gas coexistence cabin (2), and the liquid Both position sensor (19) and pressure sensor (20) are connected to controller (8).