Water replenishing device system for hydraulic compressed air energy storage

Abstract

The utility model provides a water supplementing device system for hydraulic compressed air energy storage. The water supplementing device system comprises an air storage device, a water storage device, a hydraulic power generation device, a water supplementing device, an air conveying pipeline and a water conveying pipeline. An inlet and an outlet of the gas pipeline are connected with the gas storage device and the water storage device respectively, the outlet of the gas pipeline is further provided with a jet assembly, an inlet and an outlet of the water pipeline are connected with the water storage device and the water storage device respectively, and the hydroelectric generation device is connected with the water storage device and the water storage device. The water supplementing device comprises a high-level water tank and a water supplementing pipeline, the bottom elevation of the high-level water tank is larger than the outlet elevation of the gas conveying pipeline, the outlet end of the high-level water tank is connected with the jet flow assembly, and the inlet end of the high-level water tank is connected with the water storage device through the water supplementing pipeline. The jet flow assembly is arranged on the air conveying pipeline to dynamically supplement water into the water storage device, heat exchange between water and compressed air is facilitated, and the hydraulic acting time is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of hydraulic compressed air energy storage technology relates to a kind of water replenishing device systems for hydraulic compressed air energy storage. BACKGROUND

[0002] As an innovative energy storage and utilization method, the hydraulic compressed air energy storage system can stably output power, has the characteristics of large capacity, long service life, safety and environmental protection, and is one of the key technologies for the rapid development of energy storage and the improvement of energy security utilization.

[0003] CN206135550U discloses a composite water wheel power generation and air compression energy storage system, comprising an air compressor, a water wheel generator and a transformer, a pressure gauge is arranged on the air compressor, the air compressor is connected with a water container, the water container is connected with the water wheel generator, the water wheel generator is connected with the transformer, the transformer is connected with a national power grid, the water wheel generator is connected with a circulating water container, the circulating water container is connected with a circulating water pump, one end of the circulating water pump is connected with the water container, and the other end of the circulating water pump is connected with the air compressor.

[0004] CN118911899A discloses a pressure grading jacketed heat exchanger hydraulic compressed air energy storage system, comprising at least one first jacketed heat exchanger and a plurality of second jacketed heat exchangers; the first jacket of the first jacketed heat exchanger and the second jacket of the second jacketed heat exchanger are connected with a water storage tank through a first water pump; the first internal reactor of the first jacketed heat exchanger stores compressed air, and the second internal reactor of the second jacketed heat exchanger stores air and water; the first internal reactor of the first jacketed heat exchanger is in communication with the second internal reactor of the second jacketed heat exchanger; the second internal reactors of the plurality of second jacketed heat exchangers are in communication with each other and have different pressure levels; the water inlet of each second internal reactor is connected with a second water pump, and the water outlet is connected with a water turbine; the second water pump and the water turbine are connected with the water storage tank respectively, overcoming the problem that the operating conditions of the energy storage system are affected by seasonal environmental temperature changes, and ensuring the stable average cycle efficiency of the energy storage system under long-term operation.

[0005] However, the existing hydraulic compressed air energy storage system mainly compresses the air in the closed tank by a high-pressure water pump to form high-pressure air energy storage, and the compressed air expands to push the water in the tank to flow, and then to drive the water turbine to generate electricity, and in the process, because the air compression ratio is very large, when expanding to do work, it needs to push the water of the same volume after expansion, and a large number of water tanks need to be equipped, which increases the energy storage cost investment. Practical new type content

[0006] In view of the deficiencies of the prior art, the utility model discloses a kind of water replenishing device systems for hydraulic compressed air energy storage, by being provided with jet assembly on gas pipeline, when air expansion pushes water to do work and generate electricity, it uses the high flow rate of compressed air to form siphon effect, dynamically replenish water in water storage device, it is favorable to heat exchange of water and compressed air, effectively prolongs hydraulic work time, simultaneously, it increases the effective water quantity of work and generate electricity in turn, improves energy storage efficiency.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model discloses a kind of water replenishing device systems for hydraulic compressed air energy storage, including gas storage device, water storage device, water storage device, hydroelectric device, water replenishing device, gas pipeline and water pipeline;The import and export of the gas pipeline are connected with the gas storage device and the water storage device respectively, the export of the gas pipeline is also provided with jet assembly, the import and export of the water pipeline are connected with the water storage device and the water storage device respectively, and the hydroelectric device is connected with the water storage device and the water storage device respectively;The water replenishing device includes high-level water tank and water replenishing pipeline, the bottom elevation of the high-level water tank is greater than the export elevation of the gas pipeline, the export end of the high-level water tank is connected with the jet assembly, and the import end of the high-level water tank is connected with the water storage device by the water replenishing pipeline.

[0009] The device system of the utility model makes compressed air flow through jet assembly to produce local negative pressure when air in gas storage device expands and enters water storage device through gas pipeline to do work, to inject water in high-level water tank into water storage device, realizes the process of doing work and replenishing water simultaneously, solves the problem of dynamic water replenishment in the process of hydraulic compressed air power generation.Meanwhile, based on the water injection of airflow and jet assembly, energy is saved, effective water quantity is dynamically improved, and water storage device equipment investment is reduced.In addition, through the water replenishing process of circulating water in water storage device, water is used as compressed air energy storage heat accumulator, dynamically supplements heat to air, strengthens water and air heat exchange, and achieves energy-saving purpose.

[0010] As an optimal technical scheme of the utility model, the jet flow assembly has a compressed air interface, a positive pressure output interface and a negative pressure interface, the compressed air interface, the positive pressure output interface and the negative pressure interface are in communication inside the jet flow assembly, the compressed air interface is communicated with the outlet of the gas pipeline, the positive pressure output interface is communicated with the water storage device, and the negative pressure interface is communicated with the high-level water tank.

[0011] The jet flow assembly of the utility model takes the high-speed air flowing to the water storage device as power, connects the high-level water tank through the negative pressure interface, and injects the high-speed air flow and the water supplement into the water storage device, realizes dynamic water supplement, and ensures the full mixing of water and air.

[0012] As an optimal technical scheme of the utility model, the high-level water tank is connected with the negative pressure interface through the water diversion branch pipe, and a stop valve is arranged on the water diversion branch pipe.

[0013] As an optimal technical scheme of the utility model, the compressed air interface and the positive pressure output interface are arranged at opposite ends of the jet flow assembly, and the negative pressure interface is arranged at the side end of the jet flow assembly.

[0014] As an optimal technical scheme of the utility model, a high-pressure pump assembly is arranged on the water pipeline, and a low-pressure pump assembly is arranged on the water supplement pipeline.

[0015] As an optimal technical scheme of the utility model, a compressed air pressure regulating valve is further arranged on the gas pipeline.

[0016] As an optimal technical scheme of the utility model, an electric regulating valve is arranged at the outlet end of the high-pressure pump assembly.

[0017] As an optimal technical scheme of the utility model, the gas storage device of the gas storage container comprises at least one closed gas storage container, and the water storage device of the gas pressure water tank comprises at least one closed gas pressure water tank.

[0018] As an optimal technical scheme of the utility model, a liquid level detection assembly is arranged in the gas pressure water tank.

[0019] As an optimal technical scheme of the utility model, the water power generation device comprises a water turbine set.

[0020] The system refers to an equipment system, a device system or a production device.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] The water supplementing device system for hydraulic compressed air energy storage provided by the utility model utilizes the characteristics that air expands and flows into the water storage device at high speed, sets the jet assembly on the gas conveying pipeline, realizes the dynamic water supplementing of the water storage device, increases the effective working water volume, prolongs the effective working power generation time of the water storage device, reduces the number of water tanks, and is favorable for reducing equipment investment. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure schematic view of the water supplementing device system for hydraulic compressed air energy storage provided by the utility model one specific implementation mode.

[0024] Figure 2 For Figure 1 The connection schematic view of the jet assembly at A with the gas storage device, the water storage device and the high-level water tank.

[0025] 1-gas storage device; 2-water storage device; 3-water storage device; 4-hydropower device; 5-high-level water tank; 6-jet assembly; 7-gas conveying pipeline; 8-water conveying pipeline; 9-water supplementing pipeline; 10-high-pressure pump assembly; 11-low-pressure pump assembly; 12-stop valve; 13-electric regulating valve; 14-compressed air pressure regulating valve; 15-liquid level detection assembly. DETAILED DESCRIPTION

[0026] It should be understood that, in the description of the utility model, the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] It should be noted that in the description of the utility model, unless otherwise explicitly defined and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0028] The technical scheme of the utility model will be further illustrated below by specific embodiments in conjunction with the drawings.

[0029] In one specific embodiment, the utility model provides a kind of water replenishing device system for hydraulic compressed air energy storage, as shown in Figure 1 The inlet and outlet of the gas pipeline 7 are connected with the gas storage device 1 and the water storage device 2 respectively. As shown in Figure 2 The outlet of the gas pipeline 7 is further provided with a jet assembly 6, when air expansion pushes water power to generate electricity, the air in the gas storage device 1 flows to the water storage device 2 through the jet assembly 6 from the gas pipeline 7. The inlet and outlet of the water pipeline 8 are connected with the water storage device 2 and the water storage device 3 respectively, and the hydraulic power generation device 4 is connected with the water storage device 2 and the water storage device 3 respectively. When energy is stored, the water in the water storage device 3 enters the water storage device 2 to compress air; when energy is released, the water in the water storage device 2 enters the hydraulic power generation device 4 to do work and generate electricity, and the used water is recycled to the water storage device 3. The water replenishing device includes a high-level water tank 5 and a water replenishing pipeline 9, the bottom elevation of the high-level water tank 5 is higher than the outlet elevation of the gas pipeline 7, the outlet end of the high-level water tank 5 is connected with the jet assembly 6, and the inlet end of the high-level water tank 5 is connected with the water storage device 3 through the water replenishing pipeline 9, and the used circulating water is used to dynamically replenish water to the water storage device 2.

[0030] Specifically, the jet flow assembly 6 has a compressed air interface, a positive pressure output interface and a negative pressure interface, which are in communication inside the jet flow assembly. Specifically, the compressed air interface and the positive pressure output interface are arranged at opposite ends of the jet flow assembly, and the negative pressure interface is arranged at the side end of the jet flow assembly. The compressed air interface is communicated with the outlet of the gas pipeline 7, the positive pressure output interface is communicated with the water storage device 2, and the negative pressure interface is communicated with the high-level water tank 5. The jet flow assembly 6 generates a negative pressure area inside based on high-speed air flow and siphon effect, and water in the high-level water tank 5 is introduced into the water storage device 2, and air and water are injected at the same time, so that water and air can be fully contacted in the water storage device 2 for heat exchange. The utility model does not need a high-pressure water pump, and completely uses air flow and a jet flow assembly to complete water injection, saves energy, and dynamically improves the capacity of the water storage device 2. Further, the high-level water tank 5 is connected with the negative pressure interface through a water diversion branch pipe, and a stop valve 12 is arranged on the water diversion branch pipe. When the energy release and power generation are finished, the stop valve 12 is closed in advance to prevent water flow in the pipeline from flowing back under the pressure of the energy storage system.

[0031] It should be noted that the structure of the jet flow assembly 6 in the utility model is not limited, and must include a nozzle, a suction chamber and a diffuser pipe for realizing a complete process, ensuring that water flow and high-speed air flow are mixed and sprayed, and a person skilled in the art can add layout by himself based on process flow and equipment structure selection, and the utility model does not have special requirements and specific limitations.

[0032] In some embodiments, the gas storage device 1 includes at least one closed gas storage container for storing compressed air. When initially storing energy, the compressed air in the gas storage container is injected by an external air compressor, and the injection is stopped when the pressure in the gas storage container reaches a preset pressure. The gas storage container can be a vertical closed gas tank or a horizontal closed gas tank, including but not limited to a common air bag type gas pressure tank, a diaphragm type gas pressure tank or a full replacement type gas pressure tank in the art.

[0033] In some embodiments, the water storage device 2 includes at least one closed air pressure tank containing a mixture of compressed air and water. A liquid level detection assembly 15 is arranged in the air pressure tank to detect the water level in the air pressure tank. During energy storage, water in the water storage device 3 is input into the air pressure tank to store energy by compressing air. During energy release, air expands to push water to flow into the hydroelectric power generation device 4 to generate power. The air pressure tank can be a vertical closed water tank or a horizontal closed water tank. The jet assembly 6 and the water replenishment device are used in cooperation to form a siphon effect by using high-speed air flow to dynamically replenish water in the water storage device 2, thereby prolonging the working time of a single air pressure tank, increasing the volume of the water storage device 2, reducing the number of air pressure tanks, and saving investment.

[0034] When the number of gas storage containers and / or air pressure tanks is multiple, the gas delivery pipeline 7 is formed by connecting multiple branch pipes connecting the gas storage containers and the air pressure tanks in parallel, and a compressed air pressure regulating valve 14 is arranged on the gas delivery pipeline 7 to regulate the input amount of compressed air.

[0035] In some embodiments, a high-pressure pump assembly 10 is arranged on the water delivery pipeline 8, and an electric regulating valve 13 is arranged at the outlet end of the high-pressure pump assembly 10. The water in the water storage device 3 is pumped into the air pressure tank by the high-pressure pump assembly 10 to form a strong water flow to exchange heat with air. The high-pressure pump assembly 10 can be any one of a centrifugal pump, a vortex pump, a axial flow pump, a piston pump, a Roots pump, or a screw pump, and the present application does not make specific limitations thereon. Those skilled in the art can select different water pumps according to actual process requirements.

[0036] A low-pressure pump assembly 11 is arranged on the water replenishment pipeline 9 to pump the recycled water in the water storage device 3 into the high-level water tank 5 after use. Since the recycled water absorbs heat during the air compression process, the recycled water can be replenished into the water storage device 2 by the jet assembly 6 when the air expands to absorb heat, so that the water and the air exchange heat sufficiently, the heat is transferred to the air, the energy is complementary, and the temperature balance is ensured. The low-pressure pump assembly 11 includes but is not limited to a centrifugal pump, a vortex pump, a axial flow pump, a piston pump, a Roots pump, or a screw pump, and the present application does not make specific limitations thereon. Those skilled in the art can select different water pumps according to actual process requirements.

[0037] In some embodiments, the water power generation device 4 comprises a water turbine set, when the device system generates electricity in the energy release mode, the compressed high-pressure air expands, the air flow is input into the water storage device 2 at high speed through the jet assembly 6, and then the water in the water storage device 2 is pushed to flow, and the water turbine set is driven to generate electricity, and the negative pressure generated by the high-speed air flow in the jet assembly 6 inputs the water in the high-position water tank 5 into the water storage device 2 to dynamically supplement the water, and the effective water amount of the water storage device 2 is increased.

[0038] It should be noted that the water supplementing device system of the utility model also has necessary connecting pipelines and switch control valves, and the utility model does not specially limit this, and the person skilled in the art needs to reasonably adjust, add or delete according to the actual production needs, and it should be clear that the new technical solutions generated by deleting part of the unnecessary connecting pipelines and switch control valves, or replacing the single-function switch control valve into the multifunction integrated control valve, or the automatic control system electrically connected with the switch control valve is used to control the opening of the corresponding valve and other common and well-known conventional technical means of the person skilled in the art also fall within the disclosure range and protection range of the utility model.

[0039] The applicant declares that the above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, and the person skilled in the art should understand that any change or replacement easily thought of by the person skilled in the art within the technical range disclosed by the utility model also falls within the protection scope and disclosure range of the utility model.

Claims

1. A water replenishing device system for hydro-compressed air energy storage, characterized in that, The system comprises a gas storage device, a water storage device, a water storage device, a water power generation device, a water supplement device, a gas pipeline and a water pipeline; the inlet and outlet of the gas pipeline are connected with the gas storage device and the water storage device respectively, the outlet of the gas pipeline is further provided with a jet assembly, the inlet and outlet of the water pipeline are connected with the water storage device and the water storage device respectively, and the water power generation device is connected with the water storage device and the water storage device respectively; the water supplement device comprises a high-level water tank and a water supplement pipeline, the bottom elevation of the high-level water tank is higher than the outlet elevation of the gas pipeline, the outlet end of the high-level water tank is connected with the jet assembly, and the inlet end of the high-level water tank is connected with the water storage device through the water supplement pipeline.

2. The water replenishment device system for hydro-compressed air energy storage of claim 1, wherein, The jet assembly has a compressed air interface, a positive pressure output interface and a negative pressure interface, the compressed air interface, the positive pressure output interface and the negative pressure interface are in communication inside the jet assembly, the compressed air interface is connected with the outlet of the gas pipeline, the positive pressure output interface is connected with the water storage device, and the negative pressure interface is connected with the high-level water tank.

3. The water replenishment device system for hydro-compressed air energy storage of claim 2, wherein, The high-level water tank is connected with the negative pressure interface through a water diversion branch pipe, and a stop valve is arranged on the water diversion branch pipe.

4. The water replenishment device system for hydro-compressed air energy storage of claim 2 or 3, wherein, The compressed air interface and the positive pressure output interface are arranged at opposite ends of the jet assembly, and the negative pressure interface is arranged at a side end of the jet assembly.

5. The water replenishment device system for hydro-compressed air energy storage of claim 1, wherein, A high-pressure pump assembly is arranged on the water pipeline, and a low-pressure pump assembly is arranged on the water supplement pipeline.

6. The water replenishment device system for hydro-compressed air energy storage of claim 5, wherein, A compressed air pressure regulating valve is further arranged on the gas pipeline.

7. The water replenishment device system for hydro-compressed air energy storage of claim 5, wherein, An electric regulating valve is arranged at the outlet end of the high-pressure pump assembly.

8. The water replenishment device system for hydro-compressed air energy storage of claim 1, wherein, The gas storage device comprises at least one closed gas storage container, and the water storage device comprises at least one closed gas pressure water tank.

9. The water replenishment device system for hydro-compressed air energy storage of claim 8, wherein, A liquid level detection assembly is arranged in the gas pressure water tank.

10. The water replenishment device system for hydro-compressed air energy storage of claim 1, wherein, The water power generation device comprises a water turbine set.

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