High-pressure energy storage adjusting system based on air liquefaction system

Abstract

The utility model discloses a high pressure energy storage regulating system based on air liquefaction system, including new energy power generation unit, gas storage unit, energy release unit, gas source power generation unit and control system, gas storage unit includes air compressor, heat exchange cooling device, gas storage tank, energy release unit includes preheating box, heating box and expansion machine, the new energy power generation unit, the gas storage unit, the energy release unit and the gas source power generation unit are combined for use, and in the power generation peak period of a photovoltaic power station or a wind power station, when the electric energy is excessive and sufficient, the overloaded electric energy is used for driving the air compressor to work to generate compressed air; and during the power generation valley period of the photovoltaic power station or the wind power station, compressed air is released to expand the compressed air for power generation, and electric energy can be stored during the power consumption valley period and released during the peak period, so that the load of the power grid is effectively balanced, and the stability and the reliability of the power grid are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressed air energy storage technology field, concretely relates to a high pressure energy storage regulating system based on air liquefaction system. BACKGROUND

[0002] New energy refers to the renewable energy that is developed and utilized on the basis of new technology, including solar energy, biomass energy, wind energy, geothermal energy, wave energy, ocean current energy and tidal energy etc. Compared with the traditional power generation mode (for example, thermal power), the power generation using new energy has the advantages of being clean and not polluting the environment. Among them, photovoltaic power generation and wind power generation have become widely used power generation modes.

[0003] However, the power generation of photovoltaic power stations and wind power stations is extremely susceptible to external environment, when the light condition is good and the wind is sufficient, the power station has large power generation and abundant electric energy, which is inconvenient to store, on the contrary, the power generation is reduced, and there are problems of intermittency and instability. It cannot be used efficiently. Therefore, it is necessary to continuously improve the energy utilization rate of solar photovoltaic cells to solve the intermittency and volatility defects.

[0004] Pumped storage energy as a kind of energy storage mode has been applied in large-scale photovoltaic power generation system and wind power generation system as the main energy storage mode, but pumped storage energy needs high height difference and a large amount of water, which leads to the need of a large amount of funds and high construction technology for pumped storage energy infrastructure, not only difficult to popularize in a large area, but also not suitable for wind power stations with high terrain and photovoltaic power generation systems distributed in vast rural areas and water resource scarce areas. SUMMARY

[0005] To solve the above problems, the utility model provides a kind of high pressure energy storage regulating device based on air liquefaction system to the low requirement of terrain and water source and can effectively make up the intermittency and volatility defects of solar photovoltaic power station and wind power station.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a kind of high pressure energy storage regulating system based on air liquefaction system, including new energy power generation unit, gas storage unit, energy release unit, gas source power generation unit and control system, the new energy power generation unit is photovoltaic power station, the power supply of control system is connected with photovoltaic power station electricity by cable, the gas storage unit includes air compressor, heat exchange cooling device, gas tank.

[0007] The air compressor is connected with the control system through wires, and a rectangular protective shell is arranged on the air compressor, a maintenance door which can be opened and closed is arranged on the left end face of the protective shell, a heat dissipation air blowing pump is arranged on one side of the maintenance door, a blowing pipe of the heat dissipation air blowing pump penetrates into the protective shell, and a blowing opening of the blowing pipe is opposite to the air compressor, heat dissipation holes are arranged on the rear end face of the protective shell, and an air inlet pipe and an air outlet pipe of the air compressor respectively penetrate out of the protective shell, and a gas collecting cover is arranged on the air inlet pipe.

[0008] The heat exchange cooling device comprises a heat exchange box, a heat exchange pipe, a cold water tank, a refrigeration tank and a cooling pipe, the heat exchange box is arranged on one side of the air outlet pipe of the air compressor, a temperature sensor is arranged in the heat exchange box, a drain pipe with a solenoid valve is arranged at the bottom, the cold water tank is arranged above the heat exchange box, a water outlet pipe at the bottom of the cold water tank is connected with the heat exchange box, a solenoid valve is arranged on the water outlet pipe, the heat exchange pipe is a turbine-shaped heat exchange coil pipe, is arranged in the heat exchange box, and an air inlet end and an air outlet end of the heat exchange pipe penetrate out of the heat exchange box, the air inlet end is connected with the air outlet pipe of the air compressor, the refrigeration tank is arranged on one side of the heat exchange box, a refrigeration component is arranged on the inner side wall of the refrigeration tank, and the cooling pipe is a coil pipe structure, is arranged in the refrigeration tank, and an air inlet end and an air outlet end of the cooling pipe penetrate out of the refrigeration tank, and the air inlet end is connected with the air outlet end of the heat exchange pipe through a connecting pipe.

[0009] The gas storage tank is arranged on one side of the refrigeration tank, the inlet of the gas storage tank is connected with the cooling pipe through a solenoid valve, the bottom end is provided with two connecting pipes, one of the connecting pipes is connected with the energy releasing unit, and the other connecting pipe is connected with an external high-pressure energy storage pipeline or a transport tank, and each electric control component in the gas storage unit is connected with the control system through wires.

[0010] The energy releasing unit comprises a preheating box, a heating box and an expander, the preheating box is a heat preservation box structure, a water outlet pipe is arranged at the bottom, and a water inlet pipe is arranged at the top, the water inlet pipe is connected with the drain pipe of the heat exchange box, a preheating coil pipe is arranged in the preheating box, a connecting pipe with a solenoid valve is arranged between the air inlet end of the preheating coil pipe and the connecting pipe of the gas storage tank, the heating box is arranged on one side of the preheating box, a heating coil pipe is arranged in the heating box, the air inlet end of the heating coil pipe is connected with the air outlet end of the preheating coil pipe, and the air inlet end of the expander is connected with the air outlet end of the heating coil pipe.

[0011] The gas source power generation unit comprises a steam turbine and a generator, the air inlet end of the steam turbine is connected with the air outlet pipe of the expander, and the rotor shaft coupling of the steam turbine is connected with the rotor shaft coupling of the generator to rotate and generate electricity.

[0012] As an optimization scheme of the case, the new energy power generation unit is a wind power station.

[0013] As an optimization scheme of the case, the number of the gas storage units can be N groups, and N is 2-10.

[0014] As the optimization scheme of the case, in order to prevent the air compressor from inhaling a large amount of dust and waste residues during work, affecting the compression effect, the inlet of the gas collecting hood is provided with a detachable filter screen, and the inner cavity is provided with activated carbon filter cotton plate.

[0015] Effect: ①. The new energy power generation unit, the gas storage unit, the energy release unit and the gas source power generation unit are used in combination, when the power generation peak period of the photovoltaic power station or the wind power station, the excess power is used to drive the air compressor to work to produce compressed air, and the compressed air is liquefied and stored, when the power generation trough period of the photovoltaic power station or the wind power station, the compressed air is released to expand and generate electricity, effectively reducing the energy loss, improving the power generation capacity of the power station, storing the electric energy in the power consumption trough period, releasing in the peak period, effectively balancing the power grid load, improving the stability and reliability of the power grid, sustainable development, and meeting the demand of human beings for sustainable energy.

[0016] ②. The utility model is suitable for large-scale energy storage application, and is suitable for storing renewable energy such as wind energy and solar energy. DETAILED DESCRIPTION

[0017] Figure 1 It is a structural schematic view of the utility model in embodiment 1.

[0018] Figure 2 It is a structural schematic view of the gas storage unit in the utility model.

[0019] Figure 3 It is a structural schematic view of the energy release unit in the utility model.

[0020] Figure 4 It is a structural schematic view of the utility model in embodiment 2.

[0021] Figure 5 It is a structural schematic view of the gas collecting hood in embodiment 2 of the utility model.

[0022] In the drawing: 1, new energy power generation unit; 2, air compressor; 3, gas collecting hood; 4, gas storage tank; 5, control system; 6, heat dissipation air blowing pump; 7, heat exchange box; 8, heat exchange pipe; 9, cold water tank; 10, refrigeration tank; 11, cooling pipe; 12, preheating box; 13, heating box; 14, expander; 15, steam turbine; 16, generator. DETAILED DESCRIPTION

[0023] The utility model is further described in connection with the drawings and embodiments.

[0024] Wherein the same parts are indicated by the same reference signs. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component, and the drawings are in a very simplified form, using non-precise ratios, only to facilitate, clarify the purpose of assisting in the description of the embodiments of the present application. Embodiment 1

[0025] As Figures 1-3 shown, the embodiment discloses a high-pressure energy storage regulating system based on an air liquefaction system, which is used for the utilization of the electrical energy of a photovoltaic power station during overload, and improves the power generation effect, and specifically comprises a new energy power generation unit 1, an air storage unit, an energy release unit and an air source power generation unit.

[0026] Referring to Figure 1 , the new energy power generation unit 1 is a photovoltaic power station, the power supply of the control system 5 is connected to the photovoltaic power station through a cable, and the air storage unit comprises an air compressor 2, a heat exchange cooling device and an air storage tank 4.

[0027] As Figure 2 can be seen, the air compressor 2 is connected to the control system 5 through a wire, a rectangular protective shell is arranged on the air compressor 2, a maintenance door that can be opened and closed is arranged on the left end face of the protective shell, a heat dissipation air blowing pump 6 is arranged on one side of the maintenance door, a blowing pipe of the heat dissipation air blowing pump 6 penetrates into the protective shell, a blowing port of the heat dissipation air blowing pump 6 is opposite to the air compressor 2, a heat dissipation hole is arranged on the rear end face of the protective shell, and an air inlet pipe and an air outlet pipe of the air compressor 2 respectively penetrate out of the protective shell, and an air inlet pipe port is provided with a gas collecting hood 3.

[0028] The specific structure is shown in Figure 2 , the heat exchange cooling device comprises a heat exchange box 7, a heat exchange pipe 8, a cold water tank 10, a refrigeration box and a cooling pipe 11, the heat exchange box 7 is arranged on one side of the air outlet pipe of the air compressor 2, a temperature sensor is arranged in the heat exchange box 7, a drain pipe with a solenoid valve is arranged at the bottom of the heat exchange box 7, the cold water tank 10 is arranged above the heat exchange box 7, a water outlet pipe at the bottom of the cold water tank 10 is connected to the heat exchange box 7, a solenoid valve is arranged on the water outlet pipe, the heat exchange pipe 8 is a turbine-shaped heat exchange coil pipe, is arranged in the heat exchange box 7, an air inlet end and an air outlet end of the heat exchange pipe 8 penetrate out of the heat exchange box 7, the air inlet end is connected to the air outlet pipe of the air compressor 2, the refrigeration box is arranged on one side of the heat exchange box 7, a refrigeration component is arranged on the inner side wall of the refrigeration box, and the cooling pipe 11 is in a coil structure, is arranged in the refrigeration box, an air inlet end and an air outlet end of the cooling pipe 11 penetrate out of the refrigeration box, and the air inlet end is connected to the air outlet end of the heat exchange pipe 8 through a connecting pipe.

[0029] As Figure 1 and Figure 2As can be seen, the gas tank 4 is arranged on one side of the refrigeration box, the inlet of the gas tank 4 is connected with the cooling pipe 11 through an electromagnetic valve, the bottom end is provided with two connecting pipes, one of which is connected with the energy release unit, and the other is connected with the external high-pressure energy storage pipeline, and the electric control components in the energy storage unit are connected with the control system 5 through wires.

[0030] Referring to Figure 3 , the energy release unit includes a preheating box 12, a heating box 13 and an expander 14, the preheating box 12 is a heat preservation box structure, the bottom is provided with a water outlet pipe, and the top is provided with a water inlet pipe, the water inlet pipe is connected with the drain pipe of the heat exchange box 7, a preheating coil is installed in the preheating box 12, the air inlet end of the preheating coil is connected with the connecting pipe of the gas tank 4 through a valve, the heating box 13 is located on one side of the preheating box 12, and a heating coil is installed in the heating box 13, the air inlet end of the heating coil is connected with the air outlet end of the preheating coil, and the air inlet pipe of the expander 14 is connected with the air outlet end of the heating coil.

[0031] Referring to Figure 1 , the gas source power generation unit includes a steam turbine 15 and a generator 16, the air inlet end of the steam turbine 15 is connected with the air outlet pipe of the expander 14, and the rotor shaft coupling of the steam turbine 15 is connected with the rotor shaft coupling of the generator 16 to rotate and generate electricity. Embodiment 2

[0032] As Figures 2-5 shown, the specific structure and implementation are as shown in the embodiment, and the difference lies in that the new energy power generation unit 1 is a wind power station.

[0033] Referring to Figure 4 and Figure 5 , in order to prevent a large amount of dust and waste residue from being sucked in and affecting the compression effect, a detachable filter screen is installed at the inlet of the gas collecting hood 3, and activated carbon filter cotton plates are installed in the inner cavity.

[0034] When working, when the conditions are good and the wind power is sufficient, the power station generates a large amount of electricity, and the electric energy is abundant and inconvenient to store, so that the overload electric energy is transmitted to the control system 5, the control system 5 opens the air compressor 2 to start working, the air compressor 2 compresses the inhaled air, and the generated compressed air enters the heat exchange pipe 8 in the heat exchange box 7, most of the heat is absorbed by the cooling water in the heat exchange box 7, when the cooling water reaches the preset temperature, it is transported to the preheating box 12 for storage, and the cooling water is supplemented from the cold water tank 10 to continue to absorb the heat of the compressed air, at this time, the compressed air continues to be transported to the refrigeration box to be cooled and liquefied to form liquid air which is stored in the gas tank 4.

[0035] When the compressed air needs to generate electricity, the air in the air tank 4 enters the preheating coil in the preheating tank 12 to be preheated, the compressed air comes out of the preheating tank 12 and enters the heating coil in the heating tank 13 to be heated, so that the temperature of the compressed air is increased to the ideal working temperature, and when the heated compressed air is released, the air density is reduced due to the high temperature, and after the heating is completed, the compressed air enters the expander 14, in the expansion process, the compressed air is rapidly released from the high pressure state, which drives the steam turbine 15 to rotate, thereby driving the generator 16 to generate electricity.

[0036] The above embodiment only illustrates the principle and effect of the present application, and is not used to limit the present application. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A high-pressure energy storage regulating system based on an air liquefaction system, comprising a new energy power generation unit (1), a gas storage unit, an energy release unit, a gas source power generation unit and a control system (5), the new energy power generation unit (1) being a photovoltaic power station, the power supply of the control system (5) being connected to the photovoltaic power station through a cable, characterized in that: The air storage unit comprises an air compressor (2), a heat exchange cooling device, and an air storage tank (4); the air compressor (2) is connected with the control system (5) through wires; a rectangular protective shell is arranged on the air compressor (2); a maintenance door which can be opened and closed is arranged on the left end surface of the protective shell; a heat dissipation air blowing pump (6) is arranged on one side of the maintenance door; an air blowing pipe of the heat dissipation air blowing pump (6) penetrates into the protective shell, and an air blowing port of the heat dissipation air blowing pump (6) is opposite to the air compressor (2); a heat dissipation hole is arranged on the rear end surface of the protective shell; an air inlet pipe and an air outlet pipe of the air compressor (2) respectively penetrate out of the protective shell; and a gas collecting cover (3) is arranged on the air inlet pipe. ​ The heat exchange cooling device comprises a heat exchange box (7), a heat exchange pipe (8), a cold water tank (9), a refrigeration tank (10), and a cooling pipe (11); the heat exchange box (7) is arranged on one side of the air outlet pipe of the air compressor (2); a temperature sensor is arranged in the heat exchange box (7); a drain pipe with an electromagnetic valve is arranged at the bottom of the heat exchange box (7); the cold water tank (9) is arranged above the heat exchange box (7); a water outlet pipe at the bottom of the cold water tank (9) is connected with the heat exchange box (7); an electromagnetic valve is arranged on the water outlet pipe; the heat exchange pipe (8) is a turbine-shaped heat exchange coil pipe; the heat exchange pipe (8) is arranged in the heat exchange box (7); an air inlet end and an air outlet end of the heat exchange pipe (8) penetrate out of the heat exchange box (7); the air inlet end is connected with the air outlet pipe of the air compressor (2); the refrigeration tank (10) is arranged on one side of the heat exchange box (7); a refrigeration component is arranged on the inner side wall of the refrigeration tank (10); the cooling pipe (11) is a coil pipe structure; the cooling pipe (11) is arranged in the refrigeration tank (10); an air inlet end and an air outlet end of the cooling pipe (11) penetrate out of the refrigeration tank (10); the air inlet end is connected with the air outlet end of the heat exchange pipe (8) through a connecting pipe. The air storage tank (4) is arranged on one side of the refrigeration tank (10); an inlet of the air storage tank (4) is connected with the cooling pipe (11) through an electromagnetic valve; two connecting pipes are arranged at the bottom of the air storage tank (4); one of the connecting pipes is connected with an energy releasing unit; the other connecting pipe is connected with an external high-pressure energy storage pipeline or a transportation tank; each electric control component in the air storage unit is connected with the control system (5) through wires. The energy releasing unit comprises a preheating box (12), a heating box (13), and an expander (14); the preheating box (12) is a heat preservation box structure; a water inlet pipe is arranged at the top of the preheating box (12); a water outlet pipe is arranged at the bottom of the preheating box (12); the water inlet pipe is connected with the drain pipe of the heat exchange box (7); a preheating coil pipe is arranged in the preheating box (12); an air inlet end of the preheating coil pipe is connected with a connecting pipe with an electric valve; the connecting pipe is connected with the connecting pipe of the air storage tank (4); the heating box (13) is arranged on one side of the preheating box (12); a heating coil pipe is arranged in the heating box (13); an air inlet end of the heating coil pipe is connected with an air outlet end of the preheating coil pipe; an air inlet pipe of the expander (14) is connected with an air outlet end of the heating coil pipe. The air source power generation unit comprises a steam turbine (15) and a generator (16); an air inlet end of the steam turbine (15) is connected with an air outlet pipe of the expander (14); a rotor shaft coupling of the steam turbine (15) is connected with a rotor shaft coupling of the generator (16) to rotate and generate electricity.

2. The high pressure energy storage regulation system based on air liquefaction system of claim 1, wherein: The new energy power generation unit (1) is a wind power station.

3. A high pressure energy storage conditioning system based on air liquefaction system according to claim 1 or 2, characterized in that: The number of the air storage units can be N groups, and N is 2-10.

4. The high pressure energy storage conditioning system based on air liquefaction system of claim 1 or 2, wherein: The detachable filter screen is installed at the inlet of the gas collecting hood (3), and the inner cavity is provided with activated carbon filter cotton board.

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