Air exhaust and cold return type liquid air energy storage power station

Abstract

The invention relates to an air exhaust and cold return type liquid air energy storage power station, which adopts a high-pressure gas turbine air exhaust and heat return / cold return liquefaction process, cold energy of high-pressure liquid air is convenient to recover during energy release, the process is simplified, and the byproduct low-pressure liquid air can be used for storing energy, preparing liquid oxygen, liquid nitrogen or nitrogen and supplying cold, so that the energy storage efficiency is improved. And the method is a novel operation process and an economical process.

Description

Technical Field

[0001] The present invention relates to an air extraction and cooling type liquid air energy storage power station (liquid air refers to liquid air, the same below), and in particular to a liquid air energy storage power station using gas turbine air extraction and cooling liquefaction technology. Background Art

[0003] Since photovoltaic and wind power generation are random and intermittent, and electricity has the characteristics of real-time balance of supply and demand and is difficult to store on a large scale, the large-scale grid-connected photovoltaic and wind power generation will aggravate the dual volatility and uncertainty on both the supply and demand sides of the power system, making system peak regulation difficult and bringing about a series of problems such as abandoned solar and wind power. Energy storage can smooth out the instability of photovoltaic and wind power generation and achieve a dynamic balance of electricity supply and demand.

[0004] In the summer, electricity demand is strong, and the peak-valley electricity price difference continues to expand. In 17 provinces and regions, the peak-valley electricity price difference exceeds 0.7 yuan / kWh, and the economic benefits of industrial and commercial energy storage projects are highlighted. In July 2024, with the arrival of summer, the peak-valley electricity price difference in various regions across the country has widened. A total of 17 regions have a peak-valley electricity price difference of more than 0.7 yuan / kWh. The top three are Guangdong Province (five cities in the Pearl River Delta), Hainan Province, and Jiangsu Province. The largest peak-valley price differences reached 1.27 yuan / kWh, 1.22 yuan / kWh, and 1.14 yuan / kWh, respectively, and the economic benefits of peak-valley arbitrage have been significantly improved. Even in the spring when electricity demand is relatively stable, there are still 16 regions with a peak-valley electricity price difference of more than 0.7 yuan / kWh in March, which effectively guarantees the profitability stability of peak-valley arbitrage of industrial and commercial energy storage systems in the year-round dimension.

[0005] The new energy power supply system will face problems such as mismatch between power supply and demand, and energy storage, virtual power plants, microgrids and other regulatory means are indispensable. Electricity is a dynamic process energy that is not easy to store. It is mainly achieved through the power grid to achieve simultaneous production, transmission and consumption. The power generation method of new energy (such as wind power and solar energy) is greatly affected by weather conditions and has the characteristics of intermittent, volatility and instability. Large-scale application will have an impact on the stability of the power grid. In order to cope with the power generation characteristics of new energy power generation, energy storage, virtual power plants, microgrids and other regulatory means will be widely used in the future. Therefore, the configuration of energy storage is indispensable in the future green power energy system, and the role of new energy storage in promoting the development and consumption of new energy and the safe and stable operation of the power system is gradually emerging.

[0006] Liquid air energy storage (LAES) is a new type of energy storage technology that stores energy by liquefying air. This technology uses the "compression-expansion" process of air to cool the compressed air to a liquid state for storage, completing the conversion of electrical energy and pressure energy. Compared with traditional compressed air energy storage systems (CAES), liquefied air energy storage technology realizes the storage of electrical energy in the form of liquid air. In addition to the many application advantages of compressed air energy storage technology, this technology does not require large pressure storage containers, thus getting rid of the restrictions on its site selection and construction due to factors such as geographical location. The energy storage density of this method is 10 to 40 times that of compressed air energy storage. It can store more energy in smaller containers, is not restricted by geographical conditions, and has more flexible site selection.

[0007] There are some demonstration projects of liquid compressed air energy storage (LAES) technology at home and abroad. For example, China Green Development is building the first domestic liquefied air energy storage demonstration project based on the 60,000 kW / 600,000 kW-hour liquefied air energy storage project in Haixi, Qinghai. At present, the project has completed the site selection and technical scheme demonstration, and has passed the feasibility study review organized by the State Grid Engineering Institute entrusted by the Qinghai Provincial Energy Bureau. It is handling the preliminary procedures such as environmental impact assessment, safety assessment, and access system approval. The project is scheduled to be put into operation in 2024, when it will become the world's most powerful liquefied air energy storage power station. In April 2022, China Green Development Investment Group Co., Ltd. and the Institute of Physical and Chemical Technology of the Chinese Academy of Sciences signed an investment agreement. The two parties established a liquefied air energy storage joint venture and an advanced energy storage joint research center, committed to realizing the industrialization of liquefied air energy storage technology. In December 2022, the liquid air energy storage technology research project applied by Hebei Jiantou Guorong Energy Service Co., Ltd. was successfully "unveiled" and was listed as a provincial science and technology plan project in Hebei Province. In addition, Jiangsu Jinhe Energy Technology Co., Ltd., a company in the heat storage industry, is also trying to enter this market.

[0008] Chinese patents such as CN201210266535.4-High-efficiency and high-pressure liquid air energy storage and release system, CN201310061963.8-Compressed air energy storage system, etc., have conducted in-depth research on liquid compressed air energy storage (LAES) technology.

[0009] The key equipment of LAES technology, such as compressors, high-pressure gas storage tanks, cryogenic expanders, liquid pumps, expansion generators and other domestic equipment, has been relatively mature, and the industrial chain is mature. As the capacity of the energy storage system increases, the cost will tend to decrease, and it is expected that LAES technology will usher in a broader application prospect in the future.

[0010] Therefore, drawing on the steam turbine extraction heating technology in the steam Rankine cycle, it is worthy of in-depth study to drill holes in the turbine of the gas turbine generator set in the LAES to extract low-pressure air (for example, about 0.5MPa), and use the liquid-air cooling energy transmitted from the high-pressure liquid storage tank to liquefy the extracted air of the gas turbine and realize the cooling and liquefaction. Summary of the invention

[0011] A pumping and cooling liquid air energy storage power station, the power station adopts a supplementary cooling circulation loop and a gas turbine pumping and cooling circulation loop, the supplementary cooling circulation loop refers to the liquid air coming out of the liquid storage tank 3, after being gasified by the hydraulic pump 4 and the cooling unit 2, then discharged through the low-temperature expander 5 and the cooling unit 2, entering the compressor 1 or the compressor 7 for pressurization, and then liquefied by the cooling unit 2, and entering the liquid storage tank 3, the mechanical work generated by the low-temperature expander 5 drags the brake 6 to supplement the cooling of the liquefaction process of the compressed air; or the air is pre-cooled and liquefied by the compressor 1 and the cooling unit 2, and a part of the air or liquid air diverted is discharged into the atmosphere through the cooling unit 2, the low-temperature expander 5, and the cooling unit 2, or enters the compressor 1 and / or the compressor 7 for pressurization, and then returns to the part of the gas phase air or liquid air diversion point diverted from the cooling unit 2, thereby forming a supplementary cooling circulation loop of the cold power circulation system;

[0012] When storing energy:

[0013] After being compressed by the compressor 1, the air enters the cooling unit 2 to be liquefied into liquid air, which is then sent to the liquid storage tank 3. The liquid air in the liquid storage tank 3 is then pressurized by the high-pressure pump 14 and enters the high-pressure liquid storage tank 22 for energy storage.

[0014] When releasing energy:

[0015] The high-pressure liquid air in the high-pressure liquid storage tank 22 is converted into gaseous high-pressure air 32 through the recooler 37. After the high-pressure air 32 is heated by the supplementary heat device 17, it enters the gas turbine 18 to expand and do work, driving the gas turbine generator 19 to generate electricity, and the gas turbine exhaust 21 is discharged; or the high-pressure liquid air in the high-pressure liquid storage tank 22 is converted into gaseous high-pressure air 32 through the recooler 37 and the heat exchanger 36, and then heated by the supplementary heat device 17, and enters the gas turbine 18 to expand and do work, driving the gas turbine generator 19 to generate electricity, and the outlet gas of the gas turbine 18 forms the gas turbine exhaust 21; the turbine exhaust 35 extracted from the gas turbine 18 is converted into liquid-phase air 38 through the recooler 37, and enters the liquid storage tank 3, thereby forming a gas turbine exhaust cooling circuit; or the turbine exhaust 35 extracted from the gas turbine 18 is converted into liquid-phase air 38 through the heat exchanger 36 and the recooler 37, and enters the liquid storage tank 2, thereby forming a gas turbine exhaust cooling circuit.

[0016] The reheater 17 of the gas turbine exhaust air return cooling circuit adopts a partition heat replenishment method, that is, the high-pressure and high-temperature air entering the gas turbine 18 through the reheater 17 is pure air.

[0017] The cooling unit 2 adopts a shell and tube, plate fin, microchannel or other type of cooling exchanger. Its structure and cooling elements are similar to the shell and tube heat exchanger, plate fin heat exchanger, microchannel or other type of heat exchanger in the traditional air separation process. Multiple cooling exchangers are combined together in series, parallel or series-parallel connection.

[0018] The heat source of the reheater 17 is one or more of the following thermal energies: compression heat generated by a compressor or an air compressor; industrial waste heat or waste heat; solar thermal energy; heat energy released by fuel combustion; geothermal energy; heat energy stored in a heat storage medium; the heat source of the reheater 17 is used to heat the high-pressure air 32.

[0019] The air compression and cooling process in the air extraction and cooling type liquid air energy storage power station also includes air purification and purification, which is used to remove solid matter and impurity gases in the air; the air purification and purification equipment is integrated in the compressor 1 and / or the compressor 7 and / or the cold exchange unit 2, or integrated in the connecting pipes of the compressor 1, the compressor 7, and the cold exchange unit 2.

[0020] The brake 6 of the cryogenic expander 5 includes but is not limited to a fan, a liquid pump, a compressor or an air compressor, and is used to recover the expansion work generated by the cryogenic expander 5 .

[0021] The air compressor 1 or compressor 7 is only used for distinction, and they are actually air compression and boosting equipment; hydraulic pumps or liquid air pumps, high-pressure pumps are also the same.

[0022] The compressed air in the air extraction and cooling type liquid air energy storage power station is an isobaric liquefaction process, which means that the raw air entering the cooling unit 2 does not need to be expanded, depressurized and refrigerated like the traditional air separation process. The air coming out of the compressor only has resistance losses of equipment and pipelines along the way, and can be regarded as an isobaric liquefaction process of air with little pressure change.

[0023] The air purification and reconditioning equipment in the air extraction and recooling type liquid air energy storage power station, wherein the purification equipment includes a molecular sieve purifier, a reversible cooler or a stone cooler, etc., should be able to ensure the continuous and normal operation of the process.

[0024] A distillation unit 9 is provided: the liquid air coming out of the liquid storage tank 3 is pressurized by the liquid air pump 8 and then enters the distillation unit 9 to produce liquid oxygen 10 and gaseous nitrogen for output.

[0025] A liquefaction unit 11 is provided: the gaseous nitrogen produced from the distillation unit 9 passes through the liquefaction unit 11 to produce liquid nitrogen 12.

[0026] The distillation unit 9 is designed, installed and operated with reference to the distillation tower of the air separation device.

[0027] The liquefaction unit 11 is implemented by a conventional compression refrigeration process or a low-temperature expansion machine process.

[0028] A vaporizer 23 is provided: one end of the vaporizer 23 is connected to the bottom liquid side of the high-pressure liquid storage tank 22 through a pipeline, and the other end is connected to the top gas side of the high-pressure liquid storage tank 22 through a pipeline; when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank 22 releases energy, the pressure in the high-pressure liquid storage tank 22 decreases, and the high-pressure and low-temperature liquid air in the vaporizer 23 is heated to be vaporized and enter the top gas space of the high-pressure liquid storage tank 22, thereby maintaining the pressure in the high-pressure liquid storage tank 22 stable.

[0029] The heater in the gasifier 23 is made of metal coils or finned tubes, etc. The heating medium is preferably turbine exhaust gas, etc. The heating medium should not contain water to avoid ice clogging of the heater due to improper operation.

[0030] A pressure regulating pump 24 is provided: when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank 22 releases energy, the pressure in the high-pressure liquid storage tank 22 decreases, and the output pressure is adjusted by the pressure regulating pump 24 to maintain the pressure of the high-pressure gas phase air 76 stable. The pressure regulating pump 24 adopts a variable frequency speed regulation operation mode to maintain the stability of the output pressure.

[0031] When the high-pressure and low-temperature liquid air in the high-pressure liquid storage tank 22 absorbs heat and its pressure increases, a gas release expansion cooling circuit is provided: the gaseous air discharged from the high-pressure liquid storage tank 22 is expanded and works by the release gas expander 33 to reduce the pressure and temperature, and enters the cooling unit 2 to recover the cold and then be discharged.

[0032] In the present application, the compression heat of the outlet gas of the compressor 7 or the air compressor 1 is recovered and utilized through a heat accumulator.

[0033] Equipment and its systems, pipelines, instruments, valves, cold preservation, bypass facilities with regulating functions, etc. not described in this application shall be matched with reference to or in accordance with mature technologies in well-known traditional processes.

[0034] The equipment and pipelines in this application adopt necessary heat recovery and cooling measures.

[0035] Parts not mentioned in this application, such as safety accessories, automatic control, etc., are equipped with existing publicly known technologies, that is, existing mature, reliable and reasonable technical measures are applied to this device.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] 1. Compared with the existing liquid air energy storage power station, it draws on the traditional steam turbine extraction heat supply and heat recovery cycle technology, adopts the high-pressure gas turbine extraction heat recovery / recooling liquefaction process, the cold energy recovery of liquid air is convenient, the process is simplified, and the by-product low-pressure liquid air can be used to store energy, produce liquid oxygen, liquid nitrogen or nitrogen, and can also be used for cooling. It is a new operating process and an economical process;

[0038] 2. Compared with the existing multi-stage compression and intermediate cooling compressor high-pressure gas transmission energy storage power station, the high-pressure gas supply technology of air isobaric liquefaction and hydraulic pump pressurization and cooling combined with full low-pressure oxygen production technology can effectively reduce the compression heat power consumption of the compressor and reduce the difficulty of heat recovery of the low-grade compression heat of the compressor. The comprehensive power consumption of high-pressure gas supply is greatly reduced and the noise is low. It is essentially a new energy-saving gas pressure / hydraulic combined high-pressure gas supply unit, of which the gas pressure / hydraulic combined high-pressure gas supply unit is suitable for the transformation and upgrading of the gas supply system of the existing liquid air energy storage power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a process flow diagram of a pumping and cooling type liquid air energy storage power station.

[0040] Figure 1 In: 1-compressor, 2-cooling unit, 3-low-pressure liquid storage tank, 4-hydraulic pump, 5-cryogenic expander, 6-brake, 7-compressor, 8-liquid air pump, 9-distillation unit, 10-liquid oxygen, 11-nitrogen liquefaction unit, 12-liquid nitrogen, 13-liquid air, 14-high-pressure pump, 17-regenerator, 18-gas turbine, 19-gas turbine generator, 20-regenerator, 21-gas turbine exhaust, 22-high-pressure liquid storage tank, 23-vaporizer, 24-pressure regulating pump, 32-high-pressure air, 33-release gas expander, 34-circulation pump, 35-exhaust of gas turbine 18, 36-heat exchanger, 37-regenerator, 38-liquid air. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] Embodiment 1:

[0043] like Figure 1 As shown, a pumping and cooling type liquid air energy storage power station, the implementation process of the power station is as follows:

[0044] The system adopts a supplementary cooling circulation loop, which refers to the liquid air coming out of the liquid storage tank 3, which is gasified by the hydraulic pump 4 and the cooling unit 2, and then discharged by the low-temperature expander 5 and the cooling unit 2, and then enters the compressor 1 or the compressor 7 for pressurization, and then liquefied by the cooling unit 2 and enters the liquid storage tank 3. The mechanical work generated by the low-temperature expander 5 drags the brake 6 to supplement the cooling of the liquefaction process of the compressed air;

[0045] When storing energy:

[0046] After being compressed by the compressor 1, the air enters the cooling unit 2 to be liquefied into liquid air, which is then sent to the liquid storage tank 3. The liquid air in the liquid storage tank 3 is then pressurized by the high-pressure pump 14 and enters the high-pressure liquid storage tank 22 for energy storage.

[0047] When releasing energy:

[0048] The high-pressure liquid air in the high-pressure liquid storage tank 22 is converted into gaseous high-pressure air 32 through the recooler 37. After the high-pressure air 32 is heated by the supplementary heat device 17, it enters the gas turbine 18 to expand and do work, driving the gas turbine generator 19 to generate electricity, and the gas turbine exhaust 21 is discharged; or the high-pressure liquid air in the high-pressure liquid storage tank 22 is converted into gaseous high-pressure air 32 through the recooler 37 and the heat exchanger 36, and then heated by the supplementary heat device 17, and enters the gas turbine 18 to expand and do work, driving the gas turbine generator 19 to generate electricity, and the outlet gas of the gas turbine 18 forms the gas turbine exhaust 21; the turbine exhaust 35 extracted from the gas turbine 18 is converted into liquid-phase air 38 through the recooler 37, and enters the liquid storage tank 3, thereby forming a gas turbine exhaust cooling circuit; or the turbine exhaust 35 extracted from the gas turbine 18 is converted into liquid-phase air 38 through the heat exchanger 36 and the recooler 37, and enters the liquid storage tank 2, thereby forming a gas turbine exhaust cooling circuit.

[0049] The reheater 17 of the gas turbine exhaust air return cooling circuit adopts a partition heat replenishment method, that is, the high-pressure and high-temperature air entering the gas turbine 18 through the reheater 17 is pure air.

[0050] The cooling unit 2 adopts a shell and tube, plate fin, microchannel or other type of cooling exchanger. Its structure and cooling elements are similar to the shell and tube heat exchanger, plate fin heat exchanger, microchannel or other type of heat exchanger in the traditional air separation process. Multiple cooling exchangers are combined together in series, parallel or series-parallel connection.

[0051] The heat source of the reheater 17 is one or more of the following thermal energies: compression heat generated by a compressor or an air compressor; industrial waste heat or waste heat; solar thermal energy; heat energy released by fuel combustion; geothermal energy; heat energy stored in a heat storage medium; the heat source of the reheater 17 is used to heat the high-pressure air 32.

[0052] The air compression and cooling process in the air extraction and cooling type liquid air energy storage power station also includes air purification and purification, which is used to remove solid matter and impurity gases in the air; the air purification and purification equipment is integrated in the compressor 1 and / or the compressor 7 and / or the cold exchange unit 2, or integrated in the connecting pipes of the compressor 1, the compressor 7, and the cold exchange unit 2.

[0053] The brake 6 of the cryogenic expander 5 includes but is not limited to a fan, a liquid pump, a compressor or an air compressor, and is used to recover the expansion work generated by the cryogenic expander 5 .

[0054] The air compressor 1 or compressor 7 is only used for distinction, and in essence they are both air compression and boosting equipment; the same applies to hydraulic pumps or liquid air pumps, and high-pressure pumps.

[0055] The compressed air in the air extraction and cooling type liquid air energy storage power station is an isobaric liquefaction process, which means that the raw air entering the cooling unit 2 does not need to be expanded, depressurized and refrigerated like the traditional air separation process. The air coming out of the compressor only has resistance losses of equipment and pipelines along the way, and can be regarded as an isobaric liquefaction process of air with little pressure change.

[0056] The air purification and reconditioning equipment in the air extraction and recooling type liquid air energy storage power station, wherein the purification equipment includes a molecular sieve purifier, a reversible cooler or a stone cooler, etc., should be able to ensure the continuous and normal operation of the process.

[0057] A distillation unit 9 is provided: the liquid air coming out of the liquid storage tank 3 is pressurized by the liquid air pump 8 and then enters the distillation unit 9 to produce liquid oxygen 10 and gaseous nitrogen for output.

[0058] A liquefaction unit 11 is provided: the gaseous nitrogen produced from the distillation unit 9 passes through the liquefaction unit 11 to produce liquid nitrogen 12.

[0059] The distillation unit 9 is designed, installed and operated with reference to the distillation tower of the air separation device.

[0060] The liquefaction unit 11 is implemented by a conventional compression refrigeration process or a low-temperature expansion machine process.

[0061] A vaporizer 23 is provided: one end of the vaporizer 23 is connected to the bottom liquid side of the high-pressure liquid storage tank 22 through a pipeline, and the other end is connected to the top gas side of the high-pressure liquid storage tank 22 through a pipeline; when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank 22 releases energy, the pressure in the high-pressure liquid storage tank 22 decreases, and the high-pressure and low-temperature liquid air in the vaporizer 23 is heated to be vaporized and enter the top gas space of the high-pressure liquid storage tank 22, thereby maintaining the pressure in the high-pressure liquid storage tank 22 stable.

[0062] The heater in the gasifier 23 is made of metal coils or finned tubes, etc. The heating medium is preferably turbine exhaust gas, etc. The heating medium should not contain water to avoid ice clogging of the heater due to improper operation.

[0063] A pressure regulating pump 24 is provided: when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank 22 releases energy, the pressure in the high-pressure liquid storage tank 22 decreases, and the output pressure is adjusted by the pressure regulating pump 24 to maintain the pressure of the high-pressure gas phase air 76 stable. The pressure regulating pump 24 adopts a variable frequency speed regulation operation mode to maintain the stability of the output pressure.

[0064] When the high-pressure and low-temperature liquid air in the high-pressure liquid storage tank 22 absorbs heat and its pressure increases, a gas release expansion cooling circuit is provided: the gaseous air discharged from the high-pressure liquid storage tank 22 is expanded and works by the release gas expander 33 to reduce the pressure and temperature, and enters the cooling unit 2 to recover the cold and then be discharged.

[0065] In the present application, the compression heat of the outlet gas of the compressor 7 or the air compressor 1 is recovered and utilized through a heat accumulator.

[0066] Parts not mentioned in the present invention, such as safety accessories, instruments, meters, automatic control, etc., are equipped with existing well-known technologies, and existing mature, reliable and reasonable technical measures can be applied to this device.

[0067] Although the present invention has been disclosed as above with preferred embodiments, they are not intended to limit the present invention. Anyone familiar with the art can make various changes or modifications without departing from the spirit and scope of the present invention, which also belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the definition of the claims of this application.

Claims

1. A pumping and cooling type liquid air energy storage power station, characterized in that: The supplementary cooling circuit refers to the liquid air coming out of the liquid storage tank (3), which is gasified by the hydraulic pump (4) and the cooling unit (2), and then enters the low-temperature expansion machine (5) to expand and do work to reduce the temperature. The exhaust gas of the low-temperature expansion machine (5) enters the cooling unit (2) to recover the cold and then is discharged. It is then pressurized by the compressor (1) or the compressor (7) and enters the cooling unit (2) to be liquefied and enters the liquid storage tank (3) for storage. The low-temperature expansion machine (5) drags the brake (6); or a part of the gaseous air or liquid air diverted from the cooling unit (2) passes through the cooling unit (2), the low-temperature expansion machine (5), and the cooling unit (2) and enters the compressor (1) and / or the compressor (7) to be pressurized, and then returns to the diversion point of a part of the gaseous air or liquid air diverted from the cooling unit (2), thereby forming a supplementary cooling circuit; When storing energy: After being compressed by the compressor (1), the air enters the cooling unit (2) to be liquefied to obtain liquid air, which is then sent to the liquid storage tank (3). The liquid air in the liquid storage tank (3) is then pressurized by the high-pressure pump (14) and enters the high-pressure liquid storage tank (22) to store energy. When releasing energy: The high-pressure liquid air in the high-pressure liquid storage tank (22) is heated by the recooler (37) to form gaseous high-pressure air (32). The high-pressure air (32) is heated by the reheater (17) and then enters the gas turbine (18) to expand and perform work, driving the gas turbine generator (19) to generate electricity, and the exhaust gas (21) of the gas turbine (18) is discharged; or the high-pressure liquid air in the high-pressure liquid storage tank (22) is heated by the recooler (37) and the heat exchanger (36), and then heated by the reheater (17) and then enters the gas turbine (18) to expand and perform work, driving the gas turbine generator (19) to generate electricity, and the outlet gas of the gas turbine (18) forms the gas turbine exhaust gas (21); The turbine exhaust air (35) extracted from the gas turbine (18) passes through the recooler (37) to form liquid-phase air (38), and enters the liquid storage tank (3), thereby forming a gas turbine exhaust air recooling liquefaction loop; or the turbine exhaust air (35) extracted from the gas turbine (18) passes through the heat exchanger (36) and the recooler (37) to form liquid-phase air (38), and enters the liquid storage tank (3), thereby forming a gas turbine exhaust air recooling liquefaction loop.

2. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: The air purification and purifying equipment in the air compression and cooling process in the novel cold power cycle and power generation system is integrated in the compressor (1) and / or the compressor (7) and / or the cold exchange unit (2), or integrated in the connecting pipes of the compressor (1), the compressor (7) and the cold exchange unit (2).

3. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: A vaporizer (23) is provided: one end of the vaporizer (23) is connected to the bottom liquid side of the high-pressure liquid storage tank (22) through a pipeline, and the other end is connected to the top gas side of the high-pressure liquid storage tank (22) through a pipeline; when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank (22) releases energy, the pressure in the high-pressure liquid storage tank (22) decreases, and the high-pressure and low-temperature liquid air in the vaporizer (23) is heated to vaporize and enter the top gas space of the high-pressure liquid storage tank (22), thereby maintaining the pressure in the high-pressure and low-temperature liquid storage tank (22) stable.

4. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: A pressure regulating pump (24) is provided: when the high-pressure and low-temperature liquid air stored in the high-pressure liquid storage tank (22) releases energy, the pressure in the high-pressure liquid storage tank (22) decreases, and the output pressure is adjusted by the pressure regulating pump (24) to maintain the pressure of the high-pressure gas phase air stable. The pressure regulating pump (24) adopts a variable frequency speed regulation operation mode to maintain the stability of the output pressure.

5. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: When the high-pressure and low-temperature liquid air in the high-pressure liquid storage tank (22) absorbs heat and its pressure increases, the gaseous air discharged from the high-pressure liquid storage tank (22) is expanded by the release gas expansion machine (33) to perform work, driving the circulation pump (34) to pressurize the liquid air, and then enters the cooling unit (2) to release the cold energy before being discharged.

6. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: A distillation unit (9) is provided: liquid air from the liquid storage tank (3) is pressurized by a liquid air pump (8) and then enters the distillation unit (9) to produce liquid oxygen (10) and gaseous nitrogen for output.

7. The air extraction and cooling type liquid air energy storage power station according to claim 6 is characterized in that: A liquefaction unit (11) is provided: the gaseous nitrogen produced by the distillation unit (9) is passed through the liquefaction unit (11) to produce liquid nitrogen (12).

8. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: The brake (6) comprises a fan, a liquid pump, a compressor or an air compressor.

9. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: The heat source of the reheater (17) is one or more of the following thermal energies: compression heat generated by a compressor or an air compressor; industrial waste heat or waste heat; solar thermal energy; thermal energy released by fuel combustion; geothermal energy; and thermal energy stored in a heat storage medium.

10. The air extraction and cooling type liquid air energy storage power station according to claim 1 is characterized in that: The cooling unit (2) adopts a shell and tube type, plate fin type, or microchannel type cooler.

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