A supplementary combustion compressed air energy release system, energy storage system and method

Abstract

An embodiment of the present application proposes a supplementary combustion compressed air energy release system, an energy storage system and a method. By optimizing the energy release process of the compressed air energy storage system, the temperature at the inlet of each stage of the air turbine is automatically adjusted to ensure the balance of the inlet temperatures of each stage of the air turbine, so as to achieve the purpose of increasing the power generation. In addition, through the coupling of the ammonia water circulation power generation subsystem, the waste heat and moisture in the air discharged by the turbine are recycled, comprehensively improving the problems of large heat energy loss and large cooling water loss in the supplementary combustion gas-water mixed energy release system.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly to a combustion-supplemented compressed air energy release system, an energy storage system, and a method. Background Art

[0002] With the large-scale utilization of new energy, energy storage has become an indispensable part of the global energy transformation process. Especially in scenarios such as large-scale new energy bases, large-scale, long-duration, high-efficiency, and low-cost energy storage technologies are more needed. Among many energy storage technologies, compressed air energy storage systems are generally considered to be one of the most competitive large-scale power energy storage technology routes. In related technologies, it is proposed that a compressed air energy storage system includes an air compression unit, an air storage chamber for storing compressed air, and a compressed air work unit. Among them, in order to improve the power generation power during the energy release stage of the compressed air energy storage system, a combustion-supplemented energy release method is adopted in related technologies. However, there are problems such as large cold-end heat energy loss, large temperature deviation at the inlets of each stage of the turbine in the combustion-supplemented compressed air energy storage energy release process, and large loss of compressed heat cooling water. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems in related technologies to some extent.

[0004] To this end, the purpose of this application is to propose a combustion-supplemented compressed air energy release system, an energy storage system, and a method. By optimizing the energy release process of the compressed air energy storage system, the temperature at the inlets of each stage of the turbine during air expansion is automatically adjusted to ensure the balance of the temperatures at the inlets of each stage of the turbine, so as to achieve the purpose of increasing the power generation power. In addition, through the coupling of the ammonia water cycle power generation subsystem, the waste heat and moisture in the air discharged from the turbine are recovered and utilized, comprehensively improving the problems of large heat energy loss and large loss of compressed heat cooling water in the combustion-supplemented gas-water mixed energy release system.

[0005] To achieve the above object, a combustion-supplemented compressed air energy release system proposed according to the first aspect of this application includes:

[0006] An air storage chamber, which stores high-pressure air therein;

[0007] A turbine power generation unit, which includes a multi-stage combined turbine device and a combustion-supplement device. The output end of the gas passage in the combustion-supplement device and the output end of the air storage chamber are respectively connected to a combustion chamber; the output end of the combustion chamber is connected to the input end of the turbine device; a ejector is provided at the input end of the turbine device, and gas and high-pressure air pre-burn in the combustion chamber to generate a mixed gas and then enter the turbine device to do work; the input end of the ejector is connected to a heat regulation component so that the temperature of the mixed gas output from each ejector is the same.

[0008] In some embodiments, the thermal regulation component includes a hot water tank for storing hot water, a plurality of regulating valves and a temperature monitor arranged on the hot water passage; the regulating valves correspond to the ejectors one by one; the temperature monitor is arranged at the output end of the ejector and is electrically connected to the regulating valves.

[0009] In some embodiments, it further includes a waste heat recovery unit; which includes an ammonia-water cycle power generation subsystem; wherein the ammonia-water cycle power generation subsystem is heat-exchange connected to the exhaust gas output by the turbine device.

[0010] In some embodiments, the ammonia-water cycle power generation subsystem includes a steam generator, a separator, an ammonia expander and an absorber arranged on the ammonia-water circulation loop; wherein the gas output end of the separator is connected to the ammonia expander; the liquid output end of the separator communicates with the absorber.

[0011] In some embodiments, a multi-stage heat exchange device is further arranged on the ammonia-water circulation loop, including a superheater and a preheater; wherein the exhaust gas output by the turbine device exchanges heat with the ammonia gas separated by the separator in the superheater; the concentrated ammonia solution synthesized in the absorber is introduced into the preheater for heat exchange with the dilute ammonia liquid separated by the separator.

[0012] In some embodiments, a condenser is further arranged on the ammonia-water circulation loop; wherein the concentrated ammonia solution output from the absorber exchanges heat and cools down in the condenser and then is introduced into the preheater.

[0013] In some embodiments, it further includes a drain separator; wherein the exhaust gas output by the turbine device enters the drain separator after heat exchange with the ammonia-water cycle power generation subsystem, for separating liquid and gas.

[0014] A compressed air energy storage system according to the second aspect of the present application includes the energy release system in any of the above embodiments; it further includes an air compression unit; wherein the output end of the air compression unit is connected to the air storage chamber, and it is used to compress air step by step and generate high-pressure air; the high-pressure air exchanges heat with a cold water medium through a multi-stage heat exchanger.

[0015] In some embodiments, the cold-side output ends of the multi-stage heat exchangers are all connected to the thermal regulation component.

[0016] In some embodiments, the cold water medium is introduced into the ammonia-water cycle power generation subsystem and exchanges heat with the concentrated ammonia solution therein.

[0017] A method for operating a compressed air energy storage system according to the third aspect of the present application, operating the compressed air energy storage system in any of the above embodiments, includes the following steps:

[0018] Energy storage stage: The air compression unit compresses air to generate high-pressure air, which is transported to the air storage chamber after heat exchange with the cold water medium; the cold water medium is heated and becomes hot water, which is stored in the hot water tank.

[0019] Energy release stage: The air storage chamber outputs high-pressure air, which pre-burns with fuel gas to generate a mixed gas and is introduced into the ejector at the input end of the turbine device; at the same time, hot water from the hot water tank is input into the ejector, and the flow rate of the hot water is adjusted according to the temperature monitor; the mixed gas does work in the turbine device and outputs exhaust gas; the exhaust gas undergoes heat exchange with the concentrated ammonia solution circulating in the ammonia water circulation power generation subsystem and then enters the hydrophobic separator for gas-liquid separation.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0021] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0022] Figure 1 is a schematic structural diagram of a supplementary combustion compressed air energy release system proposed in an embodiment of the present application;

[0023] Figure 2 is a schematic structural diagram of a supplementary combustion compressed air energy release system proposed in an embodiment of the present application;

[0024] Figure 3 is a schematic structural diagram of an ammonia water circulation power generation subsystem proposed in an embodiment of the present application;

[0025] Figure 4 is a schematic structural diagram of an ammonia water circulation power generation subsystem proposed in an embodiment of the present application;

[0026] Figure 5 is a schematic structural diagram of an ammonia water circulation power generation subsystem proposed in an embodiment of the present application;

[0027] Figure 6 is a schematic structural diagram of a compressed air energy storage system proposed in an embodiment of the present application;

[0028] Figure 7 is a schematic structural diagram of a compressed air energy storage system proposed in an embodiment of the present application;

[0029] Figure 8 is a schematic structural diagram of a compressed air energy storage system proposed in an embodiment of the present application;

[0030] Figure 9 is a flowchart of the operation method of a compressed air energy storage system proposed in an embodiment of the present application;

[0031] In the figure, 1 is the air compression unit; 11 is the first compressor; 12 is the second compressor; 13 is the third compressor;

[0032] 2 is the turbine power generation unit; 21 is the first turbine; 22 is the second turbine; 23 is the third turbine; 24 is the generator;

[0033] 251 is the gas path; 252 is the injector; 253 is the combustion chamber; 261 is the hot water tank; 262 is the hot water path; 263 is the water pump; 264 is the regulating valve; 265 is the temperature monitor; 266 is the preheater; 267 is the water-vapor heat exchanger; 268 is the electric valve;

[0034] 3 is the gas storage chamber;

[0035] 4 is the ammonia-water cycle power generation subsystem; 41 is the steam generator; 42 is the separator; 43 is the ammonia expander; 44 is the absorber; 45 is the superheater; 46 is the preheater; 47 is the condenser; 48 is the drain separator; 49 is the solution pump. Detailed implementation manners

[0036] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0037] Refer to Figure 1 This is a supplementary combustion compressed air energy release system proposed in an embodiment of the present application, including a gas storage chamber 3 and a turbine power generation unit 2; wherein the gas storage chamber 3 is used to store high-pressure air, and its gas output end is connected to the turbine power generation unit 2.

[0038] For example, the turbine power generation unit 2 includes a multi-stage combined turbine device and a supplementary combustion device; wherein the multi-stage turbine device is connected in series through an energy release pipeline, and the high-pressure air stored in the gas storage chamber 3 is gradually released in the turbine device to generate electricity and do work; wherein the multi-stage combined turbine device includes a turbine and a generator 24; it can be understood that multiple turbines are connected in series through an energy release pipeline, that is, high-pressure air enters multiple turbines in sequence through the energy release pipeline to do work, and the turbines rotate to drive the generator 24 to do work and generate electricity. This is a conventional setting in this field and will not be elaborated here.

[0039] However, what is special about this embodiment is that the turbine power generation unit 2 further includes a supplementary combustion device. The supplementary combustion device includes a gas passage 251 through which gas can be introduced. The output end of the gas passage 251 in the supplementary combustion device and the output end of the gas storage chamber 3 are respectively connected to the combustion chamber 253. The output end of the combustion chamber 253 is connected to the input end of the turbine device. That is, the gas passage 251 can introduce gas into the combustion chamber 253 and pre-combine it with the high-pressure air simultaneously introduced into the combustion chamber 253 to generate a high-temperature mixed gas. The high-temperature mixed gas enters multiple turbines to do work. In this embodiment, an injector 252 is provided at the gas input end of the turbine to connect the output end of the combustion chamber 253 to the input end of the injector 252, so as to allow the high-temperature mixed gas to enter the turbine to do work to improve the work efficiency. To solve the technical problem of large temperature deviation of the mixed gas at the inlet of each stage of the turbine, in this embodiment, a heat regulation component is connected to the input end of each injector 252 to regulate the temperature of the mixed gas at the inlet of each turbine, so as to balance the work efficiency and work output of each turbine.

[0040] For example Figure 1 - Figure 2 As shown, the multi-stage combined turbine device includes a three-stage combined turbine and a generator 24. The three-stage combined turbine includes a first turbine 21, a second turbine 22, and a third turbine 23 respectively. The first turbine 21, the second turbine 22, and the third turbine 23 are all connected by energy release pipelines. That is, the high-pressure air entering the first turbine 21 does work and then enters the second turbine 22 to do further work. The high-pressure air output from the second turbine 22 enters the third turbine 23 to do work again. The rotation of the turbine drives the generator 24 to do work and generate electricity, realizing the energy release and power generation of high-pressure air. An injector 252 is provided at the input end of each of the first turbine 21, the second turbine 22, and the third turbine 23. Taking the gas in this embodiment as natural gas as an example, natural gas is sequentially input into each combustion chamber 253 connected to the first turbine 21, the second turbine 22, and the third turbine 23 through the gas passage 251. The high-pressure air output from the gas storage chamber 3 is mixed with natural gas and burned in the combustion chamber 253 to generate a high-temperature mixed gas. The high-temperature mixed gas enters the injector 252 at the input end of the first turbine 21, enters the first turbine 21 to do turbine work after the temperature is regulated by the heat regulation component, and drives the generator 24 to generate electricity. After the exhaust gas output from the first turbine 21 is mixed and burned with natural gas in the combustion chamber 253 at the input end of the second turbine 22, it enters the injector 252 at the input end of the second turbine 22, and enters the second turbine 22 to do turbine work after the temperature is regulated according to the above process. And so on, which will not be elaborated here.

[0041] In the supplementary combustion gas-water mixing energy release system of this embodiment, by optimizing the energy release process of high-pressure air, the temperature at the inlet of each stage of the turbine during air passage is automatically adjusted to ensure the balance of the inlet temperatures of each stage of the turbine, thereby achieving the purpose of increasing the power generation. In addition, the high-pressure air does work through multiple stages of turbines and drives the generator 24 to generate electricity. The expansion ratio of each stage of the turbine is the same, which is convenient for batch management and adjustment of the parameters in the energy release process of the energy release system.

[0042] In some embodiments, the heat regulation component includes a hot water tank 261 for storing hot water, a plurality of regulating valves 264 and a temperature monitor 265 arranged on the hot water passage 262; the regulating valves 264 correspond to the ejectors 252 one by one; the temperature monitor 265 is arranged at the output end of the ejector 252 and is electrically connected to the regulating valve 264.

[0043] The heat regulation component includes a hot water tank 261, a regulating valve 264 and a temperature monitor 265 connected by a hot water passage 262; the hot water tank 261 stores hot water at a certain temperature, and the hot water is transported through the hot water passage 262 provided with the regulating valve 264 and the temperature monitor 265 into the ejector 252 at the input end of each turbine device to adjust the temperature and humidity of the mixed gas generated by the combustion of high-pressure air and gas in the ejector 252. In this embodiment, the regulating valves 264 correspond to the ejectors 252 one by one and are used in pairs, that is, a regulating valve 264 is arranged at the input end of the ejector 252 to control the flow rate of hot water entering the ejector 252. The adjustment of the flow rate of hot water entering the ejector 252 is determined according to the temperature monitor 265 arranged at the output end of the ejector 252, that is, when the temperature of the mixed gas output by the ejector 252 is relatively high, the regulating valve 264 adjusts the flow rate of hot water entering the ejector 252 according to the corresponding temperature monitor 265, so as to balance the temperature of the mixed gas at the inlet and outlet of each stage of the turbine, so that the expansion ratio of each stage of the turbine is the same.

[0044] For example Figure 1 As shown, in this embodiment, the multi-stage combined turbine device includes a three-stage combined turbine and a generator 24. The three-stage combined turbine is the first turbine 21, the second turbine 22 and the third turbine 23 respectively; and the gas is natural gas. The high-pressure air output from the gas storage chamber 3 and natural gas enter the ejector 252 at the input end of the first turbine 21 after combustion. At this time, the hot water in the hot water tank 261 enters the ejector 252 through the regulating valve 264. After adjusting the hot water flow rate through the heat of the mixed gas output by the ejector 252, the mixed gas at the reached temperature enters the first turbine 21 to do turbine work and drive the generator 24 to generate electricity; after the exhaust gas output by the first turbine 21 and natural gas are burned, they enter the ejector 252 at the input end of the second turbine 22 again to adjust the temperature of the mixed gas with hot water and then enter the second turbine 22 to do turbine work, and so on without further elaboration.

[0045] In some embodiments, a water pump 263 is provided at the output end of the hot water tank 261. As Figure 2 shown in this embodiment, during the process of releasing high-pressure air from the gas storage chamber 3, the high-pressure air is pre-mixed and burned with natural gas to increase the inlet temperature of each stage of the turbine. To ensure that the inlet temperatures of each stage of the turbine are not very different and to prevent the inlet temperature from being too high, the hot water in the hot water tank 261 is pressurized to 10 MPa by the water pump 263, and then the pressurized hot water enters each stage of the turbine together with the mixed gas through the ejector 252. The injection amount of the hot water is automatically controlled and adjusted by the regulating valve 264 according to the temperature measurement value of the temperature monitor 265, so as to achieve a relatively high combined power output.

[0046] After the energy release of the supplementary combustion compressed air energy release system, the exhaust gas output by the turbine device still has a relatively high temperature, and the heat and moisture of this exhaust gas are not fully utilized in the related art. In some embodiments, the exhaust gas output by the turbine device can be used to preheat the gas input into the turbine through a heat exchange device. As Figure 2 shown in the figure, the heat exchange device can be a preheater 266, where the exhaust gas output by the turbine device and the gas exchange heat in the preheater 266, and the heated gas is introduced into each stage of the turbine; while the exhaust gas after heat exchange can continue to recover heat.

[0047] In some embodiments, the supplementary combustion compressed air energy release system further includes a waste heat recovery unit; which includes an ammonia-water cycle power generation subsystem 4; wherein the ammonia-water cycle power generation subsystem 4 is heat exchange-connected to the exhaust gas output by the turbine device.

[0048] In this embodiment, through the coupling of the ammonia-water cycle power generation subsystem 4, the waste heat and moisture in the air discharged from the turbine are recovered and utilized, comprehensively improving the problems of large heat energy loss and large loss of cooling water for heat shrinkage in the supplementary combustion gas-water mixed energy release system, achieving high-efficiency utilization of heat, and achieving the purpose of energy-saving operation of the supplementary combustion compressed air energy release system.

[0049] In some embodiments, the ammonia-water cycle power generation subsystem 4 includes a steam generator 41, a separator 42, an ammonia gas expander 43, and an absorber 44 provided on the ammonia-water circulation loop; wherein the gas output end of the separator 42 is connected to the ammonia gas expander 43; the liquid output end of the separator 42 is communicated with the absorber 44.

[0050] As Figure 3As shown, the ammonia water circulation power generation system 4 includes an ammonia water circulation loop in which ammonia solution is circulated, which includes a steam generator 41, a separator 42, an ammonia gas expander 43 and an absorber 44. A solution pump 49 is provided on the ammonia water circulation loop. The output end of the steam generator 41 is connected to the separator 42. The gas output end of the separator 42 is connected to the ammonia gas expander 43, and its liquid output end is connected to the absorber 44. The gas output by the ammonia gas expander 43 and the liquid separated by the separator 42 are mixed in the absorber 44 to form concentrated ammonia, and then enter the steam generator 41 for circulation. In this embodiment, the concentrated ammonia solution and the exhaust gas exchange heat in the steam generator 41 to precipitate ammonia gas. The dilute ammonia solution and ammonia gas are separated in the separator 42. The ammonia gas enters the ammonia gas expander 43 to expand and do work. The dilute ammonia solution and the ammonia gas at the outlet of the ammonia gas expander 43 enter the absorber 44 to be mixed and reform into concentrated ammonia solution, which then flows back into the steam generator 41 again.

[0051] Among them, as Figure 4 , a multi-stage heat exchange device including a superheater 45 and a preheater 46 is also provided on the ammonia water circulation loop; the exhaust gas and the ammonia gas separated by the separator 42 first exchange heat in the superheater 45. After passing through the superheater 45, the ammonia gas further increases in temperature to ensure the expansion power generation rate of the ammonia gas. The concentrated ammonia solution synthesized in the absorber 44 is introduced into the preheater 46 to exchange heat with the dilute ammonia liquid separated by the separator 42 to increase the temperature of the concentrated ammonia solution, so as to facilitate the separation of ammonia gas in the concentrated ammonia solution in the steam generator 41. The concentrated ammonia solution output by the preheater 46 enters the steam generator 41 to exchange heat with the exhaust gas after heat exchange output by the superheater 45. In this embodiment, after the exhaust gas output by the turbine device exchanges heat with the fuel gas, it exchanges heat with the ammonia solution circulating in the ammonia water circulation power generation system 4, so as to achieve the effect of cascaded recovery of exhaust gas heat.

[0052] In some embodiments, a condenser 47 is also provided on the ammonia water circulation loop; the concentrated ammonia solution output from the absorber 44 exchanges heat and cools down in the condenser 47 and then is introduced into the preheater 46.

[0053] Among them, as Figure 5 , the dilute ammonia solution and the ammonia gas at the outlet of the ammonia gas expander 43 enter the absorber 44 to be mixed and reform into concentrated ammonia solution; in order to ensure that there is no gas in the concentrated ammonia solution, a condenser 47 can be used which is also provided on the ammonia water circulation loop. The concentrated ammonia solution output from the absorber 44 exchanges heat in the condenser 47 using a cold water medium to prevent cavitation of the solution pump 49 on the ammonia water circulation loop. The concentrated ammonia solution output by the condenser 47 is pressurized by the solution pump 49 and then undergoes the next ammonia water power cycle, continuously absorbing the waste heat of the air. After the exhaust gas of the turbine passes through the ammonia water circulation power generation system 4, the water vapor carried by it is basically liquefied.

[0054] In some embodiments, the afterburning compressed air energy release system further includes a steam trap 48; the exhaust gas output by the turbine device enters the steam trap 48 after heat exchange with the ammonia water cycle power generation subsystem 4, and is used to separate liquid and gas.

[0055] Among them, the afterburning compressed air energy release system further includes a steam trap 48. After heat exchange with the exhaust gas of the steam generator 41, it enters the steam trap 48. The exhaust gas separates air and water in the steam trap 48, thereby separating the moisture in the turbine. The separated aqueous solution can enter the hot water tank 261 after being heated. This embodiment further processes the exhaust gas, separates air and the aqueous solution, and reuses the aqueous solution, comprehensively improving the problem of large heat loss of the cooling water in the afterburning gas-water mixed energy release system.

[0056] In some embodiments, the present application proposes a compressed air energy storage system as Figure 6 shown, including the energy release system in any of the above embodiments; it further includes an air compression unit 1; the output end of the air compression unit 1 is connected to the gas storage chamber 3, and it is used to compress air step by step and generate high-pressure air; the high-pressure air exchanges heat with the cold water medium through a multi-stage heat exchanger.

[0057] It can be understood that the air compression unit 1 includes a multi-stage combined air compressor, that is, multiple air compressors are connected in series through the energy storage pipeline, and air can be compressed step by step in sequence to generate high-pressure air. The high-pressure air is transported to the gas storage chamber 3 through the energy storage pipeline for storage. This is a conventional setting in the art and will not be elaborated here.

[0058] Among them, the high-pressure air carries a large amount of heat, and the heat of the high-pressure air can be recovered by using a multi-stage heat exchanger. The multi-stage heat exchanger can be multiple water-vapor heat exchangers 267. For example, cold water medium and high-pressure air are introduced into the multi-stage heat exchanger for heat exchange, and the low-temperature high-pressure air enters the gas storage chamber 3. Exemplarily, as Figure 7 shown, the multi-stage combined air compressor includes a three-stage combined air compressor, which are the first compressor 11, the second compressor 12, and the third compressor 13 respectively; the first compressor 11, the second compressor 12, and the third compressor 13 are all connected through the energy storage pipeline. That is, the air entering the first compressor 11 is compressed to generate compressed air, and after heat exchange through a heat exchanger, it enters the second compressor 12. After further compression to generate compressed air with a higher pressure, it is heat-exchanged through a heat exchanger again and then transported to the third compressor 13, where it is further compressed to generate high-pressure air with a higher pressure and input into the gas storage chamber 3.

[0059] In some embodiments, the cold-side output ends of the multi-stage heat exchanger are all connected to the heat regulation assembly. That is, after the cold water medium exchanges heat with the high-pressure air in the multi-stage heat exchanger, the heated cold water medium is stored in the hot water tank 261, thereby ensuring the low-energy consumption operation of the compressed air energy storage system and increasing the operation economy.

[0060] As Figure 7 and Figure 8 shown, the air of the first compressor 11 is compressed to generate compressed air, and after exchanging heat with the cold water medium introduced therein through a heat exchanger, it enters the second compressor 12. The cold water medium after heat exchange is introduced into the hot water tank 261; after the compressed air after heat exchange is further compressed to generate compressed air with a higher pressure, it passes through a heat exchanger again and exchanges heat with the cold water medium introduced therein, and then is sent to the third compressor 13. The cold water medium after heat exchange is introduced into the hot water tank 261. By analogy, it will not be elaborated here.

[0061] In some embodiments, the cold water medium is introduced into the ammonia water circulation power generation subsystem 4 and exchanges heat with the concentrated ammonia solution therein. For example Figure 8 shown, the cold water medium can enter the condenser 47 through the electric valve 268 on its pipeline and exchange heat with the concentrated ammonia solution in the condenser 47. The cold water medium after heat exchange is introduced into the hot water tank 261. This embodiment realizes the highly centralized compressed air energy storage system, and recovers and utilizes the heat generated during its operation to the extreme, realizing the low-energy consumption operation of the compressed air energy storage system.

[0062] In some embodiments, according to the third object of the present application, a method for operating a compressed air energy storage system is also proposed. Operating the compressed air energy storage system in any of the above embodiments includes the following steps. For example Figure 9 shown:

[0063] S1 Energy storage stage: The air compression unit 1 compresses air to generate high-pressure air. The high-pressure air exchanges heat with the cold water medium and is then sent to the gas storage chamber 3; the cold water medium is heated and becomes hot water and is stored in the hot water tank 261;

[0064] S2 Energy release stage: The gas storage chamber 3 outputs high-pressure air, which pre-burns with fuel gas to generate a mixture and is introduced into the ejector 252 at the input end of the turbine device; at the same time, hot water in the hot water tank 261 is input into the ejector 252, and the flow rate of the hot water is adjusted according to the temperature monitor 265; the mixture does work in the turbine device and outputs exhaust gas; the exhaust gas exchanges heat with the concentrated ammonia solution circulating in the ammonia water circulation power generation subsystem 4 and then enters the hydrophobic separator 48 for gas-liquid separation.

[0065] Exemplarily, in the energy storage stage of this embodiment, the air compressor is gradually started by using the grid valley electricity or new energy power. The air is compressed by the first compressor 11 to generate high-pressure air, and then enters the second compressor 12 after heat exchange with the cold water medium introduced into a heat exchanger. The cold water medium after heat exchange is introduced into the hot water tank 261; after the compressed air after heat exchange is further compressed to generate high-pressure air with a higher pressure, it passes through a heat exchanger again and exchanges heat with the cold water medium introduced therein, and then is transported to the third compressor 13. The cold water medium after heat exchange is introduced into the hot water tank 261; until the high-pressure air is stored in the gas storage chamber 3 and the hot water tank 261 is filled with hot water.

[0066] In the energy release stage of this embodiment, the high-pressure air output from the gas storage chamber and natural gas burn in the combustion chamber 253 to generate a high-temperature mixed gas, and then enter the ejector 252 at the input end of the first turbine 21. At this time, the hot water in the hot water tank 261 is pressurized to 10 MPa by the water pump 263 and enters the ejector 252 through the regulating valve 264. After adjusting the hot water flow by the heat of the mixed gas output from the ejector 252, the mixed gas at the reached temperature enters the first turbine 21 to perform turbine work and drive the generator 24 to generate electricity; after the exhaust gas output from the first turbine 21 burns with natural gas, it enters the ejector 252 at the input end of the second turbine 22 again to adjust the temperature of the mixed gas by inputting hot water, and then enters the second turbine 22 to perform turbine work until the third turbine 23 completes the work and outputs the exhaust gas.

[0067] The exhaust gas and the ammonia gas separated by the separator 42 first exchange heat with the fuel gas in a pre-heater 46, then enter the superheater 45 to exchange heat with the ammonia gas separated by the separator 42, and finally enter the steam generator 41 to exchange heat with the concentrated ammonia solution and then be discharged to the drain separator 48, and gas-liquid separation is carried out in the drain separator 48. The ammonia gas separated by the separator 42 exchanges heat and then enters the ammonia expander 43 to do work. The exhaust gas of the ammonia expander 43 is transported to the absorber 44 and mixed with the heat-exchanged dilute ammonia solution to generate a concentrated ammonia solution. That is, the dilute ammonia solution and the ammonia gas at the outlet of the ammonia expander 43 enter the absorber 44 and are mixed to re-form a concentrated ammonia solution; the concentrated ammonia solution is introduced into the condenser 47 for condensation. The concentrated ammonia solution output by the condenser 47 is pressurized by the solution pump 49 and exchanges heat with the dilute ammonia solution separated by the separator 42 in the pre-heater 46, and then is introduced into the steam generator 41.

[0068] It should be noted that in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0069] Any process or method description depicted in the flowchart or described otherwise herein may be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where functions may be executed in a substantially simultaneous manner or in an order opposite to that shown or discussed, according to the functions involved, which should be understood by those skilled in the technical field to which the embodiments of the present application pertain.

[0070] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A supplementary combustion compressed air energy release system, characterized in that Comprising: A gas storage chamber, in which high-pressure air is stored; A turbine power generation unit, which includes a multi-stage combined turbine device and a supplementary combustion device arranged in pairs. The output end of the gas passage in the supplementary combustion device and the output end of the gas storage chamber are respectively connected to a combustion chamber; the output end of the combustion chamber is connected to the input end of the turbine device; the mixed gas generated by the combustion of the fuel and high-pressure air input into the first-stage supplementary combustion device is introduced into the first-stage turbine device to do work; the exhaust gas after the first-stage turbine device does work enters the next-stage supplementary combustion device and burns with the introduced fuel to generate a mixed gas, which enters the next-stage turbine device to do work; An ejector is provided at the input end of the turbine device. The gas and high-pressure air pre-burn in the combustion chamber to generate a mixed gas and then enter the turbine device to do work; the input end of the ejector is connected to a heat regulation component to make the temperature of the mixed gas output from each ejector the same; the heat regulation component includes a hot water tank for storing hot water, a plurality of regulating valves and a temperature monitor arranged on the hot water passage; the regulating valves correspond to the ejectors one by one; the temperature monitor is arranged at the output end of the ejector and is electrically connected to the regulating valve; and A waste heat recovery unit; it includes an ammonia-water cycle power generation subsystem; the ammonia-water cycle power generation subsystem is heat exchange-connected to the exhaust gas output from the last-stage turbine device; The ammonia-water cycle power generation subsystem includes a steam generator, a separator, an ammonia expander and an absorber arranged on the ammonia-water circulation loop; the gas output end of the separator is connected to the ammonia expander; the liquid output end of the separator is communicated with the absorber; a multi-stage heat exchange device is also arranged on the ammonia-water circulation loop, including a superheater and a preheater; the exhaust gas output from the turbine device exchanges heat with the ammonia gas separated by the separator in the superheater; the concentrated ammonia solution synthesized in the absorber is introduced into the preheater to exchange heat with the dilute ammonia liquid separated by the separator.

2. The energy release system according to claim 1, characterized in that A condenser is also arranged on the ammonia-water circulation loop; the concentrated ammonia solution output from the absorber exchanges heat and cools down in the condenser and then is introduced into the preheater.

3. The energy release system according to claim 1 or 2, characterized in that, It also includes a drain separator; the exhaust gas output from the turbine device exchanges heat with the ammonia-water cycle power generation subsystem and then enters the drain separator for separating liquid and gas.

4. A compressed air energy storage system, characterized in that, Comprising the energy release system according to any one of claims 1-3; it also includes an air compression unit; the output end of the air compression unit is connected to the gas storage chamber, which is used to compress air step by step and generate high-pressure air; the high-pressure air exchanges heat with a cold water medium through a multi-stage heat exchanger.

5. The compressed air energy storage system according to claim 4, characterized in that The cold-side output ends of the multi-stage heat exchangers are all connected to the heat regulation component.

6. The compressed air energy storage system according to claim 4, characterized in that, The cold water medium is introduced into the ammonia-water cycle power generation subsystem and exchanges heat with the concentrated ammonia solution therein.

7. A method for operating a compressed air energy storage system, characterized in that, Operating the compressed air energy storage system according to any one of claims 4-6 includes the following steps: Energy storage stage: The air compression unit compresses air to generate high-pressure air, and the high-pressure air exchanges heat with the cold water medium and then is transported to the gas storage chamber; the cold water medium is heated and becomes hot water and is stored in the hot water tank; Energy release stage: The gas storage chamber outputs high-pressure air, which reacts with the fuel gas to generate a mixed gas and is introduced into the injector at the input end of the turbine device; at the same time, hot water from the hot water tank is input into the injector and the flow rate of the hot water is adjusted according to the temperature monitor; the mixed gas does work in the turbine device and outputs exhaust gas; the exhaust gas undergoes heat exchange with the concentrated ammonia solution circulating in the ammonia-water cycle power generation subsystem and then enters the hydrophobic separator for gas-liquid separation.

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