Gas power generation device integrated with liquefied air energy storage

Abstract

The invention relates to the technical field of air energy storage power generation, discloses a gas power generation device integrated with liquefied air energy storage, and aims to improve the utilization efficiency of liquid fuel in the gasification combustion process. In the gas power generation device, a gas supply device is used for providing liquid fuel for a gasification heat exchanger, and the liquid fuel absorbs heat in the gasification heat exchanger to be gasified and is combusted through a gas power generation unit to generate power. An air compressor of the air energy storage system is used for compressing air, and the compressed air releases heat in the process of flowing through the cold box equipment and exchanges heat with the gasification heat exchanger. The liquid air storage tank is used for storing the liquid compressed air flowing out of the cold box device, and the expansion generator is used for generating electricity through the liquid compressed air. A high-grade cold source in a liquid fuel gasification process is introduced in a compressed air liquefaction stage for cooling, so that the volume of a heat exchanger and an adiabatic compressor in an air liquefaction process is reduced, and the air liquefaction speed and the liquefaction degree proportion are improved.

Description

Technical Field

[0001] The present application relates to the technical field of air energy storage power generation, and in particular to a gas-fired power generation device integrated with liquefied air energy storage. Background Art

[0002] Gas-fired power generation systems operating on ships, offshore platforms, or islands require fuel gas storage via gas supply systems. While the vaporized liquid fuel mixes with air and burns during the operation of gas turbines and other power generation equipment, this can drive continuous operation and generate electricity. However, the high-quality cooling energy released during the vaporization process is wasted. Summary of the Invention

[0003] The purpose of this application is to provide a gas-fired power generation device integrated with liquefied air energy storage, aiming to improve the utilization efficiency of liquid fuel during the gasification and combustion process.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] Some embodiments of the present application provide a gas-fired power generation device integrated with liquefied air energy storage, including a gas-fired power generation system and an air energy storage system. The gas-fired power generation system includes a gas-fired generator set, an air supply device, and a gasification heat exchanger. The air supply device is used to provide liquid fuel to the gasification heat exchanger, and the liquid fuel absorbs heat and vaporizes in the gasification heat exchanger and is burned by the gas-fired generator set to generate electricity. The air energy storage system includes an air compressor, a cold box device, a liquid air storage tank, and an expansion generator. The air compressor is used to compress air, and the compressed air releases heat and exchanges heat with the gasification heat exchanger while flowing through the cold box device. The liquid air storage tank is used to store liquid compressed air flowing out of the cold box device, and the expansion generator is used to generate electricity using liquid compressed air.

[0006] In some embodiments, the cold box device includes a cold box component, a gas-liquid separator, a first compressed air pipe, a return air pipe, and a drain pipe. A heat exchange chamber is provided inside the cold box component, and the cold box component is provided with a heat exchange inlet and a heat exchange outlet connected to the heat exchange chamber for heat exchange with the gasification heat exchanger. The gas-liquid separator is installed in the heat exchange chamber, and the gas-liquid separator is provided with a separation chamber and a first interface, a second interface, and a third interface connected to the separation chamber. One end of the first compressed air pipe is connected to the exhaust port of the air compressor, and the other end is inserted into the heat exchange chamber and connected to the first interface so that at least part of the compressed air flows into the separation chamber. One end of the return air pipe is connected to the air inlet of the air compressor, and the other end is inserted into the heat exchange chamber and connected to the second interface so that the gaseous air in the separation chamber flows back to the air inlet of the air compressor through the return air pipe. One end of the drain pipe is connected to the third interface in the heat exchange chamber, and the other end is connected to the liquid air storage tank for discharging liquid compressed air.

[0007] In some embodiments, the cold box equipment further includes an expander, a second compressed air pipe, and a flow guide pipe. One end of the second compressed air pipe is connected to the first compressed air pipe, and the other end of the second compressed air pipe is connected to the air inlet of the expander, so that compressed air enters the expander through the second compressed air pipe. The gas-liquid separator also has a fourth port connected to the separation chamber. One end of the flow guide pipe is connected to the outlet of the expander, and the other end of the flow guide pipe is connected to the fourth port, so that expanded and liquefied air flows into the separation chamber.

[0008] In some embodiments, one end of the second compressed air pipe is arranged in communication with the first compressed air pipe in the heat exchange chamber, and the expander is located outside the heat exchange chamber.

[0009] In some embodiments, the cold box equipment further includes a throttle valve, which is installed at one end of the first compressed air pipe close to the first interface and is used to adjust the flow rate of the compressed air.

[0010] In some embodiments, the gas-fired power generation device further includes a cold storage system comprising a cold storage device, a first heat exchange path, and a second heat exchange path. The cold storage device is configured to absorb and store cold energy. The first heat exchange path circulates a first heat exchange medium between the cold storage device and the vaporization heat exchanger, allowing the vaporization heat exchanger to absorb heat within the cold storage device. A second heat exchange medium flows through the second heat exchange path at least from the cold storage device to the cold box device, allowing the cold box device to absorb cold energy from the vaporization heat exchanger via the second heat exchange path, the cold storage device, and the first heat exchange path.

[0011] In some embodiments, when the cold box device includes a cold box component, the heat exchange cavity is connected to the heat exchange flow path through a heat exchange inlet and a heat exchange outlet, so that the second heat exchange medium cooled by the vaporization heat exchanger flows into the heat exchange cavity.

[0012] In some embodiments, the cold storage device includes a cold storage tank and a plurality of cold storage blocks. The cold storage tank is provided with a cold storage cavity and a cold storage inlet and a cold storage outlet communicating with the cold storage cavity. The plurality of cold storage blocks are stacked in the cold storage cavity.

[0013] In the first heat exchange flow path, a first heat exchange medium flows through the cold storage inlet and through the multiple cold storage blocks within the cold storage chamber for heat exchange. After heat exchange, the first heat exchange medium flows out of the cold storage chamber through the cold storage outlet. In the second heat exchange flow path, a second heat exchange medium flows through the cold storage inlet and through the multiple cold storage blocks within the cold storage chamber for heat exchange. After heat exchange, the second heat exchange medium flows out of the cold storage chamber through the cold storage outlet.

[0014] In some embodiments, the air energy storage system further includes an evaporative heat exchanger installed between the liquid air storage tank and the expansion generator. The cold storage system further includes a third heat exchange flow path, through which a third heat exchange medium flows at least from the evaporative heat exchanger to the cold storage device, so that the cold box device absorbs cold energy from the evaporative heat exchanger through the third heat exchange flow path, the cold storage device, and the second heat exchange flow path.

[0015] In some embodiments, the gas-fired generator set further comprises a gas turbine generator, a waste heat boiler, and a steam turbine generator. Fuel vaporized in the gasification heat exchanger is combusted within the gas turbine generator, driving the gas turbine generator to generate electricity. The waste heat boiler is located on the exhaust side of the gas turbine generator. High-temperature flue gas from the gas turbine generator heats the waste heat boiler to generate high-temperature steam, which drives the steam turbine generator to generate electricity.

[0016] In some embodiments, the air energy storage system further includes a second heat exchanger and a smoke exhaust circuit. The second heat exchanger is installed between the liquid air storage tank and the expansion generator. One end of the smoke exhaust circuit is connected to the exhaust port of the waste heat boiler, and the other end of the smoke exhaust circuit is located at least near the second heat exchanger, used to heat the compressed air flowing from the liquid air storage tank to the expansion generator.

[0017] In some embodiments, the air energy storage system further includes at least one of an air purifier and a first heat exchanger.

[0018] The air purifier is arranged between the air compressor and the liquid air storage tank, and is used to filter the compressed impurities in the compressed air flowing to the liquid air storage tank. The compressed impurities include at least water vapor, helium, neon and carbon dioxide.

[0019] The first heat exchanger is arranged between the air compressor and the cold box equipment to cool the compressed high-temperature air;

[0020] When the air energy storage system includes both an air purifier and a first heat exchanger, the air purifier is installed between the air compressor and the first heat exchanger, and the air purifier filters compressed impurities through a molecular sieve.

[0021] In this way, by configuring a gas-fired power generation device including a gas-fired power generation system and an air energy storage system, the gas-fired power generation unit supplies gasified liquid fuel through the gas supply device and the gasification heat exchanger for combustion and power generation, and the output power of the whole machine is flexibly adjusted through the air energy storage system. For example, during the off-peak period of electricity consumption, the extra electricity generated by the gas-fired power generation unit and the excess electricity of the external power grid can be supplied to the air energy storage system to drive the air compressor to compress the air, and the compressed liquid air is stored in the liquid air storage tank to reduce the output power of the whole machine. When the electricity consumption is at its peak, the liquid air stored in the liquid air storage tank can drive the expansion generator to generate electricity, and cooperate with the gas-fired power generation unit to increase the output power of the whole machine to ensure the peak electricity load, thereby realizing the flexible deployment of the gas-fired power generation unit during the peak and trough periods of electricity consumption.

[0022] Furthermore, in the gas-fired power generation device of the present application, during the process of compressing and storing liquid air by the above-mentioned air energy storage system during the off-peak period of electricity consumption, since the cold box equipment is arranged between the air compressor and the liquid air storage tank, the compressed high-temperature air can exchange heat with the vaporization heat exchanger while flowing through the cold box equipment. For example, at the vaporization heat exchanger, the liquid fuel absorbs the heat nearby and quickly vaporizes for combustion and power generation, and produces a large amount of high-quality cold source. In the cold box equipment, part or all of the compressed air needs to release a large amount of heat during the liquefaction process. The accumulation of heat will cause a high temperature area to form inside and near the cold box equipment, thereby reducing the liquefaction rate and liquefaction degree ratio of the compressed air. However, by transporting the high-quality cold source released during the vaporization of the liquid fuel at the vaporization heat exchanger to the cold box equipment, the compressed air can exchange heat with the vaporization heat exchanger while flowing through the cold box equipment, thereby quickly cooling the compressed high-temperature air and increasing the liquefaction rate and liquefaction degree ratio of the compressed air.

[0023] In this way, through the setting of the cold box equipment, in the process of liquefying the compressed air and releasing heat, the high-grade cold source released in the gasification process of the liquid fuel at the gasification heat exchanger can be absorbed, thereby improving the utilization efficiency of the liquid fuel in the gasification and combustion process. In addition, since the related technical solutions have higher costs and larger floor space during the process of liquefying the compressed air, such as through structures such as a larger volume of heat exchangers and adiabatic compressors. The embodiment of the present application introduces a high-grade cold source in the gasification process of the liquid fuel for cooling during the liquefaction stage of the compressed air, which is beneficial to reducing the volume of the heat exchanger and the adiabatic compressor in the liquefaction process of this stage, and reducing the floor space and cost of the whole machine, and is beneficial to increasing the liquefaction speed and liquefaction degree ratio of the compressed air, thereby improving the conversion efficiency in the power allocation process between troughs and peaks, and has better economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A schematic structural diagram of a gas-fired power generation device integrated with liquefied air energy storage provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A structural schematic diagram of the cold box equipment shown in;

[0027] Figure 3 for Figure 1A structural schematic diagram of a cold storage device is shown in FIG.

[0028] Reference numerals:

[0029] 1000. Gas-fired power generation device; 100. Gas-fired power generation system; 110. Gas-fired generator set; 111. Gas turbine generator; 112. Waste heat boiler; 113. Steam turbine generator; 120. Gas supply device; 130. Gasification heat exchanger;

[0030] 200, air energy storage system; 210, air compressor; 220, cold box equipment; 221, cold box parts; 2211, heat exchange chamber; 2212, heat exchange inlet; 2213, heat exchange outlet; 222, gas-liquid separator; 2221, separation chamber; 2222, first interface; 2223, second interface; 2224, third interface; 2225, fourth interface; 223, first compressed air pipe; 224, return air pipe; 225, liquid discharge pipe; 226, throttle valve; 227, second compressed air pipe; 228, expander; 229, flow guide pipe; 230, liquid-air storage tank; 240, expansion generator; 250, first heat exchanger; 260, air purifier; 270, evaporative heat exchanger; 280, second heat exchanger; 290, exhaust circuit;

[0031] 300. Cold storage system; 310. Cold storage device; 311. Cold storage tank; 312. Cold storage chamber; 313. Cold storage inlet; 314. Cold storage outlet; 315. Cold storage block; 320. First heat exchange path; 330. Second heat exchange path; 340. Third heat exchange path. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0037] See Figure 1 ,like Figure 1This is a schematic diagram of the structure of a gas-fired power generation device with integrated liquefied air energy storage (hereinafter referred to as gas-fired power generation device 1000) provided in an embodiment of the present application. Gas-fired power generation device 1000 includes a gas-fired power generation system 100 and an air energy storage system 200. Gas-fired power generation system 100 includes a gas-fired generator set 110, a gas supply device 120, and a vaporization heat exchanger 130. Gas supply device 120, which can be a liquid storage tank or a gas supply pipeline, is used to provide liquid fuel to vaporization heat exchanger 130. The liquid fuel absorbs heat and vaporizes within vaporization heat exchanger 130, and is burned by gas-fired generator set 110 to generate electricity. Air energy storage system 200 includes an air compressor 210, a cold box 220, a liquid air storage tank 230, and an expansion generator 240. The air compressor 210 compresses air. The compressed air releases heat as it flows through the cold box 220 and exchanges heat with the vaporization heat exchanger 130. The liquid air storage tank 230 is used to store the liquid compressed air flowing out of the cold box equipment 220, and the expansion generator 240 is used to generate electricity using the liquid compressed air.

[0038] Thus, by configuring the gas-fired power generation device 1000 to include the gas-fired power generation system 100 and the air energy storage system 200, the gas-fired generator set 110 supplies gasified liquid fuel through the gas supply device 120 and the gasification heat exchanger 130 for combustion and power generation, and the air energy storage system 200 flexibly adjusts the output power of the entire device. For example, during periods of low electricity demand, the excess power generated by the gas-fired generator set 110 and the excess power from the external power grid can be supplied to the air energy storage system 200, driving the air compressor 210 to compress air and store the compressed liquid air in the liquid air storage tank 230 to reduce the output power of the entire device. During periods of peak electricity demand, the liquid air stored in the liquid air storage tank 230 can drive the expansion generator 240 to generate electricity, and cooperate with the gas-fired generator set 110 to increase the output power of the entire device to ensure peak electricity load, thereby achieving flexible adjustment of the gas-fired power generation device 1000 during peak and low electricity demand periods.

[0039] Moreover, in the gas-fired power generation device 1000 of the present application, in the process of compressing and storing liquid air during the off-peak period of electricity consumption by the above-mentioned air energy storage system 200, since the cold box equipment 220 is arranged between the air compressor 210 and the liquid air storage tank 230, the compressed high-temperature air can exchange heat with the gasification heat exchanger 130 in the process of flowing through the cold box equipment 220. For example, at the gasification heat exchanger 130, the liquid fuel absorbs the nearby heat and quickly vaporizes for combustion power generation, and produces more high-grade cold sources. In the cold box equipment 220, part or all of the compressed air needs to release a large amount of heat during the liquefaction process. The accumulation of heat will cause a higher temperature area to form inside and near the cold box equipment 220, thereby reducing the liquefaction rate and liquefaction degree ratio of the compressed air. However, by transporting the high-quality cold source released during the gasification process of the liquid fuel at the gasification heat exchanger 130 to the cold box device 220, the compressed air can exchange heat with the gasification heat exchanger 130 while flowing through the cold box device 220, thereby rapidly cooling the compressed high-temperature air to increase the liquefaction rate and liquefaction degree ratio of the compressed air. In this way, through the provision of the cold box device 220, the high-quality cold source released during the gasification process of the liquid fuel at the gasification heat exchanger 130 can be absorbed during the process of liquefying the compressed air and releasing heat, thereby improving the utilization efficiency of the liquid fuel during the gasification and combustion process. In addition, since the related technical solutions use structures such as large-volume heat exchangers and adiabatic compressors during the process of liquefying the compressed air, they have high costs and occupy a large area. The embodiment of the present application introduces a high-grade cold source in the liquid fuel gasification process for cooling during the compressed air liquefaction stage, which is beneficial to reducing the volume of the heat exchanger and the adiabatic compressor in the liquefaction process of this stage, and reducing the floor space and cost of the entire machine. It is also beneficial to increase the liquefaction speed and liquefaction degree ratio of the compressed air, thereby improving the conversion efficiency in the power allocation process between troughs and peaks, and has good economic benefits.

[0040] In some embodiments, combined Figure 1 and Figure 2 ,like Figure 2 for Figure 1A structural schematic diagram of the cold box device 220 is shown in the figure. The cold box device 220 includes a cold box part 221, a gas-liquid separator 222, a first compressed air pipe 223, a return air pipe 224, and a drain pipe 225. A heat exchange chamber 2211 is provided inside the cold box part 221, and the cold box part 221 is provided with a heat exchange inlet 2212 and a heat exchange outlet 2213 connected to the heat exchange chamber 2211 for heat exchange with the gasification heat exchanger 130. The gas-liquid separator 222 is installed in the heat exchange chamber 2211. The gas-liquid separator 222 can be a vertical structure or a bedroom structure. The gas-liquid separator 222 is provided with a separation chamber 2221 and a first interface 2222, a second interface 2223, and a third interface 2224 connected to the separation chamber 2221. One end of the first compressed air pipe 223 is connected to the exhaust port of the air compressor 210. The other end of the first compressed air pipe 223 is inserted into the heat exchange chamber 2211 and connected to the first port 2222, so that at least part of the compressed air flows into the separation chamber 2221. One end of the return air pipe 224 is connected to the air inlet of the air compressor 210. The other end of the return air pipe 224 is inserted into the heat exchange chamber 2211 and connected to the second port 2223, so that the gaseous air in the separation chamber 2221 flows back to the air inlet of the air compressor 210 through the return air pipe 224. One end of the drain pipe 225 is connected to the third port 2224 in the heat exchange chamber 2211, and the other end of the drain pipe 225 is connected to the liquid air storage tank 230 for discharging liquid compressed air.

[0041] By installing a gas-liquid separator 222 within the cold box 221, the air compressed by the air compressor 210 flows through the first compressed air pipe 223 into the separation chamber 2221 for gas-liquid separation. Within the separation chamber 2221, the separated gaseous air flows back to the air inlet of the air compressor 210 through the second interface 2223 and the return air pipe 224 for re-compression circulation. The separated liquid air flows through the third interface 2224 and the drain pipe 225 into the liquid air storage tank 230 for storage, thereby achieving temporary power conservation during the off-peak period. Moreover, in the heat exchange chamber 2211, through the heat exchange inlet 2212 and the heat exchange outlet 2213, the circulating medium between the cold box 221 and the gasification heat exchanger 130 can transport the high-grade cold source at the gasification heat exchanger 130 to the heat exchange chamber 2211, so as to cool the compressed air in the first compressed air pipe 223 and the separation chamber 2221, thereby increasing the liquefaction speed and liquefaction degree ratio of the compressed air, so as to improve the conversion efficiency in the power allocation process between troughs and peaks, and have better economic benefits.

[0042] For flow control during the air compression process, the air compression volume per unit time can be adjusted by adjusting the operating power of the air compressor 210 .

[0043] Or, as Figure 2As shown, the cold box equipment 220 also includes a throttle valve 226, which is installed at one end of the first compressed air pipe 223 near the first interface 2222 to regulate the flow of compressed air. The throttle valve 226 can be installed inside or outside the heat exchange chamber 2211, without limitation.

[0044] Taking the throttle valve 226 installed in the heat exchange chamber 2211 as an example, the setting of the throttle valve 226 can adjust the flow of compressed air entering the separation chamber 2221 through the first compressed air pipe 223, so as to control the conversion rate in the compressed air liquefaction process through flexible adjustment.

[0045] For example, the portion of the first compressed air pipe 223 in the heat exchange chamber 2211 can be connected to a plate heat exchanger or a coil flow path can be added to increase the heat exchange area of ​​the first compressed air pipe 223 in the heat exchange chamber 2211, so as to facilitate sufficient heat exchange of the compressed air in the first compressed air pipe 223 to dissipate heat and cool down, thereby improving the conversion rate when the compressed air is liquefied.

[0046] In some embodiments, continue to refer to Figure 2 The cold box equipment 220 also includes a second compressed air pipe 227, an expander 228, and a flow guide pipe 229. One end of the second compressed air pipe 227 is connected to the first compressed air pipe 223, and the other end of the second compressed air pipe 227 is connected to the air inlet of the expander 228, so that compressed air can enter the expander 228 through the second compressed air pipe. The gas-liquid separator 222 also has a fourth port 2225 connected to the separation chamber 2221. One end of the flow guide pipe 229 is connected to the outlet of the expander 228, and the other end of the flow guide pipe 229 is connected to the fourth port 2225, so that the expanded and liquefied air can flow into the separation chamber 2221.

[0047] The expander 228 is configured to allow some or all of the compressed air to flow into the expander 228 via the second compressed air pipe 227 for isothermal expansion, generating work and driving the liquefaction of the compressed air. Within the expander 228, at least a portion of the isothermally expanded air is liquefied and flows through the flow guide pipe 229 into the separation chamber 2221 for gas-liquid separation. The separated liquid compressed air then flows into the liquid-air storage tank 230 for storage, while the unliquefied air is compressed again by the air compressor 210 via the return air pipe 224.

[0048] The configuration of heat exchange chamber 2211 allows the use of the high-quality cold source at vaporization heat exchanger 130 to cool the compressed air, thereby increasing the liquefaction rate and conversion rate of the compressed air. Furthermore, the configuration of expander 228 allows a portion of the air to expand and liquefy adiabatically at expander 228, thereby increasing the liquefaction rate of the compressed air.

[0049] For example, one end of the second compressed air pipe 227 is connected to the first compressed air pipe 223 in the heat exchange chamber 2211, so that part of the compressed air flowing to the expander 228 can be initially cooled in the heat exchange chamber 2211, which is conducive to improving the liquefaction conversion ratio of the compressed air.

[0050] Furthermore, locating the expander 228 outside the heat exchange chamber 2211 prevents the expander 228 from encroaching upon the interior space of the cold box 221. Furthermore, due to the presence of the heat exchange chamber 2211, the expander 228 can be miniaturized to facilitate the liquid-phase conversion of the compressed air within the heat exchange chamber 2211, thereby contributing to the overall miniaturization of the cold box 220.

[0051] In the embodiment of the present application, the heat exchange between the cold box equipment 220 and the vaporization heat exchanger 130 can be carried out through a direct heat exchange flow path to drive the circulation of the heat exchanger, thereby enabling direct heat exchange between the cold box equipment 220 and the vaporization heat exchanger 130.

[0052] Alternatively, in some embodiments, Figure 1 As shown, the gas-fired power generation device 1000 further includes a cold storage system 300, which includes a cold storage device 310, a first heat exchange path 320, and a second heat exchange path 330. The cold storage device 310 is used to absorb and store cold energy. The first heat exchange path 320 circulates a first heat exchange medium between the cold storage device 310 and the vaporization heat exchanger 130, allowing the vaporization heat exchanger 130 to absorb heat from the cold storage device 310. The second heat exchange medium flows from the cold storage device 310 to the cold box device 220 via the second heat exchange path 330, the cold storage device 310, and the first heat exchange path 320, allowing the cold box device 220 to absorb cold energy from the vaporization heat exchanger 130.

[0053] For example, the vaporization heat exchanger 130 may be a dual-channel plate heat exchanger, a shell and tube heat exchanger, or a fin heat exchanger. For example, the plate heat exchanger and the fin heat exchanger may be externally covered with a shell having a circulation flow path.

[0054] The liquid gas absorbs heat through one of the heat exchange channels, vaporizes, and flows to the gas-fired generator set 110. The other heat exchange channel can be a portion of the first heat exchange path 320 on the vaporization heat exchanger 130 side, so that the first heat exchange medium circulates between the vaporization heat exchanger 130 and the cold storage tank 310 through the first heat exchange path 320, and transports the high-quality cold source at the vaporization heat exchanger 130 to the cold storage tank 310 for storage or heat exchange with the second heat exchange path 330.

[0055] At the cold box equipment 220, combined Figure 1 and Figure 2Since the cold box part 221 has a connected heat exchange cavity 2211, a heat exchange inlet 2212 and a heat exchange outlet 2213, the heat exchange cavity 2211 can be set as a part of the second heat exchange flow path 330, so that the heat exchange inlet 2212 and the heat exchange outlet 2213 are connected to the second heat exchange flow path 330, so that the second heat exchange medium circulates between the heat exchange cavity 2211 and the cold storage tank 310 through the second heat exchange flow path 330, and the first heat exchange medium and the second heat exchange medium exchange heat in the cold storage tank 310, so that the compressed air to be liquefied in the heat exchange cavity 2211 can be fully cooled and lowered during the gasification heat absorption process of the liquid fuel at the gasification heat exchanger 130.

[0056] Specifically, by providing the cold storage device 310, during high-power operation of the gas-fired power generation system 100, a large amount of high-quality cold energy generated during the vaporization of a large amount of liquid gas can be stored in the cold storage device 310 via the first heat exchange flow path 320. When the air compressor 210 in the air energy storage system 200 is operating at high power, the high-quality cold energy stored in the cold storage device 310 can be utilized via the cold box device 220 and the second heat exchange flow path 330 to cool the compressed air, thereby increasing the liquefaction rate and liquefaction conversion rate of the compressed air. Specifically, by providing the cold storage device 310, the first heat exchange flow path 320, and the second heat exchange flow path 330, the high-quality cold energy of the gasification heat exchanger 130 can be temporarily stored for peak-shifting allocation, further improving the overall energy efficiency of the gas-fired power generation device 1000.

[0057] In the above Figure 2 In the heat exchange chamber 2211 of the embodiment, the second heat exchange medium can flow directly into the heat exchange chamber 2211 through the heat exchange inlet 2212 and the heat exchange outlet 2213 to cool the compressed air. Preferably, the second heat exchange medium can be a liquid heat exchange medium.

[0058] For example, the second heat exchange medium can also be air. Air can circulate within the second heat exchange flow path 330 as the second heat exchange medium to transport the high-quality cold source from the cold accumulator 310 to the heat exchange chamber 2211 to cool the compressed air. Alternatively, air can be drawn from the cold accumulator 310 into the second heat exchange flow path 330 as the second heat exchange medium. After cooling through the heat exchange chamber 2211, it is discharged from the second heat exchange flow path 330 through the heat exchange outlet 2213, which helps simplify the overall components.

[0059] Alternatively, the heat exchange chamber 2211 may be filled with a cold box heat exchange agent (preferably a liquid heat exchange agent), and the portion of the second heat exchange path 330 within the heat exchange chamber 2211 may be a closed coil structure, a fin heat exchanger structure, or a plate heat exchanger structure. The circulation of the second heat exchange agent in the second heat exchange path 330 cools the cold box heat exchange agent in the heat exchange chamber 2211, thereby cooling the compressed air.

[0060] A dual-channel heat exchanger, such as a shell and tube heat exchanger, may also be provided within the heat exchange chamber 2211. The first channel is connected to the first compressed air pipe to direct the compressed air to the separation chamber 2221 or the expander 228. The second channel is connected to the second heat exchange flow path 330 via the heat exchange inlet 2212 and the heat exchange outlet 2213 to cool the compressed air in the first channel using the second heat exchange agent.

[0061] Continue to refer to Figure 1 The air energy storage system 200 further includes an evaporative heat exchanger 270, which is installed between the liquid air storage tank 230 and the expansion generator 240. The evaporative heat exchanger 270 is disposed upstream of the second heat exchanger. The cold storage system 300 further includes a third heat exchange flow path 340, through which a third heat exchange medium flows at least from the evaporative heat exchanger 270 to the cold storage device 310, so that the cold storage device 310 absorbs the cold energy at the evaporative heat exchanger 270, and the cold box device 220 absorbs the cold energy at the evaporative heat exchanger 270 through the third heat exchange flow path 340, the cold storage device 310, and the second heat exchange flow path 330.

[0062] In the process of the liquid compressed air in the liquid air storage tank 230 flowing to the expansion generator 240 for power generation, the liquid compressed air can at least absorb heat through the evaporative heat exchanger, which is beneficial to improving the expansion effect of the liquid compressed air at the expansion generator 240, thereby improving the expansion power generation efficiency. In this process, the evaporative heat exchanger can be a dual-channel heat exchanger such as a shell and tube heat exchanger, the first channel is used to guide the compressed air, and the second channel is used for the circulation of the third refrigerant in the third circulation flow path, so that the third refrigerant can transport the cold at the evaporative heat exchanger 270 to the cold storage device 310 for storage, or it can be directly used to cool the compressed air at the cold box equipment 220, so as to further improve the energy utilization efficiency within the air energy storage system 200, and the setting of the cold storage device 310 can also provide a peak-shifting allocation function.

[0063] In the third heat exchange flow path 340 , the third heat exchange medium may be a liquid heat exchange medium having a low freezing point.

[0064] Alternatively, the third heat exchange medium can be air. In this case, the third heat exchange medium can circulate in the third heat exchange path 340. Alternatively, the third heat exchange medium can flow only from the evaporative heat exchanger 270 into the cold storage tank; then, some or all of the third heat exchange medium flows through the second heat exchange path 330 to the high-temperature cold box device 220, although this is not limited to this.

[0065] In some embodiments, as Figure 3 As shown, Figure 3 for Figure 1A schematic diagram of a cold storage device 310 is shown in FIG. Cold storage device 310 includes a cold storage tank 311 and a plurality of cold storage blocks 315. Cold storage tank 311 has a cold storage chamber 312, a cold storage inlet 313, and a cold storage outlet 314 communicating with cold storage chamber 312. A plurality of cold storage blocks 315 are stacked within cold storage chamber 312.

[0066] Exemplarily, the cold storage block 315 can be a solid structure or a liquid structure with a fixed shape. While facilitating heat exchange, the cold storage block 315 has a high specific heat capacity, thereby lowering the temperature of the cold storage block 315 to store cold in the cold storage chamber 312. Accordingly, the cold storage tank 311 has a thicker wall or better thermal insulation properties to reduce the loss of cold stored in the cold storage chamber 312 due to heat exchange with the outside world.

[0067] In the first heat exchange flow path 320, the first heat exchanger flows through the cold storage inlet 313 and through the multiple cold storage blocks 315 within the cold storage chamber 312 for heat exchange. After heat exchange, the first heat exchanger flows out of the cold storage chamber 312 through the cold storage outlet 314. Specifically, the side of the first heat exchange flow path 320 near the cold storage tank 310 is connected to the cold storage inlet 313 and the cold storage outlet 314, making the cold storage chamber 312 a part of the first heat exchange flow path 320. The first heat exchanger flowing through the cold storage blocks 315 cools the cold storage blocks 315, causing them to drop in temperature, thereby storing cold in the cold storage tank 310. The first heat exchanger then circulates to the vaporization heat exchanger 130 to continue absorbing cold.

[0068] In the second heat exchange path 330, the second heat exchanger flows through the cold storage inlet 313 and through the multiple cold storage blocks 315 within the cold storage chamber 312 for heat exchange. After heat exchange, the second heat exchanger then exits the cold storage chamber 312 through the cold storage outlet 314. Specifically, the side of the second heat exchange path 330 near the cold storage tank 310 is connected to the cold storage inlet 313 and the cold storage outlet 314, making the cold storage chamber 312 also part of the second heat exchange path 330. This allows the second heat exchanger flowing through the cold storage blocks 315 to be cooled by the cold storage blocks 315, thereby absorbing the cold stored in the cold storage tank 310 (equivalent to heat exchange with the first heat exchange path 320). The second heat exchanger then flows into the heat exchange chamber 2211, cooling the compressed air within.

[0069] Correspondingly, in the third heat exchange flow path 340, the third heat exchange medium flows through the cold storage inlet 313 and through the multiple cold storage blocks 315 within the cold storage chamber 312 for heat exchange. After heat exchange, the third heat exchange medium flows out of the cold storage chamber 312 through the cold storage outlet 314. That is, the side of the third heat exchange flow path 340 near the cold storage tank 310 is connected to the cold storage inlet 313 and the cold storage outlet 314, so that the cold storage chamber 312 is also part of the third heat exchange flow path 340. The third heat exchange medium flowing through the cold storage blocks 315 can cool the cold storage blocks 315 and reduce their temperature, thereby storing cold energy in the cold storage tank 310. This is used to cool the compressed air within the heat exchange chamber 2211 via the second heat exchange flow path 330.

[0070] In the above embodiment, the first heat exchange flow path 320, the second heat exchange flow path 330, and the third heat exchange flow path 340 can be operated simultaneously or sequentially, without limitation. The first heat exchange flow path 320, the second heat exchange flow path 330, and the third heat exchange flow path 340 need to be provided with power transduction to drive the flow of the first heat exchange medium, the second heat exchange medium, and the third heat exchange medium.

[0071] The first heat exchanger, the second heat exchanger, and the third heat exchanger can be the same type of heat exchanger. If the first heat exchanger, the second heat exchanger, and the third heat exchanger are all circulated and utilized, the first heat exchanger, the second heat exchanger, and the third heat exchanger can be set to be air, nitrogen, or a low-freezing-point liquid.

[0072] If the second and third heat exchange agents are not circulated, that is, at least the second and third heat exchange agents are air, local availability is facilitated. In this case, the air that has undergone heat exchange by flowing into the cold storage chamber 312 through the third heat exchange flow path 340 can flow directly into the cold storage outlet 314 and into the second heat exchange flow path 330 to cool the compressed air within the heat exchange chamber 2211.

[0073] The second heat exchange agent and the third heat exchange agent may also be set to air, and the first heat exchange agent may be nitrogen, which is not limited.

[0074] In some other embodiments, the cold storage chamber 312 of the cold storage tank 311 is filled with cold storage liquid. The first, second, and third heat exchange paths 320, 330, and 340 are independent circulation paths. Each path includes a heat exchange structure, such as a plate heat exchanger or a fin heat exchanger, within the cold storage chamber 312. Pipes are introduced and removed via a cold storage inlet 313 and a cold storage outlet 314. This allows the cold storage chamber 312 to store cold energy through temperature fluctuations of the cold storage liquid (which has a low freezing point). Heat exchange can also occur within the cold storage chamber 312 through the first, second, and third heat exchange paths 320, 330, and 340. For example, a circulating pump can be provided within the cold storage chamber 312 to circulate the cold storage liquid, thereby improving the uniformity of its temperature distribution.

[0075] In some embodiments, as Figure 1 As shown, the air energy storage system 200 further includes a first heat exchanger 250, which is disposed between the air compressor 210 and the cold box device 220 and is used to cool the compressed high-temperature air. Figure 2 One end of the first compressed air pipe 223 away from the gas-liquid separator 222 is connected to the exhaust port of the air compressor 210 through the first heat exchanger 250 .

[0076] This facilitates the initial cooling of the compressed air flowing into the cold box 221 by the cold box equipment 220. For example, the first heat exchanger 250 can be a plate heat exchanger or a fin heat exchanger, allowing the external air to quickly remove the heat from the compressed air within the first heat exchanger 250. The cold box equipment 220 eliminates the need for a large first heat exchanger, facilitating a compact design for the entire device.

[0077] In addition, combined Figure 1 The air energy storage system 200 also includes an air purifier 260, which is arranged between the air compressor 210 and the liquid air storage tank 230, and is used to filter compressed impurities in the compressed air flowing into the liquid air storage tank 230. The compressed impurities include at least water vapor, helium, neon and carbon dioxide.

[0078] For example, the air purifier 260 can be installed between the air compressor 210 and the cold box equipment 220. For example, the air purifier 260 is installed between the air compressor 210 and the first heat exchanger 250, so that the air compressed by the air compressor 210 flows through the air purifier 260, the first heat exchanger 250, and the cold box equipment 220 in sequence. At this time, the air purifier 260 filters compressed impurities such as water vapor, helium, neon, and carbon dioxide through molecular sieves.

[0079] Alternatively, the air purifier 260 may be disposed upstream and / or downstream of the cold box 220. Upstream of the cold box 220, the air purifier 260 is used to separate compressed impurities that are easily compressed and liquefied, such as water vapor and carbon dioxide. Downstream of the cold box 220, the air purifier 260 is used to separate compressed impurities that are not easily compressed and liquefied, such as helium and neon.

[0080] By filtering and purifying compressed air in the above-mentioned various ways to remove harmful gases and pollutants in the air, it is possible to avoid the influence of some compressed impurities on reducing the efficiency of the heat exchanger, and also to avoid equipment failure caused by corrosion or blockage caused by some compressed impurities.

[0081] In an embodiment of the present application, the gas power generation system 100 generates electricity by burning a gaseous fuel to drive a generator, wherein the gaseous fuel may be natural gas, liquefied petroleum gas, hydrogen, methane or coal gas that can be liquefied for storage or transported by pipeline.

[0082] For example, the gas generator set 110 may include a gas turbine generator, which directly drives the gas turbine generator to rotate and generate electricity through the combustion of gaseous fuel, and can flexibly adjust the power generation.

[0083] Alternatively, the gas generator set 110 may also include a gas boiler and a steam turbine generator, so that the gaseous fuel burns in the gas boiler and generates high-temperature or supercritical water vapor, thereby driving the steam turbine generator to rotate and generate electricity, with higher fuel utilization efficiency.

[0084] In some embodiments, as Figure 1 As shown, gas-fired generator set 110 includes a gas turbine generator 111, a waste heat boiler 112, and a steam turbine generator 113. Fuel vaporized by gasification heat exchanger 130 is burned within gas turbine generator 111, driving gas turbine generator 111 to generate electricity. Waste heat boiler 112 is located on the exhaust side of gas turbine generator 111. High-temperature flue gas from gas turbine generator 111 heats waste heat boiler 112 to generate high-temperature steam, which drives steam turbine generator 113 to generate electricity.

[0085] Because the combustion temperature of gaseous fuel typically exceeds 1000°C during the power generation process of the gas turbine generator 111, the flue gas (or tail gas) emitted by the gas turbine generator 111 also has a relatively high temperature. To address this, a waste heat boiler is installed on the exhaust side of the gas turbine generator 111. This waste heat boiler heats the high-temperature flue gas from the gas turbine generator 111, generating high-temperature steam. This steam can be either high-temperature, high-pressure steam in a normal state or in a supercritical or ultra-supercritical state, thereby driving the steam turbine generator 113 to operate efficiently and generate electricity. This cascaded utilization of fuel combustion temperatures improves fuel efficiency for power generation.

[0086] Based on this, continue to refer to Figure 1 Air energy storage system 200 further includes a second heat exchanger 280 and a smoke exhaust circuit 290. Second heat exchanger 280 is installed between liquid air storage tank 230 and expansion generator 240. One end of exhaust circuit 290 is connected to the exhaust port of waste heat boiler 112, and the other end of exhaust circuit 290 is located at least near second heat exchanger 280, used to heat the compressed air flowing from liquid air storage tank 230 to expansion generator 240.

[0087] Exemplarily, the second heat exchanger 280 may be a dual-channel heat exchanger, such as a shell-and-tube heat exchanger, with one channel being used to output the compressed air directed from the liquid air storage tank 230 to the expansion generator 240. The other channel is used to heat the compressed air with the high-temperature flue gas (exhaust gas) discharged from the waste heat boiler 112, thereby improving the expansion effect of the compressed air at the expansion generator 240 and thereby increasing the output power of the energy storage system.

[0088] Alternatively, the second heat exchanger 280 may be a single-channel heat exchanger such as a plate heat exchanger or a fin heat exchanger, and may also heat the compressed air flowing inside by the high-temperature flue gas guided by the exhaust circuit 290 , without limitation.

[0089] Furthermore, by providing the second heat exchanger 280 and the smoke exhaust circuit 290 , a three-level gradient utilization of the temperature after fuel combustion is achieved, which is beneficial to improving the overall energy utilization efficiency and power generation efficiency of the gas power generation device 1000 .

[0090] In some embodiments, when the gas generator set 110 includes only the gas turbine generator 111, one end of the exhaust circuit 290 may be connected to the exhaust port of the gas turbine generator 111 to transfer the exhaust heat of the gas turbine generator 111 to the second heat exchanger 280 to heat the compressed air flowing from the second heat exchanger 280 to the expansion generator 240. This simplifies the configuration of the gas generator set 110 and also helps improve the overall gas utilization efficiency of the entire unit.

[0091] In other embodiments, the gas turbine generator 111 can be replaced with an internal combustion generator to generate electricity through combustion of gaseous fuel. In this case, a smoke exhaust circuit 290 can be provided at the exhaust port of the internal combustion generator to direct the exhaust heat from the internal combustion generator to the second heat exchanger 280, thereby heating the compressed air flowing from the second heat exchanger 280 to the expansion generator 240. While simplifying the configuration of the gas-fired generator set 110, it also helps improve the overall gas utilization efficiency and further expands the adaptability of the gas-fired generator set 110, which is not limited to this.

[0092] An air transfer pump or an air flow valve may be disposed downstream of the liquid air storage tank 230, such as between the liquid air storage tank 230 and the evaporation heat exchanger 270, to regulate the flow of compressed air to the expansion generator 240. Correspondingly, a gas transfer pump or a gas flow valve may be disposed downstream of the gas supply device 120, such as between the gas supply device 120 and the vaporization heat exchanger 130, to regulate the flow of liquid gas to the gas generator set 110.

[0093] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A gas-fired power generation device integrated with liquefied air energy storage, characterized in that: The gas-fired power generation device comprises: A gas power generation system, comprising a gas generator set, a gas supply device and a gasification heat exchanger, wherein the gas supply device is used to provide liquid fuel to the gasification heat exchanger, and the liquid fuel absorbs heat and gasifies in the gasification heat exchanger and is burned by the gas generator set to generate electricity; And an air energy storage system, including an air compressor, a cold box equipment, a liquid air storage tank and an expansion generator; the air compressor is used to compress air, and the compressed air releases heat and exchanges heat with the gasification heat exchanger in the process of flowing through the cold box equipment; the liquid air storage tank is used to store liquid compressed air flowing out of the cold box equipment, and the expansion generator is used to generate electricity through liquid compressed air.

2. The gas-fired power generation device integrated with liquefied air energy storage according to claim 1, characterized in that: The cold box equipment includes: A cold box component, wherein a heat exchange cavity is provided inside, and the cold box component is provided with a heat exchange inlet and a heat exchange outlet communicated with the heat exchange cavity, and is used for heat exchange with the gasification heat exchanger; A gas-liquid separator is installed in the heat exchange chamber, and the gas-liquid separator is provided with a separation chamber and a first interface, a second interface and a third interface connected with the separation chamber; a first compressed air pipe, one end of which is connected to the exhaust port of the air compressor, and the other end of which is inserted into the heat exchange cavity and connected to the first interface, so that at least part of the compressed air flows into the separation cavity; an air return pipe, one end of which is connected to the air inlet of the air compressor, and the other end of which is inserted into the heat exchange cavity and connected to the second interface, so that the gaseous air in the separation cavity flows back to the air inlet of the air compressor through the air return pipe; and a liquid discharge pipe, one end of which is connected to the third interface in the heat exchange cavity, and the other end of which is connected to the liquid-air storage tank, for discharging liquid compressed air.

3. The gas-fired power generation device integrated with liquefied air energy storage according to claim 2, characterized in that: The cold box equipment also includes: Expander; a second compressed air pipe, one end of which is connected to the first compressed air pipe, and the other end of which is connected to the air inlet end of the expander, so that compressed air enters the expander through the second compressed air pipe; and a flow guide pipe, the gas-liquid separator is also provided with a fourth interface connected to the separation chamber, one end of the flow guide pipe is connected to the outlet end of the expander, and the other end of the flow guide pipe is connected to the fourth interface, so that the expanded liquefied air flows into the separation chamber.

4. The gas-fired power generation device integrated with liquefied air energy storage according to claim 3 is characterized in that: One end of the second compressed air pipe is connected to the first compressed air pipe in the heat exchange chamber, and the expander is located outside the heat exchange chamber.

5. The gas-fired power generation device integrated with liquefied air energy storage according to claim 2, characterized in that: The cold box equipment also includes: A throttle valve is installed at one end of the first compressed air pipe close to the first interface and is used to adjust the flow rate of compressed air.

6. The gas-fired power generation device integrated with liquefied air energy storage according to any one of claims 1 to 5, characterized in that: The gas-fired power generation device further includes a cold storage system, which includes: Cold storage device, used to absorb and store cold energy; a first heat exchange flow path, wherein a first heat exchange medium circulates between the cold storage device and the vaporizing heat exchanger so that the vaporizing heat exchanger absorbs heat in the cold storage device; and a second heat exchange path, through which a second heat exchange medium flows at least from the cold storage device to the cold box device, so that the cold box device absorbs the cold at the vaporization heat exchanger through the second heat exchange path, the cold storage device and the first heat exchange path.

7. The gas-fired power generation device integrated with liquefied air energy storage according to claim 6, characterized in that: In the case where the cold box equipment includes a cold box component, the heat exchange cavity is connected to the heat exchange flow path through a heat exchange inlet and a heat exchange outlet, so that the second heat exchange medium cooled by the vaporization heat exchanger flows into the heat exchange cavity.

8. The gas-fired power generation device integrated with liquefied air energy storage according to claim 6, characterized in that: The cold storage device comprises: A cold storage tank, wherein the cold storage tank is provided with a cold storage cavity and a cold storage inlet and a cold storage outlet communicated with the cold storage cavity; and a plurality of cold storage blocks, wherein the plurality of cold storage blocks are stacked in the cold storage chamber; Among them, in the first heat exchange flow path, the first heat exchanger flows through the cold storage inlet through the multiple cold storage blocks in the cold storage chamber for heat exchange, and the first heat exchanger after heat exchange flows out of the cold storage chamber through the cold storage outlet; in the second heat exchange flow path, the second heat exchanger flows through the cold storage inlet through the multiple cold storage blocks in the cold storage chamber for heat exchange, and the second heat exchanger after heat exchange flows out of the cold storage chamber through the cold storage outlet.

9. The gas-fired power generation device integrated with liquefied air energy storage according to claim 6, characterized in that: The air energy storage system further comprises an evaporative heat exchanger, which is installed between the liquid air storage tank and the expansion generator; The cold storage system also includes a third heat exchange flow path, and a third heat exchanger flows from at least the evaporative heat exchanger to the cold storage device through the third heat exchange flow path, so that the cold box equipment absorbs the cold at the evaporative heat exchanger through the third heat exchange flow path, the cold storage device and the second heat exchange flow path.

10. The gas-fired power generation device integrated with liquefied air energy storage according to any one of claims 1 to 5, characterized in that: The gas generator set also includes: A gas turbine generator, in which the fuel gasified by the gasification heat exchanger is burned and drives the gas turbine generator to generate electricity; A waste heat boiler, wherein the waste heat boiler is arranged on the exhaust side of the gas turbine generator; And a steam turbine generator, the high-temperature flue gas discharged by the gas turbine generator heats the waste heat boiler to generate high-temperature water vapor to drive the steam turbine generator to generate electricity.

11. The gas-fired power generation device integrated with liquefied air energy storage according to claim 10, characterized in that: The air energy storage system further includes: a second heat exchanger, the second heat exchanger being installed between the liquid air storage tank and the expansion generator; and a smoke exhaust circuit, one end of which is connected to the smoke exhaust port of the waste heat boiler, and the other end of which is arranged at least close to the second heat exchanger for heating the compressed air flowing from the liquid air storage tank to the expansion generator.

12. The gas-fired power generation device integrated with liquefied air energy storage according to any one of claims 1 to 5, characterized in that: The air energy storage system further includes: An air purifier, the air purifier is arranged between the air compressor and the liquid air storage tank, and is used to filter compressed impurities in the compressed air flowing to the liquid air storage tank, the compressed impurities at least including water vapor, helium, neon and carbon dioxide; and / or, a first heat exchanger, the first heat exchanger being disposed between the air compressor and the cold box equipment and used for cooling the compressed high-temperature air; Wherein, when the air energy storage system includes both an air purifier and a first heat exchanger, the air purifier is installed between the air compressor and the first heat exchanger, and the air purifier filters the compressed impurities through a molecular sieve.

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