A new type of liquid air energy storage cold storage system and method based on fluidization technology

Abstract

The application provides a novel liquid air energy storage cold storage system and method based on fluidization technology, and relates to the technical field of energy storage.The cold storage system comprises a particle storage device, a supply fluidized bed, a bellows, a fluidized bed heat exchanger, a separation fluidized bed and a air supply device, and the particle storage device is used for storing solid-phase particle medium after a cold release process or solid-phase particle medium after a cold storage process.The novel liquid air energy storage cold storage system based on fluidization technology has high safety and simple operation, and the type and size of the solid-phase particle medium can be adjusted according to the demand of the cold storage capacity;the heat exchange fluid and the solid-phase particle medium do not directly contact for heat exchange, so the application range is wider;the novel liquid air energy storage cold storage system based on fluidization technology has the advantages of high safety, simple operation, high cold storage efficiency and wide application range.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to a novel liquid air energy storage system and method based on fluidization technology. Background Technology

[0002] Fluidized bed technology has outstanding advantages such as high heat and mass transfer efficiency, good temperature uniformity, flexible equipment operation, and strong environmental adaptability, and is widely used in chemical, energy, and environmental protection fields.

[0003] The novel liquid air energy storage system based on fluidization technology utilizes fluidized bed heat transfer technology to fully leverage the uniformity and high-efficiency heat transfer performance of the fluidized bed, thereby improving the efficiency of cold storage and heat exchange. In the fluidized bed, particles are fluidized under the influence of airflow, resulting in faster and more uniform heat and mass transfer between the gas and particles. This provides favorable conditions for solid-phase cold storage, enabling the liquid air energy storage system to operate more efficiently and stably during charging and discharging.

[0004] For liquid air energy storage systems, cold storage is the core component. The supply side of the cold storage medium is the cold released by the re-vaporization of liquid air in the cold storage heat exchanger during the energy release and power generation process, as well as various other externally coupled cold. On the demand side, the high-pressure air that needs to be cooled and liquefied after compression during the energy storage stage is the cold storage. Cold storage solves the problem of the mismatch between the supply and demand of cold in time.

[0005] Currently, liquid air energy storage commonly employs fixed-bed solid-phase cold storage and liquid-phase cold storage as the main cold storage methods. Fixed-bed solid-phase cold storage uses solid-phase cold storage materials such as basalt and quartz sand, which have advantages such as low cost, environmental friendliness, and good safety. However, this method cannot avoid the thermocline effect, resulting in low cold storage efficiency. Liquid-phase cold storage typically uses hydrocarbon materials such as methanol and propane, which do not exhibit the thermocline effect, have fast heat transfer, and high cold storage efficiency. However, the working fluids for deep cryogenic liquid-phase cold storage that meet the operating conditions are mostly flammable and explosive substances, and are also expensive, which greatly limits its application range. Summary of the Invention

[0006] This invention provides a novel liquid air energy storage system based on fluidization technology to solve the problems of existing liquid air energy storage systems based on fluidization technology, such as thermocline effect, poor safety, and low energy storage efficiency.

[0007] This invention provides a novel liquid air energy storage cold storage system based on fluidization technology, comprising:

[0008] A particle storage device, wherein the particle storage device is used to store solid particulate media that have completed the cold release process or the cold storage process.

[0009] A fluidized bed is supplied, the inlet of which is connected to the outlet of the particle storage device, and the fluidized bed is used to fluidize the solid medium particles within itself.

[0010] A bellows, which is connected to the bottom of the fluidized bed;

[0011] A fluidized bed heat exchanger, wherein the inlet of the fluidized bed heat exchanger is connected to the outlet of the fluidized bed through multiple pipelines, and the fluidized bed heat exchanger is used to exchange heat between the heat exchange fluid and the solid particulate medium.

[0012] A separating fluidized bed is provided, wherein the feed inlet of the separating fluidized bed is connected to the discharge outlet of the fluidized bed heat exchanger, and the discharge outlet of the separating fluidized bed is connected to the feed inlet of the particle storage device; the separating fluidized bed is used to collect the solid-phase particle medium that has completed the cold release process or the solid-phase particle medium that has completed the cold storage process.

[0013] An air supply device is connected to the air outlet of the separated fluidized bed and the air inlet of the air box. The air supply device is used to deliver high-pressure air to the supplied fluidized bed through the air box.

[0014] According to the present invention, a novel liquid air energy storage cold storage system based on fluidization technology is provided, wherein the particulate storage device comprises:

[0015] A high-temperature particle storage tank, wherein the inlet of the high-temperature particle storage tank is connected to the outlet of the separating fluidized bed, and the outlet of the high-temperature particle storage tank is connected to the inlet of the supply fluidized bed, and the high-temperature particle storage tank is used to store the solid-phase particle medium that has completed the cooling process.

[0016] A cryogenic particle storage tank, wherein the inlet of the cryogenic particle storage tank is connected to the outlet of the separating fluidized bed, and the outlet of the cryogenic particle storage tank is connected to the inlet of the supply fluidized bed, and the cryogenic particle storage tank is used to store the solid-phase particle medium that has completed the cold storage process.

[0017] According to the present invention, a novel liquid air energy storage cold storage system based on fluidization technology is provided, wherein the particulate storage device further includes:

[0018] The first diversion pipe has its inlet connected to the outlet of the separated fluidized bed, the inlet of the high-temperature particle storage tank is connected to the first outlet of the first diversion pipe, and the inlet of the low-temperature particle storage tank is connected to the second outlet of the first diversion pipe.

[0019] According to the present invention, a novel liquid air energy storage cold storage system based on fluidization technology is provided, wherein the particulate storage device further includes:

[0020] The second diversion pipe has a first inlet connected to the outlet of the high-temperature particle storage tank, a second inlet connected to the outlet of the low-temperature particle storage tank, and an outlet connected to the inlet of the fluidized bed.

[0021] According to the present invention, a novel liquid air energy storage cold storage system based on fluidization technology is provided, wherein the particulate storage device further includes:

[0022] The first control valve is located at the feed inlet of the high-temperature particle storage tank;

[0023] The second control valve is located at the feed inlet of the cryogenic particle storage tank;

[0024] The third control valve is located at the outlet of the high-temperature particle storage tank;

[0025] The fourth control valve is located at the outlet of the cryogenic particle storage tank.

[0026] According to the present invention, a novel liquid air energy storage cold storage system based on fluidization technology is provided, wherein the air supply device includes:

[0027] An air supply duct, one end of which is connected to the air outlet of the separated fluidized bed, and the other end of which is connected to the air inlet of the air box;

[0028] A blower, which is connected in series with the air supply pipe.

[0029] According to the present invention, a novel liquid air energy storage cold storage system based on fluidization technology is provided, wherein the air supply device further includes:

[0030] A gas-solid separator is connected in series to the air supply pipe between the blower and the separation fluidized bed. The outlet of the gas-solid separator is connected to the inlet of the high-temperature particle storage tank through a first particulate matter circulation pipe, and the outlet of the gas-solid separator is connected to the inlet of the low-temperature particle storage tank through a second particulate matter circulation pipe.

[0031] According to the present invention, a novel liquid air energy storage cold storage system based on fluidization technology is provided, wherein the air supply device further includes:

[0032] The first return material control valve is located in the first particulate matter circulation pipe and is used to control the opening or closing of the first particulate matter circulation pipe.

[0033] The second return material control valve is located in the second particulate matter circulation pipe and is used to control the opening or closing of the second particulate matter circulation pipe.

[0034] This invention also provides a novel cold storage method for liquid air energy storage based on fluidization technology. The method is based on the novel cold storage system for liquid air energy storage based on fluidization technology described in any of the preceding claims, and includes:

[0035] The low-temperature solid-phase particulate medium is fed into the fluidized bed through a low-temperature particulate storage tank.

[0036] The air supply device delivers high-pressure air into the fluidized bed through a wind box, so that the solid particulate medium in the fluidized bed enters the fluidized bed heat exchanger in a fluidized state to exchange heat with the heat exchange fluid.

[0037] After heat exchange, the solid-phase particulate medium enters the separation fluidized bed;

[0038] The solid-phase particulate medium in the separation fluidized bed enters the high-temperature particulate storage tank.

[0039] or;

[0040] The solid-phase particulate medium is fed into the fluidized bed through the high-temperature particulate storage tank.

[0041] The air supply device delivers high-pressure air to the fluidized bed through the air box, so that the solid particulate medium in the fluidized bed enters the fluidized bed heat exchanger in a fluidized state to exchange heat with the heat exchange fluid.

[0042] After heat exchange, the low-temperature solid-phase particulate medium enters the separation fluidized bed;

[0043] The solid-phase particulate medium in the separated fluidized bed enters the low-temperature particulate storage tank.

[0044] A novel liquid air energy storage cold storage method based on fluidization technology provided by the present invention further includes:

[0045] The gas flow output from the fluidized bed is separated by a gas-solid separator, and the first return control valve is opened so that the solid particles separated by the gas-solid separator enter the high-temperature particle storage tank.

[0046] or;

[0047] The gas-solid separator separates the gas flow output from the fluidized bed and controls the second return control valve to open, so that the solid particles separated by the gas-solid separator enter the low-temperature particle storage tank.

[0048] The novel liquid air energy storage system based on fluidization technology provided by this invention offers high safety and simple operation due to the use of solid particulate media as the cold storage method. Furthermore, the type and size of the solid particulate media can be adjusted according to the required cold storage capacity. Since the heat exchange fluid does not directly contact the solid particulate media, its applicability is wider. This novel liquid air energy storage system based on fluidization technology of this invention has the advantages of high safety, simple operation, high cold storage efficiency, and wide applicability. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of the structure of a novel liquid air energy storage cold storage system based on fluidization technology provided by the present invention.

[0051] Figure label:

[0052] 10. Particle storage device; 11. High-temperature particle storage tank; 12. Low-temperature particle storage tank; 13. First diversion pipe; 14. Second diversion pipe; 15. First control valve; 16. Second control valve; 17. Third control valve; 18. Fourth control valve; 20. Supply fluidized bed; 30. Air box; 40. Fluidized bed heat exchanger; 50. Separating fluidized bed; 60. Air supply device; 61. Air supply pipe; 62. Blower; 63. Gas-solid separator; 64. First particle circulation pipe; 65. Second particle circulation pipe; 66. First return material control valve; 67. Second return material control valve. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0054] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0056] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] The following is combined Figure 1 The present invention describes the specific structure and working principle of a novel liquid air energy storage cold storage system based on fluidization technology.

[0059] like Figure 1 As shown, the novel liquid air energy storage system based on fluidization technology includes a particle storage device 10, a supply fluidized bed 20, a wind box 30, a fluidized bed heat exchanger 40, a separating fluidized bed 50, and an air supply device 60. The particle storage device 10 is used to store solid-phase particle media that have completed the cold release process or the cold storage process. The feed inlet of the supply fluidized bed 20 is connected to the discharge outlet of the particle storage device 10, and the supply fluidized bed 20 is used to fluidize the solid-phase medium particles within itself.

[0060] The air box 30 is connected to the bottom of the fluidized bed 20. The inlet of the fluidized bed heat exchanger 40 is connected to the outlet of the fluidized bed 20 via multiple pipelines. The fluidized bed heat exchanger 40 is used to exchange heat between the heat exchange fluid and the solid particulate medium. The inlet of the separating fluidized bed 50 is connected to the outlet of the fluidized bed heat exchanger 40, and the outlet of the separating fluidized bed 50 is connected to the inlet of the particle storage device 10. The separating fluidized bed 50 is used to collect the solid particulate medium that has completed the cooling release process or the cooling storage process. The air supply device 60 is connected to the outlet of the separating fluidized bed 50 and the inlet of the air box 30. The air supply device 60 is used to supply high-pressure air into the fluidized bed 20 through the air box 30.

[0061] The novel liquid air energy storage system based on fluidization technology provided by this invention offers high safety and simple operation due to the use of solid particulate media as the cold storage method. Furthermore, the type and size of the solid particulate media can be adjusted according to the required cold storage capacity. Since the heat exchange fluid does not directly contact the solid particulate media, its applicability is wider. This novel liquid air energy storage system based on fluidization technology of this invention has the advantages of high safety, simple operation, high cold storage efficiency, and wide applicability.

[0062] In one embodiment of the present invention, such as Figure 1 As shown, the bellows 30 is used to supply high-pressure airflow to the fluidized bed 20, enabling the solid particles within the fluidized bed 20 to be suspended in the airflow and form a fluidized state. The airflow velocity generated by the bellows 30 is one of the key parameters for achieving fluidization of the solid particles within the fluidized bed 20; the performance of the fluidized bed 20 is controlled by adjusting the operating parameters of the bellows 30. Because the temperature of the solid particles in the fluidized bed 20 is low, the bellows 30 needs to be made of materials resistant to low temperatures, corrosion, and abrasion, such as cryogenic alloys or stainless steel.

[0063] In one embodiment of the present invention, during the fluidization of solid medium particles, the concentration and flow rate of the solid medium particles entering the pipeline are controlled by adjusting the air velocity, thereby controlling the heat exchange efficiency and heat exchange rate between the heat exchange fluid and the solid medium. Multiple pipelines are provided, arranged at intervals. Preferably, the pipelines are expandable, i.e., multiple sections of pipes with different diameters are sequentially nested together. During operation, by controlling the length of the pipeline entering the fluidized bed 20, the distance between the pipeline port and the solid medium particles can be changed, similarly controlling the heat exchange efficiency and heat exchange rate between the heat exchange fluid and the solid medium.

[0064] In one embodiment of the present invention, such as Figure 1 As shown, the particle storage device 10 includes a high-temperature particle storage tank 11 and a low-temperature particle storage tank 12. The high-temperature particle storage tank 11 has an inlet at the top and an outlet at the bottom. The inlet of the high-temperature particle storage tank 11 is connected to the outlet of the separating fluidized bed 50, and the outlet of the high-temperature particle storage tank 11 is connected to the inlet of the fluidized bed 20. The high-temperature particle storage tank 11 is used to store the solid-phase particle medium that has completed the cooling process. The low-temperature particle storage tank 12 has an inlet at the top and an outlet at the bottom. The inlet of the low-temperature particle storage tank 12 is connected to the outlet of the separating fluidized bed 50, and the outlet of the low-temperature particle storage tank 12 is connected to the inlet of the fluidized bed 20. The low-temperature particle storage tank 12 is used to store the solid-phase particle medium that has completed the cooling process. Preferably, the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 are positioned above the fluidized bed 20, so that the solid particle medium inside the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 can automatically flow into the fluidized bed 20 by gravity, thereby reducing energy consumption.

[0065] In a preferred embodiment of the present invention, the cryogenic particle storage tank 12 is made of high-strength, low-temperature resistant materials, and the main body of the cryogenic particle storage tank 12 is made of high-strength materials such as stainless steel and quartz. To maintain the internal low-temperature state, the cryogenic particle storage tank 12 is provided with an insulation layer to reduce heat conduction; its outer surface or wall interlayer is wrapped or filled with insulation materials such as glass fiber, perlite, polymer foam resin, and asbestos for insulation. Preferably, the cryogenic particle storage tank 12 is typically equipped with safety facilities, such as pressure relief valves and temperature control systems, to ensure safe operation of the tank under any circumstances.

[0066] In a preferred embodiment of the present invention, the high-temperature particle storage tank 11 is made of a high-strength, low-temperature resistant material, while the main body of the low-temperature particle storage tank 12 is made of high-strength materials such as stainless steel and quartz. To maintain the internal temperature, the high-temperature particle storage tank 11 is provided with an insulation layer to reduce heat conduction. Its outer surface or wall interlayer is wrapped or filled with insulation materials such as glass fiber, perlite, polymer foam resin, and asbestos for insulation.

[0067] In one embodiment of the present invention, the solid-phase particulate medium is used to store or release cold energy, serving as a cold storage medium. It typically comprises small particles such as quartz sand particles, basalt particles, metal particles, polymer particles, or mixed particles. The selection of particle size is crucial to the performance of the fluidized bed heat exchanger 40. By selecting an appropriate particle size, higher heat transfer efficiency can be achieved.

[0068] In one embodiment of the present invention, the fluidized bed heat exchanger 40 is the core component of the cold storage system. The solid-phase particulate medium in the fluidized bed heat exchanger 40 is suspended under the action of gas or liquid, and this suspension state is used for heat exchange, increasing the heat exchange area and improving heat transfer efficiency. The fluidized bed heat exchanger 40 provides a heat exchange surface between the solid-phase particulate medium and the heat exchange fluid, through which heat is transferred from one fluid to another. The fluidized bed heat exchanger 40 can be tubular, plate-type, or other forms, determined according to actual needs. In this embodiment, the fluidized bed heat exchanger 40 is provided with an inlet and an outlet. The heat exchange fluid enters through the inlet and flows out through the outlet. In this embodiment, the heat exchange fluid is air, but other heat exchange fluids can also be used.

[0069] In one embodiment of the present invention, the separating fluidized bed 50 is a device for collecting solid particulate media. After the cold storage or cold release process is completed, the solid particulate media is collected in the separating fluidized bed 50. In the separating fluidized bed 50, the solid particulate media are divided into different layers under the action of gravity according to their density and size. Most of the heavier solid particulate media will sink to the bottom of the separating fluidized bed 50, while a small portion of the lighter solid particulate media will float to the top of the separating fluidized bed 50. The heavier particles accumulated at the bottom of the separating fluidized bed 50 will be further recycled and returned to the high-temperature particle storage tank 11 or the low-temperature particle storage tank 12.

[0070] In one embodiment of the present invention, such as Figure 1 As shown, the particle storage device 10 also includes a first diversion pipe 13. One end of the first diversion pipe 13 has a feed inlet, and the other end has two discharge outlets, namely a first discharge outlet and a second discharge outlet. The feed inlet of the first diversion pipe 13 is connected to the discharge outlet of the separating fluidized bed 50. The feed inlet of the high-temperature particle storage tank 11 is connected to the first discharge outlet of the first diversion pipe 13, and the feed inlet of the low-temperature particle storage tank 12 is connected to the second discharge outlet of the first diversion pipe 13. By adopting a structural design with one feed inlet and two discharge outlets, solid-phase particle media can be transported to the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 respectively through a single pipeline, which simplifies the pipeline structure and reduces production costs.

[0071] Preferably, the first diversion pipe 13 is inclined, and the height of one end of the first diversion pipe 13 is greater than the height of the other end. In this way, the solid particulate medium entering the first diversion pipe 13 can enter the high-temperature particulate storage tank 11 or the low-temperature particulate storage tank 12 under the action of gravity, without the need to set up a power conveying device, thus reducing the energy consumption of the equipment.

[0072] In one embodiment of the present invention, such as Figure 1 As shown, the particle storage device 10 also includes a second diversion pipe 14. One end of the second diversion pipe 14 has two inlets, namely a first inlet and a second inlet, and the other end has a discharge outlet. The first inlet of the second diversion pipe 14 is connected to the discharge outlet of the high-temperature particle storage tank 11, the second inlet of the second diversion pipe 14 is connected to the discharge outlet of the low-temperature particle storage tank 12, and the discharge outlet of the second diversion pipe 14 is connected to the inlet of the fluidized bed 20. By adopting a structure design with two inlets and one discharge outlet, solid-phase particle media from the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 can be transported to the fluidized bed 20 through a single pipeline, simplifying the pipeline structure and reducing production costs.

[0073] Preferably, the second diversion pipe 14 is inclined, and the height of one end of the second diversion pipe 14 is greater than the height of the other end. In this way, the solid particulate medium entering the second diversion pipe 14 can enter the fluidized bed 20 under the action of gravity, without the need to set up a power conveying device, thus reducing the energy consumption of the equipment.

[0074] In one embodiment of the present invention, such as Figure 1 As shown, the particle storage device 10 also includes a first control valve 15, a second control valve 16, a third control valve 17, and a fourth control valve 18. The first control valve 15 is located at the inlet of the high-temperature particle storage tank 11 and is used to control the opening or closing of the inlet. The second control valve 16 is located at the inlet of the low-temperature particle storage tank 12 and is used to control the opening or closing of the inlet. The third control valve 17 is located at the outlet of the high-temperature particle storage tank 11 and is used to control the opening or closing of the outlet. The fourth control valve 18 is located at the outlet of the low-temperature particle storage tank 12 and is used to control the opening or closing of the outlet. The first control valve 15, second control valve 16, third control valve 17, and fourth control valve 18 are all gate valves. However, the specific type of the control valves is not limited to this; other valves that allow the passage of solid particle media can also be used.

[0075] In one embodiment of the present invention, such as Figure 1As shown, the air supply device 60 includes an air supply duct 61 and a blower 62. One end of the air supply duct 61 is connected to the air outlet of the separated fluidized bed 50, and the other end of the air supply duct 61 is connected to the air inlet of the air box 30. The blower 62 is connected in series with the air supply duct 61. Specifically, the air inlet of the blower 62 is connected to the air outlet of the separated fluidized bed 50 through a section of the air supply duct 61, and the air outlet of the blower 62 is connected to the air inlet through another section of the air supply duct 61.

[0076] In a preferred embodiment of the invention, a blower 62 is used to supply gas (typically air or nitrogen) into the fluidized bed 20 to maintain the fluidized bed's operating state. The speed of the blower 62 is adjustable, thereby adjusting the gas velocity and flow rate. Different velocities and flow rates affect the flow state of particles within the fluidized bed 20, thus affecting the fluidized bed's performance. By supplying gas into the fluidized bed 20, the blower 62 fluidizes the particles within it. In this fluidized state, the gaps between the solid particles increase, and heat transfer within the bed becomes more efficient. Due to the fluidized state, the blower 62 can effectively mix and agitate the particles within the fluidized bed, resulting in more uniform parameters such as temperature within the fluidized bed. The blower 62 can be a centrifugal blower 62, an axial flow blower 62, or a mixed flow blower 62.

[0077] In one embodiment of the present invention, the air supply device 60 further includes a gas-solid separator 63, which is connected in series to the air supply pipe 61 between the blower 62 and the separation fluidized bed 50. The outlet of the gas-solid separator 63 is connected to the inlet of the high-temperature particle storage tank 11 through the first particulate matter circulation pipe 64, and the outlet of the gas-solid separator 63 is connected to the inlet of the low-temperature particle storage tank 12 through the second particulate matter circulation pipe 65.

[0078] In one embodiment of the invention, a gas-solid separator 63 is used to separate gas from solid particulate media. By separating the solid particulate media suspended in the gas, gas purification and solid particulate media recovery are achieved. The structural design of the gas-solid separator 63 typically needs to consider the separation efficiency of the solid particulate media and the minimum resistance to gas flow. The structure of the gas-solid separator 63 includes nozzles, cyclone separators, etc., to maximize separation efficiency. In large-scale cold storage systems, a multi-stage separation design is required to ensure efficient recovery of the solid particulate media and purification of the gas. Multiple gas-solid separators 63 are connected in series, each with different parameters. Since the particles in the fluidized bed are in a low-temperature state, the construction materials of the gas-solid separator 63 are typically selected to resist low temperatures, corrosion, and abrasion, such as cryogenic alloys or stainless steel.

[0079] In one embodiment of the present invention, the air supply device 60 further includes a first return material control valve 66 and a second return material control valve 67. The first return material control valve 66 is disposed in the first particulate matter circulation pipe 64 and is used to control the opening or closing of the first particulate matter circulation pipe 64. The second return material control valve 67 is disposed in the second particulate matter circulation pipe 65 and is used to control the opening or closing of the second particulate matter circulation pipe 65.

[0080] The working principle of this invention, a novel liquid air energy storage cold storage system based on fluidization technology:

[0081] (1) In the cooling mode: the first control valve 15, the fourth control valve 18 and the first return material control valve 66 are opened, and the second control valve 16, the third control valve 17 and the second return material control valve 67 are closed, so that the low-temperature solid particulate medium enters the supply fluidized bed 20 from the low-temperature particle tank; the blower 62 inputs airflow into the air box 30, the airflow fluidizes the solid particulate medium, and under the push of the airflow, the fluidized solid particulate medium enters the fluidized bed heat exchanger 40 to exchange heat with the air, so as to transfer the cold energy to the air. After the heat exchange is completed, the solid particulate medium enters the separation fluidized bed 50, and then enters the high-temperature particle storage tank 11 through the first diversion pipe 13. At the same time, the solid particulate medium in the airflow is separated in the gas-solid separator 63. The separated solid particulate medium enters the high-temperature particle storage tank 11 through the first particulate circulation pipe 64, while the purified airflow returns to the supply fluidized bed 20 through the air supply pipe 61.

[0082] (2) In the cold storage mode, the second control valve 16, the third control valve 17, and the second return material control valve 67 are opened, and the first control valve 15, the fourth control valve 18, and the first return material control valve 66 are closed. The air is reheated by the fluidized bed heat exchanger 40 in the cold storage system, and the cold energy in the air is stored in the solid particulate medium. The flow mode of the solid particulate medium in the cold storage system is the same as the flow direction mentioned above, except that the solid particulate medium eventually enters the low-temperature particulate storage tank 12.

[0083] This invention also provides a novel cold storage method for liquid air energy storage based on fluidization technology. The method is based on the novel cold storage system for liquid air energy storage based on fluidization technology described in any of the above embodiments, and includes:

[0084] The low-temperature solid-phase particulate medium is fed into the fluidized bed 20 through the low-temperature particulate storage tank 12.

[0085] The air supply device 60 delivers high-pressure air to the fluidized bed 20 through the air box 30, so that the solid particulate medium in the fluidized bed 20 enters the fluidized bed heat exchanger 40 in a fluidized state to exchange heat with the heat exchange fluid.

[0086] After heat exchange, the solid particulate medium enters the separation fluidized bed 50;

[0087] The solid-phase particulate medium in the fluidized bed 50 is separated and enters the high-temperature particulate storage tank 11;

[0088] or;

[0089] Solid-phase particulate media are fed into the fluidized bed 20 via a high-temperature particulate storage tank 11.

[0090] The air supply device 60 delivers high-pressure air to the fluidized bed 20 through the air box 30, so that the solid particulate medium in the fluidized bed 20 enters the fluidized bed heat exchanger 40 in a fluidized state to exchange heat with the heat exchange fluid.

[0091] After heat exchange, the low-temperature solid particulate medium enters the separation fluidized bed 50;

[0092] The solid-phase particulate media in the fluidized bed 50 enters the cryogenic particulate storage tank 12.

[0093] In one embodiment of the invention, the novel cold storage method for liquid air energy storage based on fluidization technology further includes:

[0094] The gas flow output from the separation fluidized bed 50 is separated by the gas-solid separator 63, and the first return material control valve 66 is opened so that the solid phase particle medium separated by the gas-solid separator 63 enters the high temperature particle storage tank 11.

[0095] or;

[0096] The gas flow output from the separation fluidized bed 50 is separated by the gas-solid separator 63, and the second return control valve 67 is opened so that the solid phase particle medium separated by the gas-solid separator 63 enters the low temperature particle storage tank 12.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel liquid air energy storage and cold storage system based on fluidization technology, characterized in that, include: Particle storage device (10), the particle storage device (10) is used to store solid particulate media that have completed the cold release process or the cold storage process. A fluidized bed (20) is supplied, the inlet of which is connected to the outlet of the particle storage device (10), and the fluidized bed (20) is used to fluidize the solid medium particles within itself. A bellows (30) is connected to the bottom of the fluidized bed (20); Fluidized bed heat exchanger (40), the feed port of the fluidized bed heat exchanger (40) is connected to the discharge port of the fluidized bed (20) through multiple pipelines, and the fluidized bed heat exchanger (40) is used to exchange heat between the heat exchange fluid and the solid particulate medium. A separating fluidized bed (50) is provided, wherein the inlet of the separating fluidized bed (50) is connected to the outlet of the fluidized bed heat exchanger (40), and the outlet of the separating fluidized bed (50) is connected to the inlet of the particle storage device (10); the separating fluidized bed (50) is used to collect the solid-phase particle medium that has completed the cold release process or the solid-phase particle medium that has completed the cold storage process. An air supply device (60) is connected to the air outlet of the separated fluidized bed (50) and the air inlet of the air box (30). The air supply device (60) is used to deliver high-pressure air to the supply fluidized bed (20) through the air box (30). The particle storage device (10) includes: A high-temperature particle storage tank (11) is provided, with its inlet connected to the outlet of the separating fluidized bed (50) and its outlet connected to the inlet of the supply fluidized bed (20). The high-temperature particle storage tank (11) is used to store the solid-phase particle medium that has completed the cooling process. The low-temperature particle storage tank (12) has its inlet connected to the outlet of the separation fluidized bed (50) and its outlet connected to the inlet of the supply fluidized bed (20). The low-temperature particle storage tank (12) is used to store the solid-phase particle medium that has completed the cold storage process.

2. The novel liquid air energy storage cold storage system based on fluidization technology according to claim 1, characterized in that, The particle storage device (10) further includes: The first diversion pipe (13) has its inlet connected to the outlet of the separated fluidized bed (50), the inlet of the high-temperature particle storage tank (11) is connected to the first outlet of the first diversion pipe (13), and the inlet of the low-temperature particle storage tank (12) is connected to the second outlet of the first diversion pipe (13).

3. The novel liquid air energy storage cold storage system based on fluidization technology according to claim 1, characterized in that, The particle storage device (10) further includes: The second diversion pipe (14) has its first inlet connected to the outlet of the high-temperature particle storage tank (11), its second inlet connected to the outlet of the low-temperature particle storage tank (12), and its outlet connected to the inlet of the fluidized bed (20).

4. The novel liquid air energy storage cold storage system based on fluidization technology according to any one of claims 1 to 3, characterized in that, The particle storage device (10) further includes: The first control valve (15) is located at the feed inlet of the high-temperature particle storage tank (11); The second control valve (16) is located at the inlet of the low-temperature particle storage tank (12); The third control valve (17) is located at the outlet of the high-temperature particle storage tank (11); The fourth control valve (18) is located at the outlet of the cryogenic particle storage tank (12).

5. The novel liquid air energy storage cold storage system based on fluidization technology according to any one of claims 1 to 3, characterized in that, The air supply device (60) includes: An air supply pipe (61) is provided, one end of which is connected to the air outlet of the separated fluidized bed (50), and the other end of which is connected to the air inlet of the air box (30). A blower (62) is connected in series with the air supply pipe (61).

6. The novel liquid air energy storage cold storage system based on fluidization technology according to claim 5, characterized in that, The air supply device (60) further includes: A gas-solid separator (63) is connected in series to the air supply pipe (61) between the blower (62) and the separation fluidized bed (50). The outlet of the gas-solid separator (63) is connected to the inlet of the high-temperature particle storage tank (11) through the first particle circulation pipe (64), and the outlet of the gas-solid separator (63) is connected to the inlet of the low-temperature particle storage tank (12) through the second particle circulation pipe (65).

7. The novel liquid air energy storage cold storage system based on fluidization technology according to claim 6, characterized in that, The air supply device (60) further includes: The first return material control valve (66) is located in the first particulate matter circulation pipe (64) and is used to control the opening or closing of the first particulate matter circulation pipe (64). The second return material control valve (67) is located in the second particulate matter circulation pipe (65) and is used to control the opening or closing of the second particulate matter circulation pipe (65).

8. A novel cold storage method for liquid air energy storage based on fluidization technology, the method being based on the novel cold storage system for liquid air energy storage based on fluidization technology as described in any one of claims 1 to 7, characterized in that, include: The low-temperature solid-phase particulate medium is fed into the fluidized bed (20) through the low-temperature particulate storage tank (12); The air supply device (60) delivers high-pressure air to the fluidized bed (20) through the air box (30) so that the solid particulate medium in the fluidized bed (20) enters the fluidized bed heat exchanger (40) in a fluidized state to exchange heat with the heat exchange fluid; After heat exchange, the solid particulate medium enters the separation fluidized bed (50). The solid-phase particulate medium in the separated fluidized bed (50) enters the high-temperature particulate storage tank (11). or; The solid-phase particulate medium is fed into the fluidized bed (20) through the high-temperature particulate storage tank (11); The air supply device (60) delivers high-pressure air to the fluidized bed (20) through the air box (30) so that the solid particulate medium in the fluidized bed (20) enters the fluidized bed heat exchanger (40) in a fluidized state to exchange heat with the heat exchange fluid. After heat exchange, the low-temperature solid particulate medium enters the separation fluidized bed (50). The solid-phase particulate medium in the separated fluidized bed (50) enters the cryogenic particulate storage tank (12).

9. The novel cold storage method for liquid air energy storage based on fluidization technology according to claim 8, characterized in that, Also includes: The gas flow output from the separation fluidized bed (50) is separated by a gas-solid separator (63), and the first return material control valve (66) is opened so that the solid phase particle medium separated by the gas-solid separator (63) enters the high temperature particle storage tank (11). or; The gas-solid separator (63) separates the gas flow output from the separation fluidized bed (50) and controls the second return control valve (67) to open so that the solid phase particle medium separated by the gas-solid separator (63) enters the low temperature particle storage tank (12).

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