Liquid air energy storage novel cold storage system and method based on fluidization technology

Abstract

The invention provides a liquid air energy storage novel cold storage system and method based on a fluidization technology, and relates to the technical field of energy storage. The cold storage system comprises a particle storage device, a supply fluidized bed, an air box, a fluidized bed heat exchanger, a separation fluidized bed and an air supply device. The particle storage device is used for storing solid-phase particle media completing the cold release process or solid-phase particle media completing the cold storage process. According to the liquid air energy storage novel cold storage system based on the fluidization technology, due to the fact that the solid-phase particle media are adopted as a cold storage mode, safety is high, operation is easy, and the type and size of the solid-phase particle media can be adjusted according to the requirement for the cold storage amount; the heat exchange fluid does not directly contact with the solid-phase particle medium for heat exchange, so that the application range is wider; the liquid air energy storage novel cold storage system based on the fluidization technology has the advantages of being high in safety, easy to operate, high in cold storage efficiency and wide in application range.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a new liquid air energy storage cold storage system and method based on fluidization technology. Background Art

[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. It is widely used in chemical, energy, environmental protection and other fields.

[0003] The new cold storage system of liquid air energy storage based on fluidization technology is based on the principle of fluidized heat exchange technology, making full use of the uniformity and efficient heat transfer performance of the fluidized bed to improve the efficiency of cold storage and heat exchange. The particles in the fluidized bed are fluidized under the action of the airflow, making the heat and mass transfer between the gas and particles in the bed more rapid and uniform, providing good conditions for solid phase cold storage, so that the liquid air energy storage system can operate more efficiently and stably during the charging and discharging process.

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

[0005] At present, liquid air energy storage often uses fixed packed bed solid phase cold storage and liquid phase cold storage as the main cold storage methods. Among them, fixed packed bed solid phase cold storage uses solid phase cold storage materials such as basalt and quartz sand, which has the advantages of low cost, green environmental protection, and good safety. However, this method cannot avoid the occurrence of the thermocline effect and the cold storage efficiency is low; liquid phase cold storage usually uses hydrocarbon materials such as methanol and propane, which will not have the thermocline effect, have fast heat transfer and high cold storage efficiency. However, the liquid phase cold storage working fluids in the deep low temperature zone that meet the working conditions are mostly flammable and explosive substances, and are expensive, which greatly limits its application scope. Summary of the invention

[0006] The present invention provides a new liquid air energy storage cold storage system based on fluidization technology, which is used to solve the problems of the existing new liquid air energy storage cold storage system based on fluidization technology, such as the thermocline effect, poor safety and low cold storage efficiency.

[0007] The present invention provides a new liquid air energy storage cold storage system based on fluidization technology, comprising: A particle storage device, wherein the particle storage device is used to store 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; A supply fluidized bed, wherein the feed port of the supply fluidized bed is connected to the discharge port of the particle storage device, and the supply fluidized bed is used to fluidize the solid phase medium particles inside the supply fluidized bed; a wind box in communication with a bottom portion of the supply fluidized bed; A fluidized bed heat exchanger, wherein the feed port of the fluidized bed heat exchanger is connected to the discharge port of the fluidized bed through a plurality of pipelines, and the fluidized bed heat exchanger is used to exchange heat between the heat exchange fluid and the solid-phase particle medium; A separation fluidized bed, wherein the feed port of the separation fluidized bed is communicated with the discharge port of the fluidized bed heat exchanger, and the discharge port of the separation fluidized bed is communicated with the feed port of the particle storage device; the separation 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; An air supply device is connected to the air outlet of the separation fluidized bed and the air inlet of the wind box, and is used to transport high-pressure air to the supply fluidized bed through the wind box.

[0008] According to a new liquid air energy storage cold storage system based on fluidization technology provided by the present invention, the particle storage device includes: A high-temperature particle storage tank, wherein the feed port of the high-temperature particle storage tank is connected to the discharge port of the separation fluidized bed, the discharge port of the high-temperature particle storage tank is connected to the feed port 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; A low-temperature particle storage tank, wherein the feed port of the low-temperature particle storage tank is connected to the discharge port of the separation fluidized bed, the discharge port of the low-temperature particle storage tank is connected to the feed port of the supply fluidized bed, and the low-temperature particle storage tank is used to store the solid-phase particle medium that completes the cold storage process.

[0009] According to a new liquid air energy storage cold storage system based on fluidization technology provided by the present invention, the particle storage device also includes: A first shunt pipe, the feed port of the first shunt pipe is connected to the discharge port of the separation fluidized bed, the feed port of the high-temperature particle storage tank is connected to the first discharge port of the first shunt pipe, and the feed port of the low-temperature particle storage tank is connected to the second discharge port of the first shunt pipe.

[0010] According to a new liquid air energy storage cold storage system based on fluidization technology provided by the present invention, the particle storage device also includes: A second shunt pipe, the first feed port of the second shunt pipe is connected to the discharge port of the high-temperature particle storage tank, the second feed port of the second shunt pipe is connected to the discharge port of the low-temperature particle storage tank, and the discharge port of the second shunt pipe is connected to the feed port of the fluidized bed.

[0011] According to a new liquid air energy storage cold storage system based on fluidization technology provided by the present invention, the particle storage device also includes: A first control valve is arranged at the feed inlet of the high-temperature particle storage tank; A second control valve is arranged at the feed port of the cryogenic particle storage tank; A third control valve is arranged at the discharge port of the high-temperature particle storage tank; The fourth control valve is arranged at the discharge port of the low-temperature particle storage tank.

[0012] According to a new liquid air energy storage cold storage system based on fluidization technology provided by the present invention, the air supply device includes: an air supply pipe, one end of which is connected to the air outlet of the separation fluidized bed, and the other end of which is connected to the air inlet of the wind box; A blower is connected in series to the air supply pipe.

[0013] According to a new type of liquid air energy storage cold storage system based on fluidization technology provided by the present invention, the air supply device also includes: A gas-solid separator, the gas-solid separator is connected in series to the air supply pipe between the blower and the separation fluidized bed, the discharge port of the gas-solid separator is connected to the feed port of the high-temperature particle storage tank through a first particle circulation pipe, and the discharge port of the gas-solid separator is connected to the feed port of the low-temperature particle storage tank through a second particle circulation pipe.

[0014] According to a new type of liquid air energy storage cold storage system based on fluidization technology provided by the present invention, the air supply device also includes: a first material return control valve, the first material return control valve being arranged on the first particle circulation pipe, and the first material return control valve being used to control the first particle circulation pipe to be turned on or off; The second material return control valve is arranged on the second particle circulation pipe, and the second material return control valve is used to control the conduction or closing of the second particle circulation pipe.

[0015] The present invention also provides a new liquid air energy storage cold storage method based on fluidization technology, the method is based on any of the above-mentioned new liquid air energy storage cold storage systems based on fluidization technology, comprising: The low-temperature solid-phase particle medium is fed into the fluidized bed through a low-temperature particle storage tank; The air supply device delivers high-pressure air to the supply fluidized bed through a wind box, so that the solid-phase particle medium in the supply fluidized bed enters the fluidized bed heat exchanger in a fluidized state to exchange heat with the heat exchange fluid; The solid phase particle medium after heat exchange enters the separation fluidized bed; The solid-phase particle medium in the separation fluidized bed enters the high-temperature particle storage tank; or; Inputting the solid phase particle medium into the supply fluidized bed through the high temperature particle storage tank; The air supply device delivers high-pressure air to the supply fluidized bed through the wind box, so that the solid-phase particle medium in the supply fluidized bed enters the fluidized bed heat exchanger in a fluidized state to exchange heat with the heat exchange fluid; After heat exchange, the low-temperature solid-phase particle medium enters the separation fluidized bed; The solid-phase particle medium in the separation fluidized bed enters the low-temperature particle storage tank.

[0016] According to the present invention, a new liquid air energy storage cold storage method based on fluidization technology also includes: The gas flow outputted from the separation fluidized bed is separated by a gas-solid separator, and the first return material control valve is controlled to open so that the solid phase particle medium separated by the gas-solid separator enters the high-temperature particle storage tank; or; The gas-solid separator is used to separate the gas flow output from the separation fluidized bed, and the second return material control valve is controlled to open so that the solid-phase particle medium separated by the gas-solid separator enters the low-temperature particle storage tank.

[0017] The new liquid air energy storage cold storage system based on fluidization technology provided by the present invention has high safety and simple operation because it adopts solid-phase granular medium as the cold storage method, and the type and size of the solid-phase granular medium can be adjusted according to the demand for cold storage; since the heat exchange fluid and the solid-phase granular medium are not in direct contact for heat exchange, the scope of application is wider; the new liquid air energy storage cold storage system based on fluidization technology of the present invention has the advantages of high safety, simple operation, high cold storage efficiency and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a new liquid air energy storage cold storage system based on fluidization technology provided by the present invention.

[0020] Reference numerals: 10. Particle storage device; 11. High-temperature particle storage tank; 12. Low-temperature particle storage tank; 13. First shunt pipe; 14. Second shunt pipe; 15. First control valve; 16. Second control valve; 17. Third control valve; 18. Fourth control valve; 20. Supply fluidized bed; 30. Bellows; 40. Fluidized bed heat exchanger; 50. Separation 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 DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and 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 devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] Combine the following Figure 1 The specific structure and working principle of the new liquid air energy storage cold storage system based on fluidization technology of the present invention are described.

[0027] like Figure 1 As shown, the new liquid air energy storage cold 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 separation 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 solid-phase particle media that have completed the cold storage process. The feed port of the supply fluidized bed 20 is connected to the discharge port of the particle storage device 10, and the supply fluidized bed 20 is used to fluidize the solid-phase medium particles inside itself.

[0028] The wind box 30 is connected to the bottom of the supply fluidized bed 20, and the feed port of the fluidized bed heat exchanger 40 is connected to the discharge port of the supply fluidized bed 20 through multiple pipelines. The fluidized bed heat exchanger 40 is used to exchange heat between the heat exchange fluid and the solid-phase granular medium. The feed port of the separation fluidized bed 50 is connected to the discharge port of the fluidized bed heat exchanger 40, and the discharge port of the separation fluidized bed 50 is connected to the feed port of the particle storage device 10; the separation fluidized bed 50 is used to collect the solid-phase granular medium that has completed the cold release process or the solid-phase granular medium that has completed the cold storage process. The air supply device 60 is connected to the air outlet of the separation fluidized bed 50 and the air inlet of the wind box 30, and the air supply device 60 is used to deliver high-pressure air to the supply fluidized bed 20 through the wind box 30.

[0029] The new liquid air energy storage cold storage system based on fluidization technology provided by the present invention has high safety and simple operation because it adopts solid-phase granular medium as the cold storage method, and the type and size of the solid-phase granular medium can be adjusted according to the demand for cold storage; since the heat exchange fluid and the solid-phase granular medium are not in direct contact for heat exchange, the scope of application is wider; the new liquid air energy storage cold storage system based on fluidization technology of the present invention has the advantages of high safety, simple operation, high cold storage efficiency and a wide range of applications.

[0030] In one embodiment of the present invention, Figure 1 As shown, the bellows 30 is used to provide a high-pressure airflow to the supply fluidized bed 20, so that the solid-phase granular medium in the supply fluidized bed 20 can be suspended in the airflow to form a fluidized state. The airflow velocity generated by the bellows 30 is one of the key parameters for the solid-phase granular medium in the supply fluidized bed 20 to achieve fluidization. The performance of the supply fluidized bed 20 is controlled by adjusting the working parameters of the bellows 30. Since the temperature of the solid-phase medium particles in the supply fluidized bed 20 is relatively low, the bellows 30 needs to be made of a material that can resist low temperature, corrosion and wear, such as a low-temperature resistant alloy or stainless steel.

[0031] In one embodiment of the present invention, during the fluidization of solid-phase medium particles, the concentration and flow rate of solid-phase medium particles entering the pipeline are controlled by adjusting the wind speed, thereby controlling the heat exchange efficiency and heat exchange rate between the heat exchange fluid and the solid-phase particle medium. A plurality of pipelines are provided, and the plurality of pipelines are arranged at intervals. Preferably, the pipeline is a telescopic pipe, that is, the pipeline is a plurality of sections of pipelines of different diameters arranged together in sequence. During operation, by controlling the length of the pipeline entering the supply fluidized bed 20, the distance between the port of the pipeline and the solid-phase medium particles can be changed, and the heat exchange efficiency and heat exchange rate between the heat exchange fluid and the solid-phase particle medium can also be controlled.

[0032] In one embodiment of the present invention, Figure 1As 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 is provided with a feed port at the top and a discharge port at the bottom. The feed port of the high-temperature particle storage tank 11 is connected to the discharge port of the separation fluidized bed 50, and the discharge port of the high-temperature particle storage tank 11 is connected to the feed port 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 cold release process. The low-temperature particle storage tank 12 is provided with a feed port at the top and a discharge port at the bottom. The feed port of the low-temperature particle storage tank 12 is connected to the discharge port of the separation fluidized bed 50, and the discharge port of the low-temperature particle storage tank 12 is connected to the feed port 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. Preferably, the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 are arranged above the supply fluidized bed 20, so that the solid-phase particle medium inside the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 can automatically flow into the supply fluidized bed 20 by gravity, reducing energy consumption.

[0033] 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 material of the cryogenic particle storage tank 12 is made of high-strength materials such as stainless steel and quartz. In order to maintain the internal low temperature state, the cryogenic particle storage tank 12 is provided with an insulation layer to reduce the conduction of heat, and its outer side or wall interlayer is wrapped or filled with insulation materials such as glass fiber, pearl sand, polymer foam resin, asbestos, etc. for insulation. Preferably, the cryogenic particle storage tank 12 is usually equipped with safety facilities, such as a pressure release valve, a temperature control system, etc., to ensure that the storage tank can be safely operated under any circumstances.

[0034] In a preferred embodiment of the present invention, the high-temperature particle storage tank 11 is made of high-strength, low-temperature resistant materials, and the main body material of the low-temperature particle storage tank 12 is made of high-strength materials such as stainless steel and quartz. In order to maintain the internal temperature state, the high-temperature particle storage tank 11 is provided with an insulation layer to reduce heat conduction, and its outer side or wall interlayer is wrapped or filled with insulation materials such as glass fiber, pearl sand, polymer foam resin, asbestos, etc. for insulation.

[0035] In one embodiment of the present invention, the solid granular medium is used to store or release cold energy, and is a cold storage medium, which generally adopts tiny particles such as quartz sand particles, basalt particles, metal particles, polymer particles, mixed particles, etc. The size selection of particles is crucial to the performance of the fluidized bed heat exchanger 40. By selecting an appropriate particle size, a higher heat transfer efficiency can be achieved.

[0036] 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 particle medium in the fluidized bed heat exchanger 40 forms a suspended state under the action of gas or liquid. This state is used for heat exchange, which increases the heat exchange area and improves the heat transfer efficiency. The fluidized bed heat exchanger 40 is used to provide a heat exchange surface for the solid-phase particle medium and the heat exchange fluid. Through the heat exchange surface, heat is transferred from one fluid to another. The fluidized bed heat exchanger 40 can be in the form of a tube, a plate or other form, which is 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 it can also be other heat exchange fluids.

[0037] In one embodiment of the present invention, the separation fluidized bed 50 is a device for collecting solid-phase granular media. When the cold storage process or the cold release process is completed, the solid-phase granular media is collected in the separation fluidized bed 50. In the separation fluidized bed 50, according to the density and size of the solid-phase granular media, the solid-phase granular media are divided into different layers under the action of gravity. Most of the heavy solid-phase granular media will sink to the bottom of the separation fluidized bed 50, while a small part of the light solid-phase granular media will float to the top of the separation fluidized bed 50. The heavier particles accumulated at the bottom of the separation fluidized bed 50 will be further recovered and returned to the high-temperature particle storage tank 11 or the low-temperature particle storage tank 12.

[0038] In one embodiment of the present invention, Figure 1 As shown, the particle storage device 10 further includes a first shunt pipe 13, one end of which is provided with a feed port, and the other end of which is provided with two discharge ports, namely, a first discharge port and a second discharge port. The feed port of the first shunt pipe 13 is communicated with the discharge port of the separation fluidized bed 50, the feed port of the high-temperature particle storage tank 11 is communicated with the first discharge port of the first shunt pipe 13, and the feed port of the low-temperature particle storage tank 12 is communicated with the second discharge port of the first shunt pipe 13. By adopting a structural design of one feed port and two discharge ports, it is realized that the solid-phase particle medium is transported to the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 respectively through one pipeline, which simplifies the pipeline structure and reduces the production cost.

[0039] 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, so that the solid-phase particle medium entering the first diversion pipe 13 can enter the high-temperature particle storage tank 11 or the low-temperature particle storage tank 12 under the action of gravity, without the need to set up a power transmission device, thereby reducing the energy consumption of the equipment.

[0040] In one embodiment of the present invention, Figure 1As shown, the particle storage device 10 further includes a second shunt pipe 14, one end of which is provided with two feed ports, namely a first feed port and a second feed port, and the other end is provided with a discharge port, the first feed port of the second shunt pipe 14 is communicated with the discharge port of the high-temperature particle storage tank 11, the second feed port of the second shunt pipe 14 is communicated with the discharge port of the low-temperature particle storage tank 12, and the discharge port of the second shunt pipe 14 is communicated with the feed port of the supply fluidized bed 20. By adopting the structural design of two feed ports and one discharge port, it is achieved that the solid-phase particle medium in the high-temperature particle storage tank 11 and the low-temperature particle storage tank 12 can be respectively transported to the supply fluidized bed 20 through one pipeline, which simplifies the pipeline structure and reduces the production cost.

[0041] Preferably, the second diverter pipe 14 is inclined, and the height of one end of the second diverter pipe 14 is greater than the height of the other end, so that the solid phase particle medium entering the second diverter pipe 14 can enter the supply fluidized bed 20 under the action of gravity, without the need to set up a power transmission device, thereby reducing the energy consumption of the equipment.

[0042] In one embodiment of the present invention, 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 arranged at the feed port of the high-temperature particle storage tank 11, and the first control valve 15 is used to control the feed port of the high-temperature particle storage tank 11 to be opened or closed. The second control valve 16 is arranged at the feed port of the low-temperature particle storage tank 12, and the second control valve 16 is used to control the feed port of the low-temperature particle storage tank 12 to be opened or closed. The third control valve 17 is arranged at the discharge port of the high-temperature particle storage tank 11, and the third control valve 17 is used to control the discharge port of the high-temperature particle storage tank 11 to be opened or closed. The fourth control valve 18 is arranged at the discharge port of the low-temperature particle storage tank 12, and the fourth control valve 18 is used to control the discharge port of the low-temperature particle storage tank 12 to be opened or closed. The first control valve 15, the second control valve 16, the third control valve 17 and the fourth control valve 18 are all gate valves. Of course, the specific types of the above control valves are not limited thereto, and can also be other valves that allow solid-phase particle media to pass through.

[0043] In one embodiment of the present invention, Figure 1 As shown, the air supply device 60 includes an air supply pipe 61 and a blower 62, one end of the air supply pipe 61 is connected to the air outlet of the separation fluidized bed 50, the other end of the air supply pipe 61 is connected to the air inlet of the wind box 30, and the blower 62 is connected in series to the air supply pipe 61. Specifically, the air inlet of the blower 62 is connected to the air outlet of the separation fluidized bed 50 through a section of the air supply pipe 61, and the air outlet of the blower 62 is connected to the air inlet through another section of the air supply pipe 61.

[0044] In a preferred embodiment of the present invention, the blower 62 is used to supply gas (usually air or nitrogen) to the supply fluidized bed 20 to maintain the operating state of the fluidized bed. The speed of the blower 62 can be adjusted to adjust the flow rate and flow rate of the gas. Different flow rates and flow rates affect the flow state of the particles in the supply fluidized bed 20, thereby affecting the performance of the fluidized bed. The blower 62 inputs gas to the supply fluidized bed 20 so that the particles in the supply fluidized bed 20 are in a fluidized state. In this state, the gap between the solid phase particle medium increases, and the heat transfer in the bed is more efficient. Due to the existence of the fluidized state, the blower 62 can effectively mix and stir the particles in the fluidized bed, so that the parameters such as the temperature in the fluidized bed are more uniform. The blower 62 can be a centrifugal blower 62, an axial flow blower 62 or a mixed flow blower 62.

[0045] In one embodiment of the present invention, the air supply device 60 also 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, and the outlet of the gas-solid separator 63 is connected to the feed port 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 feed port of the low-temperature particle storage tank 12 through the second particle circulation pipe 65.

[0046] In one embodiment of the present invention, the gas-solid separator 63 is used to separate the gas from the solid particle medium. By separating the solid particle medium suspended in the gas, the gas is purified and the solid particle medium is recovered. The structural design of the gas-solid separator 63 usually needs to consider the separation efficiency of the solid particle medium and the minimum resistance of the gas flow. The structure of the gas-solid separator 63 includes a nozzle, a cyclone separator, etc., to maximize the separation efficiency. In a large-scale cold storage system, a multi-stage separation design is required to ensure efficient recovery of the solid phase particle medium and purification of the gas. By using a plurality of gas-solid separators 63 connected in series, each gas-solid separator 63 has different parameters. Since the particles in the fluidized bed will exist in a low-temperature state, the construction material of the gas-solid separator 63 is usually selected to be resistant to low temperature, corrosion and wear, such as low-temperature resistant alloys or stainless steel.

[0047] 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 particle circulation pipe 64, and the first return material control valve 66 is used to control the first particle circulation pipe 64 to be turned on or off. The second return material control valve 67 is disposed in the second particle circulation pipe 65, and the second return material control valve 67 is used to control the second particle circulation pipe 65 to be turned on or off.

[0048] The working principle of the new liquid air energy storage cold storage system based on fluidization technology of the present invention is as follows: (1) In the cold release mode: the first control valve 15, the fourth control valve 18 and the first return control valve 66 are controlled to open, and the second control valve 16, the third control valve 17 and the second return control valve 67 are controlled to close, so that the low-temperature solid-phase granular medium enters the supply fluidized bed 20 from the low-temperature granular tank; the blower 62 inputs airflow into the bellows 30, and the airflow fluidizes the solid-phase granular medium. Under the impetus of the airflow, the fluidized solid-phase granular medium enters the fluidized bed heat exchanger 40 to exchange heat with the air to transfer cold energy to the air. After the heat exchange, the solid-phase granular medium enters the separation fluidized bed 50, and then enters the high-temperature granular storage tank 11 through the first diverter pipe 13. At the same time, the solid-phase granular medium in the airflow is separated in the gas-solid separator 63, and the separated solid-phase granular medium enters the high-temperature granular storage tank 11 through the first granular circulation pipe 64, and the purified airflow returns to the supply fluidized bed 20 through the air supply pipe 61.

[0049] (2) In the cold storage mode, the second control valve 16, the third control valve 17 and the second return control valve 67 are controlled to be open, and the first control valve 15, the fourth control valve 18 and the first return control valve 66 are controlled to be 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-phase particle medium. The flow mode of the solid-phase particle medium in the cold storage system is the same as the above-mentioned flow direction, except that the solid-phase particle medium finally enters the low-temperature particle storage tank 12.

[0050] The present invention also provides a new liquid air energy storage cold storage method based on fluidization technology, the method is based on the new liquid air energy storage cold storage system based on fluidization technology described in any one of the above embodiments, comprising: The low-temperature solid-phase particle medium is fed into the fluidized bed 20 through the low-temperature particle storage tank 12; The air supply device 60 delivers high-pressure air to the supply fluidized bed 20 through the wind box 30, so that the solid-phase particle medium in the supply fluidized bed 20 enters the fluidized bed heat exchanger 40 in a fluidized state to exchange heat with the heat exchange fluid; The solid phase particle medium after heat exchange enters the separation fluidized bed 50; The solid phase particle medium in the separation fluidized bed 50 enters the high temperature particle storage tank 11; or; The solid phase particle medium is fed into the fluidized bed 20 through the high temperature particle storage tank 11; The air supply device 60 delivers high-pressure air to the supply fluidized bed 20 through the wind box 30, so that the solid-phase particle medium in the supply 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-phase particle medium enters the separation fluidized bed 50; The solid-phase particle medium in the separation fluidized bed 50 enters the low-temperature particle storage tank 12 .

[0051] In one embodiment of the invention, the new cold storage method of liquid air energy storage based on fluidization technology also includes: The gas-solid separator 63 separates the gas flow output from the separation fluidized bed 50, and the first return control valve 66 is controlled to open, 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 the second return control valve 67 is controlled to open, so that the solid-phase particle medium separated by the gas-solid separator 63 enters the low-temperature particle storage tank 12 .

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of liquid air energy storage cold storage system based on fluidization technology, characterized in that: include: A particle storage device (10), wherein the particle storage device (10) is used to store a solid-phase particle medium that has completed a cold release process or a solid-phase particle medium that has completed a cold storage process; A supply fluidized bed (20), wherein a feed port of the supply fluidized bed (20) is connected to a discharge port of the particle storage device (10), and the supply fluidized bed (20) is used to fluidize the solid phase medium particles inside the supply fluidized bed; a wind box (30), the wind box (30) being in communication with the bottom of the supply fluidized bed (20); a fluidized bed heat exchanger (40), wherein the feed port of the fluidized bed heat exchanger (40) is connected to the discharge port of the supply fluidized bed (20) through a plurality of pipelines, and the fluidized bed heat exchanger (40) is used to perform heat exchange between the heat exchange fluid and the solid-phase particle medium; A separation fluidized bed (50), wherein the feed port of the separation fluidized bed (50) is communicated with the discharge port of the fluidized bed heat exchanger (40), and the discharge port of the separation fluidized bed (50) is communicated with the feed port of the particle storage device (10); the separation 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), the air supply device (60) being in communication with an air outlet of the separation fluidized bed (50) and an air inlet of the wind box (30), the air supply device (60) being used to deliver high-pressure air to the supply fluidized bed (20) through the wind box (30).

2. According to claim 1, the new liquid air energy storage cold storage system based on fluidization technology is characterized in that: The particle storage device (10) comprises: A high-temperature particle storage tank (11), wherein the feed port of the high-temperature particle storage tank (11) is connected to the discharge port of the separation fluidized bed (50), and the discharge port of the high-temperature particle storage tank (11) is connected to the feed port of the supply fluidized bed (20), and the high-temperature particle storage tank (11) is used to store the solid-phase particle medium that has completed the cooling process; A low-temperature particle storage tank (12), wherein the feed port of the low-temperature particle storage tank (12) is connected to the discharge port of the separation fluidized bed (50), and the discharge port of the low-temperature particle storage tank (12) is connected to the feed port of the supply fluidized bed (20), and the low-temperature particle storage tank (12) is used to store the solid-phase particle medium that has completed the cold storage process.

3. The new liquid air energy storage cold storage system based on fluidization technology according to claim 2 is characterized in that: The particle storage device (10) further comprises: A first branch pipe (13), wherein the feed port of the first branch pipe (13) is connected to the discharge port of the separation fluidized bed (50), the feed port of the high-temperature particle storage tank (11) is connected to the first discharge port of the first branch pipe (13), and the feed port of the low-temperature particle storage tank (12) is connected to the second discharge port of the first branch pipe (13).

4. The new liquid air energy storage cold storage system based on fluidization technology according to claim 2 is characterized in that: The particle storage device (10) further comprises: A second shunt pipe (14), wherein a first feed port of the second shunt pipe (14) is connected to a discharge port of the high-temperature particle storage tank (11), a second feed port of the second shunt pipe (14) is connected to a discharge port of the low-temperature particle storage tank (12), and a discharge port of the second shunt pipe (14) is connected to a feed port of the fluidized bed (20).

5. The new liquid air energy storage cold storage system based on fluidization technology according to any one of claims 2 to 4, characterized in that: The particle storage device (10) further comprises: A first control valve (15) is arranged at the feed inlet of the high-temperature particle storage tank (11); a second control valve (16), arranged at the feed inlet of the low-temperature particle storage tank (12); a third control valve (17), arranged at the discharge port of the high-temperature particle storage tank (11); A fourth control valve (18) is arranged at the discharge port of the low-temperature particle storage tank (12).

6. The new liquid air energy storage cold storage system based on fluidization technology according to any one of claims 2 to 4, characterized in that: The air supply device (60) comprises: an air supply pipe (61), one end of the air supply pipe (61) being in communication with an air outlet of the separation fluidized bed (50), and the other end of the air supply pipe (61) being in communication with an air inlet of the wind box (30); A blower (62), the blower (62) is connected in series to the air supply pipe (61).

7. The new liquid air energy storage cold storage system based on fluidization technology according to claim 6 is characterized in that: The air supply device (60) further comprises: A gas-solid separator (63), the 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 discharge port of the gas-solid separator (63) is connected to the feed port of the high-temperature particle storage tank (11) through a first particle circulation pipe (64), and the discharge port of the gas-solid separator (63) is connected to the feed port of the low-temperature particle storage tank (12) through a second particle circulation pipe (65).

8. The new liquid air energy storage cold storage system based on fluidization technology according to claim 7 is characterized in that: The air supply device (60) further comprises: a first material return control valve (66), the first material return control valve (66) being arranged on the first particle circulation pipe (64), the first material return control valve (66) being used to control the opening or closing of the first particle circulation pipe (64); A second material return control valve (67), wherein the second material return control valve (67) is arranged on the second particle circulation pipe (65), and the second material return control valve (67) is used to control the opening or closing of the second particle circulation pipe (65).

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

10. The novel cold storage method of liquid air energy storage based on fluidization technology according to claim 9 is characterized in that: Also includes: The gas-solid separator (63) is used to separate the gas flow output from the separation fluidized bed (50), and the first return control valve (66) is controlled to open, 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 the second return control valve (67) is controlled 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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