A fluidized bed heat storage and release system and a fluidized bed heat storage and release method

Abstract

An embodiment of the present invention provides a fluidized bed heat storage and release system and a fluidized bed heat storage and release method. The fluidized bed heat storage and release system includes a heat supply module, a heat storage module, a fluidized bed, a first storage tank, a second storage tank, a heating module partially disposed in the fluidized bed cavity, and a heat energy application module partially disposed in the fluidized bed cavity. The heat energy application module includes a water delivery pipeline partially disposed in the fluidized bed cavity. The heat exchange pipeline in the fluidized bed includes a first interface at the top and a second interface at the bottom. One end of the first interface is connected to the third interface at the top of the first storage tank through a circulation pipeline, and the other end is connected to the fifth interface at the top of the second storage tank through a circulation pipeline. One end of the second interface is connected to the outlet of the heat storage module through a circulation pipeline, and the other end is connected to the fourth interface at the bottom of the first storage tank through a circulation pipeline. The sixth interface at the bottom of the second storage tank is connected to the heat storage module through a circulation pipeline. It realizes ultra-high temperature energy storage of solid energy storage particles and overcomes the disadvantages of molten salt heat storage.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and particularly to a fluidized bed heat storage and release system and a fluidized bed heat storage and release method. Background Art

[0002] As a type of sensible heat energy storage, molten salt energy storage is currently approaching the completion of the development stage and is in the stage of large-scale promotion. Due to the excellent properties of molten salt, it has great advantages in the field of medium and high temperature steam supply. However, there are still problems when it is applied to tower power generation systems: First, due to the instability of molten salt, thermal decomposition reactions are prone to occur at high temperatures, and the maximum operating temperature cannot meet the requirements of future advanced high-temperature solar thermal power generation (800 - 1000°C), and it is difficult to achieve ultra-high temperature heat storage; second, the freezing point of molten salt is high, it is easy to solidify at low temperatures, and it is easy to block pipelines, restricting the operating temperature range, and the viscosity changes with temperature, increasing the pumping power. Summary of the Invention

[0003] In view of the above problems, a fluidized bed heat storage and release system and a fluidized bed heat storage and release method are proposed to overcome or at least partially solve the above problems, including:

[0004] A fluidized bed heat storage and release system, the fluidized bed heat storage and release system includes a heat supply module, a heat storage module connected to the heat supply module, a fluidized bed connected to the heat storage module through a circulation pipeline, a first storage tank for storing first energy storage particles, a second storage tank for storing first energy storage particles, a heating module partially placed in the fluidized bed cavity, and a heat energy application module partially placed in the fluidized bed cavity. The heat energy application module includes a water delivery pipeline partially placed in the fluidized bed cavity. The heat exchange pipeline in the fluidized bed includes a first interface at the top and a second interface at the bottom. One end of the first interface is connected to the third interface at the top of the first storage tank through the circulation pipeline, and the other end is connected to the fifth interface at the top of the second storage tank through the circulation pipeline. One end of the second interface is connected to the outlet of the heat storage module through the circulation pipeline, and the other end is connected to the fourth interface at the bottom of the first storage tank through the circulation pipeline. The sixth interface at the bottom of the second storage tank is connected to the heat storage module through the circulation pipeline. The first energy storage particles are transported in the circulation pipeline, the fluidized bed is filled with second energy storage particles, and the temperature of the first energy storage particles in the first storage tank is higher than the temperature of the first energy storage particles in the second storage tank, where:

[0005] The heat supply module is used to collect energy and convert the collected energy into heat energy;

[0006] The heat storage module is used to heat the first energy storage particles in the circulation pipeline with the heat energy of the heat supply module;

[0007] The heating module is used to heat the first energy storage particles after being heated by the heat storage module during the energy storage stage;

[0008] The thermal energy application module is used to heat the water in the water delivery pipeline to generate steam by using the first energy storage particles transported from the first storage tank to the fluidized bed during the heat release stage.

[0009] Optionally, circulating air is passed through the circulation pipeline, and a first separator is provided on the circulation pipeline connecting the third interface of the first storage tank and the first interface of the fluidized bed. The third interface of the first storage tank is connected to the sixth interface of the second storage tank through the circulation pipeline;

[0010] The first separator is used to separate the circulating air and the first energy storage particles after heating, so that the separated first energy storage particles are stored in the first storage tank, and the first energy storage particles output from the second storage tank are transported to the heat storage module through the circulating air.

[0011] Optionally, a second separator is provided on the circulation pipeline connecting the fifth interface of the second storage tank and the fluidized bed. The fourth interface of the first storage tank is connected to the fifth interface of the second storage tank through the circulation pipeline;

[0012] The second separator is used to separate the circulating air and the first energy storage particles after temperature reduction, so that the separated first energy storage particles are stored in the second storage tank, and the first energy storage particles output from the first storage tank are transported to the fluidized bed through the circulating air.

[0013] Optionally, the energy collected by the heat supply module includes any one of the following:

[0014] Light energy, wind energy, valley electricity.

[0015] Optionally, the thermal energy application module further includes a steam power generation unit, and the steam power generation unit is used to generate steam power by using the generated steam.

[0016] Optionally, the thermal energy application module is further used to transport the generated steam to the heating pipeline or steam users.

[0017] Optionally, the heating module is heated by an electric heating method.

[0018] Optionally, the melting point of the first energy storage particles is higher than 3000 °C.

[0019] Optionally, the fluidized bed is connected to a blower, and the blower is used to blow air into the fluidized bed during the heat release stage.

[0020] A method for storing and releasing heat in a fluidized bed, applied to the fluidized bed heat storage and release system as described above, the method includes:

[0021] The described heat supply module is used to collect energy and convert the collected energy into heat energy;

[0022] The heat energy is heated and transported to the heat storage module to heat the first energy storage particles transported from the second storage tank to the heat storage module in the circulation pipeline;

[0023] In the fluidized bed, the heating module is used to heat the first energy storage particles;

[0024] The first energy storage particles are transported to the first storage tank through the circulation pipeline;

[0025] In the heat release stage, the first energy storage particles in the first storage tank are transported to the fluidized bed through the circulation pipeline;

[0026] In the fluidized bed, based on the heat exchange between the first energy storage particles and the second energy storage particles, the water in the water delivery pipeline of the heat energy application module is heated to generate steam.

[0027] The embodiments of the present invention have the following advantages:

[0028] In the embodiments of the present invention, the heating module provided in the fluidized bed can further heat the first energy storage particles after the heat storage module heats the first energy storage particles, so that the first energy storage particles can store more heat energy. After being heated to a preset temperature, they are stored in the first storage tank for later use, thereby realizing ultra-high temperature heat energy storage. At the same time, solid particles with high temperature resistance and high specific heat capacity can be used as the first energy storage particles for energy storage, overcoming the disadvantages of using molten salt. Therefore, the fluidized bed heat storage and release system in the embodiments of the present invention can support high-temperature storage, has a large heat storage density, and solves many problems such as large land occupation of the heat storage tank, small heat capacity, and large amount of molten salt medium used in the existing heat storage system due to small heat storage density. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the description of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1a is a schematic structural diagram of a fluidized bed heat storage and release system provided by an embodiment of the present invention;

[0031] Figure 1b is a schematic structural diagram of a heat supply module provided by an embodiment of the present invention;

[0032] Figure 2aIt is a schematic diagram of the heat storage process of a fluidized bed heat storage and release device provided by an embodiment of the present invention;

[0033] Figure 2b It is a schematic diagram of the heat release process of a fluidized bed heat storage and release device provided by an embodiment of the present invention;

[0034] Figure 3 It is a step flow chart of a fluidized bed heat storage and release method provided by an embodiment of the present invention. Detailed implementation manners

[0035] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Refer to Figure 1a , which shows a schematic structural diagram of a fluidized bed heat storage and release system provided by an embodiment of the present invention. The fluidized bed heat storage and release system 100 includes a heat supply module 101, a heat storage module 102 connected to the heat supply module 101, a fluidized bed 103 connected to the heat storage module 102 through a circulation pipeline, a first storage tank 104 for storing first energy storage particles, a second storage tank 105 for storing first energy storage particles, a heating module 106 partially placed in the fluidized bed cavity, and a heat energy application module 107 partially placed in the fluidized bed cavity. Among them, the heat energy application module 107 may include a water delivery pipeline partially placed in the fluidized bed cavity.

[0037] In the embodiment of the present invention, a heat exchange pipeline is arranged in the fluidized bed 103. The heat exchange pipeline can be set as a serpentine elbow to increase the contact area with the filling particles in the fluidized bed, so as to achieve the maximum heat exchange and improve the heat exchange efficiency. The heat exchange pipeline may include a first interface at the top and a second interface at the bottom. Among them, the first interface is used for the fluidized bed to output the first energy storage particles, and the second interface is used for inputting the first energy storage into the fluidized bed.

[0038] One end of the first interface of the fluidized bed 103 is connected to the third interface at the top of the first storage tank 104 through the circulation pipeline, and the other end is connected to the fifth interface at the top of the second storage tank 105 through the circulation pipeline. One end of the second interface of the fluidized bed is connected to the outlet of the heat storage module 102 through the circulation pipeline, and the other end is connected to the fourth interface at the bottom of the first storage tank through the circulation pipeline. The sixth interface at the bottom of the second storage tank 105 is connected to the heat storage module 102 through the circulation pipeline. The first energy storage particles are transported in the circulation pipeline, the second energy storage particles are filled in the fluidized bed, and the temperature of the first energy storage particles in the first storage tank is higher than that of the first energy storage particles in the second storage tank.

[0039] Among them, the first energy storage particles can be fixed particle materials with high temperature resistance and large specific heat capacity. Specifically, the melting point of the first energy storage particles is greater than 3000 °C. For example, the first energy storage particles can be graphite particles. Graphite particles refer to tiny particles made of graphite material. Graphite is a mineral composed of carbon elements, and its crystal structure is layered. The carbon atoms within each layer are bonded by strong covalent bonds, while the layers interact with each other through weak van der Waals forces. Graphite particles also have good thermal conductivity and can effectively transfer heat. Moreover, graphite has good stability against most chemical substances at room temperature. At the same time, graphite can maintain the stability of its physical and chemical properties in a high-temperature environment, and the melting point of graphite is approximately around 3652 degrees Celsius (6602 degrees Fahrenheit).

[0040] The second energy storage particles can be phase change capsule materials. The outer layer of the phase change capsule material can be covered with a high-temperature resistant shell, and the shell is filled with a material that undergoes a phase change at high temperatures. The second heat storage particles in the fluidized bed are filled in the fluidized bed cavity to embed heat exchange tubes, heating modules, and thermal energy application modules, and participate in heat exchange during the heat release stage and the heat storage stage.

[0041] In the embodiment of the present invention, the heat supply module can be used to collect energy and convert the collected energy into heat energy.

[0042] In one example, the energy collected by the heat supply module can include any one of the following:

[0043] Light energy, wind energy, off-peak electricity.

[0044] Specifically, when the heat supply module collects light energy, it can convert the light energy into heat energy through photothermal technology, and then apply the heat energy in the heat storage module to heat the first energy storage particles; when the heat supply module uses wind energy, it can convert the collected wind energy into heat energy and then apply the heat energy through the heat storage module to heat the first energy storage particles; the heat supply module can also collect off-peak electricity, convert the off-peak electricity into heat energy, and then use the heat energy to heat the first energy storage particles.

[0045] Refer toFigure 1b , which shows a schematic structural diagram of a heat supply module in an embodiment of the present invention. The heat supply module is used to collect light energy. The heat supply module 101 includes a fixed seat 10 and a direction platform 16. A fixed plate 11 is provided at the bottom end of the direction platform 16. One side of the top end of the direction platform 16 is fixedly connected to the bottom end of the fixed seat 10. A solar panel 19 is rotatably connected inside the fixed seat 10. A servo motor 13 is fixedly installed in the middle of the top end of the fixed plate 11. The output end of the servo motor 13 is fixedly connected to the side facing the direction platform 16. Two vertical rods 15 are fixedly installed on both sides of the bottom end of the direction platform 16. The bottom ends of the two vertical rods 15 are both fixedly installed with sliding blocks 14. A sliding groove 12 is formed on the surface of the fixed plate 11. The two sliding blocks 14 are both slidably connected to the sliding groove 12. A connecting seat 17 is fixedly installed on the side of the top end of the direction platform 16 away from the fixed seat 10. A rotating self-locking telescopic rod 18 is installed inside the connecting seat 17. The movable end of the self-locking telescopic rod 18 is rotatably connected to the side facing the solar panel 19. The solar panel 19 is connected to a receiver. The heat supply module 101 is connected to the receiver fixedly installed at the top of the heat storage module 102.

[0046] In an embodiment of the present invention, the heat storage module can be used to heat the first energy storage particles in the circulation pipeline by using the heat energy of the heat supply module. Specifically, a serpentine elbow can be provided in the heat storage module to increase the pipeline contact area in a limited space, so that the first energy storage particles transported to the heat storage module through the circulation pipeline are heated. The inlet of the heat storage module can be connected to the sixth interface of the second storage tank. Then, the second storage tank can transport low-temperature first heat storage particles to the heat storage module through the circulation pipeline. At the heat storage module, the low-temperature first heat storage particles can be heated into high-temperature first energy storage particles by the heat storage module. The heated first energy storage particles can reach a first preset temperature (for example, in the light energy to heat energy technology, the first preset temperature can be 600 to 1000 degrees Celsius). Then, the first energy storage particles are transported from the outlet of the heat storage module and can be transported into the fluidized bed through the heat exchange pipeline inlet (i.e., the second interface) through the circulation module.

[0047] In an embodiment of the present invention, on the one hand, the fluidized bed can realize heat storage and heat release. On the other hand, by setting a heating module, the first energy storage particles entering the fluidized bed can be further heated to increase the temperature of the first energy storage particles. The first energy storage particles in the embodiment of the present invention can be heated to a second preset temperature in the fluidized bed (for example, in the light energy to heat energy technology, the second preset temperature can be above 3000 degrees Celsius). Among them, the heating module can be used to heat the first energy storage particles heated by the heat storage module during the energy storage stage. The heated first energy storage particles can flow out from the bottom outlet of the fluidized bed heat exchange pipeline and be transported into the first storage tank through the circulation pipeline for storage, completing heat storage.

[0048] In an embodiment of the present invention, circulating air passes through the circulating pipeline, and a first separator (such as Figure 1a 108 in is provided on the circulating pipeline connecting the third interface of the first storage tank and the first interface of the fluidized bed. The third interface of the first storage tank is connected to the sixth interface of the second storage tank through a circulating pipeline; the first separator is used to separate the circulating air and the first energy storage particles after heating, so that the separated first energy storage particles are stored in the first storage tank, and the first energy storage particles output from the second storage tank are transported to the heat storage module through the circulating air.

[0049] In practical applications, circulating air can be passed through the circulating pipeline to transport the first energy storage particles. The first separator can be a cyclone separator for gas-solid separation. The first energy storage particles heated in the fluidized bed are transported to the first separator through the circulating pipeline. The first separator performs gas-solid separation, and the first energy storage particles settle and fall into the first storage tank for storage, realizing heat energy storage. The separated circulating air can be transported along the circulating pipeline to the pipeline between the second storage tank and the heat storage module. Then, when the second storage tank transports the first energy storage particles to the heat storage module through the sixth interface, on the one hand, the circulating air can assist in transporting the first energy storage particles and accelerate the flow rate. On the other hand, the circulating air separated from the first separator is hot air, carrying part of the heat energy. Therefore, the first energy storage particles can be preheated.

[0050] In another embodiment of the present invention, a second separator (such as Figure 1a 109 in is provided on the circulating pipeline connecting the fifth interface of the second storage tank and the fluidized bed. The fourth interface of the first storage tank is connected to the fifth interface of the second storage tank through a circulating pipeline; the second separator is used to separate the circulating air and the first energy storage particles after cooling, so that the separated first energy storage particles are stored in the second storage tank, and the first energy storage particles output from the first storage tank are transported to the fluidized bed through the circulating air.

[0051] In practical applications, the second separator can be a cyclone separator for gas-solid separation. During the heat release process, the low-temperature first energy storage particles after fluidized heat transfer are output from the top first interface and transported to the second separator through the circulating pipeline. Then, the second separator performs gas-solid separation, and the first energy storage device settles and is stored in the second storage tank 105, waiting for the next round of heat storage and release. The circulating air separated by the second separator can be transported through the circulating pipeline to the circulating pipeline between the fourth interface of the first storage tank and the second interface of the fluidized bed. Thus, during the heat release process, when the first energy storage particles are output from the first storage tank, adding circulating air can increase the transportation speed of the first energy storage particles.

[0052] In an embodiment of the present invention, one or more temperature controllers can also be provided on the side of the fluidized bed, and then the temperature can be monitored by a thermometer during the heat storage and release stage to accurately control the heat storage and release, avoiding difficult to achieve the desired effect due to too high or too low temperature.

[0053] In one example, the heating module is heated by an electric heating method. Specifically, the electric heating method can include but is not limited to: electromagnetic heating, resistance heating, infrared heating, etc.

[0054] In an embodiment of the present invention, the thermal energy application module in the fluidized bed can be turned on during the heat release stage of the fluidized bed, and then the thermal energy stored in the first energy storage particles in the first storage tank is applied to various fields. Specifically, the thermal energy application module can include a water delivery pipeline and a cold water pump. The thermal energy application module can be used to start the cold water pump during the heat release stage, and water flows through the water delivery pipeline. Then, the first energy storage particles transported from the first storage tank to the fluidized bed are used to heat the water in the water delivery pipeline to generate steam, and then the related applications of the steam are realized.

[0055] In one example, after generating steam, the thermal energy application module can transport the generated steam to a heating pipeline or a steam user.

[0056] In another example, the thermal energy application module further includes a steam power generation unit, and the steam power generation unit is used to generate steam power using the generated steam.

[0057] In an embodiment of the present invention, during the heat release stage of the fluidized bed, the high-temperature first energy storage particles enter the fluidized bed from the inlet of the heat exchange pipeline. After exchanging heat with the second energy storage particles and the water delivery pipeline, the heat is transferred to the second energy storage particles and the water delivery pipeline. The high-temperature first energy storage particles become low-temperature first energy storage particles, and then flow out from the bottom outlet of the heat exchange pipeline and are transported to the second storage tank through a circulation pipeline and stored in the second storage tank, thus realizing the circulation of the first heat storage particles in the entire fluidized bed heat storage and release system.

[0058] In an embodiment of the present invention, a first valve can also be provided at the outlet of the heat exchange pipeline of the fluidized bed. This valve is a three-way valve. The first end of the first valve is connected to the outlet of the heat exchange pipeline, the second end is connected to the first storage tank, and the third end is connected to the second storage tank. During the heat storage stage, the first end and the second end are connected, and the high-temperature first energy storage particles heated in the fluidized bed are transported to the first storage tank for storage; during the heat release stage, the first end and the third end are connected, and the low-temperature first energy storage particles after heat release in the fluidized bed are transported to the second storage tank for storage.

[0059] A second valve is provided at the inlet of the fluidized bed. The second valve is a three-way valve. The first end of the second valve is connected to the second interface at the bottom of the fluidized bed, the second end is connected to the heat storage module, and the third end is connected to the first storage tank. During the heat storage stage, the first end and the second end of the second valve are connected, and the third end is closed, and the first energy storage particles heated by the heat storage module are transported to the fluidized bed. During the heat release stage, the first end and the third end of the second valve are connected, and the second end is closed, so that the high-temperature first energy storage particles in the first storage tank are transported from the fourth interface along the circulation pipeline to the fluidized bed for heat release.

[0060] In an embodiment of the present invention, a third valve may also be provided on the circulation pipeline between the second storage tank and the heat storage module 102. The third valve is a one-way valve, and the third valve is used to control the transportation of the first energy storage particles from the second storage tank 105 to the heat storage module 102, that is, when the third valve is in the open state, the first energy storage device can be transported from the second storage tank to the heat storage module along the circulation pipeline. When the third valve is in the closed state, the second storage tank stops transporting the first energy storage particles to the heat storage module.

[0061] In the embodiment of the present invention, in the fluidized bed heat storage and release system, by applying the fluidized bed to heat the first energy storage particles after being heated by the heat storage module, the temperature of the first energy storage particles can be increased, high-temperature energy storage can be realized, and by using solid particles with high temperature resistance and high specific heat capacity as the first energy storage particles for energy storage, the disadvantages of using molten salt can be overcome.

[0062] The following combines Figure 2a and Figure 2b to illustrate the heat storage and heat release processes in the embodiment of the present invention:

[0063] Referring to Figure 2a shown in the figure, it is a schematic diagram of the heat storage process of a fluidized bed heat storage and release device in an embodiment of the present invention. The thick solid line part is the circuit diagram of the first energy storage particles during the heat storage process. The heat supply device 101 collects energy, such as light energy, wind energy, etc., converts the energy into heat energy, and stores it in the heat storage module 102. The low-temperature first energy storage particles in the second storage tank 105 are transported from the sixth interface along the circulation pipeline to the heat storage module 102. The heat storage module 102 heats the first energy storage particles, and the heated first energy storage particles enter the fluidized bed 103 from the second interface along the circulation pipeline. In the fluidized bed, the heating module 106 can heat the first energy storage particles again to make the first energy storage particles reach 3000 degrees Celsius, and then output from the first interface of the fluidized bed 103, and then be transported to the first separator 108 along the circulation pipeline through the first valve for gas-solid separation. The first energy storage particles are separated and stored in the first storage tank 104, and the separated circulating air is transported along the circulation pipeline to the circulation pipeline between the sixth interface of the second storage tank 105 and the heat storage module 102 to assist in transporting the first energy storage particles.

[0064] Referring to Figure 2bAs shown in the figure, it is a schematic diagram of the heat release process of a fluidized bed heat storage and release device in an embodiment of the present invention. The thick solid line part is the circuit diagram of the first energy storage particles during the heat release process. The first energy storage particles stored in the first storage tank 104 are transported along the circulation pipeline to the fluidized bed 103. In the fluidized bed 103, during the heat exchange process between the first energy storage particles and the second energy storage particles, the water in the water conveyance pipeline is heated to generate steam, and then steam power generation is carried out. After the heat exchange is completed, the first energy storage particles are output from the fluidized bed 103 through the first interface and then transported to the second separator 109 by the circulation pipeline. The second separator performs gas-solid separation. After the first energy storage particles are separated, they are stored in the second storage tank. The separated circulating air is transported along the pipeline to the circulation pipeline between the fourth interface and the second interface to assist in transporting the first energy storage particles.

[0065] In the embodiment of the present invention, through the heating module provided in the fluidized bed, after the heat storage module heats the first energy storage particles, the first energy storage particles can be further heated, so that the first energy storage particles can store more thermal energy. After being heated to a preset temperature, they are stored in the first storage tank for later use, so that ultra-high temperature heat storage can be realized. At the same time, solid particles with high temperature resistance and high specific heat capacity can be used as the first energy storage particles for energy storage, overcoming the disadvantages of using molten salt. Therefore, the fluidized bed heat storage and release system in the embodiment of the present invention can support high-temperature storage, has a large heat storage density, and solves many problems in the prior art such as large land occupation of the heat storage tank, small heat capacity, and large consumption of molten salt medium due to the small heat storage density of the heat storage system.

[0066] Refer to Figure 3 , which shows a step flow chart of a fluidized bed heat storage and release method provided by an embodiment of the present invention, applied to a fluidized bed heat storage and release system. The fluidized bed heat storage and release system includes a heat supply module, a heat storage module connected to the heat supply module, a fluidized bed connected to the heat storage module through a circulation pipeline, a first storage tank for storing the first energy storage particles, a second storage tank for storing the first energy storage particles, a heating module partially disposed in the fluidized bed cavity, and a thermal energy application module partially disposed in the fluidized bed cavity. The thermal energy application module includes a water conveyance pipeline partially disposed in the fluidized bed cavity. The heat exchange pipeline in the fluidized bed includes a first interface at the top and a second interface at the bottom. One end of the first interface is connected to the third interface at the top of the first storage tank through the circulation pipeline, and the other end is connected to the fifth interface at the top of the second storage tank through the circulation pipeline. One end of the second interface is connected to the outlet of the heat storage module through the circulation pipeline, and the other end is connected to the fourth interface at the bottom of the first storage tank through the circulation pipeline. The sixth interface at the bottom of the second storage tank is connected to the heat storage module through the circulation pipeline. The first energy storage particles are transported in the circulation pipeline. The fluidized bed is filled with second energy storage particles. The temperature of the first energy storage particles in the first storage tank is higher than the temperature of the first energy storage particles in the second storage tank, where:

[0067] The heat supply module is used to collect energy and convert the collected energy into heat energy;

[0068] The heat storage module is used to heat the first energy storage particles in the circulation pipeline by using the heat energy of the heat supply module;

[0069] The heating module is used to heat the first energy storage particles heated by the heat storage module during the energy storage stage;

[0070] The heat energy application module is used to heat the water in the water conveyance pipeline by using the first energy storage particles transported from the first storage tank to the fluidized bed during the heat release stage to generate steam.

[0071] Wherein:

[0072] The heat supply module is used to collect energy and convert the collected energy into heat energy;

[0073] The heat storage module is used to heat the first energy storage particles in the circulation pipeline by using the heat energy of the heat supply module;

[0074] The heating module is used to heat the first energy storage particles heated by the heat storage module during the energy storage stage;

[0075] The heat energy application module is used to heat the water in the water conveyance pipeline by using the first energy storage particles transported from the first storage tank to the fluidized bed during the heat release stage to generate steam.

[0076] The heat storage and release method based on the above fluidized bed heat storage and release system may specifically include the following steps:

[0077] Step S301, collect energy by using the heat supply module and convert the collected energy into heat energy;

[0078] Step S302, heat and transport the heat energy to the heat storage module to heat the first energy storage particles transported from the second storage tank to the heat storage module in the circulation pipeline;

[0079] Step S303, heat the first energy storage particles in the fluidized bed by using the heating module;

[0080] Step S304, transport the first energy storage particles to the first storage tank through the circulation pipeline;

[0081] Step S305, during the heat release stage, transport the first energy storage particles in the first storage tank to the fluidized bed through the circulation pipeline;

[0082] Step S306: Based on the heat exchange between the first energy storage particles and the second energy storage particles within the fluidized bed, heat the water within the water delivery pipeline of the thermal energy application module to generate steam.

[0083] In an embodiment of the present invention, after step S306, the low-temperature first energy storage particles after heat exchange can be transported through a circulation pipeline to a second storage tank for a new round of heat storage and release, thereby enabling long-term heat storage and release.

[0084] In an embodiment of the present invention, the heat supply module can be used to collect energy and convert the collected energy into heat energy; the heat energy is heated and transported to the heat storage module, and the first energy storage particles transported from the second storage tank to the heat storage module within the circulation pipeline can be heated; within the fluidized bed, the heating module is used to heat the first energy storage particles; the first energy storage particles are transported through the circulation pipeline to the first storage tank; during the heat release stage, the first energy storage particles within the first storage tank are transported through the circulation pipeline to the fluidized bed; based on the heat exchange between the first energy storage particles and the second energy storage particles within the fluidized bed, heat the water within the water delivery pipeline of the thermal energy application module to generate steam. Thus, high-temperature heat storage and release are achieved through the first energy storage particles with high temperature resistance and high specific heat capacity, overcoming the defects of existing molten salt heat storage, and cyclic heat storage and release can be realized.

[0085] It should be noted that for the method embodiments, for simplicity of description, they are expressed as a series of action combinations. However, those skilled in the art should be aware that the embodiments of the present invention are not limited by the described action sequences, because according to the embodiments of the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential for the embodiments of the present invention.

[0086] An embodiment of the present invention further provides an electronic device, which may include a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, the above-mentioned fluidized bed heat storage and release method is implemented.

[0087] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor, the above-mentioned fluidized bed heat storage and release method is implemented.

[0088] For the method embodiments, since they are basically similar to the system embodiments, the description is relatively simple. For the relevant parts, refer to the partial description of the system embodiments.

[0089] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0090] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0091] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate a device for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0092] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0093] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0094] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0095] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0096] The above provides a detailed introduction to a fluidized bed heat storage and release system and a fluidized bed heat storage and release method. Specific examples are used in this text to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A fluidized bed heat storage and release system, characterized in that: The fluidized bed heat storage and release system includes a heat supply module, a heat storage module connected to the heat supply module, a fluidized bed connected to the heat storage module through a circulation pipeline, a first storage tank for storing the first energy storage particles, a second storage tank for storing the first energy storage particles, a heating module partially disposed in the fluidized bed cavity, and a heat energy application module partially disposed in the fluidized bed cavity. The heat supply module includes a fixed seat and a solar panel rotatably connected inside the fixed seat. A receiver is fixedly installed at the top of the heat storage module. The solar panel is connected to the receiver. A serpentine elbow is provided inside the heat storage module. The heat energy application module includes a water conveying pipeline partially disposed in the fluidized bed cavity. The heat exchange pipeline in the fluidized bed includes a first interface at the top and a second interface at the bottom. One end of the first interface is connected to the third interface at the top of the first storage tank through the circulation pipeline, and the other end is connected to the fifth interface at the top of the second storage tank through the circulation pipeline. One end of the second interface is connected to the outlet of the heat storage module through the circulation pipeline, and the other end is connected to the fourth interface at the bottom of the first storage tank through the circulation pipeline. The sixth interface at the bottom of the second storage tank is connected to the heat storage module through the circulation pipeline. The first energy storage particles are transported in the circulation pipeline. The fluidized bed is filled with second energy storage particles. The temperature of the first energy storage particles in the first storage tank is higher than that of the first energy storage particles in the second storage tank. Among them: The first energy storage particles are graphite particles, and the second energy storage particles are phase change capsule materials; The heat supply module is used to collect energy and convert the collected energy into heat energy; The heat storage module is used to heat the first energy storage particles in the circulation pipeline with the heat energy of the heat supply module; The heating module is used to heat the first energy storage particles heated by the heat storage module during the energy storage stage. The first energy storage particles are heated to a second preset temperature in the fluidized bed. The second preset temperature is above 3000 degrees Celsius. The heated first energy storage particles flow out from the top outlet of the heat exchange pipeline in the fluidized bed and are transported to the first storage tank through the circulation pipeline for storage, completing the heat storage; The heat energy application module is used to heat the water in the water conveying pipeline with the first energy storage particles transported from the first storage tank to the fluidized bed during the heat release stage to generate steam.

2. The fluidized bed heat storage and release system according to claim 1, wherein: Circulating air is passed through the circulation pipeline. A first separator is provided on the circulation pipeline connecting the third interface of the first storage tank and the first interface of the fluidized bed. The third interface of the first storage tank is connected to the sixth interface of the second storage tank through a circulation pipeline; The first separator is used to separate the circulating air and the heated first energy storage particles, so that the separated first energy storage particles are stored in the first storage tank, and the first energy storage particles output from the second storage tank are transported to the heat storage module through the circulating air.

3. The fluidized bed heat storage and release system according to claim 2, wherein: A second separator is provided on the circulation pipeline connecting the fifth interface of the second storage tank and the fluidized bed. The fourth interface of the first storage tank is connected to the fifth interface of the second storage tank through a circulation pipeline; The second separator is used to separate the circulating air and the cooled first energy storage particles, so that the separated first energy storage particles are stored in the second storage tank, and the first energy storage particles output from the first storage tank are transported to the fluidized bed through the circulating air.

4. The fluidized bed heat storage and release system according to claim 1, characterized in that: The thermal energy application module further includes a steam power generation unit, and the steam power generation unit is used to generate electricity by using the generated steam.

5. The fluidized bed heat storage and release system according to claim 1, wherein: The thermal energy application module is further used to transport the generated steam to a heating pipeline or a steam user.

6. The fluidized bed heat storage and release system according to claim 1, wherein: The heating module is heated by means of electric heating.

7. The fluidized bed heat storage and release system according to claim 1, wherein: The melting point of the first energy storage particles is higher than 3000 °C.

8. The fluidized bed heat storage and release system according to claim 1, wherein: The fluidized bed is connected to a blower, and the blower is used to blow air into the fluidized bed during the heat release stage.

9. A fluidized bed heat storage and release method, applied to the fluidized bed heat storage and release system according to any one of claims 1 to 8, characterized in that, The method includes: Collecting energy by using the heat supply module and converting the collected energy into heat energy; Heating and transporting the heat energy to the heat storage module to heat the first energy storage particles transported from the second storage tank to the heat storage module in the circulating pipeline; In the fluidized bed, heating the first energy storage particles by using the heating module; Transporting the first energy storage particles to the first storage tank through the circulating pipeline; During the heat release stage, transporting the first energy storage particles in the first storage tank to the fluidized bed through the circulating pipeline; In the fluidized bed, heating the water in the water delivery pipeline of the thermal energy application module based on the heat exchange between the first energy storage particles and the second energy storage particles to generate steam.

Images