Fluidized bed heat storage and release system and fluidized bed heat storage and release method

Abstract

The embodiment of the invention provides a fluidized bed heat storage and release system and a fluidized bed heat storage and release method, and the fluidized bed heat storage and release system comprises a heat supply module, a heat storage module, a fluidized bed, a first storage tank, a second storage tank, a heating module partially arranged in a cavity of the fluidized bed, and a heat energy application module partially arranged in the cavity of the fluidized bed, the heat energy application module comprises a water conveying pipeline partially arranged in a cavity of the fluidized bed, a heat exchange pipeline in the fluidized bed comprises a first connector at the top and a second connector at the bottom, one end of the first connector is connected with a third connector at the top of the first storage tank through a circulating pipeline, and the other end of the first connector is connected with a fifth connector at the top of the second storage tank through a circulating pipeline. One end of the second connector is connected with an outlet of the heat storage module through a circulating pipeline, and the other end of the second connector is connected with a fourth connector at the bottom of the first storage tank through a circulating pipeline. Ultrahigh-temperature energy storage of the solid energy storage particles is achieved, and the defect of fused salt heat storage is overcome.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular 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 storage, molten salt energy storage is nearing completion of its development stage and is in the stage of large-scale promotion. Due to the excellent properties of molten salt, molten salt energy storage has huge advantages in the field of medium and high temperature steam supply. However, there are still problems in its application in 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 needs of future advanced high-temperature solar thermal power generation (800-1000°C), and it is difficult to achieve ultra-high temperature heat storage; second, molten salt has a high solidification point and is easy to solidify at low temperatures, which can easily clog pipelines, limit the temperature range of use, and the viscosity will change with temperature changes, 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 the above problems 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 comprising 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 disposed in the fluidized bed cavity, and a heat energy application module partially disposed in the fluidized bed cavity, the heat energy application module comprising a water delivery pipeline partially disposed in the fluidized bed cavity, the heat exchange pipeline in the fluidized bed comprising a first interface at the top and a second interface at the bottom, one end of the first interface passing through the A circulation pipeline is connected to the third interface at the top of the first storage tank, 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 thermal 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 thermal storage module through the circulation pipeline. The first energy storage particles are transported in the circulation pipeline, and the second energy storage particles are filled in the fluidized bed. 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, wherein:

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

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

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

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

[0009] Optionally, 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, and the third interface of the first storage tank and the sixth interface of the second storage tank are connected through the circulation pipeline;

[0010] 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 thermal storage module through the circulating air.

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

[0012] 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.

[0013] Optionally, the energy collected by the heating module includes any of the following:

[0014] Solar energy, wind energy, and valley electricity.

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

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

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

[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 fluidized bed heat storage and release method is applied to the fluidized bed heat storage and release system as described above, the method comprising:

[0021] The heating module is used to collect energy and convert the collected energy into thermal energy;

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

[0023] In the fluidized bed, heating the first energy storage particles using the heating module;

[0024] transporting the first energy storage particles 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] Based on the heat exchange between the first energy storage particles and the second energy storage particles in the fluidized bed, water in the water pipeline of the thermal energy application module is heated to generate steam.

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

[0028] In the embodiment of the present invention, the heating module arranged 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 thermal energy, and after being heated to a preset temperature, the thermal energy is stored in the first storage tank for standby use, thereby realizing ultra-high temperature thermal energy storage. At the same time, high temperature resistant solid particles with 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 the storage of high temperature and has a high heat storage density, thereby solving many problems in the prior art such as the large area of ​​the heat storage tank, small heat capacity, and large amount of molten salt medium used due to the low heat storage density of the heat storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

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

[0031] Figure 1b This is a schematic diagram of a heating module structure provided by an embodiment of the present invention;

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

[0034] Figure 3 It is a flow chart of the steps of a fluidized bed heat storage and release method provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all 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.

[0036] Reference Figure 1a , showing 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 disposed in the fluidized bed cavity, and a heat energy application module 107 partially disposed in the fluidized bed cavity, wherein the heat energy application module 107 may include a water supply pipeline partially disposed in the fluidized bed cavity.

[0037] In the embodiment of the present invention, a heat exchange pipe is provided in the fluidized bed 103, and the heat exchange pipe can be provided as a serpentine bend pipe to increase the contact area between the fluidized bed and the filling particles, so as to achieve the maximum heat exchange and improve the heat exchange efficiency. The heat exchange pipe can include a first interface at the top and a second interface at the bottom, wherein 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 pipe, and the other end is connected to the fifth interface at the top of the second storage tank 105 through the circulation pipe. One end of the second interface of the fluidized bed is connected to the outlet of the heat storage module 102 through the circulation pipe, and the other end is connected to the fourth interface at the bottom of the first storage tank through the circulation pipe. The sixth interface at the bottom of the second storage tank 105 is connected to the heat storage module 102 through the circulation pipe. The first energy storage particles are transported in the circulation pipe, and the second energy storage particles are filled in the fluidized bed. 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.

[0039] Among them, the first energy storage particles can be fixed particle materials that are resistant to high temperatures and have 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 materials. Graphite is a mineral composed of carbon elements. Its crystal structure is layered. The carbon atoms in each layer are bound by strong covalent bonds, while the layers interact with each other through weaker van der Waals forces. Graphite particles also have good thermal conductivity and can effectively transfer heat. And graphite has good stability to most chemicals at room temperature. At the same time, graphite can maintain the stability of its physical and chemical properties in a high temperature environment. The melting point of graphite is about 3652 degrees Celsius (6602 degrees Fahrenheit).

[0040] The second energy storage particles can be phase change capsule materials, the outer layer of which can cover a high temperature resistant shell, and the shell is filled with a material that undergoes 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 in the heat release stage and the heat storage stage.

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

[0042] In one example, the energy collected by the heating module may include any of the following:

[0043] Solar energy, wind energy, and valley electricity.

[0044] Specifically, when the heating module collects light energy, it can convert the light energy into thermal energy through photothermal technology, and then use the thermal energy to heat the first energy storage particles in the thermal storage module; when the heating module uses wind energy, the collected wind energy can be converted into thermal energy, and then the thermal energy can be used to heat the first energy storage particles through the thermal storage module; the heating module can also collect valley electricity, and then convert the valley electricity into thermal energy, and then use the thermal energy to heat the first energy storage particles.

[0045] Reference Figure 1b , shows a schematic structural diagram of a heating module in an embodiment of the present invention, which is used to collect light energy. The heating module 101 includes a fixed seat 10 and a direction platform 16, the bottom end of the direction platform 16 is provided with a fixed plate 11, one side of the top of the direction platform 16 is fixedly connected to the bottom end of the fixed seat 10, and the inside of the fixed seat 10 is rotatably connected with a solar panel 19. A servo motor 13 is fixedly installed in the middle of the top of the fixed plate 11, and the output end of the servo motor 13 is fixedly connected to the side directly opposite to the direction platform 16. Vertical poles 15 are fixedly installed on both sides of the bottom end of the direction platform 16, and sliding blocks 14 are fixedly installed at the bottom ends of the two vertical poles 15. A sliding groove 12 is opened on the surface of the fixed plate 11, and the two sliding blocks 14 are slidably connected to the sliding groove 12. A connecting seat 17 is fixedly installed on the side of the top of the direction platform 16 away from the fixing seat 10, and a self-locking telescopic rod 18 is rotated inside the connecting seat 17. The movable end of the self-locking telescopic rod 18 is rotatably connected to the side opposite to the solar panel 19, and the solar panel 19 is connected to the receiver. The heating module 101 is connected to the receiver fixedly installed on 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 using the heat energy of the heating module. Specifically, a serpentine elbow can be provided in the heat storage module to increase the contact area of ​​the pipeline 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, and then the second storage tank can transport the 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 by the heat storage module into high-temperature first energy storage particles, and the heated first energy storage particles can reach a first preset temperature (such as in the light energy to heat energy technology, the first preset temperature can be 600 to 1000 degrees Celsius), and then the first energy storage particles are transported from the outlet of the heat storage module, and can be transported to the fluidized bed through the inlet of the heat exchange pipeline (i.e., the second interface) through the circulation module.

[0047] In the embodiment of the present invention, the fluidized bed can realize heat storage and release on the one hand, and 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 (such as 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 pipe and be transported to the first storage tank through the circulation pipe for storage to complete heat storage.

[0048] In one embodiment of the present invention, the circulating air is passed through the circulating pipe, and a first separator (such as Figure 1a In 108), 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 thermal 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, and 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, and the first separator performs gas separation, and the first energy storage particles settle and fall into the first storage tank for storage to achieve thermal energy storage, and the separated circulating air can be transported along the circulating pipeline to the pipeline between the second storage tank and the thermal storage module, and then when the second storage tank transports the first energy storage particles to the thermal storage module through the sixth interface, the circulating air can assist in transporting the first energy storage particles and speed up the flow rate, and on the other hand, the circulating air separated from the first separator is hot air, carrying part of the thermal energy, so that the first energy storage particles can be preheated.

[0050] In another embodiment of the present invention, a second separator (such as Figure 1a 109), 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.

[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 circulation pipeline, and 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 to the circulation pipeline between the fourth interface of the first storage tank and the second interface of the fluidized bed through the circulation pipeline, so that during the heat release process, the first energy storage particles are output from the first storage tank, and the addition of 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 may be arranged on the side of the fluidized bed, and the temperature may be monitored by the temperature meter during the heat storage and release stage to accurately control the heat storage and release to avoid the difficulty in achieving the expected effect due to excessively high or low temperature.

[0053] In one example, the heating module is heated by electric heating, which may 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 phase of the fluidized bed, and the thermal energy stored in the first energy storage particles in the first storage tank can be applied to various fields. Specifically, the thermal energy application module can include a water pipeline and a cold water pump. The thermal energy application module can be used to start the cold water pump during the heat release phase, pass water through the water pipeline, and then use the first energy storage particles transported from the first storage tank to the fluidized bed to heat the water in the water pipeline to generate steam, thereby realizing related applications of steam.

[0055] In one example, after generating steam, the thermal energy application module may transmit the generated steam to a heating pipe or a steam user.

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

[0057] In one embodiment of the present invention, during the heat release stage of the fluidized bed, high-temperature first energy storage particles enter the fluidized bed from the inlet of the heat exchange pipe, and after exchanging heat with the second energy storage particles and the water pipe, transfer heat to the second energy storage particles and the water pipe, and the high-temperature first energy storage particles are converted into low-temperature first energy storage particles, and then flow out from the bottom outlet of the heat exchange pipe, and are transported to the second storage tank through the circulation pipe and stored in the second storage tank, thereby realizing the circulation of the first heat storage particles in the entire fluidized bed heat storage and release system.

[0058] In the embodiment of the present invention, a first valve can also be provided at the outlet of the fluidized bed heat exchange pipe, and the valve is a three-way valve, the first end of the first valve is connected to the outlet of the heat exchange pipe, the second end is connected to the first storage tank, and the third end is connected to the second storage tank. In the heat storage stage, the first end is connected to the second end, and the high-temperature first energy storage particles heated in the fluidized bed are transported to the first storage tank for storage; in the heat release stage, the first end is connected to the third end, and the low-temperature first energy storage particles released 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. In the heat storage stage, the first end of the second valve is connected to the second end, and the third end is closed, so that the first energy storage particles heated by the heat storage module are transported to the fluidized bed. In the heat release stage, the first end of the second valve is connected to the third end, 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 to release heat.

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

[0061] In an embodiment of the present invention, in a fluidized bed heat storage and release system, the first energy storage particles heated by the heat storage module are heated by using a fluidized bed, so that the temperature of the first energy storage particles can be increased to achieve high-temperature energy storage, and the disadvantages of using molten salt can be overcome by using high-temperature resistant and high-specific heat capacity solid particles as the first energy storage particles for energy storage.

[0062] The following combination Figure 2a as well as Figure 2b The heat storage and heat release process in the embodiment of the present invention is described as follows:

[0063] Reference Figure 2a As shown, 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 particle in the heat storage process. The heating 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 the fluidized bed 103 from the first interface, and then pass through the first valve along the circulation pipeline to the first separator 108 for gas-solid separation. The first energy storage particles are separated and stored in the first storage tank 104. 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] Reference Figure 2bAs shown, 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 particle in the heat release process. The first energy storage particles stored in the first storage tank 104 are transported to the fluidized bed 103 along the circulation pipeline. 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 pipeline is heated to generate steam, and then steam power generation is performed. After the heat exchange is completed, the first interface outputs the fluidized bed 103, and then is 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 circulating wind after separation 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 an embodiment of the present invention, a heating module arranged 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 thermal energy, and after being heated to a preset temperature, the first energy storage particles are stored in the first storage tank for standby use, thereby realizing ultra-high temperature thermal energy storage. At the same time, high temperature resistant solid particles with 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 and has a high heat storage density, thereby solving many problems in the prior art such as large space occupied by the heat storage tank, small heat capacity, and large amount of molten salt medium due to the low heat storage density of the heat storage system.

[0066] Reference Figure 3 , showing a flow chart of the steps of a fluidized bed heat storage and release method provided by an embodiment of the present invention, which is applied to a fluidized bed heat storage and release system, wherein the fluidized bed heat storage and release system includes a heating module, a heat storage module connected to the heating 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 disposed in the fluidized bed cavity, and a heat energy application module partially disposed in the fluidized bed cavity, wherein the heat energy application module includes a water delivery pipeline partially disposed in the fluidized bed cavity, and the heat exchange pipeline in the fluidized bed includes a first interface at the top and a second interface at the bottom. The first interface has two interfaces, one end of which is connected to the third interface on the top of the first storage tank through the circulation pipeline, and the other end is connected to the fifth interface on the top of the second storage tank through the circulation pipeline, one end of the second interface is connected to the outlet of the thermal 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, and the sixth interface at the bottom of the second storage tank is connected to the thermal storage module 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 the temperature of the first energy storage particles in the second storage tank, wherein:

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

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

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

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

[0071] in:

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

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

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

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

[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, using the heating module to collect energy and convert the collected energy into thermal energy;

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

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

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

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

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

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

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

[0085] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders 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 required by 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 in the memory and capable of running on the processor. When the computer program is executed by the processor, the fluidized bed heat storage and release method as described above 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 a processor, the fluidized bed heat storage and release method as described above is implemented.

[0088] As for the method embodiment, since it is basically similar to the system embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0089] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0090] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the embodiments of the present invention may take the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. Moreover, the embodiments of the present invention may take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

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

[0092] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes 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 operating steps are executed on the computer or other programmable terminal device to produce computer-implemented processing, so that the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0094] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0095] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[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 herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on 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 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 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 second energy storage particles are filled in the fluidized bed, 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, wherein: The heating module is used to collect energy and convert the collected energy into thermal energy; The heat storage module is used to heat the first energy storage particles in the circulation pipeline using the heat energy of the heating module; The heating module is used to heat the first energy storage particles heated by the thermal storage module during the energy storage stage; The heat energy application module is used to heat the water in the water pipeline using the first energy storage particles transported to the fluidized bed from the first storage tank to generate steam during the heat release stage.

2. The fluidized bed heat storage and release system according to claim 1, characterized in that: The circulation pipe is provided with circulating air, a first separator is provided on the circulation pipe connecting the third interface of the first storage tank and the first interface of the fluidized bed, and the third interface of the first storage tank and the sixth interface of the second storage tank are connected through the circulation pipe; 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 thermal storage module through the circulating air.

3. The fluidized bed heat storage and release system according to claim 2, characterized in that: A second separator is provided on a circulation pipeline connecting the fifth interface of the second storage tank and the fluidized bed, and the fourth interface of the first storage tank and the fifth interface of the second storage tank are connected through the 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 energy collected by the heating module includes any of the following: Solar energy, wind energy, and valley electricity.

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

6. The fluidized bed heat storage and release system according to claim 1, characterized in that: The thermal energy application module is further used to transmit the generated steam to a heating pipeline or a steam user.

7. The fluidized bed heat storage and release system according to claim 1, characterized in that: The heating module is heated by electric heating.

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

9. The fluidized bed heat storage and release system according to claim 1, characterized in that: 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.

10. 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 9, characterized in that: The method comprises: The heating module is used to collect energy and convert the collected energy into thermal energy; The heat energy is heated and transported to the thermal storage module to heat the first energy storage particles transported from the second storage tank in the circulation pipeline to the thermal storage module; In the fluidized bed, heating the first energy storage particles using the heating module; transporting the first energy storage particles to the first storage tank through the circulation pipeline; 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; Based on the heat exchange between the first energy storage particles and the second energy storage particles in the fluidized bed, water in the water pipeline of the thermal energy application module is heated to generate steam.

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