A thermo-chemical heat storage device

Abstract

This invention discloses a thermochemical heat storage device, comprising a tank with a circulating water inlet and a feed inlet on one side of its top, and a water outlet and a discharge outlet on the bottom side away from the circulating water inlet and feed inlet; a stirring structure including a central rotating shaft, a planetary carrier, and a planetary stirring frame rotatably mounted in the tank; the planetary stirring frame being arranged parallel to the central rotating shaft, and the two ends of the planetary stirring frame and the central rotating shaft being connected through the planetary carrier; the planetary stirring frame and the central rotating shaft being connected by gear transmission; the central rotating shaft having a hollow structure with a steam inlet at one end and a nozzle on the central rotating shaft; and a hot steam recovery structure, the steam inlet of which is connected to the tank. This invention adopts a multi-layer structure design, with the tank wall respectively equipped with a flow heat exchange layer and an electromagnetic heating coil, responsible for carrying away heat during the exothermic process of calcium-based thermochemical reaction and providing heat for the endothermic thermochemical reaction, respectively, realizing integrated heat storage and release.

Description

Technical Field

[0001] This invention relates to the field of thermochemical thermal energy storage technology, specifically to a calcium-based thermochemical energy storage device that integrates heat storage and release. Background Technology

[0002] Thermal energy storage technologies are classified into three types based on their heat storage principles: sensible heat storage, latent heat storage, and thermochemical energy storage. Compared to sensible and latent heat storage systems, thermochemical thermal energy storage systems have several significant advantages:

[0003] 1) High energy storage density: Because chemical reactions often involve the absorption or release of a large amount of heat, the energy storage density of thermochemical heat storage can be several to tens of times higher than that of the other two heat storage methods.

[0004] 2) Low heat loss because heat is stored in the form of chemical energy, and the working fluid can exist stably for a long time;

[0005] 3) It can meet the requirements of long-term thermal energy storage and long-distance transportation. The reactor is an important piece of equipment in the thermochemical energy storage system, and it is also one of the main challenges to the promotion of the thermochemical energy storage system.

[0006] In calcium-based thermochemical energy storage systems, the reaction involves both gas and solid phases, and solid particles have poor thermal conductivity. Therefore, enhancing heat transfer within the bed and promoting mixing of gas and solid reactants to ensure complete reaction are key issues for improving reactor performance. Commonly used reactors include fixed-bed and fluidized-bed reactors, both of which are relatively mature in development. In a fixed-bed reactor, solid particles accumulate and remain stationary in the bed, while gas flows through the bed to carry out the reaction. When the gas velocity increases to a certain level, the particles are lifted by the gas, creating a fluidized bed. Furthermore, because calcium-based materials require high-temperature calcination, and rotary kilns are widely used in industries such as cement and metals for calcination, some studies have also used rotary kilns as reactors.

[0007] Fixed-bed reactors are easy to manufacture and have a simple structure and operation, making them widely used in industrial production. However, they also have disadvantages such as large volume and poor thermal conductivity. For calcium-based thermochemical energy storage systems, when reactants are fixed in the bed, poor heat transfer performance increases the non-uniformity of the temperature field distribution and exacerbates sintering problems. Furthermore, fixed beds have limited heat storage capacity and make it difficult to remove reactants for long-term storage or transfer. Fluidized beds offer better heat and mass transfer performance than fixed beds, but the gas flow state in a fluidized bed deviates significantly from the ideal plug flow, easily leading to channeling, backmixing, and other problems, reducing reaction conversion rates. In addition, particles are still confined within the bed, resulting in limited capacity, and the large volume required to provide fluidization space for solid particles necessitates strict control over gas flow rates.

[0008] The advantages of rotary kiln reactors are that they are relatively mature, operate reliably at high temperatures, and are suitable for reaction materials with large particle sizes. However, in terms of enhancing heat and mass transfer, due to the low rotation speed of the rotary kiln reactor and the single movement mode of particles in the reactor, it cannot provide sufficient mixing for the synthesis reaction of gas and solid phases. Therefore, current rotary kiln reactors are mainly designed for chemical reactions that absorb heat and cannot realize the cyclic reaction of energy storage and release. Summary of the Invention

[0009] The purpose of this invention is to overcome the defects in the existing technology and provide an integrated calcium-based thermochemical energy storage device that stores and releases heat. It aims to realize the cyclic reaction of energy storage and release, while improving the fluidity of particles and the overall permeability of the calcium-based thermochemical reaction process, reducing particle agglomeration and material sintering, enhancing heat transfer, and making the reaction more uniform.

[0010] To achieve the above objectives, the technical solution of the present invention is to design a thermochemical thermal storage device, which includes...

[0011] The tank body has a circulating water inlet and a feed inlet on one side of its top, and a water outlet and a discharge outlet on the side of its bottom away from the circulating water inlet and the feed inlet.

[0012] The stirring structure includes a central rotating shaft, a planetary carrier, and a planetary stirring frame rotatably mounted inside the tank. The planetary stirring frame is arranged parallel to the central rotating shaft, and the two ends of the planetary stirring frame and the central rotating shaft are connected through the planetary carrier. The planetary stirring frame and the central rotating shaft are connected by gear transmission. The central rotating shaft has a hollow structure and one end is a steam inlet. The central rotating shaft is provided with a nozzle.

[0013] The heat steam recovery structure has its air inlet connected to the tank.

[0014] Furthermore, the planetary stirrer includes a rotating disk, a stirring shaft, a support, and stirring blades mounted on the stirring shaft via the support. Gear grooves are provided on the inner wall of the tank. Both ends of the stirring shaft are mounted on the planetary stirrer. The rotating disk is sleeved on the stirring shaft. Gear teeth are provided on the outer circumference of the rotating disk. A gear is sleeved on the central rotating shaft. One side of the rotating disk is located in the gear groove, and the other side is connected to the central rotating shaft through gear meshing.

[0015] Furthermore, the heat steam recovery structure includes a steam output pipe, a discharge valve, a material separation cylinder, a cyclone separator, a Y-type filter, a steam output valve, a heat exchange steam valve, and a steam storage spherical tank. The cyclone separator is connected to the tank body through the steam output pipe and the steam output valve. One end of the cyclone separator is connected to the Y-type filter. The material outlet end of the cyclone separator is connected to the material separation cylinder. The material separation cylinder is connected to the tank body through a pipe and the discharge valve. The Y-type filter is connected to the steam storage spherical tank through the heat exchange steam valve and the pipe.

[0016] Furthermore, it also includes a spherical tank steam outlet valve, a heat exchanger, a water treatment device, a first return water valve, an outlet water valve, a hot water storage tank, and a cold water tank. The heat exchanger is connected to the spherical tank via the spherical tank steam outlet valve and a pipeline, and is also connected to the hot water storage tank via a pipeline and an outlet water valve. The heat exchanger is connected to the water treatment device via the first return water valve and a pipeline, and the water treatment device is connected to the cold water tank via a pipeline and a second return water valve. The heat exchanger enters the water treatment device through the first return water valve, is treated, and then returns to the cold water tank.

[0017] The cold water tank is connected to the circulating water inlet via an inlet valve and a pipe. The circulating water inlet is connected to the flow heat exchange layer, and the outlet is connected to the heat exchanger.

[0018] Furthermore, the stirring structure also includes telescopic steam injection bolts, and the nozzles on the central rotating shaft are symmetrically distributed from left to right, with telescopic steam injection bolts installed on both symmetrically arranged nozzles.

[0019] Furthermore, the two symmetrically arranged telescopic steam injection bolts are connected by a spring wire, and the telescopic steam injection bolts are provided with steam injection holes.

[0020] Furthermore, the stirring structure also includes a motor, and the central rotating shaft passes through the tank and is connected to the motor via a pulley.

[0021] Furthermore, the stirring blades have a spiral square tube structure.

[0022] Furthermore, the tank body includes an inner cylinder wall and an outer cylinder wall, and an electromagnetic heating coil and a flow heat exchange layer are arranged between the inner cylinder wall and the outer cylinder wall. The flow heat exchange layer is connected to the circulating water inlet and the water outlet.

[0023] An electromagnetic coil inlet is provided on the top of the tank opposite the feed inlet, and an electromagnetic coil outlet is provided on the bottom of the tank opposite the electromagnetic coil inlet. The two ends of the electromagnetic heating coil pass through the electromagnetic coil inlet and the electromagnetic coil outlet, respectively.

[0024] Furthermore, the inner side of the outer cylinder wall is sequentially covered with a heat-insulating wall surface and an insulating layer.

[0025] Furthermore, sealing device I and sealing device II are respectively provided at the connection points between the two ends of the central rotating shaft and the tank body.

[0026] The advantages and beneficial effects of this invention are as follows:

[0027] (1) The multi-layer structure design is adopted. The tank wall is equipped with a flow heat exchange layer and an electromagnetic heating coil, which are respectively responsible for carrying out heat during the exothermic process of calcium-based thermochemical reaction and providing heat for endothermic thermochemical reaction, so as to realize the integration of heat storage and release.

[0028] (2) The mechanical stirring of the planetary stirring rack in the tank ensures the fluidization state and uniform temperature distribution. At the same time, the hollow structure of the central rotating shaft allows for the injection of steam into the tank through the surface telescopic injection bolts, which improves the poor mixing and material blockage of the nozzles during the thermochemical process.

[0029] (3) A dual filtration system of cyclone separator and Y-type filter is adopted to filter the steam produced during the reaction process in a secondary manner, thereby reducing the clogging problem of steam precipitation. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a thermochemical thermal storage device according to the present invention;

[0031] Figure 2 This is a schematic diagram of the side structure of the stirring structure;

[0032] Figure 3 This is a schematic diagram of the sealing structure;

[0033] Figure 4 This is a schematic diagram of a telescopic steam injection bolt structure;

[0034] Figure 5 yes Figure 1 A magnified view of part A in the image.

[0035] In the diagram: Motor-1, Central Shaft-2, Sealing Device I-3, Planetary Mixer I-4, Outer Cylinder Wall-5, Electromagnetic Coil Outlet-6, Insulated Wall-7, Electromagnetic Heating Coil-8, Insulation Layer-9, Flow Heat Exchange Layer-10, Inner Cylinder Wall-11, Discharge Port-12, Water Outlet-13, Planetary Mixer-14, Steam Inlet-15, Sealing Device II-16, Telescopic Steam Injection Bolt-17, Gear Groove-18, Electromagnetic Coil Inlet-19, Discharge Valve-20, Material Separation Cylinder-21, Cyclone Separator-22, Y-Type Filter-2 3. Steam output valve - 24. Feed inlet - 25. Circulating water inlet - 26. Planetary mixer II - 27. Planetary mixer III - 28. Water inlet valve - 29. Cold water tank - 30. Hot water exchange valve - 31. Second return water valve - 32. Heat exchange steam valve - 33. Spherical tank steam outlet valve - 34. Steam storage spherical tank - 35. Heat exchanger - 36. Water treatment device - 37. First return water valve - 38. Water outlet valve - 39. Hot water storage tank - 40. Spring wire - 41. Steam injection hole - 42. Rotary disc - 43. Stirring shaft - 44. Support - 45. Stirring blade - 46. Detailed Implementation

[0036] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0037] like Figure 1-5 As shown, a thermochemical thermal storage device includes...

[0038] The tank body has a circulating water inlet 26 and a feed inlet 25 on one side of its top, and a water outlet 13 and a feed outlet 12 on the side of its bottom away from the circulating water inlet 26 and the feed inlet 25.

[0039] The stirring structure includes a central rotating shaft 2, a planetary carrier 14, and a planetary stirring frame rotatably mounted inside the tank. The planetary stirring frame is arranged parallel to the central rotating shaft 2, and the two ends of the planetary stirring frame and the central rotating shaft 2 are connected by the planetary carrier 14. The planetary stirring frame and the central rotating shaft 2 are connected by gear transmission. The central rotating shaft 2 has a hollow structure and one end is a steam inlet 15. The central rotating shaft 2 is provided with a nozzle.

[0040] The heat steam recovery structure has its air inlet connected to the tank.

[0041] In the above technical solution, preferably, there are three sets of planetary stirrers: planetary stirrer I 4, planetary stirrer II 27, and planetary stirrer III 28. The three sets of planetary stirrers are arranged at equal angles along the circumference outside the central rotating shaft 2. The central rotating shaft 2 and the three sets of planetary stirrers are connected by gear transmission, and the two are connected by planet carrier 14, ensuring that the planetary stirrers rotate on their own while revolving around the central rotating shaft 2. Through the mechanical stirring of the stirring structure, the particle flowability is significantly improved, ensuring uniform fluidization and temperature distribution, effectively preventing particle agglomeration and local high-temperature sintering, and improving reaction uniformity.

[0042] In addition, the central rotating shaft 2 is a hollow pipe, and steam is injected into the tank through the nozzle on the central rotating shaft 2 to mix with the material.

[0043] As a preferred embodiment of the above technical solution, the planetary stirrer includes a rotating disk 43, a stirring shaft 44, a support 45, and stirring blades 46 mounted on the stirring shaft via the support 45. A gear groove 18 is provided on the inner wall of the tank. Both ends of the stirring shaft 44 are mounted on the planetary carrier 14. The rotating disk 43 is sleeved and mounted on the stirring shaft 44. Gear teeth are provided on the outer circumference of the rotating disk 43. A gear is sleeved on the central rotating shaft 2. One side of the rotating disk 43 is located in the gear groove 18, and the other side is connected to the central rotating shaft 2 through gear meshing.

[0044] In the above technical solution, the stirring blade 46 has a spiral square tube structure. Forced mechanical stirring via the spiral square tube stirrer significantly improves particle flowability, ensures uniform fluidization and temperature distribution, effectively prevents particle agglomeration and localized high-temperature sintering, and enhances reaction uniformity.

[0045] As a preferred embodiment of the above technical solution, the heat steam recovery structure includes a steam output pipe, a discharge valve 20, a material separation cylinder 21, a cyclone separator 22, a Y-type filter 23, a steam output valve 24, a heat exchange steam valve 33, and a steam storage spherical tank 35. The cyclone separator 22 is connected to the tank body through the steam output pipe and the steam output valve 24. One end of the cyclone separator 22 is connected to the Y-type filter 23. The material outlet end of the cyclone separator 22 is connected to the material separation cylinder 21. The material separation cylinder 21 is connected to the tank body through a pipe and the discharge valve 20. The Y-type filter 23 is connected to the steam storage spherical tank 35 through the heat exchange steam valve 33 and a pipe.

[0046] In the above technical solution, a dual filtration system of cyclone separator and Y-type filter is set up to perform two-stage high-efficiency filtration of the steam generated by the reaction, which greatly reduces the material particles carried and effectively prevents blockage of downstream pipelines and equipment.

[0047] As a preferred embodiment of the above technical solution, it further includes a spherical tank steam outlet valve 34, a heat exchanger 36, a water treatment device 37, a first return water valve 38, a water outlet valve 39, a hot water storage tank 40, and a cold water tank 30. The heat exchanger 36 is connected to the steam storage spherical tank 35 via the spherical tank steam outlet valve 34 and a pipeline. The heat exchanger 36 is also connected to the hot water storage tank 40 via a pipeline and the water outlet valve 39. The heat exchanger 36 is connected to the water treatment device 37 via the first return water valve 38 and a pipeline. The water treatment device 37 is connected to the cold water tank 30 via a pipeline and a second return water valve 32. The heat exchanger 36 enters the water treatment device 37 through the first return water valve 38 for treatment and then returns to the cold water tank 30.

[0048] The cold water tank 30 is connected to the circulating water inlet 26 via the water inlet valve 29 and the pipe. The circulating water inlet 26 is connected to the flow heat exchange layer 10, and the water outlet 13 is connected to the heat exchanger 36.

[0049] The cold water tank 30 is connected to the heat exchanger 36 via pipes and a hot water valve 31.

[0050] As a preferred embodiment of the above technical solution, the stirring structure further includes a telescopic steam injection bolt 17, and the nozzles on the central rotating shaft 2 are symmetrically distributed from left to right, with a telescopic steam injection bolt 17 installed on each of the two symmetrically arranged nozzles.

[0051] As a preferred embodiment of the above technical solution, two symmetrically arranged telescopic steam injection bolts are connected by a spring wire 41, and the telescopic steam injection bolt 17 is provided with a steam injection hole 42.

[0052] As a preferred embodiment of the above technical solution, the stirring structure further includes a motor 1, and the central rotating shaft 2 passes through the tank and is connected to the motor 1 via a pulley.

[0053] As a preferred embodiment of the above technical solution, the tank body includes an inner cylinder wall 11 and an outer cylinder wall 5, and an electromagnetic heating coil 8 and a flow heat exchange layer 10 are arranged between the inner cylinder wall 11 and the outer cylinder wall 5. The flow heat exchange layer 10 is connected to the circulating water inlet 26 and the water outlet 13.

[0054] An electromagnetic coil inlet 19 is provided on the top of the tank opposite to the feed inlet 25, and an electromagnetic coil outlet 6 is provided on the bottom of the tank opposite to the electromagnetic coil inlet 19. The two ends of the electromagnetic heating coil 8 pass through the electromagnetic coil inlet 19 and the electromagnetic coil outlet 6, respectively.

[0055] In the above technical solution, the outer wall of the tank adopts a multi-layer design, with an independently configured flow heat exchange layer and electromagnetic heating coil layer, to achieve decoupling and optimization of heat transfer during the heat release / absorption process, thereby enhancing the overall heat transfer efficiency.

[0056] As a preferred embodiment of the above technical solution, the inner side of the outer cylinder wall 5 is sequentially covered with a heat-insulating wall surface 7 and an insulating layer 9.

[0057] As a preferred embodiment of the above technical solution, sealing device I3 and sealing device II16 are respectively provided at the connection points between the central rotating shaft and the tank body. Sealing device I3 and sealing device II16 adopt a labyrinth sealing structure to ensure airtightness.

[0058] The implementation principle of this invention is as follows:

[0059] The motor 1 drives the central shaft 2 to rotate via a pulley, providing power to the stirring structure. Among them, the three planetary stirring frames I 4, II 27, and III 28 form a planetary rotating stirring device, which is positioned in the tank through the gear groove 18 on the inner wall 11 of the tank. The central shaft 2 and the three planetary stirring frames are geared and connected by the planet carrier 14, ensuring that the planetary stirring frames rotate on their own while revolving around the central shaft 2.

[0060] External main steam is input into the central rotating shaft 2 from steam inlet 15. The central rotating shaft 2 is a hollow pipe, and the shaft end is sealed by labyrinth seal device I3 and seal device II16 to ensure airtightness. Steam is injected into the tank body through telescopic steam injection bolt 17 on the central rotating shaft 2 and mixes with the material.

[0061] The tank has a multi-layer structure, equipped with a flow heat exchange layer 10 and an electromagnetic heating coil 8, which are responsible for removing heat during the exothermic process of the calcium-based thermochemical reaction and providing heat for the endothermic thermochemical reaction, respectively. During the endothermic reaction, the steam produced enters the cyclone separator 22 through a steam output pipe and steam output valve 24. After preliminary separation, the steam passes through a Y-type filter 23 and enters the steam storage spherical tank 35 via the heat exchange steam valve 33 for storage. When needed, it flashes through the spherical tank's steam outlet valve 34 into the heat exchanger 36 for heat exchange, outputting the heat to the heat-consuming end or storing it in the hot water storage tank 40. Cooling water enters the water treatment device 37 through the first return water valve 38 and is then treated before returning to the cold water tank 30. The mixed materials enter the material bucket 21 and re-enter the reaction chamber for secondary reaction via the discharge valve 20. During the exothermic reaction, the low-temperature water in the cold water tank 30 enters the flow heat exchange layer 10 through the inlet valve 29 and the circulation inlet 26. The heat carried out is exchanged through the heat exchanger 36 and then stored in the hot water storage tank 40. The cooling water circuit is the same as that of the endothermic reaction.

[0062] Steam injection device inside the reactor, such as Figure 4 As shown, a nozzle is opened on the central rotating shaft 2. The outer diameter of the telescopic steam injection bolt 17 and the diameter of the nozzle are matched. The telescopic steam injection bolt 17 is symmetrically connected by spring wires 41. When steam is introduced, the high-pressure steam in the central rotating shaft 2 exerts pressure on the telescopic steam injection bolt 17 from the inside out, causing the telescopic steam injection bolt 17 to pop out and the steam to enter the tank. When no steam is introduced, the spring wires 41 and the material pressure in the tank cause the telescopic steam injection bolt 17 to press against the outer wall of the central rotating shaft to prevent the material from blocking the steam injection hole 42.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A thermochemical thermal storage device, characterized in that, It includes The tank body has a circulating water inlet (26) and a feed inlet (25) on one side of its top, and a water outlet (13) and a feed outlet (12) on the side of its bottom away from the circulating water inlet (26) and the feed inlet (25). The stirring structure includes a central rotating shaft (2), a planetary carrier (14), and a planetary stirring frame rotatably mounted inside the tank. The planetary stirring frame is arranged parallel to the central rotating shaft (2), and the two ends of the planetary stirring frame and the central rotating shaft (2) are connected through the planetary carrier (14). The planetary stirring frame and the central rotating shaft (2) are connected by gear transmission. The central rotating shaft (2) has a hollow structure and one end is a steam inlet (15). A nozzle is provided on the central rotating shaft (2). The heat steam recovery structure has its air inlet connected to the tank body; The heat steam recovery structure includes a steam output pipe, a discharge valve (20), a material separation cylinder (21), a cyclone separator (22), a Y-type filter (23), a steam output valve (24), a heat exchange steam valve (33), and a steam storage spherical tank (35). The cyclone separator (22) is connected to the tank body through the steam output pipe and the steam output valve (24). The cyclone separator (22) is connected to the Y-type filter (23). The material outlet end of the cyclone separator (22) is connected to the material separation cylinder (21). The material separation cylinder (21) is connected to the tank body through a pipe and the discharge valve (20). The Y-type filter (23) is connected to the steam storage spherical tank (35) through the heat exchange steam valve (33) and a pipe. The tank includes an inner cylinder wall (11) and an outer cylinder wall (5). An electromagnetic heating coil (8) and a flow heat exchange layer (10) are arranged between the inner cylinder wall (11) and the outer cylinder wall (5). The flow heat exchange layer (10) is connected to the circulating water inlet (26) and the water outlet (13). The stirring structure also includes telescopic steam injection bolts (17), and the nozzles on the central rotating shaft (2) are symmetrically distributed on the left and right, and telescopic steam injection bolts (17) are installed on the two symmetrically arranged nozzles. Two symmetrically arranged telescopic steam injection bolts are connected by a spring wire (41), and the telescopic steam injection bolts (17) are provided with steam injection holes (42).

2. The thermochemical thermal storage device according to claim 1, characterized in that, The planetary mixer includes a rotating disk (43), a stirring shaft (44), a support (45), and stirring blades (46) mounted on the stirring shaft (44) via the support (45). A gear groove (18) is provided on the inner wall of the tank. Both ends of the stirring shaft (44) are mounted on the planetary carrier (14). The rotating disk (43) is sleeved on the stirring shaft (44). Gear teeth are provided on the outer circumference of the rotating disk (43). A gear is sleeved on the central rotating shaft (2). One side of the rotating disk (43) is located in the gear groove (18), and the other side is connected to the central rotating shaft (2) through gear meshing.

3. The thermochemical thermal storage device according to claim 1, characterized in that, It also includes a spherical tank steam outlet valve (34), a heat exchanger (36), a water treatment device (37), a first return water valve (38), a water outlet valve (39), a hot water storage tank (40), a water inlet valve (29), a cold water tank (30), and a second return water valve (32). The heat exchanger (36) is connected to the steam storage spherical tank (35) through the spherical tank steam outlet valve (34) and a pipeline. The heat exchanger (36) is connected to the hot water storage tank (40) through a pipeline and a water outlet valve (39). The heat exchanger (36) is connected to the water treatment device (37) through the first return water valve (38) and a pipeline. The water treatment device (37) is connected to the cold water tank (30) through a pipeline and a second return water valve (32). The cold water tank (30) is connected to the circulating water inlet (26) via the water inlet valve (29) and the pipe. The circulating water inlet (26) is connected to the flow heat exchange layer (10). The water outlet (13) is connected to the heat exchanger (36).

4. The thermochemical thermal storage device according to claim 1, characterized in that, An electromagnetic coil inlet (19) is provided on the top of the tank opposite to the feed inlet (25), and an electromagnetic coil outlet (6) is provided on the bottom of the tank opposite to the electromagnetic coil inlet (19). The two ends of the electromagnetic heating coil (8) pass through the electromagnetic coil inlet (19) and the electromagnetic coil outlet (6) respectively.

5. A thermochemical thermal storage device according to claim 4, characterized in that, The inner side of the outer cylinder wall (5) is sequentially covered with a heat-insulating wall surface (7) and an insulating layer (9).

6. A thermochemical thermal storage device according to claim 1, characterized in that, The central rotating shaft is equipped with sealing device I (3) and sealing device II (16) at the connection points between its two ends and the tank body.

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