Thermochemical energy storage device based on inductive heating and operation method thereof

Abstract

The invention belongs to the field of thermochemical energy storage, and discloses a thermochemical energy storage device based on inductive heating and an operation method thereof, the thermochemical energy storage device comprises a thermochemical reactor, an inductive heating reaction module and an inductive coil; an inner cavity of the thermal chemical reactor is sequentially divided into a preheating section, an inductance heating section and a cooling section from top to bottom, and the inductance heating reaction module is vertically arranged in the inductance heating section; the inductive heating reaction module comprises a plurality of annular cylinders and a steam inlet and outlet pipe, and the annular cylinders are coaxially arranged and sleeved at intervals; a heat exchange working medium channel is formed between every two adjacent annular cylinders; each annular cylinder body comprises a metal inner cylinder and a metal outer cylinder which are coaxial and sleeved at an interval, and an annular material channel is formed between the metal inner cylinder and the metal outer cylinder; the steam inlet and outlet pipes are vertically arranged in the annular material channel and are annularly distributed at intervals; the inductance coil is wound on the outer side of the thermal chemical reactor and is arranged in the area range of the inductance heating section; the rapid and uniform heating requirement in the thermochemical energy storage process is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermochemical energy storage, and in particular relates to a thermochemical energy storage device based on induction heating and an operating method thereof. Background Art

[0002] Thermochemical energy storage is a technology that uses reversible chemical reactions to store and release energy. In the energy storage process, thermal energy is converted into chemical energy through chemical reactions and stored, and in the energy release process, the chemical energy is converted back into thermal energy through reverse reactions and released.

[0003] At present, the energy storage process in thermochemical energy storage systems mainly uses electric heating to provide a heat source. That is, electric heaters such as heating resistors are used to directly heat the reactants to provide the activation energy required for the reaction, thereby promoting the forward reaction and storing thermal energy. However, conventional electric heating technology has a slow heating rate and poor heating uniformity, which cannot meet the rapid and uniform heating requirements of the thermochemical energy storage process. Summary of the Invention

[0004] In response to the technical problems existing in the prior art, the present invention provides a thermochemical energy storage device based on induction heating and its operation method to solve the technical problems that conventional electric heating technology has a slow heating rate and poor heating uniformity, which cannot meet the rapid and uniform heating requirements in the thermochemical energy storage process.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a thermochemical energy storage device based on induction heating, comprising a thermochemical reactor, an induction heating reaction module, and an induction coil; the inner cavity of the thermochemical reactor is divided into a preheating section, an induction heating section, and a cooling section from top to bottom, and the induction heating reaction module is vertically arranged in the induction heating section; The induction heating reaction module includes a plurality of annular cylinders and steam inlet and outlet pipes, wherein the plurality of annular cylinders are coaxially arranged and spaced apart; wherein a heat exchange medium channel is formed between two adjacent annular cylinders; Each annular cylinder includes a coaxial metal inner cylinder and a metal outer cylinder that are spaced apart, and an annular material channel is formed between the metal inner cylinder and the metal outer cylinder; the steam inlet and outlet pipes are vertically arranged in the annular material channel and are distributed in an annular pattern; the induction coil is wound around the outside of the thermochemical reactor and placed in the area of the induction heating section.

[0006] Furthermore, the steam inlet and outlet pipes are insulating ceramic pipes, and a plurality of steam holes are opened on the pipe wall of the insulating ceramic pipe.

[0007] Furthermore, a first heat exchange device is provided in the preheating section, and a second heat exchange device is provided in the cooling section; wherein the inlet of the first heat exchange device is connected to the outlet of the second heat exchange device.

[0008] Furthermore, it also includes a circulation pump; the circulation pump is arranged between the inlet of the first heat exchange device and the outlet of the second heat exchange device.

[0009] Furthermore, a heat exchange medium inlet and a heat exchange medium outlet are provided on the side wall of the thermochemical reactor. The heat exchange medium inlet is connected to the bottom end of the heat exchange medium channel, and the heat exchange medium outlet is connected to the top end of the heat exchange medium channel.

[0010] Furthermore, a steam inlet and outlet are provided on the side wall of the thermochemical reactor, and the steam inlet and outlet are connected to the steam inlet and outlet pipes.

[0011] Furthermore, it also includes a top silo, a bottom silo and a material conveyor; A material inlet is provided at the top of the thermochemical reactor, and a material outlet is provided at the bottom of the thermochemical reactor; the outlet of the top silo is connected to the material inlet, and the inlet of the bottom silo is connected to the material outlet, and the material conveyor is provided between the outlet of the bottom silo and the inlet of the top silo.

[0012] Furthermore, it also includes an electromagnetic shielding cover; the electromagnetic shielding cover is arranged on the outside of the inductor coil.

[0013] Furthermore, the surfaces of the metal inner cylinder and the metal outer cylinder are both provided with a plurality of heat exchange fin structures.

[0014] The present invention also provides an operating method of a thermochemical energy storage device based on induction heating, comprising: Energy storage process: Based on the principle of electromagnetic induction, the annular cylinder is heated by an induction coil, causing the thermochemical heat storage material inside the annular cylinder to decompose and complete the energy storage process. The steam generated by the decomposition of the thermochemical heat storage material is discharged through the steam inlet and outlet pipes. Energy release process: The steam participating in the thermochemical reaction is introduced into the annular cylinder through the steam inlet and outlet pipes, so that the steam participating in the thermochemical reaction undergoes a thermochemical reaction with the thermochemical heat storage material in the annular cylinder and releases heat. The released heat is transferred to the outside of the thermochemical reactor through the heat exchange medium flowing through the heat exchange medium channel, completing the energy release process.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The thermochemical energy storage device based on induction heating provided by the present invention is a device that vertically arranges an induction heating reaction module comprising a plurality of coaxially spaced annular cylinders that form a heat exchange working medium channel in the induction heating section of the thermochemical reactor. Based on the principle of electromagnetic induction, the metal inner cylinder and the metal outer cylinder in the induction heating reaction module are heated by an induction coil, so that the thermochemical heat storage material is thermally decomposed in the annular material channel to realize a thermochemical energy storage reaction. This device not only realizes the efficient heating of the thermochemical heat storage material by induction, but also the reasonable arrangement of the annular cylinder structure and the steam inlet and outlet pipes is conducive to enhancing heat exchange, facilitating the rapid export or import of the steam generated by the reaction and the steam participating in the reaction, thereby improving the thermochemical energy storage efficiency. The device has a compact structure and can effectively improve the overall performance of the device, meeting the requirements of rapid and uniform heating in the thermochemical energy storage process. Specifically, through induction heating, electrical energy can be directly and efficiently converted into thermal energy for driving thermochemical reactions, with higher energy conversion efficiency and faster heating. speed, significantly improving the uniformity of heating the thermochemical heat storage material; the annular cylinder design in the induction heating reaction module, especially the heat exchange medium channel formed between the two adjacent annular cylinders, and the annular material channel formed between the metal inner cylinder and the metal outer cylinder, greatly increase the heat exchange area, improve the heat exchange efficiency and uniformity; the steam inlet and outlet pipes are distributed in an annular material channel in an annular manner, which helps to quickly discharge the steam generated during the energy storage process; at the same time, during the energy release process, the steam participating in the thermochemical reaction is introduced into the annular cylinder through the steam inlet and outlet pipes to ensure the reaction efficiency of the steam and the thermochemical heat storage material; secondly, the induction coil is wound around the outside of the thermochemical reactor and placed in the area of the induction heating section, so that the induction coil can directly heat the induction heating section, reducing heat loss and improving heating efficiency; at the same time, the induction heating method has the characteristics of fast heating speed and precise temperature control, which helps to maintain temperature stability and uniformity during the thermochemical reaction.

[0016] Furthermore, by setting a first heat exchange device in the preheating section, setting a second heat exchange device in the cooling section, and connecting the inlet of the first heat exchange device and the outlet of the second heat exchange device, it is possible to recover the heat of the cooling section material, heat the thermochemical reaction material to the initial temperature of the preheating section, and improve the system utilization efficiency.

[0017] Furthermore, an electromagnetic shield is provided on the outside of the inductor to reduce the electromagnetic radiation and loss of the inductor, thereby improving the electrothermal conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic structural diagram of a thermochemical energy storage device based on induction heating provided in an embodiment; Figure 2 2 is a cross-sectional view of the inductive heating reaction module in the embodiment.

[0019] Among them, 1 is a thermochemical reactor, 2 is an inductive heating reaction module, 3 is an inductive coil, 4 is a first heat exchange device, 5 is a second heat exchange device, 6 is a circulating pump, 7 is a top silo, 8 is a bottom silo, 9 is a material conveyor, 10 is an inductive power control module, 11 is an electromagnetic shielding cover; 101 is a preheating section, 102 is an inductive heating section, 103 is a cooling section, 104 is a heat exchange medium inlet, 105 is a heat exchange medium outlet, 106 is a steam inlet and outlet; 201 is a metal inner tube, 202 is a metal outer tube, 203 is a steam inlet and outlet pipe; 204 is a heat exchange medium channel, 205 is an annular material channel. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions, and beneficial effects solved by this application more clearly understood, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application; it is obvious that the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of this application.

[0021] The present invention provides a thermochemical energy storage device based on inductive heating, comprising a thermochemical reactor 1, an inductive heating reaction module 2 and an inductive coil 3; the inner cavity of the thermochemical reactor 1 is divided into a preheating section 101, an inductive heating section 102 and a cooling section 103 from top to bottom, and the inductive heating reaction module 2 is vertically arranged in the inductive heating section 102; the inductive heating reaction module 2 comprises a plurality of annular cylinders and steam inlet and outlet pipes 203, and the plurality of annular cylinders are coaxially arranged and spaced apart; wherein a heat exchange medium channel 204 is formed between two adjacent annular cylinders; each annular cylinder comprises a coaxial and spaced apart metal inner cylinder 201 and a metal outer cylinder 202, and an annular material channel 205 is formed between the metal inner cylinder 201 and the metal outer cylinder 202; the steam inlet and outlet pipes 203 are vertically arranged in the annular material channel 205 and are distributed in an annular manner; the inductive coil 3 is wound around the outside of the thermochemical reactor 1 and placed in the area of the inductive heating section 102.

[0022] The thermochemical energy storage device based on inductive heating described in the present invention arranges a vertical inductive heating reaction module in a thermochemical reactor, and its several coaxially spaced annular cylinders form an annular material channel. Combined with the annularly spaced steam inlet and outlet pipes, the thermochemical heat storage material can fully exchange heat and react in the annular material channel; at the same time, the inductive coil is wound around the outside of the thermochemical reactor and placed in the inductive heating section area, which can accurately act on the inductive heating section, not only effectively utilizing the space, but also allowing the inductive heating energy to act more concentratedly on the thermochemical heat storage material, thereby improving the efficiency of inductive heating; secondly, the coaxially spaced arrangement of the annular cylinders and the flow mode of the material in the annular material channel can make the material more evenly heated during the heating process, thereby improving the uniformity of the inductive heating and ensuring the stable and efficient operation of the thermochemical energy storage device.

[0023] Example As attached Figure 1-2 As shown, this embodiment provides a thermochemical energy storage device based on induction heating, including a thermochemical reactor 1, an induction heating reaction module 2, an induction coil 3, a first heat exchange device 4, a second heat exchange device 5, a circulation pump 6, a top silo 7, a bottom silo 8, a material conveyor 9, an induction power control module 10 and an electromagnetic shielding cover 11.

[0024] The thermochemical reactor 1 is a hollow reaction device, and a material inlet is provided at the top end of the thermochemical reactor 1, and a material outlet is provided at the bottom end of the thermochemical reactor 1; wherein, the material inlet is used for the thermochemical heat storage material to enter the inner cavity of the thermochemical reactor 1, and the material outlet is used for the thermochemical heat storage material to flow out of the inner cavity of the thermochemical reactor 1; preferably, the thermochemical heat storage material is a calcium hydroxide / calcium oxide heat storage material system.

[0025] The inner cavity of the thermochemical reactor 1 is divided into a preheating section 101, an induction heating section 102 and a cooling section 103 from top to bottom; the top of the preheating section 101 is connected to the material inlet for preheating the thermochemical heat storage material; the two ends of the induction heating section 102 are respectively connected to the preheating section 101 and the cooling section 103 for providing space for the thermochemical heat storage material to perform heat storage reaction or heat release reaction; the bottom end of the cooling section 103 is connected to the material outlet for cooling the thermochemical heat storage material; wherein, within the area of the induction heating section 102, the shell of the thermochemical reactor 1 is built with temperature-resistant heat storage bricks to prevent the shell of the thermochemical reactor 1 from being heated due to the induction effect.

[0026] The inductive heating reaction module 2 is vertically arranged in the inductive heating section 102, and the inductive heating reaction module 2 includes a plurality of annular cylinders and a steam inlet and outlet pipe 203; the plurality of annular cylinders are coaxially arranged and spaced apart, and a heat exchange medium channel 204 is formed between two adjacent annular cylinders; specifically, when two adjacent annular cylinders are coaxially arranged and spaced apart, a heat exchange medium channel 204 is formed between the outer surface of one annular cylinder and the inner surface of the other annular cylinder, and the heat exchange medium channel 204 is used as a circulation channel for the heat exchange medium during the energy release process.

[0027] Each annular cylinder includes a coaxial and spaced metal inner cylinder 201 and a metal outer cylinder 202, and an annular material channel 205 is formed between the metal inner cylinder 201 and the metal outer cylinder 202; wherein, the annular material channel 205 is the enclosed space between the outer surface of the metal inner cylinder 201 and the inner surface of the metal outer cylinder 202, and the annular material channel 205 serves as a space for the thermochemical heat storage material to undergo thermal decomposition reaction and hydration reaction; preferably, the metal inner cylinder 201 and the metal outer cylinder 202 are both made of stainless steel; the surfaces of the metal inner cylinder 201 and the metal outer cylinder 202 are smooth surfaces, or the surfaces of the metal inner cylinder 201 and the metal outer cylinder 202 are both provided with a plurality of heat exchange fin structures to increase the heat exchange area and achieve the effect of enhanced heat exchange.

[0028] The steam inlet and outlet pipes 203 are vertically arranged in the annular material channel 205 and are distributed in an annular pattern; wherein, the steam inlet and outlet pipes 203 are insulating ceramic tubes; the interior of the insulating ceramic tube is hollow, and a plurality of steam through holes are opened on the tube wall; one end of the steam through hole 205 is connected to the outer tube wall of the insulating ceramic tube, and the other end of the steam through hole 205 is connected to the inner tube wall of the insulating ceramic tube; the steam through hole is used to discharge the steam generated by the heating of the thermochemical heat storage material or to introduce the steam participating in the thermochemical reaction into the annular material channel 205.

[0029] A heat exchange medium inlet 104 and a heat exchange medium outlet 105 are provided on the side wall of the thermochemical reactor 1. The heat exchange medium inlet 104 is arranged near the top of the inductive heating reaction module 2, and the heat exchange medium outlet 105 is arranged near the bottom of the inductive heating reaction module 2; the heat exchange medium inlet 104 is connected to the bottom end of the heat exchange medium channel 204, and the heat exchange medium outlet 105 is connected to the top end of the heat exchange medium channel 204, so that the heat exchange medium enters the heat exchange medium channel 204 from the heat exchange medium inlet 104, flows upward along the heat exchange medium channel 204, and then flows out through the heat exchange medium outlet 105, so that the heat exchange medium in the heat exchange medium channel 204 and the thermochemical heat storage material in the annular material channel 205 form a countercurrent, thereby enhancing the heat exchange effect between the heat exchange medium and the thermochemical heat storage material.

[0030] A steam inlet and outlet 105 is provided on the side wall of the thermochemical reactor 1. The steam inlet and outlet 105 is located in the side wall of the inductive heating section 102 and is connected to the steam inlet and outlet pipe 203. The steam inlet and outlet 105 is used to discharge the steam generated by the decomposition of the thermochemical heat storage material to the outside of the thermochemical reactor 1 and to pass the steam involved in the thermochemical reaction into the thermochemical reactor 1.

[0031] The inductive coil 3 is wound around the outside of the thermochemical reactor 1 and placed in the area of the inductive heating section 102. Specifically, within the area of the inductive heating section 102, the inductive coil 3 is wound around the outside of the thermochemical reactor 1 to utilize the principle of electromagnetic induction so that the metal inner cylinder 201 and the metal outer cylinder 202 in the inductive heating section 102 are heated themselves, thereby heating the thermochemical heat storage material between the metal inner cylinder 201 and the metal outer cylinder 202, thereby converting electrical energy into thermal energy. The two ends of the inductive coil 3 are connected to the inductive power control module 10, and the inductive power control module 10 is used to adjust the power of the inductive coil 2 to meet different inductive heating requirements. The power supply end of the inductive power control module 10 is connected to the abandoned power of new energy or the peak-shaving power of the thermal power unit.

[0032] The first heat exchange device 4 is arranged in the preheating section 101, and the first heat exchange device 4 is used to preheat the thermochemical heat storage material in the preheating section 101; the second heat exchange device 5 is arranged in the cooling section 103, and the second heat exchange device 5 is used to cool the thermochemical heat storage material in the cooling section 103; wherein, the inlet of the first heat exchange device 4 is connected to the outlet of the second heat exchange device 5; the circulating pump 6 is arranged between the inlet of the first heat exchange device 4 and the outlet of the second heat exchange device 5, the inlet of the circulating pump 6 is connected to the outlet of the second heat exchange device 5, and the outlet of the circulating pump 6 is connected to the inlet of the first heat exchange device 4.

[0033] The top silo 7 is arranged at the top of the thermochemical reactor 1, and the outlet of the top silo 7 is connected to the material inlet; the bottom silo 8 is arranged at the bottom of the thermochemical reactor 1, and the inlet of the bottom silo 8 is connected to the material outlet; the material conveyor 9 is arranged between the outlet of the bottom silo 8 and the inlet of the top silo 7, and is used to convey the thermochemical heat storage material stored in the bottom silo 8 to the top silo 7; wherein, the inlet of the material conveyor 9 is connected to the outlet of the bottom silo 8, and the outlet of the material conveyor 9 is connected to the inlet of the top silo 7.

[0034] The electromagnetic shielding cover 11 is disposed outside the inductor 2 to reduce electromagnetic radiation and loss of the inductor 2 , thereby improving the electrothermal conversion efficiency.

[0035] Working principle and operation method: The thermochemical energy storage device based on induction heating described in this embodiment, when in operation, includes: (1) Energy storage process: Based on the principle of electromagnetic induction, the annular cylinder is heated by the inductor coil 3 so that the thermochemical heat storage material in the annular cylinder is thermally decomposed to complete the energy storage process; wherein, the steam generated by the thermal decomposition of the thermochemical heat storage material is discharged through the steam inlet and outlet pipe 203.

[0036] Specifically, the energy storage process includes: The abandoned electricity from new energy sources or the peak-shaving electricity from thermal power units is connected to the inductive power control module 10, which is started and begins to be heated using the inductive coil 3 to uniformly heat the metal inner cylinder 201 and the metal outer cylinder 202 in the inductive heating reaction module 2. The metal inner cylinder 201 and the metal outer cylinder 202 are then used to heat the thermochemical energy storage material in the annular material channel 205, causing the thermochemical heat storage material to be thermally decomposed, converting electrical energy into chemical energy of the thermochemical heat storage material. During the thermal decomposition of the thermochemical heat storage material, the steam generated is discharged from the steam inlet and outlet pipe 203. When the thermochemical heat storage material in the inductive heating section 102 completes thermal decomposition, it is discharged into the bottom silo 8 through the material outlet. Then, the material in the top silo 7 is passed into the thermochemical reactor 1, realizing a heating and energy storage process with large-capacity heat storage.

[0037] (2) Energy release process: The steam participating in the thermochemical reaction is introduced into the annular cylinder through the steam inlet and outlet pipes, so that the steam participating in the thermochemical reaction undergoes a thermochemical reaction with the thermochemical heat storage material in the annular cylinder and releases heat. The released heat is transferred to the outside of the thermochemical reactor 1 through the heat exchange medium flowing through the heat exchange medium channel 204, completing the energy release process.

[0038] Specifically, the energy release process includes: The material in the bottom silo 8 is transferred to the top silo by a material conveyor, and the material in the top silo then enters the interior of the thermochemical reactor 1. The steam participating in the thermochemical reaction is introduced into the annular cylinder through the steam inlet and outlet pipes, so that the steam participating in the thermochemical reaction undergoes a thermochemical reaction with the thermochemical heat storage material in the annular cylinder and releases heat. The released heat is introduced into the heat exchange working medium channel through the heat exchange working medium, and the heat generated by the heat release is quickly taken out.

[0039] The thermochemical energy storage device based on inductive heating described in this embodiment is configured by vertically arranging the inductive heating reaction module in the inductive heating section of the thermochemical reactor, and providing a heat exchange medium channel and an annular material channel in the inductive heating reaction module. Uniform inductive heating is adopted, and the channel is selected as the heating element. It has the advantages of a large heat exchange area and uniform temperature, which is conducive to the rapid and uniform heating of thermochemical materials.

[0040] In this embodiment, the inductive heating has a fast heating rate and can absorb the abandoned electricity of new energy or the peak-shaving electricity of thermal power; when the device is in operation, it can realize the rapid energy storage of batch thermochemical materials and achieve the matching of heating power and heating capacity; by setting the preheating section and the cooling section, reasonable heat utilization is achieved and the heat conversion efficiency is high; by opening steam holes on the wall of the insulating ceramic tube, the steam generated in the heat storage process is discharged and the reaction steam is evenly introduced into the heat release process; by setting an electromagnetic shielding cover in the area of the inductive heating section, the electric heat conversion efficiency is improved and the electromagnetic radiation and loss are reduced; in the heat storage process, the heat of the material in the cooling section is transferred to the circulating working fluid in the cooling section and the preheating section through the circulating pump, and the heat of the cooling section is transported to the preheating section to improve system efficiency.

[0041] The thermochemical energy storage device based on inductive heating described in the present invention adopts the heating principle of induction, and annular cylinders made of stainless steel are coaxially and spaced apart in the inductive heating section of the thermochemical reactor. An annular working fluid channel is set inside each annular cylinder, and a heat exchange working fluid channel is formed between two adjacent annular cylinders. During the energy storage process, the inductive coil uniformly heats the annular cylinder with a larger surface area, so that the thermochemical heat storage material inside it is quickly heated and decomposed to realize the energy storage process; during the energy release process, the heat released by the thermochemical process is quickly conducted to the heat exchange working fluid through the annular cylinder with a larger surface area, thereby realizing the transfer of energy release heat.

[0042] In the present invention, electrical energy can be directly and efficiently converted into thermal energy for driving thermochemical reactions through inductive heating. The inner cavity of the thermochemical reactor is divided into a preheating section, an inductive heating section, and a cooling section. The material can be preliminarily heated in the preheating section to reduce the burden on the inductive heating section. In the cooling section, the material temperature can be quickly lowered after the reaction to facilitate subsequent processing or storage. The annular cylinder design in the inductive heating reaction module, especially the heat exchange medium channel formed between two adjacent annular cylinders, and the annular material channel formed between the metal inner cylinder and the metal outer cylinder, greatly increase the heat exchange area and improve the heat exchange efficiency.

[0043] In the present invention, the steam inlet and outlet pipes are distributed in an annular shape at intervals in the annular material channel. Steam and other heat exchange media can be introduced through the steam inlet and outlet pipes to exchange heat with the material in the annular material channel, which helps to discharge the steam generated in the heat storage process and evenly enter the reaction steam in the heat release process, further promoting the heating and reaction process of the material; the induction coil is wound around the outside of the thermochemical reactor and placed in the area of the induction heating section, so that the induction coil can directly heat the induction heating section, reducing heat loss and improving heating efficiency; since the induction heating method has the characteristics of non-contact heating, the direct contact between the heating element and the material is reduced, thereby reducing the risk of wear and corrosion of the equipment and extending the service life of the equipment.

[0044] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention.

Claims

1. A thermochemical energy storage device based on induction heating, characterized in that: It comprises a thermochemical reactor (1), an inductive heating reaction module (2) and an inductive coil (3); the inner cavity of the thermochemical reactor (1) is divided into a preheating section (101), an inductive heating section (102) and a cooling section (103) from top to bottom, and the inductive heating reaction module (2) is vertically arranged in the inductive heating section (102); The induction heating reaction module (2) comprises a plurality of annular cylinders and steam inlet and outlet pipes (203), wherein the plurality of annular cylinders are coaxially arranged and spaced apart; wherein a heat exchange medium channel (204) is formed between two adjacent annular cylinders; Each annular cylinder comprises a coaxial metal inner cylinder (201) and a metal outer cylinder (202) which are spaced apart and sleeved together, wherein an annular material channel (205) is formed between the metal inner cylinder (201) and the metal outer cylinder (202); the steam inlet and outlet pipes (203) are vertically arranged in the annular material channel (205) and are distributed in an annular manner; and the induction coil (3) is wound around the outside of the thermochemical reactor (1) and is placed in the region of the induction heating section (102).

2. A thermochemical energy storage device based on induction heating according to claim 1, characterized in that: The steam inlet and outlet pipe (203) is an insulating ceramic pipe, and a plurality of steam holes are provided on the wall of the insulating ceramic pipe.

3. A thermochemical energy storage device based on induction heating according to claim 1, characterized in that: A first heat exchange device (4) is provided in the preheating section (101), and a second heat exchange device (5) is preset in the cooling section (103); wherein the inlet of the first heat exchange device (4) is connected to the outlet of the second heat exchange device (5).

4. A thermochemical energy storage device based on induction heating according to claim 3, characterized in that: It also includes a circulation pump (6); the circulation pump (6) is arranged between the inlet of the first heat exchange device (4) and the outlet of the second heat exchange device (5).

5. The thermochemical energy storage device based on induction heating according to claim 1, characterized in that: A heat exchange medium inlet (104) and a heat exchange medium outlet (105) are provided on the side wall of the thermochemical reactor (1); the heat exchange medium inlet (104) is communicated with the bottom end of the heat exchange medium channel (204); and the heat exchange medium outlet (105) is communicated with the top end of the heat exchange medium channel (204).

6. The thermochemical energy storage device based on induction heating according to claim 1, characterized in that: A steam inlet and outlet (105) is provided on the side wall of the thermochemical reactor (1), and the steam inlet and outlet (105) is connected to the steam inlet and outlet pipe (203).

7. The thermochemical energy storage device based on induction heating according to claim 1, characterized in that: It also includes a top silo (7), a bottom silo (8) and a material conveyor (9); The top of the thermochemical reactor (1) is provided with a material inlet, and the bottom of the thermochemical reactor (1) is provided with a material outlet; the outlet of the top silo (7) is connected to the material inlet, the inlet of the bottom silo (8) is connected to the material outlet, and the material conveyor (9) is provided between the outlet of the bottom silo (8) and the inlet of the top silo (7).

8. The thermochemical energy storage device based on induction heating according to claim 1, characterized in that: It also includes an electromagnetic shielding cover (11); the electromagnetic shielding cover (11) is arranged outside the inductor coil (3).

9. The thermochemical energy storage device based on induction heating according to claim 1, characterized in that: The surfaces of the metal inner cylinder (201) and the metal outer cylinder (202) are both provided with a plurality of heat exchange fin structures.

10. The method for operating a thermochemical energy storage device based on induction heating according to any one of claims 1 to 9, characterized in that: include: Energy storage process: Based on the principle of electromagnetic induction, the annular cylinder is heated by an induction coil (3), so that the thermochemical heat storage material in the annular cylinder is thermally decomposed to complete the energy storage process; wherein, steam generated by the thermal decomposition of the thermochemical heat storage material is discharged through the steam inlet and outlet pipe (203); Energy release process: The steam participating in the thermochemical reaction is introduced into the annular cylinder through the steam inlet and outlet pipes, so that the steam participating in the thermochemical reaction undergoes a thermochemical reaction with the thermochemical heat storage material in the annular cylinder and releases heat. The released heat is transferred to the outside of the thermochemical reactor (1) through the heat exchange medium flowing through the heat exchange medium channel (204), completing the energy release process.

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