Thermal chemical energy storage device and method for centralized heat storage, dispersion and heat release

By using thermochemical energy storage devices in the industrial park and using the conversion of Ca(OH)2 and CaO materials, the steam supply problem of dispersing heat users is solved, efficient and flexible steam supply is achieved, and construction costs and thermal energy losses are reduced.

CN120368768APending Publication Date: 2025-07-25XIAN THERMAL POWER RES INST CO LTD +1
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Patent Information

Application Number
CN202510762249.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-09
Publication Date
2025-07-25

AI Technical Summary

Technical Problem

Due to the dispersion of heat users in the industrial park, the traditional centralized heating and steam supply model leads to high construction costs and serious losses during the heat transmission process, making it difficult to ensure the stable supply of heat sources for end users, affecting enterprise production.

Method used

A thermochemical energy storage device with centralized heat storage and dispersion and heat release is adopted, and a thermochemical mobile heat source vehicle is combined with a thermochemical mobile heat source vehicle through the new energy plant station, and the conversion of Ca(OH)2 and CaO materials in the energy storage and heat release reactor is provided to provide a reliable steam supply.

Benefits of technology

It realizes reliable steam supply for dispersed industrial users, reduces construction costs and heat energy losses, and improves system flexibility and operating efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a thermochemical energy storage device and method for centralized heat storage and dispersion heat release. An outlet of a second Ca (OH) 2 stock bin is communicated with a feeding port of an energy storage reactor, and a discharging port of the energy storage reactor is communicated with an inlet of a second CaO stock bin; a reactor is built on the thermochemical mobile heat source vehicle, an outlet of the feeding bin is communicated with an inlet of the reactor, an outlet of the reactor is communicated with an inlet of the discharging bin, an outlet of the first water tank is communicated with a water inlet of the reactor, and a steam outlet of the reactor is communicated with the first steam pocket; an outlet of the second water tank is communicated with a water inlet of the heat release reactor, a steam outlet of the heat release reactor is communicated with an inlet of the second steam pocket, an outlet of the first CaO stock bin is communicated with a feeding port of the heat release reactor, and a discharging port of the heat release reactor is communicated with an inlet of the first Ca (OH) 2 stock bin; the device and the method can provide reliable steam for dispersed industrial users.
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Description

Technical Field

[0001] The invention belongs to the technical field of thermochemical energy storage, and relates to a thermochemical energy storage device and method for centralized heat storage and decentralized heat release. Background Art

[0002] In the actual operation and development process of industrial parks, prominent problems in heat supply and steam supply are faced. The heat users in the park are widely distributed and relatively far apart from each other. This objective geographical condition severely restricts the effective construction and stable operation of the centralized heat supply and steam supply system. Due to the overly dispersed heat users, if the traditional centralized heat supply and steam supply mode is adopted, a large number of long heating pipe networks need to be laid, which will not only lead to a sharp increase in construction costs, but also, during the heat energy transmission process, due to factors such as pipeline heat dissipation and heat loss, the heat energy decays severely, making it difficult to ensure that the end heat users can obtain a stable and sufficient heat source supply, unable to effectively meet the actual production and domestic heat use requirements of various enterprises in the park, unable to provide reliable heat energy guarantee for the reliable production operations in the park, and seriously affecting the normal production order and economic benefits of the enterprises in the park. Summary of the Invention

[0003] The purpose of the invention is to overcome the above-mentioned shortcomings of the prior art and provide a thermochemical energy storage device and method for centralized heat storage and decentralized heat release, which can provide reliable steam for decentralized industrial users.

[0004] To achieve the above purpose, the invention discloses a thermochemical energy storage device for centralized heat storage and decentralized heat release, including a new energy power station, a storage reactor, a second Ca(OH)₂ silo, a second CaO silo, a thermochemical mobile heat source vehicle, a second water tank, a heat release reactor, a first CaO silo, a first Ca(OH)₂ silo, a second steam drum, a first water tank and a first steam drum;

[0005] The output end of the new energy power station is connected to the power supply interface of the storage reactor, the outlet of the second Ca(OH)₂ silo is communicated with the inlet of the storage reactor, and the outlet of the storage reactor is communicated with the inlet of the second CaO silo;

[0006] A reactor is built on the thermochemical mobile heat source vehicle, the outlet of the first water tank is communicated with the inlet of the reactor, and the steam outlet of the reactor is connected to the first steam drum;

[0007] The outlet of the second water tank is communicated with the inlet of the heat release reactor, the steam outlet of the heat release reactor is connected to the inlet of the second steam drum, the outlet of the first CaO silo is communicated with the inlet of the heat release reactor, and the outlet of the heat release reactor is communicated with the inlet of the first Ca(OH)₂ silo.

[0008] The further improvement of the thermochemical energy storage system for centralized heat storage and decentralized heat release of the invention lies in:

[0009] Further, the outlet of the first water tank is connected to the inlet of the reactor through a water pump.

[0010] Further, the outlet of the second water tank is connected to the inlet of the exothermic reactor through a pump.

[0011] Further, in the energy storage area, the materials in the reactor are discharged into the second Ca(OH)₂ silo, and then the materials in the second CaO silo are discharged into the reactor.

[0012] Further, in the small-scale steam supply area, the first steam drum is connected to the decentralized industrial users.

[0013] Further, in the large-scale steam supply area, the materials in the reactor are discharged into the first CaO silo, and then the materials in the first Ca(OH)₂ silo are discharged into the reactor.

[0014] Further, the outlet of the first water tank is connected to the inlet of the reactor through a first valve, and the steam outlet of the reactor is connected to the first steam drum through a second valve.

[0015] Further, it further includes a controller, wherein the controller is connected to the first valve, the second valve, the pump, the water pump and the thermochemical mobile heat source vehicle.

[0016] The present invention discloses a thermochemical energy storage method for centralized heat storage and decentralized heat release, including an energy storage condition, a small-scale steam supply condition and a large-scale heat supply condition.

[0017] The further improvement of the thermochemical energy storage method for centralized heat storage and decentralized heat release according to the present invention lies in:

[0018] Further, in the energy storage area, when the thermochemical mobile heat source vehicle reaches the energy storage area, all the materials in the reactor are discharged into the second Ca(OH)₂ silo, and then the materials in the second CaO silo are discharged into the reactor for concentration;

[0019] In the large-scale steam supply area, when the thermochemical mobile heat source vehicle reaches the large-scale steam supply area, all the materials in the reactor are discharged into the first CaO silo, and the materials in the first Ca(OH)₂ silo are loaded into the reactor;

[0020] Under the energy storage condition, the Ca(OH)₂ material in the second Ca(OH)₂ silo enters the energy storage reactor to store electrical energy, and then falls into the second CaO silo for storage;

[0021] Under the small-scale steam supply condition, the thermochemical mobile heat source vehicle is moved to the small-scale steam supply area. The water output from the first water tank enters the reactor to absorb heat and become steam, and then enters the first steam drum, and steam is supplied to the decentralized industrial users through the first steam drum. Among them, the first steam drum plays a role in stabilizing the pressure;

[0022] Under large-scale heating conditions, the CaO material output from the first CaO silo is fed into the exothermic reactor, and the Ca(OH)2 material output from the exothermic reactor is fed into the first Ca(OH)2 silo. At the same time, the steam in the second steam drum is fed into the exothermic reactor, and the calcium oxide-based material and water vapor undergo a thermochemical reaction to release heat violently. The water output from the second water tank is fed into the exothermic reactor to convert the thermochemical heat release into hot steam. The hot steam first enters the second steam drum and then steam is supplied from the second steam drum to distributed industrial users.

[0023] The present invention has the following beneficial effects:

[0024] When the thermochemical energy storage device and method for centralized heat storage and decentralized heat release according to the present invention are specifically operated, the thermochemical mobile heat source vehicle is moved to the new energy plant. The Ca(OH)2 material is converted into CaO material by using electric energy through the energy storage reactor. When heat supply is required, the CaO material is transported to the distributed industrial area by the thermochemical mobile heat source vehicle, and the CaO material is converted into Ca(OH)2 material through the reactor or the exothermic reactor to release heat. The released heat is used to heat the feed water to form steam to supply distributed industrial users, with strong reliability and relatively simple structure. Description of the Drawings

[0025] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 is the structural diagram of the present invention.

[0027] Among them, 1 is the new energy plant, 2 is the first CaO silo, 3 is the first Ca(OH)2 silo, 4 is the distributed industrial user, 5 is the exothermic reactor, 6 is the second Ca(OH)2 silo, 7 is the second CaO silo, 8 is the energy storage reactor, 9 is the heat recovery storage tank, 10 is the thermochemical mobile heat source vehicle, 11 is the first water tank, 12 is the water pump, 13 is the first steam drum, 14 is the second water tank, and 15 is the second steam drum. Detailed Embodiments

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0030] It should also be understood that the terms used in the specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0031] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. For example, A and / or B can represent: the case of A alone, the case of both A and B present, and the case of B alone. Additionally, in the present invention, the character " / " generally represents an "or" relationship between the contextually related objects.

[0032] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present invention to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0033] Depending on the context, the word "if" as used herein can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0035] Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are merely exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0036] As is well known, a thermal chemical reactor is a core device used to achieve thermal chemical reaction processes in fields such as chemical engineering, energy, and environmental protection. It promotes the reaction towards the target product by precisely controlling parameters such as temperature, pressure, and reactant concentration. The following is a systematic analysis from aspects such as classification, structural characteristics, application scenarios, technical challenges, and development trends:

[0037] Classification of thermal chemical reactors. According to reaction conditions and process requirements, thermal chemical reactors can be classified into the following categories:

[0038] Characteristics of a fixed-bed reactor: The catalyst is fixed in the reactor, and the reactants pass through the catalyst bed in a gas or liquid phase. Application: Suitable for gas-solid phase catalytic reactions such as ammonia synthesis and methanol synthesis. Advantages: Long catalyst life and high reaction efficiency; however, the catalyst needs to be regenerated or replaced regularly. Characteristics of a fluidized-bed reactor: Solid catalyst particles are in a fluidized state under the action of gas or liquid flow, similar to boiling liquid. Application: Suitable for gas-solid or liquid-solid phase reactions such as petroleum catalytic cracking and coal gasification. Advantages: High heat and mass transfer efficiency and sufficient catalyst contact; however, the system is complex and the operation difficulty is relatively large.

[0039] Characteristics of a moving-bed reactor: The catalyst particles slowly move in the reactor to achieve continuous reaction and regeneration. Application: Suitable for reactions where the catalyst is easily deactivated, such as Fischer-Tropsch synthesis and vinyl chloride synthesis. Advantages: High catalyst utilization rate and strong reaction continuity; however, the equipment investment is relatively large.

[0040] Characteristics of tubular reactor: Reactants flow inside the tube, and temperature control is achieved by heating or cooling through the tube wall. Applications: Suitable for gas-phase or liquid-phase reactions, such as the oxidation of ethylene to ethylene oxide, petroleum cracking, etc. Advantages: Simple structure, precise temperature control; but problems such as pressure drop and heat transfer inside the tube need to be addressed. Characteristics of stirred-tank reactor: Reactants are mixed and reacted in a stirred tank, suitable for batch or continuous operation. Applications: Suitable for liquid-phase reactions, such as esterification, polymerization, etc. Advantages: Flexible operation, suitable for multi-variety and small-batch production; but the heat transfer efficiency is relatively low.

[0041] Thermochemical reactors are core equipment indispensable in modern industry, and their design and application are directly related to reaction efficiency, product quality, and economic benefits. In the future, with the development of materials science, catalysis technology, and automation control, thermochemical reactors will continue to evolve towards high efficiency, energy conservation, and environmental protection, providing stronger technical support for the chemical, energy, and environmental protection fields.

[0042] Example 1

[0043] Reference Figure 1 The thermochemical energy storage device with centralized heat storage and decentralized heat release according to the present invention includes a new energy plant 1, a storage reactor 8, a second Ca(OH)₂ silo 6, a second CaO silo 7, a thermochemical mobile heat source vehicle 10, a second water tank 14, a heat release reactor 5, a first CaO silo 2, a first Ca(OH)₂ silo 3, a second steam drum 15, a first water tank 11, and a first steam drum 13; the output end of the new energy plant 1 is connected to the power interface of the storage reactor 8, the outlet of the second Ca(OH)₂ silo 6 is communicated with the inlet of the storage reactor 8, and the outlet of the storage reactor 8 is communicated with the inlet of the second CaO silo 7; a reactor is built on the thermochemical mobile heat source vehicle 10, the outlet of the first water tank 11 is communicated with the inlet of the reactor, and the steam outlet of the reactor is connected to the first steam drum 13; the outlet of the second water tank 14 is communicated with the inlet of the heat release reactor 5, the steam outlet of the heat release reactor 5 is connected to the inlet of the second steam drum 15, the outlet of the first CaO silo 2 is communicated with the inlet of the heat release reactor 5, and the outlet of the heat release reactor 5 is communicated with the inlet of the first Ca(OH)₂ silo 3.

[0044] Example 2

[0045] To further improve this application, reference Figure 1, the thermochemical energy storage device with centralized heat storage and decentralized heat release of the present invention includes a new energy plant 1, a first CaO silo 2, a first Ca(OH)₂ silo 3, decentralized industrial users 4, a heat release reactor 5, a second Ca(OH)₂ silo 6, a second CaO silo 7, an energy storage reactor 8, a heat recovery storage tank 9, a thermochemical mobile heat source vehicle 10, a first water tank 11, a water pump 12, a first steam drum 13, a second water tank 14 and a second steam drum 15; the second water tank 14, the heat release reactor 5, the second steam drum 15, the second CaO silo 7 and the second Ca(OH)₂ silo 6 are located in the large-scale steam supply area, and the first water tank 11 and the first steam drum 13 are located in the small-scale steam supply area;

[0046] The output end of the new energy plant 1 is connected to the power supply interface of the energy storage reactor 8, the outlet of the second Ca(OH)₂ silo 6 is communicated with the inlet of the energy storage reactor 8, and the outlet of the energy storage reactor 8 is communicated with the inlet of the second CaO silo 7.

[0047] A reactor is built on the thermochemical mobile heat source vehicle 10. In the small-scale steam supply area, the outlet of the first water tank 11 is connected to the inlet of the reactor through the water pump 12, and the steam outlet of the reactor is connected to the first steam drum 13.

[0048] The outlet of the second water tank 14 is connected to the inlet of the heat release reactor 5 through a pump, the steam outlet of the heat release reactor 5 is connected to the inlet of the second steam drum 15, the outlet of the first CaO silo 2 is connected to the inlet of the heat release reactor 5, and the outlet of the heat release reactor 5 is connected to the inlet of the first Ca(OH)₂ silo 3.

[0049] In this embodiment, the outlet of the first water tank 11 is connected to the inlet of the reactor through a first valve, and the steam outlet of the reactor is connected to the first steam drum 13 through a second valve.

[0050] In this embodiment, it further includes a controller. The controller is connected to the first valve, the second valve, the pump, the water pump 12 and the thermochemical mobile heat source vehicle 10, and controls the first valve, the second valve, the pump, the water pump 12 and the thermochemical mobile heat source vehicle 10 through the controller.

[0051] Embodiment Three

[0052] This embodiment discloses a thermochemical energy storage method for centralized heat storage and decentralized heat release. The thermochemical energy storage method for centralized heat storage and decentralized heat release is implemented based on the thermochemical energy storage system for centralized heat storage and decentralized heat release. The thermochemical energy storage system for centralized heat storage and decentralized heat release includes a new energy plant 1, a first CaO silo 2, a first Ca(OH)₂ silo 3, decentralized industrial users 4, a heat release reactor 5, a second Ca(OH)₂ silo 6, a second CaO silo 7, an energy storage reactor 8, a heat recovery storage tank 9, a thermochemical mobile heat source vehicle 10, a first water tank 11, a water pump 12, a first steam drum 13, a second water tank 14, and a second steam drum 15; the second water tank 14, the heat release reactor 5, the second steam drum 15, the second CaO silo 7, and the second Ca(OH)₂ silo 6 are located in the large-scale steam supply area, and the first water tank 11 and the first steam drum 13 are located in the small-scale steam supply area; the specific connection relationship is as shown in Embodiment 2.

[0053] Specifically, the thermochemical energy storage method for centralized heat storage and decentralized heat release includes the following steps:

[0054] In the energy storage area, when the thermochemical mobile heat source vehicle 10 reaches the energy storage area, all the materials in the reactor are discharged into the second Ca(OH)₂ silo 6, and then the materials in the second CaO silo 7 are discharged into the reactor for concentration.

[0055] In the large-scale steam supply area, when the thermochemical mobile heat source vehicle 10 reaches the large-scale steam supply area, all the materials in the reactor are discharged into the first CaO silo 2, and the materials in the first Ca(OH)₂ silo 3 are loaded into the reactor.

[0056] Energy storage process: Using new energy abandoned electricity or the peak shaving power of a thermal power unit to convert electrical energy into the chemical energy of materials. In this process, calcium hydroxide-based thermochemical materials are converted into calcium oxide-based materials, and the decomposed steam is stored in the heat recovery storage tank 9. The Ca(OH)₂ material in the second Ca(OH)₂ silo 6 enters the energy storage reactor 8 to store electrical energy and then falls into the second CaO silo 7 for storage.

[0057] Energy release process:

[0058] For the small-scale steam supply area with a small gas consumption, move the thermochemical mobile heat source vehicle 10 to the small-scale steam supply area, then open the first valve and the second valve. The water output from the first water tank 11 enters the reactor to absorb heat and become steam, and then enters the first steam drum 13. The first steam drum 13 supplies steam to the decentralized industrial users 4 in the small-scale steam supply area. Among them, the first steam drum 13 plays a role in stabilizing the pressure.

[0059] For a large-scale steam supply area with a large gas consumption, the CaO material output from the first CaO silo 2 is sent into the exothermic reactor 5, and the Ca(OH)2 material output from the exothermic reactor 5 is sent into the first Ca(OH)2 silo 3. At the same time, the steam in the second steam drum 15 is introduced into the exothermic reactor 5. The calcium oxide-based material and water vapor undergo a thermochemical reaction and release heat violently. The water output from the second water tank 14 is pumped into the exothermic reactor 5 to convert the thermochemical heat release into hot steam. The hot steam first enters the second steam drum 15, and then steam is supplied from the second steam drum 15 to the decentralized industrial users 4 in the large-scale steam supply area. The second steam drum 15 plays a role in stabilizing the pressure.

[0060] The high-parameter steam is stored in the heat recovery storage tank 9 and sent to the steam drum of the decentralized users through a special steam storage tank transport vehicle to achieve steam supplementation and energy supplementation for the steam drum on the user side.

[0061] It should be noted that the present invention effectively solves the problem that the decentralized industrial users 4 cannot achieve centralized heat pipe network heating and steam supply, can absorb new energy abandoned electricity or assist thermal power units in peak shaving. At the same time, by setting up the Ca(OH)2 silo and CaO silo, the decoupling of the energy storage process and the energy release process is realized, which can be carried out separately, the system has higher flexibility, high system operation efficiency, low investment cost, good flexibility of decentralized heat release, and can match the heat consumption duration requirements of heat users.

[0062] After considering the specification and the disclosure of the invention, those skilled in the art will easily think of other embodiments of the present invention. This application aims to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include the common general knowledge or conventional technical means in the technical field not disclosed in the present invention. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0063] It should be understood that the present invention is not limited to the precise structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

[0064] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A thermochemical energy storage device with centralized heat storage and decentralized heat release, characterized in that, It includes a new energy plant (1), an energy storage reactor (8), a second Ca(OH)₂ silo (6), a second CaO silo (7), a thermochemical mobile heat source vehicle (10), a second water tank (14), a heat release reactor (5), a first CaO silo (2), a first Ca(OH)₂ silo (3), a second steam drum (15), a first water tank (11) and a first steam drum (13); The output end of the new energy plant (1) is connected to the power interface of the energy storage reactor (8), the outlet of the second Ca(OH)₂ silo (6) is communicated with the inlet of the energy storage reactor (8), and the outlet of the energy storage reactor (8) is communicated with the inlet of the second CaO silo (7); A reactor is built on the thermochemical mobile heat source vehicle (10), the outlet of the first water tank (11) is communicated with the inlet of the reactor, and the steam outlet of the reactor is connected to the first steam drum (13); The outlet of the second water tank (14) is communicated with the inlet of the heat release reactor (5), the steam outlet of the heat release reactor (5) is connected to the inlet of the second steam drum (15), the outlet of the first CaO silo (2) is communicated with the inlet of the heat release reactor (5), and the outlet of the heat release reactor (5) is communicated with the inlet of the first Ca(OH)₂ silo (3).

2. The thermochemical energy storage device for centralized heat storage and decentralized heat release according to claim 1, characterized in that, The outlet of the first water tank (11) is connected to the inlet of the reactor through a water pump (12).

3. The thermochemical energy storage device for centralized heat storage and decentralized heat release according to claim 1, characterized in that, The outlet of the second water tank (14) is connected to the inlet of the heat release reactor (5) through a pump.

4. The thermochemical energy storage device for centralized heat storage and decentralized heat release according to claim 1, characterized in that In the energy storage area, the materials in the reactor are discharged into the second Ca(OH)₂ silo (6), and then the materials in the second CaO silo (7) are discharged into the reactor.

5. The thermochemical energy storage device for centralized heat storage and decentralized heat release according to claim 1, wherein In the small-scale steam supply area, the first steam drum (13) is connected to the dispersed industrial users (4).

6. The thermochemical energy storage device for centralized heat storage and decentralized heat release according to claim 1, wherein In the large-scale steam supply area, the materials in the reactor are discharged into the first CaO silo (2), and then the materials in the first Ca(OH)₂ silo (3) are loaded into the reactor.

7. The thermochemical energy storage device for centralized heat storage and decentralized heat release according to claim 5, characterized in that, The outlet of the first water tank (11) is connected to the inlet of the reactor through a first valve, and the steam outlet of the reactor is connected to the first steam drum (13) through a second valve.

8. The thermochemical energy storage device for centralized heat storage and decentralized heat release according to claim 7, characterized in that, It also includes a controller, wherein the controller is connected to the first valve, the second valve, the pump, the water pump (12) and the thermochemical mobile heat source vehicle (10).

9. A thermochemical energy storage method with centralized heat storage and decentralized heat release, characterized in that, It includes an energy storage working condition, a small-scale steam supply working condition and a large-scale heat supply working condition.

10. The thermochemical energy storage method for centralized heat storage and decentralized heat release according to claim 9, characterized in that, In the energy storage area, when the thermochemical mobile heat source vehicle (10) reaches the energy storage area, all the materials in the reactor are discharged into the second Ca(OH)₂ silo (6), and then the materials in the second CaO silo (7) are discharged into the reactor for concentration; In the large-scale steam supply area, when the thermochemical mobile heat source vehicle (10) reaches the large-scale steam supply area, all the materials in the reactor are discharged into the first CaO silo (2), and the materials in the first Ca(OH)₂ silo (3) are loaded into the reactor; Under the energy storage working condition, the Ca(OH)₂ material in the second Ca(OH)₂ silo (6) enters the energy storage reactor (8) to store electric energy, and then falls into the second CaO silo (7) for storage; Under the small-scale steam supply condition, the thermochemical mobile heat source vehicle (10) is moved to the small-scale steam supply area. The water output from the first water tank (11) enters the reactor, absorbs heat and becomes steam, and then enters the first steam drum (13). The first steam drum (13) supplies steam to the decentralized industrial users (4), where the first steam drum (13) plays a role in stabilizing the pressure. Under the large-scale heat supply condition, the CaO material output from the first CaO bin (2) is sent into the exothermic reactor (5). The Ca(OH)2 material output from the exothermic reactor (5) is sent into the first Ca(OH)2 bin (3). At the same time, the steam in the second steam drum (15) is introduced into the exothermic reactor (5). The calcium oxide-based material and water vapor undergo a thermochemical reaction and release heat violently. The water output from the second water tank (14) is introduced into the exothermic reactor (5) to convert the thermochemical heat release into hot steam. The hot steam first enters the second steam drum (15), and then steam is supplied from the second steam drum (15) to the decentralized industrial users (4).