Flexible heat and steam supply control system and method for thermochemical energy storage system

Abstract

The invention discloses a flexible heat and steam supply control system and method for a thermochemical energy storage system, each thermochemical reactor comprises a shell, a plurality of reaction cavities are arranged in the shell, and a heat exchange steam pipe bundle, an electric heating rod and a steam channel device are arranged in each reaction cavity; the heat exchange steam pipe bundles in all the reaction cavities in the same thermochemical reactor are sequentially communicated in series to form a heat exchange steam pipe, and the heat exchange steam pipes in all the thermochemical reactors are sequentially communicated in series to form a heat exchange pipe; the first water feeding pump and the first steam or hot water pipeline are communicated with one end of the heat exchange pipe, and the other end of the heat exchange pipe is communicated with the second water feeding pump and the second steam or hot water pipeline; and an outlet of the steam pocket communicates with inlets of the steam channel devices. According to the system and the method, heat supply and steam supply of thermochemical energy storage can be flexibly controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating, and relates to a flexible heating and steam supply control system and method for a thermochemical energy storage system. Background Art

[0002] As a promising energy storage and conversion technology, thermochemical energy storage devices have shown broad application prospects in the field of comprehensive energy utilization. However, their inherent complex reaction mechanisms and multi-parameter dynamic characteristics during operation have brought huge challenges to the precise control of the heating and steam supply process, seriously restricting their ability to achieve stable heating and steam supply parameters and optimize system operation efficiency.

[0003] From the perspective of reaction mechanism, thermochemical energy storage devices involve a series of complex and interrelated chemical reactions. These reactions are not simple linear processes, but are affected by a combination of factors, showing highly nonlinear and time-varying characteristics. For example, the chemical reaction rate between reactants will change significantly with changes in conditions such as temperature, pressure, and concentration. There may also be complex interactions such as competition and synergy between different reaction steps. This complex reaction network makes it extremely difficult to accurately predict and control the reaction process. It is difficult to ensure that the reaction always proceeds according to the predetermined path and rate during the heat and steam supply process, which leads to fluctuations in the output heat energy and steam parameters.

[0004] In terms of temperature parameters, the temperature of the thermochemical energy storage device will change frequently and drastically during operation. During the energy storage stage, the device needs to absorb a large amount of heat to allow the reactants to reach a specific reaction temperature, and the temperature will rise rapidly; and during the energy release, heat and steam supply stage, the temperature will drop sharply as the heat is released. Moreover, due to differences in heat conduction and reaction processes at different locations within the device, the temperature field distribution will be uneven, resulting in local overheating or overcooling. This instability and unevenness of temperature parameters will not only affect the efficiency and selectivity of the chemical reaction, but may also cause thermal stress damage to the material and structure of the device, reducing the reliability and service life of the device, and making it extremely difficult to maintain stable heat and steam supply temperature parameters.

[0005] In addition, the energy input and output process of the thermochemical energy storage device also presents dynamic characteristics. The rate and total amount of energy input will be affected by the fluctuation of external energy supply (such as solar energy, industrial waste heat, etc.) and the limitation of the device's own energy storage capacity, while the energy output needs to be adjusted in real time according to the user's thermal load demand. However, since the user's thermal load demand is often uncertain and intermittent, and there are certain delays and lag effects in the energy conversion and transfer process of the device, it is difficult to achieve an accurate match between energy input and output. This dynamic imbalance will cause the device to frequently be in a non-steady-state condition during operation, further exacerbating the instability of the heating and steam supply parameters. At the same time, it is difficult to ensure that the system always operates in the most efficient state, resulting in energy waste and increased operating costs.

[0006] In summary, due to the combined influence of multiple characteristics such as complex reactions, changes in temperature parameters, and dynamic changes in energy input and output, thermochemical energy storage devices face the dilemma of difficult precise control during the heating and steam supply process. It is difficult to achieve stable heating and steam supply parameters and optimize the system operating efficiency. This has become one of the key bottlenecks restricting its large-scale commercial application. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a flexible heat and steam supply control system and method for a thermochemical energy storage system, which can flexibly control the heat and steam supply of the thermochemical energy storage.

[0008] The present invention discloses a flexible heat and steam supply control system for a thermochemical energy storage system, comprising a first feedwater pump, a first steam or hot water pipeline, a second feedwater pump, a second steam or hot water pipeline, a steam drum and several thermochemical reactors;

[0009] Each thermochemical reactor comprises a shell, wherein a plurality of reaction chambers are arranged inside the shell, and each reaction chamber is provided with a heat exchange steam tube bundle, an electric heating rod and a steam channel device;

[0010] The heat exchange steam tube bundles in each reaction chamber in the same thermochemical reactor are connected in series in sequence to form a heat exchange steam pipe, and the heat exchange steam pipes in each thermochemical reactor are connected in series in sequence to form a heat exchange pipe; the first water feed pump and the first steam or hot water pipeline are connected to one end of the heat exchange pipe, and the other end of the heat exchange pipe is connected to the second water feed pump and the second steam or hot water pipeline; the outlet of the steam drum is connected to the inlet of each steam channel device.

[0011] The further improvement of the flexible heat and steam supply control system of the thermochemical energy storage system of the present invention is:

[0012] Furthermore, the electric heating rod is provided with electric heating rod heat exchange fins.

[0013] Furthermore, the heat exchange steam tube bundle is provided with heat exchange steam tube bundle heat exchange fins.

[0014] Furthermore, a steam outlet is provided at the top of each reaction chamber.

[0015] Furthermore, the steam outlet is communicated with the inlet of the heat exchanger in the steam drum.

[0016] Furthermore, it also includes a condensate pipeline, and the outlet of the heat exchanger is connected to the condensate pipeline.

[0017] Furthermore, the number of the thermochemical reactors is three.

[0018] Furthermore, a regulating valve is provided between the outlet of the steam drum and the steam channel device.

[0019] The present invention discloses a method for controlling flexible heat and steam supply of a thermochemical energy storage system, comprising the following steps:

[0020] During the heat storage process, the number of startups of the thermochemical reactor is determined according to the heat storage power, and the operation of the electric heating rods in the chemical reactor is controlled according to the determined number of startups, so as to convert the electrical energy into thermal energy and then into chemical energy for the thermochemical reaction;

[0021] During the heat release process, when the supply parameters are low-parameter steam or hot water, the steam pressure entering each thermochemical reactor is adjusted to 0.01~0.1MPa. In the initial state, the first water supply pump is running, and the cooling water passes through the third thermochemical reactor, the second thermochemical reactor and the first thermochemical reactor in turn, so as to achieve a continuous supply of low-parameter steam and hot water. After running for a period of time, the second water supply pump is switched to run, and the cooling water passes through the first thermochemical reactor, the second thermochemical reactor and the third thermochemical reactor in turn, and finally achieves a stable heat release output of the three thermochemical reactors; when supplying high-parameter steam, the first thermochemical reactor, the second thermochemical reactor and the third thermochemical reactor are adjusted respectively. The reaction steam pressure is 0.2~0.3MPa, 0.1~0.2MPa, and 0.01~0.1MPa. The water from the first water feed pump passes through the third thermochemical reactor, the second thermochemical reactor and the heat exchange steam tube bundle of the first thermochemical reactor in turn. After running for a period of time, the reaction steam pressure of the first thermochemical reactor, the second thermochemical reactor 5 and the third thermochemical reactor is switched to 0.01~0.1MPa, 0.1~0.2MPa, and 0.2~0.3MPa respectively. The first water feed pump is turned off and the second water feed pump is turned on. The water passes through the first thermochemical reactor, the second thermochemical reactor, and the third thermochemical reactor in turn to achieve stable output of high-parameter steam.

[0022] Furthermore, when the heat storage power is between 0-33%, the electric heating rod in one thermochemical reactor is started; when the heat storage power is between 33% and 66%, the electric heating rods in two thermochemical reactors are started; and when the heat storage power is between 66% and 100%, the electric heating rods in three thermochemical reactors are started.

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

[0024] The flexible heat and steam supply control system and method for the thermochemical energy storage system described in the present invention, during specific operation, determines the start-up number of the thermochemical reactor according to the heat storage power during the heat storage process, and controls the operation of the electric heating rods in the chemical reactor according to the determined start-up number, converting electrical energy into thermal energy and then into chemical energy for the thermochemical reaction to meet the actual heat storage power. The system has strong flexibility. In addition, the outlet of the steam drum is connected to the inlet of each steam channel device, and the steam entering each steam channel device is independently controlled, thereby flexibly controlling the heat and steam supply of the thermochemical energy storage, and is extremely practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural diagram of the present invention;

[0027] Figure 2 is a side view of the thermochemical reactor 5;

[0028] Figure 3 FIG. 5 is a top view of the thermochemical reactor 5 .

[0029] Among them, 1 is the first steam or hot water pipe, 2 is the second steam or hot water pipe, 3 is the first feed water pump, 4 is the second feed water pump, 5 is the thermochemical reactor, 6 is the steam drum, 7 is the condensate pipe, 8 is the heat exchanger, 9 is the heat exchange tube, 10 is the reaction chamber, 11 is the electric heating rod, 12 is the steam channel device, 13 is the heat exchange steam tube bundle, 14 is the electric heating rod heat exchange fin, and 15 is the heat exchange steam tube bundle heat exchange fin. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it is to be understood that the terms “include” and “comprise” 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 collections thereof.

[0032] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should be further understood that the term "and / or" as used in the present specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0034] It should be understood that although the terms "first," "second," and "third" may be used to describe preset ranges in embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are merely used to distinguish one preset range from another. For example, without departing from the scope of 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.

[0035] The word "if," as used herein, may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0036] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0038] Example 1

[0039] refer to Figure 1 、 Figure 2 and Figure 3 The flexible heating and steam supply control system of the thermochemical energy storage system of the present invention includes a first water supply pump 3, a first steam or hot water pipeline 1, a second water supply pump 4, a second steam or hot water pipeline 2, a steam drum 6 and several thermochemical reactors 5; each thermochemical reactor 5 includes a shell, and several reaction chambers 10 are arranged inside the shell, and each reaction chamber 10 is provided with a heat exchange steam tube bundle 13, an electric heating rod 11 and a steam channel device 12; the heat exchange steam tube bundle 13 in each reaction chamber 10 in the same thermochemical reactor 5 is connected in series in sequence to form a heat exchange steam pipe, and the heat exchange steam pipes in each thermochemical reactor 5 are connected in series in sequence to form a heat exchange pipe 9; the first water supply pump 3 and the first steam or hot water pipeline 1 are connected to one end of the heat exchange pipe 9, and the other end of the heat exchange pipe 9 is connected to the second water supply pump 4 and the second steam or hot water pipeline 2; the outlet of the steam drum 6 is connected to the inlet of each steam channel device 12.

[0040] Example 2

[0041] refer to Figure 1 、 Figure 2 and Figure 3, in order to further improve this application, the flexible heat and steam supply control system of the thermochemical energy storage system of the present invention includes a first feedwater pump 3, a first steam or hot water pipeline 1, a second feedwater pump 4, a second steam or hot water pipeline 2, a steam drum 6 and a plurality of thermochemical reactors 5;

[0042] Each thermochemical reactor 5 includes a shell, and a plurality of reaction chambers 10 are arranged inside the shell. Each reaction chamber 10 is provided with a heat exchange steam tube bundle 13, an electric heating rod 11 and a steam channel device 12. The bottom of each reaction chamber 10 is provided with a branch discharge port, and the top of each reaction chamber 10 is provided with a branch feed port. The top of the shell is provided with a total feed port, and the bottom of the shell is provided with a total discharge port. The total feed port and each branch feed port are connected through a material distributor, and each branch discharge port is connected to the total discharge port through a material collector.

[0043] The electric heating rod 11 is provided with an electric heating rod heat exchange fin 14, and the heat exchange steam tube bundle 13 is provided with a heat exchange steam tube bundle heat exchange fin 15. The steam channel device 12 includes a top cover and two grid plates, wherein the upper ends of the two grid plates are fixed to the top cover, the lower ends of the two grid plates are fixed to the bottom of the reaction chamber 10, and the front and rear ends of the two grid plates are fixed to the inner wall of the reaction chamber 10;

[0044] The heat exchange steam tube bundles 13 in each reaction chamber 10 in the same thermochemical reactor 5 are sequentially connected in series to form a heat exchange steam pipe. The heat exchange steam pipes in each thermochemical reactor 5 are sequentially connected in series to form a heat exchange pipe 9.

[0045] The first water supply pump 3 and the first steam or hot water pipe 1 are connected to one end of the heat exchange pipe 9 , and the other end of the heat exchange pipe 9 is connected to the second water supply pump 4 and the second steam or hot water pipe 2 .

[0046] The outlet of the steam drum 6 is connected to the inlet of each steam channel device 12, and a steam outlet is provided at the top of each reaction chamber 10. The steam outlet is connected to the inlet of the heat exchanger 8 in the steam drum 6, and the outlet of the heat exchanger 8 is connected to the condensate pipe 7.

[0047] Preferably, in this embodiment, the number of the thermochemical reactors 5 is three.

[0048] In this embodiment, a regulating valve is provided between the outlet of the steam drum 6 and the steam channel device 12 .

[0049] The control process of the present invention is:

[0050] When the heat storage power is between 0% and 33%, the electric heating rod 11 in one thermochemical reactor 5 is started; when the heat storage power is between 33% and 66%, the electric heating rods 11 in two thermochemical reactors 5 are started; when the heat storage power is between 66% and 100%, the electric heating rods 11 in three thermochemical reactors 5 are started. A plurality of reaction chambers 10 are arranged inside each thermochemical reactor 5, and the electric heating rod 11 in each reaction chamber 10 is independently controlled and finely controlled. Based on the heat storage power, coordinated control of a single reaction chamber 10 to multiple thermochemical reactors 5 is realized to meet the requirements of the heat storage power. During the heat storage process, electrical energy is converted into thermal energy and then into chemical energy of the thermochemical reaction. All the generated steam is passed into the heat exchanger 8 in the steam drum 6 to realize heat recovery and utilization in the heat storage process.

[0051] The heat release process is controlled by controlling the steam pressure of the steam output from the drum 6 entering the thermochemical reactor 5, so as to achieve controllable and adjustable thermochemical reaction. When the supply parameter is low-parameter steam or hot water, the steam pressure entering the thermochemical reactor 5 is adjusted to 0.01-0.1 MPa. In the initial state, the first water supply pump 3 is running, and the cooling water passes through the third thermochemical reactor 5, the second thermochemical reactor 5 and the first thermochemical reactor 5 in sequence, so as to achieve a continuous supply of low-parameter steam and hot water. After running for a period of time, the second water supply pump 4 is switched to run, and the cooling water passes through the first thermochemical reactor 5, the second thermochemical reactor 5 and the third thermochemical reactor 5 in sequence, so as to finally achieve stable heat release output from the three thermochemical reactors 5. When high-parameter steam is supplied, the reaction steam pressure of the first thermochemical reactor 5, the second thermochemical reactor 5 and the third thermochemical reactor 5 is adjusted to 0. 2~0.3MPa, 0.1~0.2MPa, 0.01~0.1MPa, the feed water of the first feed water pump 3 passes through the third thermochemical reactor 5, the second thermochemical reactor 5 and the heat exchange steam tube bundle 13 of the first thermochemical reactor 5 in sequence, the third thermochemical reactor 5 is used as a feed water preheating reactor, the second thermochemical reactor 5 is used as a feed water evaporation reactor, and the first thermochemical reactor 5 is used as a feed water superheating reactor. After running for a period of time, the reaction steam pressures of the first thermochemical reactor 5, the second thermochemical reactor 5 and the third thermochemical reactor 5 are switched to 0.01~0.1MPa, 0.1~0.2MPa, 0.2~0.3MPa respectively, the first feed water pump 3 is turned off, and the second feed water pump 4 is turned on. The feed water passes through the first thermochemical reactor 5, the second thermochemical reactor 5 and the third thermochemical reactor 5 in sequence to achieve stable output of high-parameter steam.

[0052] During the heat storage process, the interior of the thermochemical reactor 5 is divided into multiple reaction chambers 10, which can realize the zone control of the heat storage power and the control of the thermochemical reactors 5, so that the heat storage power remains stable; during the heat release process, the heat of different thermochemical reactions is released through multiple thermochemical reactors 5. Multiple thermochemical reactors 5 assume different roles, realizing uniform distribution of heat release and high system efficiency.

[0053] Based on the different heat absorption characteristics of water in the heating, saturation and superheating stages during the heat and steam supply process, the present invention designs multiple thermochemical reactors 5. By adjusting the different reaction steam pressures of each thermochemical reactor 5 and adjusting the heat release of the thermochemical reaction, the heat exchange medium is gradually heated up to achieve maximum system operating efficiency.

[0054] The present invention adjusts the exothermic temperature and heat release of the thermochemical reaction according to the heat absorption of water at different stages, thereby achieving stable heat and steam supply and the highest system operation efficiency.

[0055] Those skilled in the art will readily identify other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0056] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A flexible heat and steam supply control system for a thermochemical energy storage system, characterized in that: It comprises a first water supply pump (3), a first steam or hot water pipeline (1), a second water supply pump (4), a second steam or hot water pipeline (2), a steam drum (6) and a plurality of thermochemical reactors (5); Each thermochemical reactor (5) comprises a shell, wherein a plurality of reaction chambers (10) are provided inside the shell, and each reaction chamber (10) is provided with a heat exchange steam tube bundle (13), an electric heating rod (11) and a steam channel device (12); The heat exchange steam tube bundles (13) in each reaction chamber (10) in the same thermochemical reactor (5) are sequentially connected in series to form a heat exchange steam tube, and the heat exchange steam tubes in each thermochemical reactor (5) are sequentially connected in series to form a heat exchange tube (9); the first feed water pump (3) and the first steam or hot water pipeline (1) are connected to one end of the heat exchange tube (9), and the other end of the heat exchange tube (9) is connected to the second feed water pump (4) and the second steam or hot water pipeline (2); the outlet of the steam drum (6) is connected to the inlet of each steam channel device (12).

2. The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 is characterized in that: The electric heating rod (11) is provided with electric heating rod heat exchange fins (14).

3. The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 is characterized in that: The heat exchange steam tube bundle (13) is provided with heat exchange steam tube bundle heat exchange fins (15).

4. The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 is characterized in that: The top of each reaction chamber (10) is provided with a steam outlet.

5. The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 is characterized in that: The steam outlet is communicated with the inlet of the heat exchanger (8) in the steam drum (6).

6. The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 is characterized in that: It also includes a condensate water pipeline (7), and the outlet of the heat exchanger (8) is connected to the condensate water pipeline (7).

7. The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 is characterized in that: The number of thermochemical reactors (5) is three.

8. The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 is characterized in that: A regulating valve is provided between the outlet of the steam drum (6) and the steam channel device (12).

9. A method for controlling flexible heat and steam supply in a thermochemical energy storage system, characterized in that: The flexible heat and steam supply control system for the thermochemical energy storage system according to claim 1 comprises the following steps: During the heat storage process, the number of startups of the thermochemical reactor (5) is determined according to the heat storage power, and the operation of the electric heating rod (11) in the chemical reactor (5) is controlled according to the determined number of startups to convert electrical energy into thermal energy and then into chemical energy for the thermochemical reaction; During the heat release process, when the supply parameter is low-parameter steam or hot water, the steam pressure entering each thermochemical reactor (5) is adjusted to 0.01-0.1 MPa. In the initial state, the first water supply pump (3) is in operation, and the cooling water passes through the third thermochemical reactor (5), the second thermochemical reactor (5) and the first thermochemical reactor (5) in sequence, thereby achieving a continuous supply of low-parameter steam and hot water. After running for a period of time, the second water supply pump (4) is switched to operate, and the cooling water passes through the first thermochemical reactor (5), the second thermochemical reactor (5) and the third thermochemical reactor (5) in sequence, thereby finally achieving a stable heat release output of the three thermochemical reactors (5); when high-parameter steam is supplied, the first thermochemical reactor (5), the second thermochemical reactor (5) and the third thermochemical reactor (5) are adjusted respectively. The reaction steam pressure is 0.2-0.3 MPa, 0.1-0.2 MPa, and 0.01-0.1 MPa. The feed water of the first feed water pump (3) passes through the third thermochemical reactor (5), the second thermochemical reactor (5), and the heat exchange steam bundle (13) of the first thermochemical reactor (5) in sequence. After running for a period of time, the reaction steam pressure of the first thermochemical reactor (5), the second thermochemical reactor (5), and the third thermochemical reactor (5) is switched to 0.01-0.1 MPa, 0.1-0.2 MPa, and 0.2-0.3 MPa, respectively. The first feed water pump (3) is turned off, and the second feed water pump (4) is turned on. The feed water passes through the first thermochemical reactor (5), the second thermochemical reactor (5), and the third thermochemical reactor (5) in sequence, thereby realizing stable output of high-parameter steam.

10. The flexible heat and steam supply control method for a thermochemical energy storage system according to claim 9, characterized in that: When the heat storage power is between 0% and 33%, the electric heating rod (11) in one thermochemical reactor (5) is started; when the heat storage power is between 33% and 66%, the electric heating rods (11) in two thermochemical reactors (5) are started; and when the heat storage power is between 66% and 100%, the electric heating rods (11) in three thermochemical reactors (5) are started.

Images