Thermal chemical energy storage system and method of integrated absorption heat pump

Abstract

The invention discloses a thermochemical energy storage system and method of an integrated absorption heat pump, an outlet of a heat exchange tube is communicated with a shell side inlet of a steam pocket, a shell side outlet of the steam pocket is divided into two paths, one path is communicated with a shell side of a thermochemical reactor, the other path is communicated with an inlet of a second heat exchange tube in the steam pocket, and the other path is communicated with an inlet of a second heat exchange tube in the steam pocket. A shell side outlet of the steam pocket is communicated with a steam exhaust pipeline, a water outlet in the bottom of the shell side of the steam pocket is divided into two paths, one path is communicated with an inlet of the first heat exchange pipe, and the other path is communicated with the pipe side of the evaporator through the pipe side of the generator and the mixed flow valve in sequence; a water vapor outlet in the shell side of the generator communicates with a shell side inlet of the heat exchanger sequentially through the shell side of the condenser, the shell side of the evaporator and the shell side of the absorber, a liquid outlet in the shell side of the heat exchanger communicates with a shell side inlet of the absorber, all-day continuous heat supply can be achieved through the system and method, and heat supply parameters are high.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and relates to a thermochemical energy storage system and method integrated with an absorption heat pump. Background Art

[0002] As a long-term energy storage technology with great potential, thermochemical energy storage (TCES) can theoretically store and release thermal energy through reversible chemical reactions. Thermochemical energy storage relies on reversible chemical reactions (such as decomposition / synthesis, dehydration / hydration, etc.) to achieve heat storage and heat release. However, the rates of many reactions are limited by temperature, pressure and catalyst activity, resulting in a long heat storage and heat release process. For example, the hydrogen absorption / dehydrogenation reaction of certain metal hydrides takes several hours to complete, which makes it difficult to meet the demand for rapid response heating. In practical applications, it faces many technical bottlenecks, making it difficult to achieve stable 24-hour continuous heating, and the heating parameters (such as temperature and power) in the heat storage process are often low. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a thermochemical energy storage system and method integrated with an absorption heat pump, which can achieve continuous heating throughout the day with high heating parameters.

[0004] To achieve the above object, the present invention discloses a thermochemical energy storage system integrated with an absorption heat pump, comprising a thermochemical reactor, a steam drum, an exhaust pipe, an evaporator and a heat exchanger;

[0005] A heating rod and a first heat exchange tube are provided in the shell side of the thermochemical reactor. The outlet of the heat exchange tube is connected to the shell side inlet of the steam drum. The shell side outlet of the steam drum is divided into two paths, one of which is connected to the shell side of the thermochemical reactor, and the other is connected to the inlet of the second heat exchange tube in the steam drum. The shell side outlet of the steam drum is connected to the exhaust pipe. The water outlet at the bottom of the shell side of the steam drum is divided into two paths, one of which is connected to the inlet of the first heat exchange tube, and the other is connected to the tube side of the evaporator in sequence through the tube side of the generator and the mixing valve; the water vapor outlet of the generator shell side is connected to the shell side inlet of the heat exchanger in sequence through the shell side of the condenser, the shell side of the evaporator and the shell side of the absorber, the liquid outlet of the heat exchanger shell side is connected to the shell side inlet of the absorber, the steam outlet of the heat exchanger shell side is connected to the shell side inlet of the generator, and the liquid outlet of the generator shell side is connected to the shell side inlet of the absorber through the tube side of the heat exchanger.

[0006] The further improvement of the thermochemical energy storage system of the integrated absorption heat pump of the present invention is:

[0007] Furthermore, the outlet of the heat exchange tube is connected to the shell side inlet of the steam drum via a fourth switch valve.

[0008] Furthermore, the shell side outlet of the steam drum is divided into two paths after passing through the third switch valve, one of which is connected to the shell side of the thermochemical reactor through the first switch valve, and the other is connected to the inlet of the second heat exchange tube in the steam drum through the second switch valve.

[0009] Furthermore, the shell side outlet of the steam drum is connected to the exhaust pipe through the fifth switching valve.

[0010] Furthermore, the water outlet at the bottom of the steam drum shell is divided into two paths after passing through the sixth switch valve and the first circulation pump, one of which is connected to the inlet of the first heat exchange tube, and the other is connected to the tube side of the evaporator through the second regulating valve, the tube side of the generator, and the mixing valve in sequence.

[0011] Furthermore, it also includes a discharge pipe. The tube side outlet of the absorber is divided into two paths after passing through the tube side of the condenser, one of which is connected to the discharge pipe, and the other is connected to the exhaust pipe through the third regulating valve.

[0012] Furthermore, the outlet of the second heat exchange tube is connected to the tube-side inlet of the generator via the first regulating valve.

[0013] Furthermore, the water vapor outlet on the shell side of the generator is connected to the shell side inlet of the heat exchanger via the shell side of the condenser, the throttle valve, the shell side of the evaporator, the shell side of the absorber and the second circulation pump in sequence.

[0014] Furthermore, the mixing valve is connected to a water inlet pipe.

[0015] The present invention discloses a thermochemical energy storage method for an integrated absorption heat pump, comprising the following steps:

[0016] Heat storage process: The heating rod in the thermochemical reactor is started, the heat storage medium absorbs heat and decomposes water vapor, the first and second on-off valves are opened, and the third on-off valve is closed; the water vapor enters the second heat exchange tube in the steam drum to preheat the feed water, and the cooled steam enters the generator for further cooling. The cooled cooling water passes through the mixing valve, mixes with external water, and enters the evaporator. The working medium in the generator absorbs heat to produce a concentrated solution and water vapor, among which the water vapor enters the condenser, and the concentrated solution passes through the heat exchanger and the second circulation pump to enter the absorber; the water vapor in the condenser releases heat and condenses, then passes through the throttle valve to enter the evaporator to absorb heat and become low-pressure steam, and then enters the absorber; the concentrated solution in the absorber mixes with the water vapor to release heat and heat the feed water, and the heated feed water enters the condenser to increase its temperature. After the temperature is increased, it is directly used for external heating or used to adjust the external steam parameters through the third regulating valve. The dilute solution in the absorber passes through the second circulation pump and heat exchanger and returns to the generator for the next cycle;

[0017] Heat release process: turn off the heating rod, close the second switch valve, open the third switch valve, feed water into the first heat exchange tube to absorb heat, and the generated steam enters the boiler drum through the fourth switch valve; the steam in the boiler drum is supplied to the outside in one way, and the other way passes through the third switch valve and the first switch valve to enter the shell side of the thermochemical reactor as reaction steam; the saturated water in the boiler drum passes through the sixth switch valve and the first circulation pump into the first heat exchange tube; during the heat release process, close the first regulating valve and open the second regulating valve, and the saturated water in the boiler drum is used as the driving heat source of the absorption heat pump system.

[0018] The present invention has the following beneficial effects:

[0019] The thermochemical energy storage system and method of the integrated absorption heat pump described in the present invention integrates the absorption heat pump with the thermochemical reactor during specific operation. During the heat storage process, the heat storage medium is heated by the heat pump to generate water vapor, which enters the steam drum to preheat the feed water. The cooled steam enters the absorption heat pump, and part of the steam in the steam drum is supplied to the outside. During the heat release process, the feed water enters the first heat exchange tube to absorb heat, and enters the steam drum after generating steam. The steam in the steam drum is supplied to the outside all the way, and the saturated water discharged from the steam drum enters the absorption heat pump to achieve 24-hour heating, breaking the technical barrier of low heating parameters in the heat storage process; at the same time, it meets the triple needs of industrial steam, civil heating and cooling, and the parameters of the external steam supply are adjustable. It should be noted that the present invention integrates thermochemistry with the heat pump, which can not only realize energy storage and utilization, but also improve the quality and efficiency of low-temperature heat sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 It is a structural diagram of the present invention.

[0022] Among them, 1 is a thermochemical reactor, 1.1 is a first heat exchange tube, 1.2 is a heating rod, 2 is a first switch valve, 3 is a second switch valve, 4 is a steam drum, 4.1 is a second heat exchange tube, 5 is a third switch valve, 6 is a fourth switch valve, 7 is a fifth switch valve, 8 is a sixth switch valve, 9 is a first circulation pump, 10 is a first regulating valve, 11 is a second regulating valve, 12 is a generator, 13 is a heat exchanger, 14 is a second circulation pump, 15 is an absorber, 16 is a condenser, 17 is a throttle valve, 18 is a mixing valve, 19 is an evaporator, and 20 is a third regulating valve. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] As is known to all, a thermochemical reactor is a device that realizes a specific chemical reaction process. It uses heat energy to drive chemical reactions and is widely used in many fields such as chemical industry, energy, and environmental protection. The following is a detailed introduction to thermochemical reactors:

[0032] A thermochemical reactor provides the necessary heat and reaction environment to enable raw materials to undergo a chemical reaction under certain conditions to produce the desired product. The principle generally involves the transfer and utilization of thermal energy to accelerate or promote the chemical reaction.

[0033] Main types

[0034] Tank Reactor: Structure: Primarily composed of an agitator, tank, jacket, extrusion pipe, manhole, shaft seal, transmission device, and support. Application: Widely used in organic and fine chemical production, suitable for homogeneous reactions such as esterification and saponification, as well as multiphase reactions such as liquid-phase, liquid-liquid, liquid-solid, and gas-liquid-solid. Features: Wide applicable temperature and pressure range, strong adaptability, and high operational flexibility.

[0035] Tubular Reactors: Structure: Available in single-tube and multi-tube configurations. Multi-tube reactors can be connected in parallel or in series. Applications: Mostly used in continuous reactions, such as petroleum hydrocarbon cracking to produce ethylene and propylene, vinyl chloride synthesis, and ethylene oxide synthesis. Features: Minimal backmixing. At low flow rates, the flow pattern within the tubes approaches that of an ideal flow.

[0036] Tower Reactors: Common structures include plate towers, packed towers, spray towers, and bubble towers. Applications: In addition to being widely used in distillation, absorption, desorption, and extraction, they can also be used as reactors for gas-liquid reactions. Features: Plate and packed towers are primarily used in processes where two fluids react. Spray towers disperse liquid into a gas in the form of droplets, while bubble towers allow gas to react as bubbles through a liquid layer.

[0037] Fixed-Bed Reactor: Structure: The reactor is filled with stationary solid catalyst particles or solid reactants. Application: Primarily used for gas-solid phase catalytic reactions, such as ammonia synthesis towers, sulfur dioxide contact oxidizers, and hydrocarbon steam reformers. Features: Simple structure, minimal auxiliary equipment required, and easy operation.

[0038] Fluidized Bed Reactor: Principle: Utilizes gas or liquid passing through a granular solid layer to suspend the solid particles, allowing for gas-solid or liquid-solid phase reactions. Applications: Widely used in the chemical, petroleum, metallurgical, and nuclear industries. Features: Excellent heat transfer, uniform and easily controllable temperature within the bed, and suitable for highly exothermic reactions.

[0039] Example 1

[0040] refer to Figure 1 The thermochemical energy storage system of the integrated absorption heat pump of the present invention comprises a thermochemical reactor 1, a steam drum 4, an exhaust pipe, an evaporator 19 and a heat exchanger 13;

[0041] The shell side of the thermochemical reactor 1 is provided with a heating rod 1.2 and a first heat exchange tube 1.1. The outlet of the heat exchange tube 1.1 is connected to the shell side inlet of the drum 4. The shell side outlet of the drum 4 is divided into two paths, one of which is connected to the shell side of the thermochemical reactor 1, and the other is connected to the inlet of the second heat exchange tube 4.1 in the drum 4. The shell side outlet of the drum 4 is connected to the exhaust pipe. The water outlet at the bottom of the shell side of the drum 4 is divided into two paths, one of which is connected to the inlet of the first heat exchange tube 1.1, and the other is connected to the generator in sequence. The tube side of 12 and the mixing valve 18 are connected with the tube side of the evaporator 19; the water vapor outlet on the shell side of the generator 12 is connected with the shell side inlet of the heat exchanger 13 in sequence through the shell side of the condenser 16, the shell side of the evaporator 19 and the shell side of the absorber 15, the liquid outlet on the shell side of the heat exchanger 13 is connected with the shell side inlet of the absorber 15, the steam outlet on the shell side of the heat exchanger 13 is connected with the shell side inlet of the generator 12, and the liquid outlet on the shell side of the generator 12 is connected with the shell side inlet of the absorber 15 through the tube side of the heat exchanger 13.

[0042] Example 2

[0043] refer to Figure 1To further improve this application, the thermochemical energy storage system of the integrated absorption heat pump of the present invention includes a thermochemical reactor 1, a first switch valve 2, a second switch valve 3, a steam drum 4, a third switch valve 5, a fourth switch valve 6, a fifth switch valve 7, a sixth switch valve 8, a first circulation pump 9, a first regulating valve 10, a second regulating valve 11, a generator 12, a heat exchanger 13, a second circulation pump 14, an absorber 15, a condenser 16, a throttle valve 17, a mixing valve 18, an evaporator 19 and a third regulating valve 20;

[0044] A heating rod 1.2 and a first heat exchange tube 1.1 are provided in the shell side of the thermochemical reactor 1. The outlet of the heat exchange tube 1.1 is connected to the shell side inlet of the drum 4 via a fourth switch valve 6. The shell side outlet of the drum 4 is divided into two paths after passing through a third switch valve 5. One path is connected to the shell side of the thermochemical reactor 1 via the first switch valve 2, and the other path is connected to the inlet of the second heat exchange tube 4.1 in the drum 4 via the second switch valve 3. The shell side outlet of the drum 4 is connected to the exhaust pipe via a fifth switch valve 7. The water outlet at the bottom of the shell side of the drum 4 is divided into two paths after passing through a sixth switch valve 8 and a first circulation pump 9. One path is connected to the first heat exchange tube 1.1. The shell side of the generator 12 is connected to the shell side of the absorber 15, and the steam outlet on the shell side of the heat exchanger 13 is connected to the shell side inlet of the absorber 15, and the steam outlet on the shell side of the heat exchanger 13 is connected to the shell side inlet of the generator 12, and the liquid outlet on the shell side of the generator 12 is connected to the shell side inlet of the absorber 15 through the tube side of the heat exchanger 13.

[0045] The tube side outlet of the absorber 15 is divided into two paths after passing through the tube side of the condenser 16, one of which is connected to the exhaust pipe, and the other is connected to the exhaust pipe through the third regulating valve 20; the outlet of the second heat exchange tube 4.1 is connected to the tube side inlet of the generator 12 through the first regulating valve 10.

[0046] Example 3

[0047] refer to Figure 1The present invention discloses a thermochemical energy storage method for an integrated absorption heat pump. The thermochemical energy storage method for the integrated absorption heat pump is implemented based on the thermochemical energy storage system of the integrated absorption heat pump. The thermochemical energy storage system of the integrated absorption heat pump includes a thermochemical reactor 1, a first switch valve 2, a second switch valve 3, a steam drum 4, a third switch valve 5, a fourth switch valve 6, a fifth switch valve 7, a sixth switch valve 8, a first circulation pump 9, a first regulating valve 10, a second regulating valve 11, a generator 12, a heat exchanger 13, a second circulation pump 14, an absorber 15, a condenser 16, a throttle valve 17, a mixing valve 18, an evaporator 19 and a third regulating valve 20. The specific connection method is as shown in Example 1.

[0048] The thermochemical energy storage method of the integrated absorption heat pump comprises the following steps:

[0049] Heat storage process: The heating rod 1.2 in the thermochemical reactor 1 is activated, the heat storage medium absorbs heat and decomposes into water vapor. The first and second on-off valves 2 and 3 are opened, and the third on-off valve 5 is closed. The water vapor enters the second heat exchange tube 4.1 in the steam drum 4 to preheat the feed water. The cooled steam enters the generator 12 for further cooling. The cooled cooling water passes through the mixing valve 18, mixes with external water, and enters the evaporator 19. The working fluid in the generator 12 absorbs heat to produce a concentrated solution and water vapor. The water vapor enters the condenser 16, and the concentrated solution passes through the heat exchanger 13 and the second circulating pump 14 to enter the absorber 15. The water vapor in the condenser 16 releases heat and condenses. It then passes through the throttle valve 17 and enters the evaporator 19, where it absorbs heat and becomes low-pressure steam. It then enters the absorber 15. The concentrated solution in the absorber 15 mixes with the water vapor, releasing heat to heat the feed water. The heated feed water enters the condenser 16 to increase its temperature. After the temperature is increased, it can be directly used for external heating or used to adjust the parameters of the external steam supply through the third regulating valve 20. The dilute solution in the absorber 15 is returned to the generator 12 through the second circulation pump 14 and the heat exchanger 13 for the next circulation.

[0050] During the heat release process, heating rod 1.2 is turned off, second on-off valve 3 is closed, and third on-off valve 5 is opened. Feedwater enters first heat exchange tube 1.1 to absorb heat, generating steam that passes through fourth on-off valve 6 and enters drum 4. Steam within drum 4 is supplied externally through one path and enters the shell side of thermochemical reactor 1 as reaction steam via third on-off valve 5 and first on-off valve 2. Saturated water within drum 4 passes through sixth on-off valve 8 and first circulation pump 9 and enters first heat exchange tube 1.1. During the heat release process, first regulating valve 10 is closed and second regulating valve 11 is opened. The saturated water within drum 4 serves as the driving heat source for the absorption heat pump system. The operation of the absorption heat pump is similar to that during the heat storage process.

[0051] Cooling mode: By adjusting the opening of the throttle valve 17, the pressure and temperature entering the evaporator 19 are adjusted. At this time, the first regulating valve 10 and the second regulating valve 11 are closed, and the external water enters the evaporator 19 and is cooled and can be used for cooling.

[0052] 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.

[0053] 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.

[0054] 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 thermochemical energy storage system integrated with an absorption heat pump, characterized in that: It comprises a thermochemical reactor (1), a steam drum (4), an exhaust pipe, an evaporator (19) and a heat exchanger (13); A heating rod (1.2) and a first heat exchange tube (1.1) are provided in the shell side of the thermochemical reactor (1). The outlet of the heat exchange tube (1.1) is connected to the shell side inlet of the drum (4). The shell side outlet of the drum (4) is divided into two paths, one of which is connected to the shell side of the thermochemical reactor (1) and the other is connected to the inlet of the second heat exchange tube (4.1) in the drum (4). The shell side outlet of the drum (4) is connected to the exhaust pipe. The water outlet at the bottom of the shell side of the drum (4) is divided into two paths, one of which is connected to the inlet of the first heat exchange tube (1.1) and the other is connected to the generator (12 ) is connected to the tube side of the evaporator (19) through the tube side and the mixing valve (18); the water vapor outlet on the shell side of the generator (12) is connected to the shell side inlet of the heat exchanger (13) through the shell side of the condenser (16), the shell side of the evaporator (19) and the shell side of the absorber (15) in sequence; the liquid outlet on the shell side of the heat exchanger (13) is connected to the shell side inlet of the absorber (15); the steam outlet on the shell side of the heat exchanger (13) is connected to the shell side inlet of the generator (12); and the liquid outlet on the shell side of the generator (12) is connected to the shell side inlet of the absorber (15) through the tube side of the heat exchanger (13).

2. The thermochemical energy storage system of the integrated absorption heat pump according to claim 1, characterized in that: The outlet of the heat exchange tube (1.1) is connected to the shell-side inlet of the steam drum (4) via a fourth switch valve (6).

3. The thermochemical energy storage system of the integrated absorption heat pump according to claim 2, characterized in that: The shell side outlet of the drum (4) is divided into two paths after passing through the third switch valve (5), one of which is connected to the shell side of the thermochemical reactor (1) through the first switch valve (2), and the other is connected to the inlet of the second heat exchange tube (4.1) in the drum (4) through the second switch valve (3).

4. The thermochemical energy storage system of the integrated absorption heat pump according to claim 3, characterized in that: The shell side outlet of the steam drum (4) is connected to the exhaust pipe via the fifth switch valve (7).

5. The thermochemical energy storage system integrated with an absorption heat pump according to claim 4, characterized in that: The water outlet at the bottom of the shell side of the drum (4) is divided into two paths after passing through the sixth switch valve (8) and the first circulation pump (9), one of which is connected to the inlet of the first heat exchange tube (1.1), and the other is connected to the tube side of the evaporator (19) through the second regulating valve (11), the tube side of the generator (12), and the mixing valve (18) in sequence.

6. The thermochemical energy storage system integrated with an absorption heat pump according to claim 5, characterized in that: It also includes a discharge pipe. The tube side outlet of the absorber (15) is divided into two paths after passing through the tube side of the condenser (16). One path is connected to the discharge pipe, and the other path is connected to the exhaust pipe through the third regulating valve (20).

7. The thermochemical energy storage system integrated with an absorption heat pump according to claim 6, characterized in that: The outlet of the second heat exchange tube (4.1) is connected to the tube-side inlet of the generator (12) via the first regulating valve (10).

8. The thermochemical energy storage system integrated with an absorption heat pump according to claim 7, characterized in that: The water vapor outlet on the shell side of the generator (12) is connected to the shell side inlet of the heat exchanger (13) through the shell side of the condenser (16), the throttle valve (17), the shell side of the evaporator (19), the shell side of the absorber (15) and the second circulation pump (14) in sequence.

9. The thermochemical energy storage system integrated with an absorption heat pump according to claim 1, characterized in that: The mixing valve (18) is connected to a water inlet pipe.

10. A thermochemical energy storage method integrated with an absorption heat pump, characterized in that: The thermochemical energy storage system based on the integrated absorption heat pump according to claim 8 comprises the following steps: Heat storage process: The heating rod (1.2) in the thermochemical reactor (1) is started, the heat storage medium absorbs heat and decomposes water vapor, the first switch valve (2) and the second switch valve (3) are opened, and the third switch valve (5) is closed; the water vapor enters the second heat exchange pipe (4.1) in the steam drum (4) to preheat the feed water, and the cooled steam enters the generator (12) for further cooling. The cooled cooling water passes through the mixing valve (18) and is mixed with external water before entering the evaporator (19). The working medium in the generator (12) absorbs heat to produce a concentrated solution and water vapor, wherein the water vapor enters the condenser (16), and the concentrated solution passes through the heat exchanger (13 ) and the second circulation pump (14) into the absorber (15); the water vapor in the condenser (16) releases heat and condenses, then enters the evaporator (19) through the throttle valve (17) to absorb heat and become low-pressure steam, and then enters the absorber (15); the concentrated solution in the absorber (15) mixes with the water vapor to release heat and heat the feed water, and the heated feed water enters the condenser (16) to increase the temperature, and after the temperature is increased, it is directly used for external heating, or is used for external steam parameter adjustment through the third regulating valve (20). The dilute solution in the absorber (15) passes through the second circulation pump (14) and the heat exchanger (13) and returns to the generator (12) for the next cycle; Heat release process: the heating rod (1.2) is closed, the second switch valve (3) is closed, the third switch valve (5) is opened, the feed water enters the first heat exchange tube (1.1) to absorb heat, and the generated steam enters the steam drum (4) through the fourth switch valve (6); the steam in the steam drum (4) is supplied to the outside in one path, and the other path enters the shell side of the thermochemical reactor (1) as reaction steam through the third switch valve (5) and the first switch valve (2); the saturated water in the steam drum (4) enters the first heat exchange tube (1.1) through the sixth switch valve (8) and the first circulation pump (9); during the heat release process, the first regulating valve (10) is closed, the second regulating valve (11) is opened, and the saturated water in the steam drum (4) serves as the driving heat source of the absorption heat pump system.

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