A pressure-type high-temperature thermochemical heat storage tank system and its working method

Abstract

The present invention discloses a pressure-type high-temperature thermochemical heat storage tank system and a working method thereof, which is suitable for gas (steam)-solid reversible reaction systems such as Ca(OH)2 / CaO+H2O. The system comprises a reaction tank, a pressure-surge tank, a water storage tank, a booster pump, a vacuum pump, a cooler, a reaction steam pipeline, a vacuum pipeline, a steam generation pipeline, a cooling spray pipeline, a drain pipeline and valves corresponding to each pipeline. The pressure-type reaction tank is used to increase the equilibrium temperature of the reversible chemical reaction to increase the heat storage temperature, the pressure of the reaction tank is stabilized by evaporation or condensation of water and water vapor in the pressure-surge tank, the liquid water required by the system is stored in the water storage tank, and the water level of the pressure-surge tank is balanced by draining or pressurized pumping, so as to realize the storage and release of high-temperature thermal energy, and the heat storage and release process is completely decoupled. The system does not need to transport the reaction materials, and can realize long-term thermal energy storage. The system is simple and can be used for large-scale thermal energy storage.

Description

Technical Field

[0001] The invention relates to an energy storage system, and in particular to a pressure-type high-temperature thermochemical heat storage tank system and a working method thereof. Background Art

[0002] Energy storage is an important technical field in the current energy system, and heat storage technology is an important aspect of it, especially for fields such as solar thermal power generation, which plays a vital role. At present, large-scale thermal energy storage is still dominated by sensible heat storage. Sensible heat storage technology is simple and easy to implement, but the heat storage density is low, and high-temperature heat storage materials are expensive and have high requirements for use. It is impossible to achieve long-term storage of thermal energy, so its application effect and scale are subject to certain restrictions. Thermochemical heat storage uses reversible thermochemical reactions to store thermal energy in chemical bonds, such as the reversible reaction of Ca(OH)2 / CaO+H2O. It has the characteristics of high energy storage density and long-term lossless storage, and is one of the most promising technical directions for high-temperature heat source heat storage. However, due to the complexity of the chemical heat storage system, the reaction system needs to transport a large amount of reaction materials, which requires mechanical transportation, pneumatic transportation or fluidized bed, etc. The system is complex and large, and in addition to the storage and release process of chemical energy, there is also the change process of sensible heat of the reaction materials and the phase change process, which brings greater difficulty. Therefore, there is no mature application system at present. Summary of the invention

[0003] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a pressure-type high-temperature thermochemical heat storage tank system and a working method thereof, which is suitable for gas (steam)-solid reversible reaction systems such as Ca(OH)2 / CaO+H2O, and utilizes a pressure-type reaction tank to increase the reversible reaction equilibrium temperature to reach the required heat storage temperature (such as 0.5MPa, 600℃), and simultaneously performs the heat storage and heat release processes, stabilizes the reaction tank pressure through the phase change of the steam-water two-phase at the saturated temperature in the pressure-stabilizing tank, and stores a large amount of water required for the reaction in a liquid state at normal pressure.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] A pressure-type high-temperature thermochemical heat storage tank system, comprising a reaction tank 1, a pressure-stabilizing tank 2, a water storage tank 3, a booster pump 4, a vacuum pump 5, a cooler 6, a reaction steam pipeline 18, a vacuum pumping pipeline 19, a steam generating pipeline 20, a cooling spray pipeline 21, a drain pipeline 22 and corresponding valves of each pipeline; wherein the reaction tank 1 is composed of a vacuum insulation layer 10, a reaction material 9, a steam generator 11, a primary heat exchanger pipeline 7 and a secondary heat exchanger pipeline 8, and the pressure-stabilizing tank 2 is provided with a cooling sprayer 12;

[0006] The reaction tank 1 is filled with reaction material 9, the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 are arranged in the reaction material 9, and heat exchange medium flows through the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8, and the heat exchange medium is isolated from the reaction material; the steam generator 11 is located in the upper space of the reaction tank to heat the liquid water in the steam generation pipeline into water vapor; the pressure-surge tank 2 is connected to the upper space of the reaction tank 1 through the reaction steam pipeline 18, and the reaction steam valve 13 is arranged on the reaction steam pipeline 18 to stabilize the pressure of the reaction tank 1 through the evaporation or condensation of water and water vapor; the cooling sprayer 12 in the pressure-surge tank 2 is connected to the cooling spray pipeline 21, and the cooling spray pipeline 21 is provided with a spray valve 16, which is used to uniformly spray the low-temperature liquid water from the cooling spray pipeline 21 into the upper space of the pressure-surge tank 2 The high-temperature superheated steam from the reaction tank 1 is cooled in the steam space; the bottom of the surge tank 2 is connected to the water tank 3 through a drain pipe 22, and a drain valve 15 and a cooler 6 are arranged on the drain pipe 22, which are used to discharge the liquid water in the surge tank 2 to the water tank 3 to control the water level of the surge tank 2; the water tank 3 is connected to the booster pump 4, and the booster pump 4 is connected to the steam generation pipe 20 through the steam generator 11 and then connected to the surge tank 2 and the cooling spray pipe 21, and the steam generation pipe 20 is provided with a steam generation valve 14, and the booster pump 4 pressurizes the liquid water in the water tank 3 and sends it into the steam generation pipe 20 and the cooling spray pipe 21; the top of the reaction tank 1 is connected to the vacuum pumping pipe 19, and the vacuum pump 5 and the vacuum valve 17 are arranged on the vacuum pumping pipe 19 to extract the air or water vapor in the reaction tank 1.

[0007] The reaction tank 1 is a steel pressure container that can withstand high temperatures and has a vacuum insulation layer on the outside. The reaction material 9 in the reaction tank 1 is Ca(OH) 2 or CaO powder.

[0008] The heat exchange medium in the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 is air or water vapor. The primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 are arranged in a circular tube serpentine manner, providing sufficient heat exchange area and allowing the heat exchange medium to exchange heat evenly with the reaction material 9; the primary heat exchanger pipeline 7 is a medium loop for inputting heat, and inputs the heat source to be stored into the reaction storage tank 1, and the secondary heat exchanger pipeline 8 is a medium loop for outputting heat, and provides output heat for heat users.

[0009] The pressure stabilizing tank 2 is a steel pressure-bearing container that can withstand high temperatures, and has a heat-insulating structure and material on the outside. The volume of the pressure stabilizing tank 2 is much smaller than that of the reaction storage tank 1 .

[0010] The water storage tank 3 is a normal pressure container with an external heat-insulating structure and material, and its function is to store sufficient liquid water below 100° C. to ensure the use of chemical reactions and the need to cool the superheated steam in the surge tank.

[0011] The steam generation pipeline 20 is equipped with a steam superheater to heat the liquid water and inject it into the surge tank 2 when the system releases energy. The cooling spray pipeline 21 is equipped with a cooler to cool the high-temperature liquid water in the surge tank 2 to below 100°C through air and discharge it into the water storage tank 3 when the system stores energy.

[0012] The reaction steam pipeline 18 connects the reaction tank 1 with the water vapor space of the pressure-surge tank 2 , and the water vapor can flow in both directions according to the chemical reaction direction of the reaction tank.

[0013] The pressure-type high-temperature thermochemical heat storage tank system can be used in parallel in multiples to increase the energy storage scale of the system.

[0014] The working method of the pressure-type high-temperature thermochemical heat storage tank system is as follows: during energy storage, the high-temperature medium in the primary heat exchanger pipeline 7 in the reaction storage tank 1 transfers heat to the reaction material 9, and when the temperature is higher than the reversible reaction equilibrium temperature, the reaction material 9 undergoes an endothermic dehydration reaction to generate high-temperature water vapor, and the generated high-temperature water vapor enters the steam space of the surge tank 2 through the reaction steam pipeline 18, and at the same time, the booster pump 4 sprays the relatively low-temperature liquid water in the water storage tank 3 through the cooling spray pipeline 21 and the sprayer 12 into the surge tank 2, and the liquid water is mixed with the high-temperature water vapor in the surge tank 2 to reduce the temperature, and the spray valve 16 is controlled to adjust the spray flow rate to stabilize the pressure of the surge tank 2; the water level of the surge tank 2 is adjusted by the drain pipeline 22 and the drain valve 15, and the discharged water is cooled by the cooler 6 and then discharged into the water storage tank 3;

[0015] When releasing energy, the medium in the secondary heat exchanger pipeline 8 in the reaction storage tank 1 absorbs heat from the bed of the reaction material 9. When the temperature is lower than the reversible reaction equilibrium temperature, the reaction material 9 undergoes a heat release hydration reaction, consuming water vapor. The water vapor is introduced from the steam space of the surge tank 2 through the reaction steam pipeline 18. At the same time, the booster pump 4 heats the liquid water in the water storage tank 3 into steam through the steam generation pipeline 20 by the steam generator 11. The steam generation flow is controlled by the steam generation valve 14 and injected into the surge tank 2 to stabilize the pressure and water level of the surge tank 2.

[0016] When energy storage and energy release are carried out simultaneously, the heat exchange medium in the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 in the reaction storage tank 1 flows and exchanges heat simultaneously, and the reaction direction of the reaction material 9 in the reaction storage tank 1 is determined by the temperature of the material. At this time, it is only necessary to control the spray flow of the pressure stabilizing tank 2 or the amount of steam injected into the pressure stabilizing tank 2 by the steam generator 11 to maintain the pressure in the pressure stabilizing tank 2, so as to ensure the normal operation of the energy storage and release process of the reaction storage tank 1;

[0017] When the system is shut down or cold-started, it is necessary to start the vacuum pump 5, close the reaction steam valve 13, open the vacuum valve 17, and evacuate the system to a vacuum for long-term storage of the reaction materials.

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

[0019] The present invention adopts a pressure-type reaction storage tank, and utilizes the characteristic that the reaction equilibrium temperature of a reversible chemical reaction increases with the pressure to increase the heat storage temperature. The pressure of the reaction storage tank is stabilized by evaporation or condensation of water or water vapor at the saturated temperature in the pressure-stabilizing tank. Liquid water required by the system is stored in a water tank, and the water level of the pressure-stabilizing tank is balanced by hydrophobic or pressurized pumping, thereby realizing the storage and release of high-temperature thermal energy. The heat storage and release process is completely decoupled, the system does not require the transportation of reaction materials, and can realize long-term thermal energy storage. The system is simple and can be used for large-scale thermal energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the system composition of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0022] refer to Figure 1The present invention discloses a pressure-type high-temperature thermochemical heat storage tank system, which is composed of a reaction tank 1, a pressure-stabilizing tank 2, a water storage tank 3, a booster pump 4, a vacuum pump 5, a cooler 6, a reaction steam pipeline 18, a vacuum pipeline 19, a steam generation pipeline 20, a cooling spray pipeline 21, a drain pipeline 22 and corresponding valves of each pipeline; wherein the reaction tank 1 is composed of a vacuum insulation layer 10, a reaction material 9, a steam generator 11, a primary heat exchanger pipeline 7 and a secondary heat exchanger pipeline 8, and the pressure-stabilizing tank 2 is provided with a cooling sprayer 12; the reaction tank 1 is filled with a reaction material 9 such as Ca(OH)2 or CaO powder, and its reaction equation is Ca(OH)2<——>CaO+H2O, and other similar gas-solid reversible reactions can also be realized, such as Mg(OH)2 / MgO+H2O and other reactions. The primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 are both arranged in the reaction material 9, and heat exchange medium flows through the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8, and the heat exchange medium is isolated from the reaction material; the steam generator 11 is located in the upper space of the reaction tank to heat the liquid water in the steam generation pipeline into water vapor; the surge tank 2 is connected to the upper space of the reaction tank 1 through the reaction steam pipeline 18, and a reaction steam valve 13 is arranged on the reaction steam pipeline 18 to stabilize the pressure of the reaction tank 1 through the evaporation or condensation of water and water vapor; the cooling sprayer 12 in the surge tank 2 is connected to the cooling spray pipeline 21, and a spray valve 16 is arranged on the cooling spray pipeline 21 to uniformly spray the low-temperature liquid water from the cooling spray pipeline 21 into the upper steam space of the surge tank 2, and the cooling The high-temperature superheated steam from the reaction tank 1 is removed; the bottom of the surge tank 2 is connected to the water tank 3 through a drain pipe 22, and a drain valve 15 and a cooler 6 are arranged on the drain pipe 22, which are used to discharge the liquid water in the surge tank 2 to the water tank 3 to control the water level of the surge tank 2; the water tank 3 is connected to the booster pump 4, and the booster pump 4 is connected to the steam generating pipe 20 through the steam generator 11 and then connected to the surge tank 2 and the cooling spray pipe 21, and the steam generating pipe 20 is provided with a steam generating valve 14, and the booster pump 4 pressurizes the liquid water in the water tank 3 and sends it into the steam generating pipe 20 and the cooling spray pipe 21; the top of the reaction tank 1 is connected to the vacuum pumping pipe 19, and the vacuum pump 5 and the vacuum valve 17 are arranged on the vacuum pumping pipe 19 to extract the air or water vapor in the reaction tank 1.

[0023] As a preferred embodiment of the present invention, the reaction tank 1 is a steel pressure container that can withstand high temperatures and has a vacuum insulation layer on the outside. The reaction material 9 in the reaction tank 1 is Ca(OH) 2 or CaO powder.

[0024] As a preferred embodiment of the present invention, the heat exchange medium in the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 is air or water vapor, and the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 are arranged in a circular tube serpentine manner, providing sufficient heat exchange area and allowing the heat exchange medium to exchange heat evenly with the reaction material 9; the primary heat exchanger pipeline 7 is a medium loop for inputting heat, and the heat source to be stored is input into the reaction storage tank 1, and the secondary heat exchanger pipeline 8 is a medium loop for outputting heat, and provides output heat for heat users.

[0025] As a preferred embodiment of the present invention, the pressure stabilizing tank 2 is a steel pressure-bearing container that can withstand high temperatures, and has a heat-insulating structure and material on the outside. The volume of the pressure stabilizing tank 2 is much smaller than that of the reaction storage tank 1.

[0026] As a preferred embodiment of the present invention, the water storage tank 3 is a normal pressure container with an external insulation structure and material, and its function is to store sufficient liquid water below 100°C to ensure the use of chemical reactions and the need to cool the superheated steam in the surge tank.

[0027] As a preferred embodiment of the present invention, a steam superheater is installed in the steam generation pipeline 20, and liquid water is heated and injected into the surge tank 2 when the system releases energy. A cooler is installed in the cooling spray pipeline 21, and the high-temperature liquid water in the surge tank 2 is cooled to below 100°C by air and discharged into the water storage tank 3 when the system stores energy.

[0028] As a preferred embodiment of the present invention, the reaction steam pipeline 18 connects the reaction tank 1 with the water vapor space of the pressure-surge tank 2 , and the water vapor can flow in both directions according to the chemical reaction direction of the reaction tank.

[0029] As a preferred embodiment of the present invention, the pressure-type high-temperature thermochemical heat storage tank system can be used in parallel in multiples to increase the energy storage scale of the system.

[0030] The specific working process of the present invention is:

[0031] During energy storage, the high-temperature medium in the primary heat exchanger pipeline 7 in the reaction storage tank 1 transfers heat to the reaction material 9. When the temperature is higher than the reversible reaction equilibrium temperature, the reaction material 9 undergoes an endothermic dehydration reaction such as Ca(OH)2=>CaO+H2O to generate high-temperature water vapor. The generated high-temperature water vapor enters the steam space of the pressure-surge tank 2 through the reaction steam pipeline 18. At the same time, the booster pump 4 sprays the lower-temperature liquid water in the water storage tank 3 into the pressure-surge tank 2 through the cooling spray pipeline 21 by the sprayer 12, and mixes with the high-temperature water vapor in the pressure-surge tank 2 to cool it. The spray valve 16 is controlled to adjust the spray flow rate to stabilize the pressure of the pressure-surge tank 2; the water level of the pressure-surge tank 2 is adjusted by the drain pipeline 22 and the drain valve 15, and the discharged water is cooled by the cooler 6 and then discharged into the water storage tank 3.

[0032] When releasing energy, the medium in the secondary heat exchanger pipeline 8 in the reaction storage tank 1 absorbs heat from the bed of the reaction material 9. When the temperature is lower than the reversible reaction equilibrium temperature, the reaction material 9 undergoes an exothermic hydration reaction such as CaO+H2O=>Ca(OH)2, consuming water vapor. The water vapor is introduced from the steam space of the pressure-surge tank 2 through the reaction steam pipeline 18. At the same time, the booster pump 4 heats the liquid water in the water tank 3 into steam through the steam generating pipeline 20 by the steam generator 11. The flow rate of steam generation is controlled by the steam generating valve 14 and injected into the pressure-surge tank 2 to stabilize the pressure and water level of the pressure-surge tank 2.

[0033] When energy storage and energy release are carried out simultaneously, the heat exchange medium in the primary heat exchanger pipeline 7 and the secondary heat exchanger pipeline 8 in the reaction tank 1 flows and exchanges heat at the same time. The reaction direction of the reaction material 9 in the reaction tank 1 is determined by the temperature of the material. At this time, it is only necessary to control the spray flow of the pressure stabilizing tank 2 or the amount of steam injected into the pressure stabilizing tank 2 by the steam generator 11 to maintain the pressure in the pressure stabilizing tank 2, so as to ensure the normal operation of the energy storage and release process of the reaction tank 1.

[0034] When the system is shut down or cold-started, it is necessary to start the vacuum pump 5, close the reaction steam valve 13, open the vacuum valve 17, and evacuate the system to a vacuum, so that the reaction materials can be stored for a long time.

[0035] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure-type high-temperature thermochemical heat storage tank system, characterized in that: The invention comprises a reaction storage tank (1), a pressure regulating tank (2), a water storage tank (3), a booster pump (4), a vacuum pump (5), a cooler (6), a reaction steam pipeline (18), a vacuum pump pipeline (19), a steam generating pipeline (20), a cooling spray pipeline (21), a drain pipeline (22) and corresponding valves of each pipeline; wherein the reaction storage tank (1) comprises a vacuum insulation layer (10), reaction materials (9), a steam generator (11), a primary heat exchanger pipeline (7) and a secondary heat exchanger pipeline (8); and the pressure regulating tank (2) is provided with a cooling sprayer (12); The reaction tank (1) is filled with reaction material (9), the primary heat exchanger pipeline (7) and the secondary heat exchanger pipeline (8) are arranged in the reaction material (9), a heat exchange medium flows through the primary heat exchanger pipeline (7) and the secondary heat exchanger pipeline (8), and the heat exchange medium is isolated from the reaction material; the steam generator (11) is located in the upper space of the reaction tank to heat the liquid water in the steam generation pipeline into water vapor; the pressure stabilizing tank (2) is connected to the reaction tank through the reaction steam pipeline (18). The upper space of the tank (1) is connected, and a reaction steam valve (13) is arranged on the reaction steam pipeline (18) to stabilize the pressure of the reaction storage tank (1) by evaporation or condensation of water and water vapor; the cooling sprayer (12) in the pressure stabilizing tank (2) is connected to the cooling spray pipeline (21), and a spray valve (16) is arranged on the cooling spray pipeline (21) to uniformly spray low-temperature liquid water from the cooling spray pipeline (21) into the upper steam space of the pressure stabilizing tank (2) to cool the reaction tank (1). The bottom of the surge tank (2) is connected to the water storage tank (3) through a drain pipe (22), and a drain valve (15) and a cooler (6) are provided on the drain pipe (22) to discharge the liquid water in the surge tank (2) to the water storage tank (3) to control the water level of the surge tank (2); the water storage tank (3) is connected to a booster pump (4), and the booster pump (4) is connected to the steam generation pipe (20) through a steam generator (11) and then connected to the surge tank (2), and the booster pump (4) is connected to the steam generation pipe (20) through a steam generator (11). The boost pump (4) is simultaneously connected to the cooling spray pipeline (21), and a steam generating valve (14) is provided on the steam generating pipeline (20). The boost pump (4) pressurizes the liquid water in the water storage tank (3) and then sends it into the steam generating pipeline (20) and the cooling spray pipeline (21); the top of the reaction tank (1) is connected to the vacuum pumping pipeline (19), and the vacuum pump (5) and the vacuum valve (17) are provided on the vacuum pumping pipeline (19) for extracting air or water vapor in the reaction tank (1); The reaction tank (1) is a steel pressure-bearing container capable of withstanding high temperatures and having a vacuum insulation layer on the outside. The reaction material (9) in the reaction tank (1) is Ca(OH)2 or CaO powder; The heat exchange medium in the primary heat exchanger pipeline (7) and the secondary heat exchanger pipeline (8) is air or water vapor. The primary heat exchanger pipeline (7) and the secondary heat exchanger pipeline (8) are arranged in a circular tube serpentine manner to provide a sufficient heat exchange area and enable the heat exchange medium and the reaction material (9) to exchange heat evenly. The primary heat exchanger pipeline (7) is a medium loop for inputting heat, and inputs the heat source to be stored into the reaction storage tank (1). The secondary heat exchanger pipeline (8) is a medium loop for outputting heat, and provides output heat for heat users.

2. The pressure-type high-temperature thermochemical heat storage tank system according to claim 1 is characterized in that: The pressure stabilizing tank (2) is a steel pressure-bearing container capable of withstanding high temperatures, and has a heat-insulating structure and material on the outside. The volume of the pressure stabilizing tank (2) is much smaller than that of the reaction storage tank (1).

3. The pressure-type high-temperature thermochemical heat storage tank system according to claim 1 is characterized in that: The water storage tank (3) is a normal pressure container with a heat-insulating structure and material on the outside. Its function is to store enough liquid water below 100° C. to ensure the use of chemical reactions and the need to cool the superheated steam in the surge tank.

4. The pressure-type high-temperature thermochemical heat storage tank system according to claim 1 is characterized in that: A steam superheater is installed in the steam generation pipeline (20) to heat liquid water and inject it into the pressure-surge tank (2) when the system releases energy; a cooler is installed in the cooling spray pipeline (21) to cool the high-temperature liquid water in the pressure-surge tank (2) to below 100° C. through air and discharge it into the water storage tank (3) when the system stores energy.

5. The pressure-type high-temperature thermochemical heat storage tank system according to claim 1 is characterized in that: The reaction steam pipeline (18) connects the reaction tank (1) with the water vapor space of the pressure-surge tank (2), and the water vapor can flow in both directions according to the chemical reaction direction of the reaction tank.

6. The pressure-type high-temperature thermochemical heat storage tank system according to claim 1 is characterized in that: Multiple units can be used in parallel to increase the energy storage capacity of the system.

7. The operating method of the pressure-type high-temperature thermochemical heat storage tank system according to claim 1, characterized in that: During energy storage, the high-temperature medium in the primary heat exchanger pipeline (7) in the reaction storage tank (1) transfers heat to the reaction material (9). When the temperature is higher than the reversible reaction equilibrium temperature, the reaction material (9) undergoes an endothermic dehydration reaction to generate high-temperature water vapor. The generated high-temperature water vapor enters the steam space of the pressure-suppressing tank (2) through the reaction steam pipeline (18). At the same time, the booster pump (4) sprays the relatively low-temperature liquid water in the water storage tank (3) through the cooling spray pipeline (21) and the sprayer (12) into the pressure-suppressing tank (2). The liquid water is mixed with the high-temperature water vapor in the pressure-suppressing tank (2) to reduce the temperature. The spray valve (16) is controlled to adjust the spray flow rate to stabilize the pressure of the pressure-suppressing tank (2). The water level of the pressure-suppressing tank (2) is adjusted through the drain pipeline (22) and the drain valve (15). The discharged water is cooled by the cooler (6) and then discharged into the water storage tank (3). When releasing energy, the medium in the secondary heat exchanger pipeline (8) in the reaction storage tank (1) absorbs heat from the bed of the reaction material (9). When the temperature is lower than the reversible reaction equilibrium temperature, the reaction material (9) undergoes a heat release hydration reaction, consuming water vapor. The water vapor is introduced from the steam space of the pressure regulating tank (2) through the reaction steam pipeline (18). At the same time, the booster pump (4) heats the liquid water in the water storage tank (3) into steam through the steam generation pipeline (20) by the steam generator (11). The steam generation flow is controlled by the steam generation valve (14) and injected into the pressure regulating tank (2) to stabilize the pressure and water level of the pressure regulating tank (2). When energy storage and energy release are carried out simultaneously, the heat exchange medium in the primary heat exchanger pipeline (7) and the secondary heat exchanger pipeline (8) in the reaction storage tank (1) flows and exchanges heat simultaneously, and the reaction direction of the reaction material (9) in the reaction storage tank (1) is determined by the temperature of the material. At this time, it is only necessary to control the spray flow rate of the pressure stabilizing tank (2) or the amount of steam injected into the pressure stabilizing tank (2) by the steam generator (11) to maintain the pressure in the pressure stabilizing tank (2), so as to ensure the normal operation of the energy storage and release process of the reaction storage tank (1); When the system is shut down or cold-started, it is necessary to start the vacuum pump (5), close the reaction steam valve (13), open the vacuum valve (17), and evacuate the system to a vacuum for long-term storage of reaction materials.

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