Cross-seasonal heat storage and release integrated system based on thermochemical heat storage material

Abstract

The invention discloses a cross-seasonal heat storage and release integrated system based on a thermochemical heat storage material. The cross-seasonal heat storage and release integrated system comprises a heat storage reaction material bin, a reactor, a heater, a solid product cooler, a heat storage solid product bin, a heat exchanger, an induced draft fan, a gas product storage tank, a valve, an air feeder, a controllable three-way valve, a dividing wall type heating surface and a separator. Compared with the prior art, the invention has the advantages of reasonable process, wide application range, large handling capacity, high system integration and high heat storage efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and in particular relates to a cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials. Background Art

[0002] Since the "dual carbon" goal was proposed, the efficient consumption of new energy and the effective reduction of fossil energy emissions have always been the key challenges to achieving this grand blueprint. In order to effectively solve this problem, actively tapping the waste heat resources of traditional high-energy-consuming industries and converting green electricity into thermal energy for storage through thermal energy storage technology are gradually showing their huge application potential and strategic value. This innovative energy conversion and storage method can not only improve energy utilization efficiency, but also help promote the optimization of energy structure and the green transformation of the industry, providing a practical path to achieve carbon peak and carbon neutrality goals.

[0003] According to the principle, thermal energy storage technology can be divided into three categories: sensible heat storage, latent heat storage (phase change storage) and thermochemical heat storage technology. Among them, thermochemical heat storage technology realizes the storage and release of thermal energy through reversible chemical reactions. Sensible heat and latent heat storage technology, thermochemical heat storage technology obtains high heat storage density reactants after heat storage. This eliminates the inevitable heat dissipation problem of sensible heat and latent heat storage during cross-season heat storage. The core of this technology is to utilize the thermal effect in chemical reactions to convert electrical energy or thermal energy into chemical energy for storage during the charging stage, and release heat energy through reverse reactions during the discharge stage to meet the diverse needs of heating, industrial steam, etc. This technology can not only realize the efficient conversion of energy, but also meet the energy storage needs across seasons and even across years, opening up new ways for the stable supply and efficient utilization of new energy.

[0004] However, the patents under the existing technology have the following disadvantages:

[0005] (1) It is unable to solve the problem that new energy cannot be connected to the grid and is wasted, and the problem of no thermal energy storage.

[0006] (2) It is impossible to avoid the large amount of heat loss caused by long-term storage using phase change heat storage and sensible heat storage.

[0007] (3) It is unable to solve the demand for inter-seasonal energy storage and the problem of low equipment utilization during inter-seasonal heat storage. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials with reasonable process, wide application range, large processing capacity, high system integration and high heat storage efficiency.

[0009] In order to solve the above problems, the technical solution of the present invention is: a cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials, comprising: a heat storage reaction material bin, a reactor, a heater, a solid product cooler, a heat storage solid product bin, a heat exchanger, an induced draft fan, a gas product storage tank, a valve, a blower, a controllable three-way valve, a partition-type heating surface and a separator;

[0010] The heat storage reaction material bin is used to store heat storage materials;

[0011] The reactor is connected to the heat storage reaction material bin, and the reactor can receive the heat storage material stored in the heat storage reaction material bin. A partition wall type heating surface is arranged inside the reactor;

[0012] The heater is connected to the reactor through a controllable three-way valve, and the controllable three-way valve is used to connect the reactor, the heater and the heat user. During the heat storage stage, the heater can convert green electricity into thermal energy. The thermal energy is sent into the reactor through the flowable working medium and transferred to the reactants through the partition-type heating surface in the reactor. The reactants are decomposed into solid products and gaseous products by heat.

[0013] The solid product cooler is connected to the reactor and is used to absorb the sensible heat of the high-temperature solid product generated by the thermal decomposition of the reactants;

[0014] The heat storage solid product silo is connected to the solid product cooler and the reactor. The heat storage solid product silo is used to store the solid product after sensible heat recovery during the heat storage stage, and is used to fill the reactants into the reactor during the heat release stage.

[0015] The heat exchanger is connected to the reactor through a separator, the separator removes high-temperature solid products and separates high-temperature gas products to be fed into the heat exchanger, and the heat exchanger is used to absorb the sensible heat of the high-temperature gas products separated by the separator;

[0016] The gas product storage tank is connected to the heat exchanger through an induced draft fan, and the gas product in the heat exchanger is introduced into the gas product storage tank through the induced draft fan and stored in the gas product storage tank. A valve is installed on one side of the gas product storage tank;

[0017] The blower is connected between the valve and the reactor, and is used to send the reaction medium in the gas product storage tank into the reactor during the heat release stage.

[0018] Furthermore, the heat storage material stored in the heat storage reaction material warehouse is a thermochemical heat storage material, which can realize cross-season heat storage;

[0019] For the metal oxide series in the heat storage material, the reactants in the heat storage stage are metal oxides, including but not limited to BaO 2 、Co3 O 4 , CuO, Mn 2 O 3 etc., solid products refer to BaO, CoO, Cu 2 O、Mn 3 O 4 etc., the gaseous product refers to oxygen (O 2 ), the heat release reaction is a reversible reaction of the heat storage reaction, and the solid reactants include but are not limited to BaO, CoO, Cu 2 O、Mn 3 O 4 etc., the solid product refers to BaO 2 、Co 3 O 4 , CuO, Mn 2 O 3 wait;

[0020] For the metal hydroxide series in the heat storage material, the reactants in the heat storage stage are metal hydroxides, including but not limited to Mg(OH) 2 , Ca(OH) 2 、Fe(OH) 2 etc. Solid products refer to MgO, CaO, Fe 2 O 3 etc., and the gaseous product refers to water vapor (H 2 O), can be stored in the form of liquid water after heat exchange, the heat release reaction is a reversible reaction of the heat storage reaction, and the solid reactants include but are not limited to MgO, CaO, Fe 2 O 3 et al., H. 2 O can be in the form of liquid water or water vapor. The solid product refers to Mg(OH) 2 , Ca(OH) 2 、Fe(OH) 2 wait;

[0021] For the carbonate series in the heat storage material, the reactants in the heat storage stage are carbonates, including but not limited to MgCO 3 、CaCO 3 、SrCO 3 etc. Solid products refer to MgO, CaO, SrO, etc. Gas products refer to carbon dioxide (CO 2 ), the heat release reaction is a reversible reaction of the heat storage reaction, the solid reactants include but are not limited to MgO, CaO, SrO, etc., and the solid product refers to MgCO 3 、CaCO 3 、SrCO 3 wait.

[0022] Furthermore, the reactor 2 can be used as a heat storage reactor or a heat release reactor, and the reactor form includes but is not limited to a fixed bed, a moving bed, a fluidized bed, etc.

[0023] Furthermore, the partition-type heat exchange surface provided in the reactor is used for the heat medium to transfer heat to the reactants during the heat storage stage, while avoiding mutual contamination between the reactants and the heat medium. The working medium in the partition-type heat exchange surface includes but is not limited to hot air, hot water, water vapor, CO 2 , thermal oil, etc.

[0024] The reactor is provided with an inlet and an outlet for the reaction medium, so as to facilitate the recovery and reuse of the product in the heat storage stage and the entry of the reaction medium and the recovery of the excess medium in the heat release stage.

[0025] Furthermore, when electric heating is used, the heating method includes but is not limited to electrode heating, resistance heating, electromagnetic heating, etc., and the heater includes but is not limited to electric thermal oil heater, electric air heater, etc.

[0026] Furthermore, the solid product cooler can be in the form of a drum cooler, a fluidized bed cooler, a grate cooler, etc.

[0027] Furthermore, the separator may be a membrane filter, a cyclone separator, a sedimentation chamber, etc.

[0028] Furthermore, the controllable three-way valve is disconnected from the heat user during the heat storage phase and is disconnected from the heater during the heat release phase.

[0029] Furthermore, when the reactant in the heat storage stage is metal hydroxide, the gas product is water vapor. At this time, the induced draft fan can be replaced by a water pump and the gas product storage tank can be replaced by a water tank. The latent heat and sensible heat of the water vapor are recovered by the heat exchanger and then sent to the water tank for storage through the water pump.

[0030] The advantages of the present invention compared with the prior art are:

[0031] (1) The electric heating scheme of this system uses electric heating (such as electric air heater or high-temperature thermal oil) to convert electrical energy into thermal energy of heat transfer medium to provide heat to thermochemical heat storage materials. It can also directly use industrial waste heat to promote thermal decomposition reaction of heat storage materials to realize the conversion of thermal energy into chemical energy. This system can improve the utilization rate of new energy power generation and solve the current problem that new energy cannot be connected to the grid and can only be wasted and there is no problem of thermal energy storage.

[0032] (2) The heat storage material is a medium-high temperature (reaction temperature greater than 300°C) thermochemical heat storage material. Since the energy is stored in the form of chemical energy, it can solve the problem of large amounts of heat loss generated by phase change heat storage and sensible heat storage during long-term storage. At the same time, the heat release temperature is high, which can provide high-quality heat.

[0033] (3) The present invention can solve the demand for cross-seasonal energy storage. The new system is an integrated heat storage and heat release system, and the reactor can meet the technical requirements of both heat storage reaction and heat release reaction. The new system can solve the problem of complicated traditional thermochemical heat storage system and low energy utilization rate. The new system has high equipment utilization rate and low investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a system schematic diagram of the heat storage process of a cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials of the present invention.

[0035] Figure 2 It is a system schematic diagram of the heat release process of a cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials of the present invention.

[0036] As shown in the figure: 1. Heat storage reaction material silo; 2. Reactor; 3. Heater; 4. Solid product cooler; 5. Heat storage solid product silo; 6. Heat exchanger; 7. Draft fan; 8. Gas product storage tank; 9. Valve; 10. Blower; 11. Controllable three-way valve; 12. Partition wall heating surface; 13. Separator. DETAILED DESCRIPTION

[0037] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] like Figure 1 to Figure 2As shown, a cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials includes: a heat storage reaction material bin 1, a reactor 2, a heater 3, a solid product cooler 4, a heat storage solid product bin 5, a heat exchanger 6, an induced draft fan 7, a gas product storage tank 8, a valve 9, a blower 10, a controllable three-way valve 11, a partition-type heating surface 12 and a separator 13.

[0041] The heat storage reaction material bin 1 is used to store heat storage materials. The heat storage materials stored in the heat storage reaction material bin 1 are thermochemical heat storage materials, which can realize cross-season heat storage;

[0042] For the metal oxide series in the heat storage material, the reactants in the heat storage stage are metal oxides, including but not limited to BaO 2 、Co 3 O 4 , CuO, Mn 2 O 3 etc., solid products refer to BaO, CoO, Cu 2 O、Mn 3 O 4 etc., the gaseous product refers to oxygen (O 2 ), the heat release reaction is a reversible reaction of the heat storage reaction, and the solid reactants include but are not limited to BaO, CoO, Cu 2 O、Mn 3 O 4 etc., the solid product refers to BaO 2 、Co 3 O 4 , CuO, Mn 2 O 3 wait;

[0043] For the metal hydroxide series in the heat storage material, the reactants in the heat storage stage are metal hydroxides, including but not limited to Mg(OH) 2 , Ca(OH) 2 、Fe(OH) 2 etc. Solid products refer to MgO, CaO, Fe 2 O 3 etc., and the gaseous product refers to water vapor (H 2 O), can be stored in the form of liquid water after heat exchange, the heat release reaction is a reversible reaction of the heat storage reaction, and the solid reactants include but are not limited to MgO, CaO, Fe 2 O 3 et al., H. 2 O can be in the form of liquid water or water vapor. The solid product refers to Mg(OH) 2 , Ca(OH) 2 、Fe(OH) 2 wait;

[0044] For the carbonate series in the heat storage material, the reactants in the heat storage stage are carbonates, including but not limited to MgCO 3 、CaCO 3 、SrCO 3 etc. Solid products refer to MgO, CaO, SrO, etc. Gas products refer to carbon dioxide (CO 2 ), the heat release reaction is a reversible reaction of the heat storage reaction, the solid reactants include but are not limited to MgO, CaO, SrO, etc., and the solid product refers to MgCO 3 、CaCO 3 、SrCO 3 wait.

[0045] The reactor 2 is docked with the heat storage reaction material warehouse 1. The reactor 2 can receive the heat storage material stored in the heat storage reaction material warehouse 1. A partition wall heating surface 12 is arranged inside the reactor 2. The partition wall heat exchange surface 12 arranged in the reactor 2 is used for the hot working medium to transfer heat to the reactants in the heat storage stage, while avoiding mutual contamination between the reactants and the hot working medium. The working medium in the partition wall heating surface 12 includes but is not limited to hot air, hot water, water vapor, CO2, heat transfer oil, etc. The reactor 2 can be used as a heat storage reactor or as a heat release reactor. The form of the reactor 2 includes but is not limited to a fixed bed, a moving bed, a fluidized bed, etc. The reactor 2 is also provided with an inlet and an outlet for the reaction working medium, which is convenient for the recovery and reuse of the products in the heat storage stage, and convenient for the entry of the reaction working medium and the recovery of the excess working medium in the heat release stage.

[0046] The heater 3 is connected to the reactor 2 through a controllable three-way valve 11. The controllable three-way valve 11 is used to connect the reactor 2, the heater 3 and the heat user. During the heat storage stage, the heater 3 can convert green electricity into thermal energy. The thermal energy is sent into the reactor 2 through the flowable working fluid and transferred to the reactants through the partition heating surface 12 in the reactor 2. The reactants are decomposed into solid products and gas products by heat. When using electric heating, the heater 3 includes but is not limited to electric thermal oil heaters, electric air heaters, etc. The controllable three-way valve 11 is disconnected from the heat user during the heat storage stage and disconnected from the heater 3 during the heat release stage.

[0047] The solid product cooler 4 is connected to the reactor 2. The solid product cooler 4 is used to absorb the sensible heat of the high-temperature solid products generated by the thermal decomposition of the reactants. The solid product cooler 4 can be in the form of a drum cooler, a fluidized bed cooler, a grate cooler, etc.

[0048] The heat storage solid product silo 5 is connected to the solid product cooler 4 and the reactor 2. The heat storage solid product silo 5 is used to store the solid product after sensible heat recovery during the heat storage stage, and the heat storage solid product silo 5 is used to fill the reactants into the reactor 2 during the heat release stage;

[0049] The heat exchanger 6 is connected to the reactor 2 through the separator 13. The separator 13 removes the high-temperature solid product and separates the high-temperature gas product to be sent to the heat exchanger 6. The heat exchanger 6 is used to absorb the sensible heat of the high-temperature gas product separated by the separator 13. The separator 13 can be a membrane filter, a cyclone separator, a sedimentation chamber, etc.

[0050] The gas product storage tank 8 is connected to the heat exchanger 6 through the induced draft fan 7. The gas product in the heat exchanger 6 is introduced into the gas product storage tank 8 through the induced draft fan 7 and stored in the gas product storage tank 8. A valve 9 is installed on one side of the gas product storage tank 8.

[0051] The blower 10 is connected between the valve 10 and the reactor 2 , and is used to deliver the reaction medium in the gas product storage tank 8 into the reactor 2 during the heat release stage.

[0052] When the reactant in the heat storage stage is metal hydroxide, the gas product is water vapor. At this time, the induced draft fan 7 can be replaced by a water pump and the gas product storage tank 8 can be replaced by a water tank. The latent heat and sensible heat of the water vapor are recovered by the heat exchanger 6 and then sent to the water tank for storage through the water pump.

[0053] Reference Figure 1 , the heat storage material is Ca(OH) 2 / CaO, the system is applied to the consumption of new energy and green electricity. In the heat storage stage, Ca(OH) 2 Fill into the moving reaction bed, the lower part of the moving reaction bed is equipped with a continuous discharge device, Ca(OH) 2 The air moves slowly downwards in the reactor due to gravity and eventually leaves the reactor. The air is then heated to 500-600°C by the electric air heater using green electricity and sent to the reactor 2, where it is heated by the partition heating surface 12 in the reactor. 2 , Ca(OH) 2 Decomposed into CaO and water vapor. At this time, the controllable three-way valve 11 cuts off the connection with the heat user, and the high-temperature air after heat exchange is reduced to 200-250°C and returns to the heater 3 to continue to be heated for recycling. The temperature of the reaction product CaO is between 300 and 400°C. In order not to waste this part of sensible heat, the drum cooler is used to cool CaO to below 150°C and finally stored in the heat storage solid product silo 5 as a reactant for the heat release reaction. Water vapor is discharged from the reserved outlet on the upper part of the mobile reaction bed. If powdered Ca(OH) 2 , a gas-solid separator, such as a cyclone separator, a settling chamber, etc., needs to be installed on the upper part of the moving bed. The discharged water vapor is separated from the excess CaO and Ca(OH) by the separator 13. 2 Then it enters the heat exchanger 6 to reduce the latent heat and sensible heat recovery temperature to below 50°C and is pumped into the water tank by a water pump. At this time, valve 9 is closed.

[0054] Reference Figure 2 In the heat release stage, first fill CaO into the reactor 2. Then open the valve 9, and the water pump 10 sprays liquid water into the reactor through multiple nozzles pre-arranged in the middle of the moving reaction bed. The liquid water reacts with CaO to release heat energy. At this time, the liquid water is heated to water vapor and discharged from the reserved outlet on the upper part of the moving reaction bed. The water vapor is separated from excess CaO and Ca(OH) by the separator 13. 2 After entering the heat exchanger 6, the latent heat and sensible heat recovery temperature is reduced to below 50°C, and then pumped into the water tank by the water pump for recycling. The heat exchanger 6 uses 20°C cold water to heat up to 40-50°C after heat exchange, and then continues to be sent to the drum cooler as a cooling medium. The heat energy is transferred to the water in the partition wall heating surface 12, and the water is heated from 40-50°C to 80-90°C and then transported to the heat user. At this time, the controllable three-way valve cuts off the connection with the electric heater. After the reaction, Ca(OH) is obtained 2 The temperature is between 400 and 500°C. In order not to waste this part of sensible heat, the CaO is cooled to below 100°C by the drum cooler 4 and finally stored in the heat storage reaction material bin 1 as a reactant for the heat storage reaction. The drum cooler uses 40-50°C cold water to heat it to 70-80°C after heat exchange and then enters the heat network to supply heat to heat users.

[0055] Embodiment 2:

[0056] Reference Figure 1 , the heat storage material is MgCO 3 / MgO, the system is used in a gas-steam combined cycle power generation system. In the heat storage stage, MgCO 3 Fill into the moving reaction bed, the lower part of which is equipped with a continuous discharge device, MgCO 3 The heat exchange medium in the heater 3 is then heated to 400-500°C by the 500-600°C hot flue gas generated by the combustion engine and sent to the reactor 2, where the MgCO is heated by the partition heating surface 12 in the reactor. 3 , MgCO 3 Decomposes into MgO and CO 2 At this time, the controllable three-way valve 11 cuts off the connection with the heat user, and the heat exchange medium after the reaction returns to the air heater to continue to be heated for recycling. The temperature of the reaction product MgO is between 300 and 400°C. In order not to waste this part of sensible heat, the drum cooler is used to cool MgO to below 150°C, and finally stored in the heat storage solid product silo 5 as a reactant for the heat release reaction. CO 2 It is discharged from the reserved outlet on the upper part of the moving reaction bed. A cyclone separator should be installed on the upper part of the moving bed to carry away the MgCO 3 Particle recovery. Exhaust CO 2The sensible heat recovery temperature is reduced to below 50°C after entering the heat exchanger 6, and then sent to the gas tank 8 by the induced draft fan 7. At this time, the valve 9 is in a closed state. The recovered heat is sent to nearby heat users. The heat exchanger 6 and the drum cooler can use the feed water of the generator set, which helps to improve the thermal efficiency of the power generation system. Other cooling water can also be used to send the recovered heat to nearby heat users.

[0057] Reference Figure 2 In the heat release stage, MgO is first filled into the reactor 2. Then the valve 9 is opened and the blower 10 blows CO 2 The CO is sprayed into the reactor through multiple nozzles pre-arranged in the middle of the moving reactor bed. 2 The reaction with MgO releases heat energy. CO2 is discharged from the reserved outlet on the upper part of the mobile reaction bed. The CO2 is separated from the excess MgO and MgCO by the separator 13. 3 After entering the heat exchanger 6, the latent heat and sensible heat recovery temperature is reduced to below 50°C, and then sent to the gas tank 8 by the induced draft fan 7 for recycling. The heat exchanger 6 uses the steam unit feed water as cooling water, which is heated to 30-40°C after heat exchange and continues to be sent to the drum cooler as a cooling medium. After being heated to 60-70°C in the drum cooler, it is sent to the partition wall heating surface 12 and finally returns to the heat recovery system of the steam unit. At this time, the controllable three-way valve cuts off the connection with the electric heater. After the reaction, MgCO 3 The temperature is between 400 and 500° C. In order not to waste this part of sensible heat, the MgO is cooled to below 100° C. using a drum cooler and finally stored in the heat storage reaction material bin 1 as a reactant for the heat storage reaction.

[0058] The electrical components appearing in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that controls a computer, etc. The specific implementation method of the present disclosure omits the detailed description of known functions and known components. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of marketed equipment.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials, characterized in that: include: A heat storage reaction material bin (1), a reactor (2), a heater (3), a solid product cooler (4), a heat storage solid product bin (5), a heat exchanger (6), an induced draft fan (7), a gas product storage tank (8), a valve (9), a blower (10), a controllable three-way valve (11), a partition-type heating surface (12) and a separator (13); The heat storage reaction material bin (1) is used to store heat storage materials; The reactor (2) is docked with the heat storage reaction material bin (1), the reactor (2) can receive the heat storage material stored in the heat storage reaction material bin (1), and a partition-type heating surface (12) is provided inside the reactor (2); The heater (3) is connected to the reactor (2) via a controllable three-way valve (11). The controllable three-way valve (11) is used to connect the reactor (2), the heater (3) and the heat user. During the heat storage stage, the heater (3) can convert green electricity into thermal energy. The thermal energy is sent into the reactor (2) via the flowable working medium and is transferred to the reactants via the partition-type heating surface (12) in the reactor (2). The reactants are decomposed into solid products and gaseous products by heat. The solid product cooler (4) is connected to the reactor (2), and the solid product cooler (4) is used to absorb the sensible heat of the high-temperature solid product generated by the thermal decomposition of the reactants; The heat storage solid product silo (5) is connected to the solid product cooler (4) and the reactor (2). The heat storage solid product silo (5) is used to store the solid product after sensible heat recovery during the heat storage stage, and the heat storage solid product silo (5) is used to fill the reactants into the reactor (2) during the heat release stage. The heat exchanger (6) is connected to the reactor (2) via a separator (13). The separator (13) removes high-temperature solid products and separates high-temperature gas products to be fed into the heat exchanger (6). The heat exchanger (6) is used to absorb the sensible heat of the high-temperature gas products separated by the separator (13). The gas product storage tank (8) is connected to the heat exchanger (6) via an induced draft fan (7), and the gas product in the heat exchanger (6) is introduced into the gas product storage tank (8) via the induced draft fan (7) and stored in the gas product storage tank (8), and a valve (9) is installed on one side of the gas product storage tank (8); The blower (10) is connected between the valve (10) and the reactor (2). The blower (10) is used to deliver the reaction medium in the gas product storage tank (8) into the reactor (2) during the heat release stage.

2. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1 is characterized by: The heat storage material stored in the heat storage reaction material bin (1) is a thermochemical heat storage material, which can realize cross-season heat storage; For the metal oxide series in the heat storage material, the reactants in the heat storage stage are metal oxides, including but not limited to BaO2, Co3O4, CuO, Mn2O3, etc., the solid products refer to BaO, CoO, Cu2O, Mn3O4, etc., the gas product refers to oxygen (O2), the heat release reaction is a reversible reaction of the heat storage reaction, the solid reactants include but not limited to BaO, CoO, Cu2O, Mn3O4, etc., and the solid products refer to BaO2, Co3O4, CuO, Mn2O3, etc.; For the metal hydroxide series in the heat storage material, the reactants in the heat storage stage are metal hydroxides, including but not limited to Mg(OH)2, Ca(OH)2, Fe(OH)2, etc., the solid products refer to MgO, CaO, Fe2O3, etc., the gaseous products refer to water vapor (H2O), which can be stored in the form of liquid water after heat exchange, the heat release reaction is a reversible reaction of the heat storage reaction, the solid reactants include but not limited to MgO, CaO, Fe2O3, etc., H2O can be in the form of liquid water or water vapor, and the solid products refer to Mg(OH)2, Ca(OH)2, Fe(OH)2, etc.; For the carbonate series in heat storage materials, the reactants in the heat storage stage are carbonates, including but not limited to MgCO3, CaCO3, SrCO3, etc., the solid products refer to MgO, CaO, SrO, etc., the gas product refers to carbon dioxide (CO2), the heat release reaction is a reversible reaction of the heat storage reaction, the solid reactants include but not limited to MgO, CaO, SrO, etc., and the solid products refer to MgCO3, CaCO3, SrCO3, etc.

3. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1 is characterized by: The reactor (2) can be used as a heat storage reactor or a heat release reactor. The reactor (2) may be in the form of, but not limited to, a fixed bed, a moving bed, a fluidized bed, etc.

4. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1 is characterized in that: The partition-type heat exchange surface (12) provided in the reactor (2) is used for the heat medium to transfer heat to the reactants during the heat storage stage, while avoiding mutual contamination between the reactants and the heat medium. The medium in the partition-type heat exchange surface (12) includes but is not limited to hot air, hot water, water vapor, CO2, heat transfer oil, etc.; The reactor (2) is provided with an inlet and an outlet for the reaction medium, so as to facilitate the recovery and reuse of the product in the heat storage stage and to facilitate the entry of the reaction medium and the recovery of excess medium in the heat release stage.

5. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1, characterized in that: When electric heating is used, the heating method includes but is not limited to electrode heating, resistance heating, electromagnetic heating, etc., and the heater (3) includes but is not limited to electric thermal oil heater, electric air heater, etc.

6. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1 is characterized by: The solid product cooler (4) can be in the form of a drum cooler, a fluidized bed cooler, a grate cooler, etc.

7. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1 is characterized by: The separator (13) may be a membrane filter, a cyclone separator, a sedimentation chamber, etc.

8. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1 is characterized by: The controllable three-way valve (11) is disconnected from the heat user during the heat storage phase and is disconnected from the heater (3) during the heat release phase.

9. The cross-seasonal integrated heat storage and release system based on thermochemical heat storage materials according to claim 1, characterized in that: When the reactant in the heat storage stage is a metal hydroxide, the gas product is water vapor. In this case, the induced draft fan (7) can be replaced by a water pump and the gas product storage tank (8) can be replaced by a water tank. The latent heat and sensible heat of the water vapor are recovered by the heat exchanger (6) and then pumped into the water tank for storage.

Images