Horizontal efficient heat storage and heat release integrated device and process

Abstract

The invention discloses a horizontal efficient heat storage and heat release integrated device and process. Comprising a heat storage reaction material bin, a material preheater, a horizontal fluidized bed reactor, a solid product cooler, a heat storage solid product bin, a cyclone separator, a gas selective separation membrane, a gas heat exchanger, an induced draft fan, a gas product storage tank, a heat release valve, an air feeder and a heat storage valve. Compared with the prior art, the method has the advantages that the process is reasonable, the application range is wide, the handling capacity is large, the system integration degree is high, abrasion and pulverization of the heat storage material are reduced, and the heat efficiency of the reactor and the total heat efficiency of the system are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and in particular relates to a horizontal high-efficiency integrated heat storage and release device and process. Background Art

[0002] Thermal energy storage technology can be divided into three categories according to the principle: 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 and store it 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.

[0003] The premise of using thermochemical heat storage technology is to select suitable heat storage materials according to the reaction system. At present, typical heat storage material systems include metal oxides, carbonates, metal hydroxides, metal hydrides, amino groups, methane reforming and other systems. However, in view of the significant differences in reaction conditions, physical state of materials and product characteristics among various reaction systems, current technology cannot provide a universal reactor to fully meet the heat storage and exothermic reaction requirements of all heat storage materials. Therefore, in order to promote more efficient and wider application of thermochemical heat storage technology, the design and optimization of reactors are key technical problems that need to be overcome.

[0004] Patent No. CN2019201275902 in the prior art discloses a thermochemical heat storage system using a fluidization process. The system utilizes a method of fluidizing solid-phase reactants with gas-phase reactants or heated gas media to allow thermochemical reactions to occur during the fluidization of the reactants. The heat storage process and the heat release process share a fluidized bed reactor. The corresponding system includes equipment such as a fluidized bed reactor, a cyclone separator, a reaction material hopper, and a generated material hopper.

[0005] However, the patents under the existing technology have the following disadvantages:

[0006] (1) The movement of materials in the reactor is disordered and fast, and sufficient reaction time can only be guaranteed by multiple cycles. However, higher fluidization wind speeds intensify the collisions between thermochemical heat storage materials, causing unnecessary wear and pulverization of the materials, especially the carbonate system, and affecting the number of times the materials can be used.

[0007] (2) The reactor has only water-cooled walls as the heating surface, and lacks the arrangement of heating surfaces in the furnace, which seriously affects the heat exchange efficiency of the reactor. The system lacks the recovery of sensible heat of solid materials, which also reduces the thermal efficiency of the system.

[0008] (3) The system uses air for heating. For carbonate and metal oxide systems, there is a lack of technology to separate the decomposed gas products from the air, which seriously affects the system's use effect and economy of carbonate and metal oxide system materials.

[0009] (4) 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

[0010] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a horizontal high-efficiency heat storage and heat release integrated device and process with reasonable process, wide application range, large processing capacity and high system integration.

[0011] In order to solve the above problems, the technical solution of the present invention is: a horizontal high-efficiency heat storage and heat release integrated device, comprising: a heat storage reaction material bin, a material preheater, a horizontal fluidized bed reactor, a solid product cooler, a heat storage solid product bin, a cyclone separator, a gas selective separation membrane, a gas heat exchanger, an induced draft fan, a gas product storage tank, a heat release valve, a blower and a heat storage valve;

[0012] The heat storage reaction material warehouse is used to store reactants:

[0013] The material preheater is connected to the heat storage reaction material bin, and the material preheater is used to receive the reactants in the heat storage reaction material bin and preheat them;

[0014] The horizontal fluidized bed reactor is connected to the material preheater, and is used to receive reactants for reaction. The horizontal fluidized bed reactor includes a feed port, an emergency discharge port, a heat storage heat exchange surface, a partition wall, a wind chamber, a waste heat recovery heat exchange surface and a gas outlet;

[0015] The solid product cooler is connected to the horizontal fluidized bed reactor, and is used to receive high-temperature solid products generated by thermal decomposition of reactants in the horizontal fluidized bed reactor and absorb sensible heat of the high-temperature solid products;

[0016] The heat storage solid product silo is connected to the solid product cooler and the material preheater. 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 horizontal fluidized bed reactor through the material preheater during the heat release stage.

[0017] The gas heat exchanger is connected to the horizontal fluidized bed reactor through a cyclone separator and a gas selective separation membrane. The cyclone separator can separate and remove solid products. The gas selective separation membrane can separate gas products and recycle them into the gas heat exchanger. The gas heat exchanger is used to absorb sensible heat in the gas products.

[0018] The gas product storage tank is connected to the gas heat exchanger through an induced draft fan, and the induced draft fan sends the gas product discharged from the gas heat exchanger into the gas product storage tank for storage. The heat release valve is installed on one side of the gas product storage tank;

[0019] The blower is connected between the heat release valve of the horizontal fluidized bed reactor and the gas product storage tank, and the blower sends the reaction medium in the gas product storage tank into the horizontal fluidized bed reactor during the heat release stage;

[0020] The heat storage valve is installed on one side of the cyclone separator. During the heat storage stage, the heat storage valve is used to discharge excess air to the outside or return excess air to the designed cycle.

[0021] Furthermore, the feed port is fixedly connected to one side of the horizontal fluidized bed reactor through a pipeline;

[0022] The emergency discharge port is fixedly connected to the bottom end of the pipe of the feed port through a pipe;

[0023] The heat storage and heat exchange surface is fixedly connected to the middle of the inner side of the horizontal fluidized bed reactor, and the heat storage and heat exchange surface faces the pipeline of the feed port;

[0024] The partition wall is fixedly connected to the middle part of the inner side of the horizontal fluidized bed reactor, and a directional wind cap is installed between the partition walls;

[0025] The wind chamber is arranged at the bottom of the inner side of the horizontal fluidized bed reactor, a fluidizing hood is installed at the top of the wind chamber, and a pipeline with a discharge port is fixedly connected to the bottom of the wind chamber;

[0026] The waste heat recovery heat exchange surface is arranged at the top of the inner side of the horizontal fluidized bed reactor;

[0027] The gas outlet is fixedly connected to the top of the horizontal fluidized bed reactor through a pipeline.

[0028] Furthermore, the horizontal fluidized bed reactor is used as both a heat storage reactor and a heat release reactor;

[0029] The fluidization state in the horizontal fluidized bed reactor is suspension or boiling, not high-speed fluidization. Under rated working conditions, the wind speed of the hood orifice is generally selected to be 20-50 m / s, the fluidization wind speed is in the range of 0.5-2.0 m / s, and when the reference temperature is 20°C, the fluidization air distribution structure consists of an air distribution plate, a wind chamber and a co-fluidization air hood, which mainly puts the material in a suspended or boiling fluidized state;

[0030] The flow in the horizontal fluidized bed reactor mainly depends on the directional air distribution structure; the movement speed and fluidization degree of the material in the reactor can be controlled by adjusting the air volume and valve opening of different wind chambers, thereby controlling the reaction rate and the reaction amount of the material. The directional air distribution structure consists of an air distribution plate, a wind chamber, a coaxial directional wind hood and a vertical axis directional wind hood, which mainly makes the material run along the designed direction to play a role of pneumatic conveying.

[0031] Furthermore, the reactants stored in the heat storage reaction material bin are thermochemical heat storage materials;

[0032] 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.;

[0033] 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.;

[0034] 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.

[0035] Furthermore, the solid product cooler is connected to the heat storage reaction material bin in the heat release stage. When the reactant in the heat storage stage is a 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 gas heat exchanger and then sent to the water tank for storage through the water pump.

[0036] Furthermore, the solid product cooler 4 can be in the form of a drum cooler, a fluidized bed cooler, a grate cooler, etc.

[0037] The present invention also provides a process technology of a horizontal high-efficiency heat storage and heat release integrated process device, comprising the following steps:

[0038] S1: In the heat storage stage, the reactants are first sent from the heat storage reaction material bin to the horizontal fluidized bed reactor from the material preheater, and the materials enter the horizontal fluidized bed reactor from the feed port. At this time, the accident discharge port is closed, and the high-temperature exothermic working fluid reacts and passes through the heat storage heat exchange surface before entering the wind chamber. The gaseous products produced in the heat storage stage leave the horizontal fluidized bed reactor together with the exothermic working fluid from the gas outlet. The waste heat recovery heat exchange surface recovers the sensible heat of the fluidized working fluid and gaseous products in the heat storage and heat release stages, and sends the heat energy to the material preheater, which plays a role in preheating the materials before entering the horizontal fluidized bed reactor;

[0039] S2: High-temperature air or industrial waste heat enters the horizontal fluidized bed reactor through the wind chamber, directly contacts the reactants and transfers heat energy to the reactants. The reactants are decomposed into solid products and gaseous products by heat. The high-temperature solid products recover sensible heat through the solid product cooler and are finally stored in the heat storage solid product silo.

[0040] S3: After the gaseous product and the fluidizing medium pass through the cyclone separator, the gaseous product is recovered by the gas selective separation membrane, and the exothermic medium is discharged according to the requirements of the original system or returned to the designed cycle. At this time, the heat storage valve is in the open state. The separated gaseous product enters the gas heat exchanger to recover the sensible heat, and then is sent to the gas product storage tank by the induced draft fan. At this time, the heat release valve is closed;

[0041] S4: In the heat release stage, the reactants are first fed into the reactor from the heat storage solid product silo through the material preheater, and the reaction medium is sent into the horizontal fluidized bed reactor by the blower. The heat release medium passes through the wind chamber and directly contacts the material through the directional wind cap and the fluidizing wind cap, and not only participates in the reaction, but also participates in the fluidization;

[0042] S5: The reactants and the reaction medium release heat energy. The excess reaction medium is separated from the solid materials by the cyclone separator and then passes through the gas selective separation membrane. It then enters the gas heat exchanger to recover the sensible heat and is then sent back to the gas product storage tank by the induced draft fan.

[0043] S6: The heat energy is transferred to the heat user through the waste heat recovery heat exchange surface arranged in the horizontal fluidized bed reactor to absorb the heat. At this time, the heat release valve is opened, the heat storage valve is closed, and the high-temperature solid product recovers the sensible heat through the solid product cooler, and is finally stored in the heat storage reaction material bin as the next heat storage reactant.

[0044] The advantages of the present invention compared with the prior art are:

[0045] (1) The new equipment proposed in the present invention adopts low wind speed fluidization technology to solve the problem of wear and pulverization of heat storage materials caused by high fluidization wind speed in vertical fluidized beds.

[0046] (2) The new equipment proposed in the present invention is internally provided with a heating surface, which can recover the sensible heat of the fluidized medium and improve the thermal efficiency of the reactor. The new process proposed in the present invention solves the technical problem that the sensible heat of the thermochemical heat storage technology cannot be recovered, and effectively improves the overall thermal efficiency of the system.

[0047] (3) The new equipment proposed in the present invention solves the problem of separation of the fluidizing medium and the gas product when the fluidizing medium directly heats the heat storage material.

[0048] (4) The present invention can meet the needs of cross-seasonal energy storage. The new system is an integrated process of heat storage and heat release, and the reactor can meet the technical requirements of both heat storage reaction and heat release reaction. The new system can solve the problems of the traditional thermochemical heat storage system being complicated and having low energy utilization rate. The new system has high equipment utilization rate and low investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 Schematic diagram of the heat storage system.

[0050] Figure 2 Schematic diagram of the system for the exothermic process.

[0051] Figure 3 It is a schematic diagram of the structure of reactor 3.

[0052] Figure 4 for Figure 3 AA cross-section diagram.

[0053] As shown in the figure: 1. Heat storage reaction material silo; 2. Material preheater; 3. Horizontal fluidized bed reactor; 301. Feed port; 302. Accident discharge port; 303. Heat storage heat exchange surface; 304. Directional wind hood; 305. Partition wall; 306. Fluidized wind hood; 307. Wind chamber; 308. Discharge port; 309. Waste heat recovery heat exchange surface; 310. Gas outlet; 4. Solid product cooler; 5. Heat storage solid product silo; 6. Cyclone separator; 7. Gas selective separation membrane; 8. Gas heat exchanger; 9. Draft fan; 10. Gas product storage tank; 11. Heat release valve; 12. Blower; 13. Heat storage valve. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] Embodiment 1:

[0057] like Figures 1 to 4 As shown, a horizontal high-efficiency heat storage and heat release integrated device includes: a heat storage reaction material bin 1, a material preheater 2, a horizontal fluidized bed reactor 3, a solid product cooler 4, a heat storage solid product bin 5, a cyclone separator 6, a gas selective separation membrane 7, a gas heat exchanger 8, an induced draft fan 9, a gas product storage tank 10, a heat release valve 11, a blower 12 and a heat storage valve 13.

[0058] The heat storage reaction material bin 1 is used to store reactants. The reactants stored in the heat storage reaction material bin 1 are thermochemical heat storage materials. For the metal oxide series in the heat storage materials, 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 are not limited to BaO, CoO, Cu2O, Mn3O4, etc., and the solid products refer to BaO2, Co3O4, CuO, Mn2O3, etc.;

[0059] 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.;

[0060] 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.

[0061] The material preheater 2 is connected to the heat storage reaction material bin 1, and the material preheater 2 is used to receive the reactants in the heat storage reaction material bin 1 and preheat them;

[0062] The horizontal ebullating bed reactor 3 is connected to the material preheater 2. The horizontal ebullating bed reactor 3 serves as a heat storage reactor and a heat release reactor. The horizontal ebullating bed reactor 3 is used to receive reactants for reaction.

[0063] The solid product cooler 4 is connected to the horizontal fluidized bed reactor 3. The solid product cooler 4 is used to receive the high-temperature solid products generated by the thermal decomposition of the reactants in the horizontal fluidized bed reactor 3 and absorb the sensible heat of the high-temperature solid products. The solid product cooler 4 can be in the form of a drum cooler, a fluidized bed cooler, a grate cooler, etc. The solid product cooler 4 is connected to the heat storage reaction material bin 1 in the heat release stage. When the reactant in the heat storage stage is a metal hydroxide, the gas product is water vapor. At this time, the induced draft fan 9 can be replaced by a water pump and the gas product storage tank 10 can be replaced by a water tank. The latent heat and sensible heat of the water vapor are recovered by the gas heat exchanger 8 and then sent to the water tank for storage through the water pump.

[0064] The heat storage solid product silo 5 is connected to the solid product cooler 4 and the material preheater 2. The heat storage solid product silo 5 is used to store the solid product after sensible heat recovery during the heat storage stage. The heat storage solid product silo 5 is used to fill the reactants into the horizontal fluidized bed reactor 3 through the material preheater 2 during the heat release stage.

[0065] The gas heat exchanger 8 is connected to the horizontal fluidized bed reactor 3 through the cyclone separator 6 and the gas selective separation membrane 7. The cyclone separator 6 can separate and remove the solid product, and the gas selective separation membrane 7 can separate the gas product and recycle it into the gas heat exchanger 8. The gas heat exchanger 8 is used to absorb the sensible heat in the gas product.

[0066] The gas product storage tank 10 is connected to the gas heat exchanger 8 through the induced draft fan 9. The induced draft fan 9 sends the gas product discharged from the gas heat exchanger 8 into the gas product storage tank 10 for storage. The heat release valve 11 is installed on one side of the gas product storage tank 10.

[0067] The blower 12 is connected between the horizontal fluidized bed reactor 3 and the heat release valve 11 of the gas product storage tank 10. The blower 12 delivers the reaction medium in the gas product storage tank 10 into the horizontal fluidized bed reactor 3 during the heat release stage.

[0068] The heat storage valve 13 is installed on one side of the cyclone separator 6. The heat storage valve 13 is used to discharge excess air to the outside or return excess air to the designed cycle during the heat storage stage.

[0069] The horizontal fluidized bed reactor 3 includes a feed port 301, an emergency discharge port 302, a heat storage heat exchange surface 303, a partition wall 305, a wind chamber 307, a waste heat recovery heat exchange surface 309 and a gas outlet 310; the feed port 301 is fixedly connected to one side of the horizontal fluidized bed reactor 3 through a pipeline, the emergency discharge port 302 is fixedly connected to the bottom end of the feed port 301 through a pipeline, the heat storage heat exchange surface 303 is fixedly connected to the middle of the inner side of the horizontal fluidized bed reactor 3, and the heat storage heat exchange surface 303 is directly opposite to the feed port 301. 1, a partition wall 305 is fixedly connected to the middle of the inner side of the horizontal fluidized bed reactor 3, a directional wind cap 304 is installed between the partition walls 305, a wind chamber 307 is arranged at the inner bottom of the horizontal fluidized bed reactor 3, a fluidizing wind cap 306 is installed on the top of the wind chamber 307, a pipeline with a discharge port 308 is fixedly connected to the bottom of the wind chamber 307, a waste heat recovery heat exchange surface 309 is arranged at the inner top of the horizontal fluidized bed reactor 3, and a gas outlet 310 is fixedly connected to the top of the horizontal fluidized bed reactor 3 through a pipeline.

[0070] The fluidization state in the horizontal fluidized bed reactor 3 is suspension or boiling, not high-speed fluidization. Under rated conditions, the wind speed of the hood orifice is generally selected to be 20-50 m / s, the fluidization wind speed is in the range of 0.5-2.0 m / s, and when the reference temperature is 20°C, the fluidization air distribution structure consists of an air distribution plate, a wind chamber and a co-fluidization air hood, which mainly makes the material in a suspended or boiling fluidized state;

[0071] The flow in the horizontal fluidized bed reactor 3 mainly depends on the directional air distribution structure; the movement speed and fluidization degree of the material in the reactor can be controlled by adjusting the air volume and valve opening of different air chambers, thereby controlling the reaction rate and the reaction amount of the material. The directional air distribution structure consists of an air distribution plate, an air chamber, a coaxial directional air hood and a vertical axis directional air hood, which mainly makes the material run along the designed direction and plays a role in pneumatic conveying.

[0072] A process technology of a horizontal high-efficiency heat storage and heat release integrated process device comprises the following steps:

[0073] S1: In the heat storage stage, the heat storage reaction material bin 1 first feeds the reactants from the material preheater 2 into the horizontal fluidized bed reactor 3, and the materials enter the horizontal fluidized bed reactor 3 from the feed port 301. At this time, the accident discharge port 302 is closed, and the high-temperature exothermic working fluid reacts and passes through the heat storage heat exchange surface 303 before entering the wind chamber 307. The gaseous products produced in the heat storage stage leave the horizontal fluidized bed reactor 3 together with the exothermic working fluid from the gas outlet 310. The waste heat recovery heat exchange surface 309 recovers the sensible heat of the fluidized working fluid and gaseous products in the heat storage and heat release stages, and sends the heat energy to the material preheater 2, which plays a role in preheating the materials before entering the horizontal fluidized bed reactor 3;

[0074] S2: High-temperature air or industrial waste heat enters the horizontal fluidized bed reactor 3 through the wind chamber 307, directly contacts the reactants and transfers heat energy to the reactants. The reactants are decomposed into solid products and gaseous products by heat. The high-temperature solid products recover sensible heat through the solid product cooler 4 and are finally stored in the heat storage solid product silo 5;

[0075] S3: After the gaseous product and the fluidizing medium pass through the cyclone separator 6, the gaseous product is recovered by the gas selective separation membrane 7, and the exothermic medium is discharged according to the requirements of the original system or returned to the designed cycle. At this time, the heat storage valve 13 is in the open state. The separated gaseous product enters the gas heat exchanger 8 to recover the sensible heat, and then is sent to the gas product storage tank 10 by the induced draft fan 9. At this time, the heat release valve 11 is closed;

[0076] S4: In the heat release stage, the reactants are first filled into the reactor 3 through the material preheater 2 from the heat storage solid product silo 5, and the reaction medium is sent into the horizontal fluidized bed reactor 3 by the blower 12. The heat release medium passes through the wind chamber 307 and directly contacts the materials through the directional wind hood 304 and the fluidizing wind hood 306, and not only participates in the reaction, but also participates in the fluidization.

[0077] S5: The reactants react with the reaction medium to release heat energy. The excess reaction medium is separated from the solid material by the cyclone separator 6 and then passes through the gas selective separation membrane 7. It then enters the gas heat exchanger 8 to recover the sensible heat and is then sent back to the gas product storage tank 10 by the induced draft fan 9.

[0078] S6: The heat energy is transferred to the heat user through the waste heat recovery heat exchange surface 309 arranged in the horizontal fluidized bed reactor 3 to absorb the heat. At this time, the heat release valve 11 is opened, the heat storage valve 13 is closed, and the high-temperature solid product recovers the sensible heat through the solid product cooler 4, and is finally stored in the heat storage reaction material bin 1 as the next heat storage reactant.

[0079] Embodiment 2:

[0080] The solution in Example 1 is further introduced below in combination with a specific working method, as described below:

[0081] Reference Figure 1 , the heat storage material is MgCO3 / MgO, and the system is applied to the consumption scenario of new energy green electricity. In the heat storage stage, the reaction material bin 1 first sends MgCO3 from the material preheater 2 to the horizontal fluidized bed reactor 3. Then the electric air heater sends high-temperature air (400-500°C) into the horizontal fluidized bed reactor 3 through the wind chamber 307 to directly heat MgCO3, which is decomposed into MgO and CO2 by heat. Thermal energy is stored in the form of chemical energy. 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 bin 5 as a reactant for the heat release reaction. After CO2 passes through the cyclone separator 6 together with the air, the gas selective separation membrane 7 is used to recover CO2, and the air is discharged according to the requirements of the original system or returned to the design cycle. At this time, the valve 13 is in the open state. The separated CO2 enters the gas heat exchanger 8 to reduce the temperature to below 50°C, and is then sent to the gas product storage tank 10 by the induced draft fan 9. At this time, the heat release valve 11 is closed. The recovered heat is sent to nearby heat users. The gas heat exchanger 8 and the drum cooler can send the recovered heat to nearby heat users.

[0082] Reference Figure 2 In the heat release stage, MgO is first fed into the horizontal fluidized bed reactor 3 through the material preheater 2 from the heat storage solid product silo 5. CO2 is fed into the horizontal fluidized bed reactor 3 by the blower 12. MgO reacts with CO2 to release heat energy. The excess CO2 is separated from the solid material by the separator 6 and then passes through the gas selective separation membrane 7. It enters the gas heat exchanger 8 to recover the sensible heat and is then sent back to the gas product storage tank 10 by the induced draft fan 9. It can continue to be fed into the reactor as a reaction medium. The heat energy is absorbed by the heat exchange surface set in the reactor and then transferred to the heat user. At this time, the heat release valve 11 is opened and the heat storage valve 13 is closed. The temperature of MgCO3 obtained after the reaction is between 400 and 500°C. In order not to waste this part of the sensible heat, the drum cooler is used to cool MgO to below 100°C and finally stored in the heat storage reaction material silo 1 as a reactant for the heat storage reaction.

[0083] Embodiment 3:

[0084] The solution in Example 1 is further introduced below in combination with a specific working method, as described below:

[0085] Reference Figure 1, the heat storage material is BaO2 / BaO, and the system is used in a gas-steam combined cycle power generation system. In the heat storage stage, BaO2 is first sent from the material preheater 2 to the horizontal fluidized bed reactor 3. Then the 500-600°C hot flue gas generated by the gas turbine is sent to the horizontal fluidized bed reactor 3 to directly heat BaO2, and BaO2 is decomposed into BaO and O2. Thermal energy is stored in the form of chemical energy, and the temperature of the reaction product BaO is between 400 and 500°C. In order not to waste this part of sensible heat, the drum cooler is used to cool BaO to below 150°C, and finally stored in the heat storage solid product silo 5 as a reactant for the heat release reaction. After O2 passes through the cyclone separator 6 together with the exhaust gas from the gas turbine, O2 is recovered by the gas selective separation membrane 7, and the flue gas returns to the design cycle according to the requirements of the original system. At this time, the heat storage valve 13 is in an open state. The separated O2 enters the heat exchanger 8 to reduce the temperature to below 50°C, and is then sent to the gas product storage tank 10 by the induced draft fan 9. At this time, the heat release valve 11 is closed. The recovered heat is sent to nearby heat users. The gas heat exchanger 8 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.

[0086] Reference Figure 2 In the heat release stage, the material bin 5 first fills BaO into the horizontal fluidized bed reactor 3 through the material preheater 2. O2 is sent into the horizontal fluidized bed reactor 3 by the blower 12. BaO reacts with O2 to release heat energy. The excess O2 is separated from the solid material by the separator 6 and then passes through the gas selective separation membrane 7. It enters the heat exchanger 8 to recover the sensible heat and is sent back to the gas product storage tank 10 by the induced draft fan 9. It can continue to be sent to the reactor as a reaction medium. The heat energy is absorbed by the heat exchange surface set in the reactor and then transferred to the heat user. At this time, the heat release valve 11 is opened and the heat storage valve 13 is closed. The temperature of BaO2 obtained after the reaction is between 400 and 500°C. In order not to waste this part of the sensible heat, the drum cooler is used to cool the BaO2 to below 100°C and finally stored in the heat storage reaction material bin 1 as a reactant for the heat storage reaction.

[0087] 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.

[0088] 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 horizontal high-efficiency integrated heat storage and heat release device, characterized in that: include: A heat storage reaction material bin (1), a material preheater (2), a horizontal fluidized bed reactor (3), a solid product cooler (4), a heat storage solid product bin (5), a cyclone separator (6), a gas selective separation membrane (7), a gas heat exchanger (8), an induced draft fan (9), a gas product storage tank (10), a heat release valve (11), a blower (12) and a heat storage valve (13); The heat storage reaction material bin (1) is used to store reactants: The material preheater (2) is connected to the heat storage reaction material bin (1), and the material preheater (2) is used to receive the reactants in the heat storage reaction material bin (1) and preheat them; The horizontal ebullating bed reactor (3) is connected to the material preheater (2), and the horizontal ebullating bed reactor (3) is used to receive reactants for reaction. The horizontal ebullating bed reactor (3) comprises a feed port (301), an emergency discharge port (302), a heat storage heat exchange surface (303), a partition wall (305), a wind chamber (307), a waste heat recovery heat exchange surface (309), and a gas outlet (310); The solid product cooler (4) is connected to the horizontal ebullating bed reactor (3), and the solid product cooler (4) is used to receive high-temperature solid products generated by thermal decomposition of reactants in the horizontal ebullating bed reactor (3) and absorb sensible heat of the high-temperature solid products; The heat storage solid product silo (5) is connected to the solid product cooler (4) and the material preheater (2). The heat storage solid product silo (5) is used to store the solid product after sensible heat recovery during the heat storage stage. The heat storage solid product silo (5) is used to feed the reactants into the horizontal fluidized bed reactor (3) through the material preheater (2) during the heat release stage. The gas heat exchanger (8) is connected to the horizontal fluidized bed reactor (3) via a cyclone separator (6) and a gas selective separation membrane (7). The cyclone separator (6) can separate and remove solid products. The gas selective separation membrane (7) can separate gas products and recover them and send them to the gas heat exchanger (8). The gas heat exchanger (8) is used to absorb sensible heat in the gas products. The gas product storage tank (10) is connected to the gas heat exchanger (8) via an induced draft fan (9), and the induced draft fan (9) delivers the gas product discharged from the gas heat exchanger (8) into the gas product storage tank (10) for storage, and the heat release valve (11) is installed on one side of the gas product storage tank (10); The blower (12) is connected between the horizontal fluidized bed reactor (3) and the heat release valve (11) of the gas product storage tank (10), and the blower (12) sends the reaction medium in the gas product storage tank (10) into the horizontal fluidized bed reactor (3) during the heat release stage; The heat storage valve (13) is installed on one side of the cyclone separator (6). During the heat storage stage, the heat storage valve (13) is used to discharge excess air to the outside or to return excess air to the designed cycle.

2. A horizontal high-efficiency integrated heat storage and release device according to claim 1, characterized in that: The feed port (301) is fixedly connected to one side of the horizontal fluidized bed reactor (3) through a pipeline; The emergency discharge port (302) is fixedly connected to the bottom end of the pipe of the feed port (301) through a pipe; The heat storage and heat exchange surface (303) is fixedly connected to the middle part of the inner side of the horizontal fluidized bed reactor (3), and the heat storage and heat exchange surface (303) is directly opposite to the pipeline of the feed port (301); The partition wall (305) is fixedly connected to the middle part of the inner side of the horizontal fluidized bed reactor (3), and a directional wind cap (304) is installed between the partition walls (305); The wind chamber (307) is arranged at the inner bottom of the horizontal fluidized bed reactor (3), a fluidizing air cap (306) is installed at the top of the wind chamber (307), and a pipeline with a discharge port (308) is fixedly connected to the bottom of the wind chamber (307); The waste heat recovery heat exchange surface (309) is arranged at the top of the inner side of the horizontal fluidized bed reactor (3); The gas outlet (310) is fixedly connected to the top of the horizontal fluidized bed reactor (3) through a pipeline.

3. A horizontal high-efficiency integrated heat storage and heat release device according to claim 1, characterized in that: The horizontal fluidized bed reactor (3) serves as both a heat storage reactor and a heat release reactor; The fluidized state in the horizontal fluidized bed reactor (3) is suspension or boiling, not high-speed fluidization. Under rated operating conditions, the wind speed of the hood orifice is generally selected to be 20-50 m / s, the fluidization wind speed is in the range of 0.5-2.0 m / s, and when the reference temperature is 20°C, the fluidization air distribution structure is composed of an air distribution plate, an air chamber, a directional air hood and a fluidization air hood, mainly to put the material in a suspended or boiling fluidized state; The flow in the horizontal fluidized bed reactor (3) mainly depends on the directional air distribution structure; the movement speed and fluidization degree of the material in the reactor can be controlled by adjusting the air volume and valve opening of different air chambers, thereby controlling the reaction rate and the reaction amount of the material. The directional air distribution structure is composed of an air distribution plate, an air chamber, a coaxial directional air hood and a vertical axis directional air hood, which mainly allows the material to move along the designed direction, thereby playing the role of pneumatic conveying.

4. A horizontal high-efficiency integrated heat storage and heat release device according to claim 1, characterized in that: The reactants stored in the heat storage reaction material bin (1) are thermochemical heat storage materials; 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.

5. The horizontal high-efficiency integrated heat storage and heat release device according to claim 1 is characterized in that: The solid product cooler (4) is connected to the heat storage reaction material bin (1) during the heat release stage. When the reactant in the heat storage stage is a metal hydroxide, the gas product is water vapor. At this time, the induced draft fan (9) can be replaced by a water pump and the gas product storage tank (10) can be replaced by a water tank. The latent heat and sensible heat of the water vapor are recovered by the gas heat exchanger (8) and then pumped into the water tank for storage through the water pump.

6. A horizontal high-efficiency integrated heat storage and release device according to claim 1, characterized in that: The solid product cooler (4) can be in the form of a drum cooler, a fluidized bed cooler, a grate cooler, etc.

7. The process technology of a horizontal high-efficiency heat storage and heat release integrated process device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: In the heat storage stage, the heat storage reaction material bin (1) first feeds the reactants from the material preheater (2) into the horizontal fluidized bed reactor (3), and the materials enter the horizontal fluidized bed reactor (3) from the feed port (301). At this time, the emergency discharge port (302) is closed, and the high-temperature exothermic working fluid reacts and passes through the heat storage heat exchange surface (303) before entering the wind chamber (307). The gaseous products generated in the heat storage stage leave the horizontal fluidized bed reactor (3) together with the exothermic working fluid from the gas outlet (310). The waste heat recovery heat exchange surface (309) recovers the sensible heat of the fluidized working fluid and the gaseous products in the heat storage and heat release stages, and feeds the heat energy into the material preheater (2), thereby playing a role in preheating the materials before they enter the horizontal fluidized bed reactor (3); S2: High-temperature air or industrial waste heat enters the horizontal fluidized bed reactor (3) through the wind chamber (307), directly contacts the reactants and transfers heat energy to the reactants. The reactants are decomposed into solid products and gaseous products by heat. The high-temperature solid products recover sensible heat through the solid product cooler (4) and are finally stored in the heat storage solid product silo (5); S3: After the gaseous product and the fluidizing medium pass through the cyclone separator (6), the gaseous product is recovered by the gas selective separation membrane (7), and the exothermic medium is discharged according to the requirements of the original system or returned to the designed cycle. At this time, the heat storage valve (13) is in the open state. The separated gaseous product enters the gas heat exchanger (8) to recover the sensible heat, and is then sent to the gas product storage tank (10) by the induced draft fan (9). At this time, the heat release valve (11) is closed; S4: In the heat release stage, the reactants are first fed from the heat storage solid product silo (5) into the reactor 3 via the material preheater (2), and the reaction medium is fed into the horizontal fluidized bed reactor (3) by the blower (12). The heat release medium passes through the wind chamber (307) and directly contacts the material via the directional wind cap (304) and the fluidizing wind cap (306), and participates not only in the reaction but also in the fluidization. S5: The reactants react with the reaction medium to release heat energy. The excess reaction medium is separated from the solid material by the cyclone separator (6) and then passes through the gas selective separation membrane (7). It then enters the gas heat exchanger (8) to recover the sensible heat and is then sent back to the gas product storage tank (10) by the induced draft fan (9); S6: The heat energy is absorbed by the waste heat recovery heat exchange surface (309) provided in the horizontal fluidized bed reactor (3), and then transferred to the heat user. At this time, the heat release valve (11) is opened, and the heat storage valve (13) is closed. The high-temperature solid product recovers the sensible heat through the solid product cooler (4) and is finally stored in the heat storage reaction material bin (1) as the next heat storage reactant.

Images