Horizontal high-efficiency heat storage and heat release integrated device and process

Abstract

This invention discloses a horizontal, high-efficiency integrated thermal storage and release device and process, comprising: a thermal storage reaction material silo, a material preheater, a horizontal fluidized bed reactor, a solid product cooler, a thermal storage solid product silo, a cyclone separator, a gas selective separation membrane, a gas heat exchanger, an induced draft fan, a gas product storage tank, a release valve, a blower, and a thermal storage valve. The advantages of this invention compared to existing technologies are: a rational process, wide application range, large processing capacity, high system integration, reduced wear and pulverization of thermal storage materials, and improved reactor thermal efficiency and overall system thermal efficiency.

Description

Technical Field

[0001] This invention belongs to the field of energy storage technology, specifically relating to a horizontal high-efficiency integrated device and process for heat storage and release. Background Technology

[0002] Thermal energy storage technologies can be broadly categorized into three types based on their principles: sensible heat storage, latent heat storage (phase change energy storage), and thermochemical heat storage. Thermochemical heat storage technology utilizes reversible chemical reactions to store and release thermal energy. Compared to sensible and latent heat storage technologies, thermochemical heat storage produces reactants with high heat storage density after heat storage. This eliminates the unavoidable heat dissipation problems inherent in sensible and latent heat storage during inter-seasonal storage. The core of this technology lies in utilizing the thermal effect of chemical reactions. During the charging phase, electrical or thermal energy is converted into chemical energy for storage, while during the discharging phase, heat energy is released through a reverse reaction to meet diverse needs such as heating and industrial steam. This technology not only achieves highly efficient energy conversion but also meets inter-seasonal and even inter-year energy storage requirements.

[0003] The prerequisite for utilizing thermochemical thermal storage technology is selecting suitable thermal storage materials based on the reaction system. Currently, typical thermal storage material systems include metal oxides, carbonates, metal hydroxides, metal hydrides, amino compounds, and methane reforming systems. However, given the significant differences between these reaction systems in terms of reaction conditions, material physical states, and product characteristics, current technology cannot provide a universal reactor to fully meet the thermal storage and exothermic reaction requirements of all thermal storage materials. Therefore, to promote more efficient and widespread application of thermochemical thermal storage technology, reactor design and optimization are key technical challenges that urgently need to be overcome.

[0004] The prior art patent number CN2019201275902 discloses a thermochemical thermal storage system using a fluidization process. This system uses a method of fluidizing solid reactants with gaseous reactants or heated gas medium to make the thermochemical reaction occur during the fluidization process of the reactants. The thermal 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 reactant hopper and a product hopper.

[0005] However, existing patents have the following drawbacks:

[0006] (1) The movement of materials in the reactor is disordered and rapid, and only by relying on multiple cycles can sufficient reaction time be guaranteed. However, the high fluidization velocity intensifies the collision 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 only has water-cooled walls as heating surfaces, lacking the arrangement of heating surfaces inside the furnace, which seriously affects the heat exchange efficiency of the reactor. The lack of sensible heat recovery from solid materials 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 gaseous products from the air, which seriously affects the system's effectiveness and economy in using carbonate and metal oxide materials.

[0009] (4) It cannot solve the demand for cross-seasonal energy storage and the problem of low equipment utilization when storing heat across seasons. Summary of the Invention

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

[0011] To solve the above problems, the technical solution of the present invention is: a horizontal high-efficiency integrated heat storage and heat release device, comprising: a heat storage reaction material silo, a material preheater, a horizontal fluidized bed reactor, a solid product cooler, a heat storage solid product silo, 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 thermal storage reactor material silo is used to store reactants:

[0013] The material preheater is connected to the thermal storage reaction material silo, and the material preheater is used to receive the reactants in the thermal storage reaction material silo and preheat them.

[0014] The horizontal fluidized bed reactor is connected to the material preheater. The horizontal fluidized bed reactor is used to receive reactants for reaction. The horizontal fluidized bed reactor includes a feed port, an emergency discharge port, a heat storage and 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. The solid product cooler is used to receive the high-temperature solid products generated by the thermal decomposition of reactants in the horizontal fluidized bed reactor and absorb the sensible heat of the high-temperature solid products.

[0016] The thermal storage solid product silo is connected to the solid product cooler and the material preheater. During the thermal storage stage, the thermal storage solid product silo is used to store solid products after sensible heat recovery. During the heat release stage, the thermal storage solid product silo is used to fill the reactants into the horizontal fluidized bed reactor via the material preheater.

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

[0018] The gas product storage tank is connected to the gas heat exchanger via an induced draft fan. 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 exothermic valve of the horizontal fluidized bed reactor and the gas product storage tank. During the exothermic phase, the blower delivers the working fluid in the gas product storage tank into the horizontal fluidized bed reactor.

[0020] The thermal storage valve is installed on one side of the cyclone separator. During the thermal storage stage, the thermal storage valve is used to discharge excess air to the outside or send excess air back into the design cycle.

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

[0022] The accident discharge port is fixedly connected to the bottom end of the feed port pipe via a pipeline;

[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 is directly opposite the feed port pipe.

[0024] The partition wall is fixedly connected to the middle of the inner side of the horizontal fluidized bed reactor, and directional air caps are installed between the partition walls;

[0025] The air chamber is located at the bottom of the inner side of the horizontal fluidized bed reactor. A fluidizing air cap is installed at the top of the air chamber, and a pipe with a discharge port is fixedly connected to the bottom of the air chamber.

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

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

[0028] Furthermore, the horizontal fluidized bed reactor serves 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 operating conditions, the air velocity at the small orifice of the air cap is generally selected to be 20~50m / s, and the fluidization air velocity is in the range of 0.5~2.0m / s. When the reference temperature is 20℃, the fluidization air distribution structure consists of an air distribution plate, an air chamber, and a fluidization air cap, which mainly keeps the material in a suspension or boiling fluidized state.

[0030] The flow within the horizontal fluidized bed reactor mainly relies on the directional air distribution structure. By adjusting the air volume of different air chambers and the valve opening, the movement speed and fluidization degree of the material in the reactor can be controlled, thereby controlling the reaction rate and the amount of material reacted. The directional air distribution structure consists of an air distribution plate, air chambers, coaxial directional air caps, and vertical axis directional air caps, which mainly make the material run along the designed direction, playing the role of pneumatic conveying.

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

[0032] For metal oxide series in thermal storage materials, the reactants in the thermal storage stage are metal oxides, including but not limited to BaO2, Co3O4, CuO, Mn2O3, etc., the solid products are BaO, CoO, Cu2O, Mn3O4, etc., the gaseous products are oxygen (O2), the heat release reaction is a reversible reaction of thermal storage reaction, the solid reactants are including but not limited to BaO, CoO, Cu2O, Mn3O4, etc., the solid products are BaO2, Co3O4, CuO, Mn2O3, etc.;

[0033] For metal hydroxide series in thermal storage materials, the reactants in the thermal storage stage are metal hydroxides, including but not limited to Mg(OH)2, Ca(OH)2, Fe(OH)2, etc., the solid products are MgO, CaO, Fe2O3, etc., the gaseous products are water vapor (H2O), and after heat exchange, it can be stored in the form of liquid water. The heat release reaction is a reversible reaction of thermal storage reaction. The solid reactants include but are not limited to MgO, CaO, Fe2O3, etc., and H2O can be in the form of liquid water or water vapor. The solid products are Mg(OH)2, Ca(OH)2, Fe(OH)2, etc.

[0034] For carbonate series thermal storage materials, the reactants in the thermal storage stage are carbonates, including but not limited to MgCO3, CaCO3, SrCO3, etc., the solid products are MgO, CaO, SrO, etc., and the gaseous products are carbon dioxide (CO2). The heat release reaction is a reversible reaction of the thermal storage reaction, and the solid reactants are including but not limited to MgO, CaO, SrO, etc., and the solid products are MgCO3, CaCO3, SrCO3, etc.

[0035] Furthermore, the solid product cooler is connected to the heat storage reaction material silo during the heat release stage. When the reactant in the heat storage stage is a metal hydroxide, the gaseous product is water vapor. At this time, the induced draft fan can be replaced by a water pump and the gaseous 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 pumped into the water tank for storage.

[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] This invention also provides a process flow for a horizontal high-efficiency integrated heat storage and heat release device, comprising the following steps:

[0038] S1: In the heat storage stage, the reactants are first sent from the heat storage reaction material silo to the horizontal fluidized bed reactor through the material preheater. The material enters the horizontal fluidized bed reactor from the feed port. At this time, the emergency discharge port is closed. The high-temperature exothermic working fluid reacts and enters the wind chamber after passing through the heat storage heat exchange surface. The gaseous products generated 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 fluid and gaseous products in the heat storage and exothermic stages and sends the heat energy to the material preheater, which plays a role in preheating the material before it enters the horizontal fluidized bed reactor.

[0039] S2: High-temperature air or industrial waste heat enters the horizontal fluidized bed reactor through the air chamber, directly contacts the reactants and transfers heat energy to the reactants. The reactants are heated and decomposed into solid products and gaseous products. 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 fluidized fluid pass through the cyclone separator, the gaseous product is recovered using a gas selective separation membrane, while the exothermic working fluid is discharged according to the original system requirements or returned to the design cycle. At this time, the heat storage valve is in the open state. The separated gaseous product enters the gas heat exchanger to recover sensible heat, and is then sent to the gaseous product storage tank by an induced draft fan. At this time, the exothermic valve is closed.

[0041] S4: In the exothermic stage, the reactants are first filled into the reactor through the material preheater by the heat storage solid product silo. The working fluid is sent into the horizontal fluidized bed reactor by the blower. The exothermic working fluid passes through the wind chamber and is in direct contact with the material by the directional wind cap and the fluidizing wind cap. It not only participates in the reaction but also in the fluidization.

[0042] S5: The reactants react with the working fluid to release heat energy. The excess working fluid is separated into solid materials by a cyclone separator, then passes through a gas selective separation membrane, enters a gas heat exchanger to recover sensible heat, and is then sent back to the gas product storage tank by an induced draft fan.

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

[0044] The advantages of this invention compared to existing technologies are:

[0045] The new equipment proposed in this invention adopts low-velocity fluidization technology to solve the problem of wear and pulverization of thermal storage materials caused by high fluidization velocity in vertical fluidized beds.

[0046] The new equipment proposed in this invention has an internal heating surface that can recover the sensible heat of the fluidized bed, thereby improving the thermal efficiency of the reactor. The new process proposed in this invention solves the technical problem that the sensible heat of thermochemical thermal storage technology cannot be recovered, and effectively improves the overall thermal efficiency of the system.

[0047] The new equipment proposed in this invention solves the problem of separating fluidized matter from gaseous products when fluidized matter is directly heated to thermal storage materials.

[0048] This invention addresses the need for cross-seasonal energy storage. The new system integrates heat storage and release processes, with the reactor capable of meeting the technical requirements of both heat storage and heat release reactions. This new system overcomes the problems of complexity and low energy utilization in traditional thermochemical heat storage systems. The new system boasts high equipment utilization and low investment costs. Attached Figure Description

[0049] Figure 1 This is a system schematic diagram of the thermal storage process.

[0050] Figure 2 This is a schematic diagram of the exothermic process.

[0051] Figure 3 This is a schematic diagram of the structure of the horizontal fluidized bed reactor 3.

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

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

[0054] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0056] like Figures 1 to 4 As shown, a horizontal high-efficiency integrated heat storage and heat release device includes: a heat storage reaction material silo 1, a material preheater 2, a horizontal fluidized bed reactor 3, a solid product cooler 4, a heat storage solid product silo 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.

[0057] The thermal storage reaction material silo 1 is used to store reactants. The reactants stored in the thermal storage reaction material silo 1 are thermochemical thermal storage materials. For the metal oxide series of thermal storage materials, the reactants in the thermal 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., and the gaseous products refer to oxygen (O2). The heat release reaction is a reversible reaction of the thermal 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.

[0058] For metal hydroxide series in thermal storage materials, the reactants in the thermal storage stage are metal hydroxides, including but not limited to Mg(OH)2, Ca(OH)2, Fe(OH)2, etc., the solid products are MgO, CaO, Fe2O3, etc., the gaseous products are water vapor (H2O), and after heat exchange, it can be stored in the form of liquid water. The heat release reaction is a reversible reaction of thermal storage reaction. The solid reactants include but are not limited to MgO, CaO, Fe2O3, etc., and H2O can be in the form of liquid water or water vapor. The solid products are Mg(OH)2, Ca(OH)2, Fe(OH)2, etc.

[0059] For carbonate series thermal storage materials, the reactants in the thermal storage stage are carbonates, including but not limited to MgCO3, CaCO3, SrCO3, etc., the solid products are MgO, CaO, SrO, etc., and the gaseous products are carbon dioxide (CO2). The heat release reaction is a reversible reaction of the thermal storage reaction, and the solid reactants are including but not limited to MgO, CaO, SrO, etc., and the solid products are MgCO3, CaCO3, SrCO3, etc.

[0060] The material preheater 2 is connected to the thermal storage reaction material silo 1. The material preheater 2 is used to receive the reactants in the thermal storage reaction material silo 1 and preheat them.

[0061] The horizontal fluidized bed reactor 3 is connected to the material preheater 2. The horizontal fluidized bed reactor 3 serves as both a heat storage reactor and a heat release reactor. The horizontal fluidized bed reactor 3 is used to receive reactants for reaction.

[0062] Solid product cooler 4 is connected to horizontal fluidized bed reactor 3. Solid product cooler 4 is used to receive high-temperature solid products generated by the thermal decomposition of reactants in horizontal fluidized bed reactor 3 and absorb the sensible heat of high-temperature solid products. Solid product cooler 4 can be in the form of drum cooler, fluidized bed cooler, grate cooler, etc. Solid product cooler 4 is connected to heat storage reaction material silo 1 during the heat release stage. When the reactant in the heat storage stage is metal hydroxide, the gaseous product is water vapor. At this time, induced draft fan 9 can be replaced by water pump and gaseous product storage tank 10 can be replaced by water tank. The latent heat and sensible heat of water vapor are recovered by gas heat exchanger 8 and then pumped into water tank for storage.

[0063] The thermal storage solid product silo 5 is connected to the solid product cooler 4 and the material preheater 2. During the thermal storage stage, the thermal storage solid product silo 5 is used to store solid products after sensible heat recovery. During the heat release stage, the thermal storage solid product silo 5 is used to fill the reactants into the horizontal fluidized bed reactor 3 via the material preheater 2.

[0064] 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, and the gas selective separation membrane 7 can separate gaseous products and recover them to the gas heat exchanger 8. The gas heat exchanger 8 is used to absorb the sensible heat in the gaseous products.

[0065] The gas product storage tank 10 is connected to the gas heat exchanger 8 via an 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.

[0066] 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. During the heat release stage, the blower 12 sends the working medium in the gas product storage tank 10 into the horizontal fluidized bed reactor 3.

[0067] The thermal storage valve 13 is installed on one side of the cyclone separator 6. During the thermal storage stage, the thermal storage valve 13 is used to discharge excess air to the outside or send excess air back into the design cycle.

[0068] The horizontal fluidized bed reactor 3 includes a feed inlet 301, an emergency discharge port 302, a heat storage and 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 inlet 301 is fixedly connected to one side of the horizontal fluidized bed reactor 3 via a pipe, the emergency discharge port 302 is fixedly connected to the bottom end of the pipe of the feed inlet 301 via a pipe, and the heat storage and heat exchange surface 303 is fixedly connected to the middle of the inner side of the horizontal fluidized bed reactor 3, with the heat storage and heat exchange surface 303 directly opposite the feed inlet 301. The pipeline 1, the partition wall 305 is fixedly connected to the middle of the inner side of the horizontal fluidized bed reactor 3, the directional air cap 304 is installed between the partition walls 305, the air chamber 307 is set at the bottom of the inner side of the horizontal fluidized bed reactor 3, the top of the air chamber 307 is installed with a fluidizing air cap 306, the bottom of the air chamber 307 is fixedly connected to the pipeline with a discharge port 308, the waste heat recovery heat exchange surface 309 is set at the top of the inner side of the horizontal fluidized bed reactor 3, and the gas outlet 310 is fixedly connected to the top of the horizontal fluidized bed reactor 3 through the pipeline.

[0069] The fluidization state in the horizontal fluidized bed reactor 3 is suspension or boiling, not high-speed fluidization. Under rated operating conditions, the air velocity at the small orifice of the air cap is generally selected as 20 ~ 50 m / s, and the fluidization air velocity is in the range of 0.5 ~ 2.0 m / s. When the reference temperature is 20℃, the fluidization air distribution structure consists of an air distribution plate, an air chamber, and a fluidization air cap, which mainly keeps the material in a suspension or boiling fluidized state.

[0070] The flow within the horizontal fluidized bed reactor 3 mainly relies on the directional air distribution structure. By adjusting the air volume of different air chambers and the valve opening, the movement speed and fluidization degree of the material in the reactor can be controlled, thereby controlling the reaction rate and the amount of material reacted. The directional air distribution structure consists of air distribution plates, air chambers, coaxial directional air caps, and vertical axis directional air caps, which mainly make the material run along the designed direction, playing the role of pneumatic conveying.

[0071] A process flow diagram of a horizontal high-efficiency integrated heat storage and heat release device includes the following steps:

[0072] S1: In the heat storage stage, the reactants are first fed into the horizontal fluidized bed reactor 3 by the heat storage reaction material silo 1 through the material preheater 2. The material enters the horizontal fluidized bed reactor 3 from the feed port 301. At this time, the emergency discharge port 302 is closed. The high-temperature exothermic working medium reacts and enters the wind chamber 307 after passing through the heat storage heat exchange surface 303. The gaseous products generated in the heat storage stage leave the horizontal fluidized bed reactor 3 together with the exothermic working medium from the gas outlet 310. The waste heat recovery heat exchange surface 309 recovers the sensible heat of the fluidized medium and gaseous products in the heat storage and exothermic stages and sends the heat energy into the material preheater 2, which plays a role in preheating the material before it enters the horizontal fluidized bed reactor 3.

[0073] S2: High-temperature air or industrial waste heat enters the horizontal fluidized bed reactor 3 through the air chamber 307, directly contacting the reactants and transferring heat energy to the reactants. The reactants are heated and decomposed into solid products and gaseous products. 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.

[0074] S3: After the gaseous product and the fluidized medium pass through the cyclone separator 6, the gaseous product is recovered using the gas selective separation membrane 7, while the exothermic working medium is discharged according to the original system requirements or returned to the design 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 sensible heat, and is then sent to the gaseous product storage tank 10 by the induced draft fan 9. At this time, the exothermic valve 11 is closed.

[0075] S4: In the exothermic stage, the reactants are first filled into the horizontal fluidized bed reactor 3 by the heat storage solid product silo 5 through the material preheater 2. The working fluid is sent into the horizontal fluidized bed reactor 3 by the blower 12. The exothermic working fluid passes through the wind chamber 307 and is directly in contact with the material by the directional wind cap 304 and the fluidizing wind cap 306, participating not only in the reaction but also in the fluidization.

[0076] S5: The reactants react with the working medium to release heat energy. The excess working medium is separated into solid materials by the cyclone separator 6 and then passes through the gas selective separation membrane 7 before entering the gas heat exchanger 8 to recover sensible heat. Finally, it is sent back to the gas product storage tank 10 by the induced draft fan 9.

[0077] S6: Heat energy is absorbed by the heat exchange medium through the waste heat recovery heat exchange surface 309 set 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 sensible heat through the solid product cooler 4 and is finally stored in the heat storage reaction material silo 1 as the heat storage reaction material for the next time. Example

[0078] The solution in Example 1 will be further described below with reference to its specific working method.

[0079] Reference Figure 1 The thermal storage material is MgCO3 / MgO, and the system is applied to the consumption of new energy green electricity. In the thermal storage stage, MgCO3 is first fed from the thermal storage reaction material silo 1 into the horizontal fluidized bed reactor 3 via the material preheater 2. Then, high-temperature air (400~500 ℃) is fed into the horizontal fluidized bed reactor 3 through the air chamber 307 by an electric air heater, directly heating the MgCO3, which decomposes into MgO and CO2. The thermal energy is stored in the form of chemical energy. The temperature of the reaction product MgO is between 300~400 ℃. To avoid wasting this sensible heat, a drum cooler is used to cool the MgO to below 150 ℃, and it is finally stored in the thermal storage solid product silo 5 as a reactant for the exothermic reaction. CO2 and air pass through the cyclone separator 6, and the CO2 is recovered using the gas selective separation membrane 7, while the air is discharged according to the original system requirements or returned to the design cycle. At this time, the thermal storage valve 13 is in the open state. The separated CO2 enters the gas heat exchanger 8, where its temperature is reduced to below 50 °C. It is then sent to the gas product storage tank 10 by the induced draft fan 9, at which point the heat release valve 11 is closed. The recovered heat is then supplied to nearby heat users. The gas heat exchanger 8 and the drum cooler can provide the recovered heat to nearby heat users.

[0080] Reference Figure 2 In the exothermic stage, MgO is first fed into the horizontal fluidized bed reactor 3 via the material preheater 2 from the thermal 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. Excess CO2 is separated from the solid material by the cyclone separator 6, then passes through the gas selective separation membrane 7, and enters the gas heat exchanger 8 to recover sensible heat. It is then sent back to the gas product storage tank 10 by the induced draft fan 9, and can continue to be fed into the reactor as a working medium. Heat energy is absorbed by the working medium through the heat exchange surface set in the reactor and then transferred to the heat user. At this time, the exothermic valve 11 is opened and the thermal storage valve 13 is closed. After the reaction, the temperature of MgCO3 obtained is between 400 and 500 ℃. In order not to waste this part of sensible heat, the MgO is cooled to below 100 ℃ using a drum cooler and finally stored in the thermal storage reaction material silo 1 as a reactant for the thermal storage reaction. Example

[0081] The solution in Example 1 will be further described below with reference to its specific working method.

[0082] Reference Figure 1The thermal storage material is BaO2 / BaO, and the system is used in a gas-steam combined cycle power generation system. During the thermal storage stage, BaO2 is first fed into a horizontal fluidized bed reactor 3 via a material preheater 2. Then, the 500-600°C hot flue gas generated by the gas turbine is fed into the horizontal fluidized bed reactor 3 to directly heat the BaO2, causing it to decompose into BaO and O2. The thermal energy is stored in the form of chemical energy. The reaction product BaO has a temperature between 400-500°C. To avoid wasting this sensible heat, a drum cooler is used to cool the BaO to below 150°C, and it is finally stored in the thermal storage solid product silo 5 as a reactant in the heat release reaction. O2 and the gas turbine exhaust gas pass through a cyclone separator 6, where a gas selective separation membrane 7 recovers the O2. The flue gas returns to the design cycle as required by the original system, and at this time, the thermal storage valve 13 is open. The separated O2 enters the gas heat exchanger 8, where its temperature is reduced to below 50 °C. It is then sent to the gas product storage tank 10 by the induced draft fan 9, at which point the heat release valve 11 is closed. The recovered heat is supplied to nearby heat users. The gas heat exchanger 8 and the drum cooler can utilize the generator set's feedwater, which helps improve the thermal efficiency of the power generation system.

[0083] Reference Figure 2 In the exothermic stage, BaO is first fed into the horizontal fluidized bed reactor 3 via the material preheater 2 from the thermal storage solid product silo 5. O2 is sent into the horizontal fluidized bed reactor 3 by the blower 12. BaO reacts with O2 to release heat energy. Excess O2 is separated from the solid material by the cyclone separator 6, then passes through the gas selective separation membrane 7, and enters the gas heat exchanger 8 to recover sensible heat. It is then sent back to the gas product storage tank 10 by the induced draft fan 9, and can continue to be fed into the reactor as a working medium. Heat energy is absorbed by the working medium through the heat exchange surface set in the reactor and then transferred to the heat user. At this time, the exothermic valve 11 is opened and the thermal storage valve 13 is closed. The temperature of BaO2 obtained after the reaction is between 400 and 500 ℃. In order not to waste this part of sensible heat, the BaO2 is cooled to below 100 ℃ by the drum cooler and finally stored in the thermal storage reaction material silo 1 as a reactant for the thermal storage reaction.

[0084] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The detailed description of known functions and known components is omitted in the specific embodiments of this disclosure. In order to ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0085] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which 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: Thermal storage reaction material silo (1), material preheater (2), horizontal fluidized bed reactor (3), solid product cooler (4), thermal storage solid product silo (5), cyclone separator (6), gas selective separation membrane (7), gas heat exchanger (8), induced draft fan (9), gas product storage tank (10), heat release valve (11), blower (12) and thermal storage valve (13); The thermal storage reactor material silo (1) is used to store reactants: The material preheater (2) is connected to the thermal storage reaction material silo (1). The material preheater (2) is used to receive the reactants in the thermal storage reaction material silo (1) and preheat them. The horizontal fluidized bed reactor (3) is connected to the material preheater (2). The horizontal fluidized bed reactor (3) is used to receive reactants for reaction. 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 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 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 solid products with sensible heat recovery during the heat storage stage. During the heat release 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). 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) separates and removes solid products, and the gas selective separation membrane (7) separates gaseous products and recovers them and sends them to the gas heat exchanger (8). The gas heat exchanger (8) is used to absorb the sensible heat in the gaseous products. The gas product storage tank (10) is connected to the gas heat exchanger (8) via an induced draft fan (9). The induced draft fan (9) sends the gas products 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). The blower (12) is connected between the exothermic valve (11) of the horizontal fluidized bed reactor (3) and the gas product storage tank (10). During the exothermic phase, the blower (12) sends the working medium in the gas product storage tank (10) into the horizontal fluidized bed reactor (3). 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 send excess air back into the design cycle.

2. The horizontal high-efficiency integrated heat storage and heat 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) via a pipe; The accident discharge port (302) is fixedly connected to the bottom end of the feed port (301) via a pipe; The heat storage and 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 and heat exchange surface (303) is directly opposite the pipe of the feed port (301); The partition wall (305) is fixedly connected to the middle of the inner side of the horizontal fluidized bed reactor (3), and directional air caps (304) are installed between the partition walls (305). The air chamber (307) is located at the bottom of the inner side of the horizontal fluidized bed reactor (3). A fluidizing air cap (306) is installed at the top of the air chamber (307), and a pipe with a discharge port (308) is fixedly connected to the bottom of the air chamber (307). The waste heat recovery heat exchange surface (309) is located on 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) via a pipeline.

3. The 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 fluidization state in the horizontal fluidized bed reactor (3) is suspension or boiling. Under rated operating conditions, the fluidization air velocity is in the range of 0.5 ~ 2.0 m / s, the reference temperature is 20 ℃, and the fluidization air distribution structure consists of air distribution plate, air chamber, directional air cap and fluidization air cap. The flow in the horizontal fluidized bed reactor (3) relies on the directional air distribution structure; by adjusting the air volume of different air chambers and the valve opening, the movement speed and fluidization degree of the material in the reactor are controlled, thereby controlling the reaction rate and the amount of material reacted. The directional air distribution structure consists of an air distribution plate, air chambers, coaxial directional air caps and vertical axis directional air caps, so that the material runs along the design direction and plays the role of pneumatic conveying.

4. The horizontal high-efficiency integrated heat storage and heat release device according to claim 1, characterized in that: The reactants stored in the thermal storage reaction material silo (1) are thermochemical thermal storage materials; For metal oxide series in thermal storage materials, the reactants in the thermal storage stage are metal oxides, including BaO2, Co3O4, CuO or Mn2O3, the solid products are BaO, CoO, Cu2O or Mn3O4, the gaseous products are oxygen, the heat release reaction is a reversible reaction of thermal storage reaction, the solid reactants include BaO, CoO, Cu2O or Mn3O4, and the solid products are BaO2, Co3O4, CuO or Mn2O3; For metal hydroxide series in thermal storage materials, the reactants in the thermal storage stage are metal hydroxides, including Mg(OH)2, Ca(OH)2 or Fe(OH)2, the solid products are MgO, CaO or Fe2O3, the gaseous products are water vapor, and after heat exchange, it is stored in the form of liquid water. The heat release reaction is a reversible reaction of thermal storage reaction. The solid reactants include MgO, CaO or Fe2O3, the water is in the form of liquid water or water vapor, and the solid products are Mg(OH)2, Ca(OH)2 or Fe(OH)2. For carbonate series thermal storage materials, the reactants in the thermal storage stage are carbonates, including MgCO3, CaCO3 or SrCO3, the solid products are MgO, CaO or SrO, the gaseous products are carbon dioxide, the heat release reaction is a reversible reaction of the thermal storage reaction, the solid reactants are MgO, CaO or SrO, and the solid products are MgCO3, CaCO3 or SrCO3.

5. The horizontal high-efficiency integrated heat storage and heat release device according to claim 4, characterized in that: The solid product cooler (4) is connected to the heat storage reaction material silo (1) during the heat release stage. When the reactant in the heat storage stage is metal hydroxide, the gaseous product is water vapor. At this time, the induced draft fan (9) is replaced by a water pump and the gaseous product storage tank (10) is 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 into the water tank for storage by the water pump.

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

7. The process flow of a horizontal high-efficiency integrated heat storage and heat release device according to any one of claims 1 to 6, characterized in that: Includes the following steps: S1: In the heat storage stage, the reactants are first sent from the heat storage reaction material silo (1) to the horizontal fluidized bed reactor (3) via the material preheater (2). The material enters the horizontal fluidized bed reactor (3) from the feed port (301). At this time, the emergency discharge port (302) is closed. The high-temperature exothermic working medium reacts and enters the wind chamber (307) after passing through the heat storage heat exchange surface (303). The gaseous products generated in the heat storage stage leave the horizontal fluidized bed reactor (3) together with the exothermic working medium from the gas outlet (310). The waste heat recovery heat exchange surface (309) recovers the sensible heat of the fluidized medium and gaseous products in the heat storage and exothermic stages and sends the heat energy to the material preheater (2) to play the role of preheating the material before it enters the horizontal fluidized bed reactor (3). S2: High-temperature air or industrial waste heat enters the horizontal fluidized bed reactor (3) through the air 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 fluidized medium pass through the cyclone separator (6), the gaseous product is recovered by the gas selective separation membrane (7), while the heat-releasing working medium is discharged according to the requirements of the original system or returned to the design cycle. At this time, the heat storage valve (13) is in the open state, and the separated gaseous product enters the gas heat exchanger (8) to recover the sensible heat, and is then sent to the gaseous product storage tank (10) by the induced draft fan (9). At this time, the heat-releasing valve (11) is closed. S4: In the exothermic stage, the reactants are first filled into the horizontal fluidized bed reactor (3) through the material preheater (2) by the heat storage solid product silo (5). The working medium is sent into the horizontal fluidized bed reactor (3) by the blower (12). The exothermic working medium passes through the wind chamber (307) and is directly in contact with the material by the directional wind cap (304) and the fluidizing wind cap (306), participating not only in the reaction but also in the fluidization. S5: The reactants react with the working medium to release heat energy. The excess working medium is separated into solid materials by the cyclone separator (6), then passes through the gas selective separation membrane (7), and enters the gas heat exchanger (8) to recover sensible heat. The gas is then sent back to the gas product storage tank (10) by the induced draft fan (9). S6: Heat energy is absorbed by the heat exchange medium through the waste heat recovery heat exchange surface (309) set 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 silo (1) as the heat storage reaction material for the next time.

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