Solid-state thermochemical energy storage device

Abstract

The utility model provides a solid thermochemical energy storage device which comprises a reaction shell, the reaction shell comprises a preheating zone, a heating zone and a cooling zone which are sequentially arranged in the axial direction, a feeding mechanism and a spiral feeding mechanism are arranged at the inlet end of the preheating zone, the feeding mechanism is used for providing energy storage materials, and the spiral feeding mechanism is used for providing energy storage materials. The spiral feeding mechanism is used for conveying the energy storage materials to a preheating area, a heating area and a cooling area in sequence, a heating mechanism is arranged in the heating area, a cooling fan is arranged at the end, away from the heating area, of the cooling area, the cooling fan faces the heating area, and a discharging mechanism is further arranged in the cooling area. According to the utility model, multi-stage and inversion bidirectional utilization is carried out on energy, and the overall energy storage efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and relates to a solid-state thermochemical energy storage device. Background Technique

[0002] Energy storage refers to the process of storing energy through media or devices and releasing it when needed. As a new type of energy storage method, chemical energy storage mainly includes battery pack energy storage, compressed air energy storage, pumped-storage energy storage, etc. It has the advantages of high energy density, high efficiency, and environmental friendliness. Among them, different chemical energy storage methods have their own advantages and disadvantages. For example, during the process of storing electrochemical energy in a battery, the battery manufacturing cost is high, the investment is large, and it is greatly affected by the ambient temperature, and the function decays quickly; compressed air energy storage can compress and store air underground during the low electricity demand period, but the pressure space volume is large, especially for large-scale energy storage, matching caves, etc. are also required; pumped-storage energy storage uses water resources such as water flow and water level difference to convert into electric energy, but it has relatively high requirements for the height difference and geological conditions of the application site.

[0003] Thermochemical energy storage usually realizes the process of heat storage and utilization based on reversible chemical reactions, and has the advantages of large energy density, high energy conversion rate, and environmental friendliness. However, most of the existing thermochemical energy storage and energy conversion devices have problems such as large volume, complex structure, and unstable system operation, resulting in low efficiency and high energy consumption. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a solid-state thermochemical energy storage device, which can realize continuous production, utilize energy in multiple levels and in an inverse bidirectional manner, and improve the overall energy storage efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a solid-state thermochemical energy storage device, the solid-state thermochemical energy storage device includes a reaction shell, the reaction shell includes a preheating zone, a heating zone and a cooling zone arranged in sequence along the axis, a feeding mechanism and a screw feeding mechanism are arranged at the inlet end of the preheating zone, the feeding mechanism is used to provide energy storage materials, the screw feeding mechanism is used to sequentially convey the energy storage materials to the preheating zone, the heating zone and the cooling zone, a heating mechanism is arranged in the heating zone, a cooling fan is arranged at one end of the cooling zone far away from the heating zone, the cooling fan faces the heating zone, and a discharging mechanism is also arranged in the cooling zone.

[0007] The utility model utilizes a feeding mechanism to carry out quantitative feeding, and promotes the energy storage material to flow inside the reaction shell through a spiral feeding mechanism, decomposes and releases heat at high temperature in the heating zone, and cools down the energy storage material in the cooling zone by the reverse blowing of a cooling fan, and then the cooled energy storage material is discharged under the action of a discharging mechanism, and the cold wind generated by the cooling fan is converted into hot wind and blown to the heating zone, so as to bring the steam in the heating zone to the preheating zone to realize the preheating function, and the hot wind fully exchanges heat with the new feed, thereby increasing the temperature of the energy storage material before the heating zone, making full use of the heat in the reaction shell, and performing multi-stage, inverter bidirectional utilization of energy to realize continuous production, and the energy storage process is pollution-free and emission-free, and the output of the energy storage material can be dynamically and flexibly adjusted.

[0008] The energy storage material described in the utility model can decompose and release heat at high temperature, and any energy storage material known to those skilled in the art that can achieve the above function can be used, for example, it can be a calcium energy storage material or a magnesium energy storage material, both of which are commercially available materials known in the art.

[0009] Taking calcium hydroxide as an example, the utility model provides the following operation process of the solid-state thermochemical energy storage device: the heating mechanism is started for heating, the calcium hydroxide is fed into the reaction shell by the feeding mechanism, the energy storage material is pushed to flow inside the reaction shell by the spiral feeding mechanism, a decomposition reaction occurs in the heating zone, it becomes water vapor and calcium oxide, and generates heat; the cooling fan arranged in the cooling zone cools the calcium oxide that has completed the reaction by feeding air, so that the calcium oxide is cooled down by the blowing of the cold air, and the cold air becomes hot air, the cooled calcium oxide is discharged from the reaction shell through the discharging mechanism, the hot air passes through the high temperature zone, and brings the water vapor generated by the calcium hydroxide reaction to the preheating zone on the feeding side, so as to realize the preheating function of the newly entered energy storage material. That is, on the one hand, the hot air brings out the water vapor generated by the reaction in the heating zone, and at the same time realizes the further increase of the wind temperature; on the other hand, in the preheating zone, the hot air and the newly entered energy storage material are fully heat exchanged, the material temperature before the heating zone is increased, the wind temperature is reduced, and the heat is utilized to the maximum extent.

[0010] As a preferred technical solution of the utility model, the feeding mechanism includes a hopper, the hopper is connected to the reaction shell, and a feeding valve is also provided on the hopper.

[0011] The utility model adjusts the feeding amount of the energy storage material through the feeding valve, thereby realizing dynamic adjustment of the output of the energy storage material.

[0012] As a preferred technical solution of the utility model, the spiral feeding mechanism includes a driving motor and a spiral blade, one end of the spiral blade is located in the reaction shell and extends to the cooling zone, and the other end of the spiral blade extends out of the reaction shell and is transmission-connected to the driving motor.

[0013] The screw feeding mechanism of the present utility model is shaftless screw driven, and the energy storage material is driven by the screw blade to move along the reaction shell, realizing continuous feeding.

[0014] As a preferred technical solution of the present utility model, the screw blade is a shaftless screw blade.

[0015] As a preferred technical solution of the present utility model, the driving motor is a variable frequency motor.

[0016] The present utility model performs variable frequency adjustment on the screw blade, enabling the stable operation of the entire device, power matching, and realizing continuous and energy-saving production.

[0017] As a preferred technical solution of the present utility model, the discharging mechanism includes a blanking pipe, the blanking pipe is connected to the reaction shell, and a gravity flap valve is further provided at the outlet of the blanking pipe.

[0018] The present utility model supplies air from the tail of the reaction shell to realize the two-way utilization of cold air cooling in the cooling zone and material preheating in the preheating zone, fully utilize heat, and discharge the cooled energy storage material into the blanking pipe. When the weight of the material in the blanking pipe reaches the set threshold, the gravity flap valve automatically opens to discharge the material from the reaction shell.

[0019] As a preferred technical solution of the present utility model, a vibration component is provided on the outer peripheral wall of the blanking pipe.

[0020] As a preferred technical solution of the present utility model, the end of the screw blade in the cooling zone is located at the central part of the inlet of the blanking pipe.

[0021] As a preferred technical solution of the present utility model, an exhaust pipe is further provided on the reaction shell, and the exhaust pipe is connected to the preheating zone.

[0022] In the present utility model, the air and water vapor in the reaction shell can be discharged to the atmosphere through the exhaust pipe, or collected after being discharged and recycled.

[0023] As a preferred technical solution of the present utility model, the linear length of the preheating zone along the axial direction of the reaction shell and the linear length of the cooling zone along the axial direction of the reaction shell are independently greater than the length of the heating zone along the axial direction of the reaction shell.

[0024] The present utility model adjusts the lengths of the preheating zone, heating zone and cooling zone to ensure the full reaction and heat exchange utilization of the energy storage material, enabling the energy storage material to sequentially undergo preheating, high-temperature heating decomposition and cooling to complete the energy storage process.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] The utility model has a compact structure, low investment and high working efficiency. It uses a feeding mechanism for quantitative feeding, and a spiral feeding mechanism to push the energy storage material to flow inside the reaction shell, where it undergoes high-temperature decomposition and heat release in the heating zone. The cooling fan blows air in the reverse direction to cool the material in the cooling zone. Subsequently, the cooled energy storage material is discharged under the action of the discharging mechanism, and the cold air generated by the cooling fan is converted into hot air and blown towards the heating zone to carry the steam in the heating zone to the preheating zone to achieve the preheating function. Moreover, the hot air undergoes sufficient heat exchange with the newly fed material, increasing the temperature of the energy storage material in front of the heating zone, making full use of the heat inside the reaction shell, achieving multi-stage and inverse bidirectional utilization of energy, with an energy conversion rate of over 90%, enabling continuous production, having high comprehensive efficiency, being green and environmentally friendly, having no pollution and emissions during the energy storage process, and being able to dynamically and flexibly adjust the output of the energy storage material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a solid-state thermochemical energy storage device provided for a specific embodiment of the utility model.

[0028] Among them, 1-hopper; 2-feeding valve; 3-driving motor; 4-reaction shell; 5-spiral blade; 6-heating mechanism; 7-drop pipe; 8-gravity flap valve; 9-cooling fan; 10-vent pipe. SPECIFIC EMBODIMENTS

[0029] It should be understood that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0030] It should be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0031] The technical solution of the present utility model will be further described below in conjunction with the drawings and through specific embodiments.

[0032] In a specific embodiment, the present utility model provides a solid-state thermochemical energy storage device, such as Figure 1 shown, which includes a reaction housing 4. The reaction housing 4 includes a preheating zone, a heating zone, and a cooling zone arranged in sequence along the axial direction. A feeding mechanism and a screw feeding mechanism are provided at the inlet end of the preheating zone. The feeding mechanism is used to provide energy storage materials, and the screw feeding mechanism is used to sequentially transport the energy storage materials to the preheating zone, the heating zone, and the cooling zone. A heating mechanism 6 is arranged in the heating zone, and a cooling fan 9 is arranged at one end of the cooling zone far from the heating zone. The cooling fan 9 faces the heating zone, and a discharging mechanism is also arranged in the cooling zone.

[0033] During application, the present utility model uses the feeding mechanism for quantitative feeding, and the screw feeding mechanism is used to push the energy storage materials to flow inside the reaction housing 4, where they undergo endothermic decomposition in the heating zone. The cooling fan 9 is used to blow cold air in the reverse direction to cool the materials in the cooling zone. Subsequently, the cooled energy storage materials are discharged under the action of the discharging mechanism, and the cold air generated by the cooling fan 9 is converted into hot air and blown towards the heating zone to bring the steam in the heating zone to the preheating zone to achieve the preheating function, and the hot air undergoes sufficient heat exchange with the newly fed materials, thereby increasing the temperature of the energy storage materials in front of the heating zone.

[0034] The energy storage materials in the present utility model can decompose and release heat at high temperatures, and any energy storage materials well-known to those skilled in the art that can achieve the above functions can be used. For example, they can be calcium-based energy storage materials or magnesium-based energy storage materials, both of which are commercially available materials known in the art.

[0035] Taking calcium hydroxide as an example, the present utility model provides the following operation process of the solid-state thermochemical energy storage device: Start the heating mechanism 6 for heating, use the feeding mechanism to send calcium hydroxide into the reaction housing 4, and the screw feeding mechanism is used to push the energy storage materials to flow inside the reaction housing 4, where a decomposition reaction occurs in the heating zone, turning into water vapor and calcium oxide, and generating heat; the cooling fan 9 arranged in the cooling zone cools the reacted calcium oxide by blowing air, so that the calcium oxide is cooled down under the blowing of the cold air, and the cold air becomes hot air. The cooled calcium oxide is discharged from the reaction housing 4 through the discharging mechanism, and the hot air passes through the high-temperature zone, bringing the water vapor generated by the reaction of calcium hydroxide to the preheating zone on the feeding side to achieve the preheating function of the newly incoming energy storage materials. That is, on the one hand, the hot air takes out the water vapor generated by the reaction in the heating zone, and at the same time further increases the air temperature; on the other hand, in the preheating zone, the hot air and the newly incoming energy storage materials undergo sufficient heat exchange, increasing the temperature of the materials in front of the heating zone and reducing the air temperature, thus making the most of the heat.

[0036] In some embodiments, the heating mechanism 6 can be arranged on the outer peripheral wall of the reaction housing 4 corresponding to the heating zone, or can be arranged inside the reaction housing 4.

[0037] In some embodiments, the feeding mechanism includes a hopper 1, the hopper 1 is connected to the reaction housing 4, and a feeding valve 2 is further provided on the hopper 1. During application, the feeding valve 2 is opened and the feeding amount of the energy storage material is adjusted, thereby realizing the dynamic adjustment of the output of the energy storage material.

[0038] In some embodiments, the screw feeding mechanism includes a driving motor 3 and a screw blade 5. One end of the screw blade 5 is located inside the reaction housing 4 and extends to the cooling zone, and the other end of the screw blade 5 extends out of the reaction housing 4 and is drivingly connected to the driving motor 3. Specifically, the driving motor 3 is a variable-frequency motor. The screw blade 5 is a shaftless screw blade, that is, the screw feeding mechanism is shaftless screw drive. By turning on the driving motor 3 and driving the screw blade 5 through frequency conversion, the energy storage material is pushed towards the tail of the reaction housing 4, realizing continuous feeding, and the whole device operates stably with power matching, achieving continuous and energy-saving production.

[0039] In some embodiments, the discharging mechanism includes a blanking pipe 7, the blanking pipe 7 communicates with the reaction housing 4, and a gravity flap valve 8 is further provided at the outlet of the blanking pipe 7. Specifically, the end of the screw blade 5 in the cooling zone is located at the central part of the inlet of the blanking pipe 7. In the present utility model, air is supplied from the tail of the reaction housing 4 to realize the dual utilization of cold air cooling in the cooling zone and material preheating in the preheating zone, fully utilizing the heat, and discharging the cooled energy storage material into the blanking pipe 7. When the weight of the material in the blanking pipe 7 reaches the set threshold, the gravity flap valve 8 automatically opens to discharge the material from the reaction housing 4. Preferably, a vibration component is provided on the outer peripheral wall of the blanking pipe 7.

[0040] In some embodiments, an exhaust pipe 10 is further provided on the reaction housing 4, and the exhaust pipe 10 communicates with the preheating zone, for exhausting the air and water vapor in the reaction housing 4 to the atmosphere through the exhaust pipe 10, or collecting them after exhausting and recycling them.

[0041] In some embodiments, the linear length of the preheating zone along the axial direction of the reaction housing 4 and the linear length of the cooling zone along the axial direction of the reaction housing 4 are independently greater than the length of the heating zone along the axial direction of the reaction housing 4. By adjusting the lengths of the preheating zone, heating zone and cooling zone in the present utility model, the full reaction and heat exchange utilization of the energy storage material are ensured, so that the energy storage material sequentially undergoes preheating, high-temperature heating decomposition and cooling to complete the energy storage process.

[0042] The present utility model is based on the energy storage of chemical energy storage materials, conducts a continuous energy storage process, realizes the multi-level utilization of comprehensive energy such as cooling and heating, and utilizes the flow of the energy storage material for efficient heat exchange with a high specific surface area, without environmental pollution problems.

[0043] The applicant declares that the above description is only a specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model fall within the protection scope and the disclosure scope of the present utility model.

Claims

1. A solid-state thermochemical energy storage device, characterized in that, The solid-state thermochemical energy storage device includes a reaction shell, which includes a preheating zone, a heating zone and a cooling zone arranged in sequence along the axial direction. A feeding mechanism and a spiral feeding mechanism are arranged at the inlet end of the preheating zone. The feeding mechanism is used to provide energy storage materials, and the spiral feeding mechanism is used to transport the energy storage materials to the preheating zone, the heating zone and the cooling zone in sequence. A heating mechanism is arranged in the heating zone, and a cooling fan is arranged at one end of the cooling zone away from the heating zone. The cooling fan faces the heating zone, and the cooling zone is also provided with a discharging mechanism.

2. The solid-state thermochemical energy storage device according to claim 1, wherein The feeding mechanism comprises a hopper, the hopper is connected to the reaction shell, and a feeding valve is also arranged on the hopper.

3. The solid-state thermochemical energy storage device according to claim 1, wherein The spiral feeding mechanism comprises a driving motor and a spiral blade, one end of the spiral blade is located in the reaction shell and extends to the cooling zone, and the other end of the spiral blade extends out of the reaction shell and is transmission-connected to the driving motor.

4. The solid-state thermochemical energy storage device according to claim 3, characterized in that, The spiral blade is a shaftless spiral blade.

5. The solid-state thermochemical energy storage device according to claim 3, characterized in that, The driving motor is a variable frequency motor.

6. The solid-state thermochemical energy storage device according to claim 3, characterized in that, The discharging mechanism comprises a discharge pipe, the discharge pipe is connected to the reaction shell, and a gravity flap valve is further provided at the outlet of the discharge pipe.

7. The solid-state thermochemical energy storage device according to claim 6, characterized in that The outer peripheral wall of the drop pipe is provided with a vibrating component.

8. The solid-state thermochemical energy storage device according to claim 6, wherein The end of the spiral blade in the cooling zone is located at the inlet center of the blanking pipe.

9. The solid-state thermochemical energy storage device according to claim 1, wherein, The reaction shell is also provided with an exhaust pipe, which is connected to the preheating zone.

10. The solid-state thermochemical energy storage device according to claim 1, characterized in that, The linear length of the preheating zone along the axial direction of the reaction shell and the linear length of the cooling zone along the axial direction of the reaction shell are respectively and independently greater than the length of the heating zone along the axial direction of the reaction shell.

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