A gas circulation system for a battery all-in-one machine
By constructing a gas circulation system and utilizing components such as cyclone dust collectors, bag filters, SDG acid adsorption components, and semiconductor cooling chips, the problems of environmental pollution and increased energy consumption in exhaust gas treatment have been solved, achieving safe and reliable exhaust gas circulation and energy recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI ATOMIC INNOVATION ENERGY CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-24
AI Technical Summary
Existing exhaust gas treatment methods pose environmental pollution and safety hazards, and the recirculation of exhaust gas to the drying chamber for reheating increases energy consumption.
A gas circulation system is adopted, including components such as cyclone dust collector, bag dust collector, SDG acid adsorption component, semiconductor refrigeration chip, large temperature difference module, condenser and electric heater, to construct a gas circulation pipeline for exhaust gas treatment and energy recovery, so as to achieve safe and reliable exhaust gas treatment and energy consumption reduction.
It achieves safe and reliable treatment of exhaust gas, reduces energy consumption, avoids environmental pollution, and improves the efficiency and safety of exhaust gas recycling.
Smart Images
Figure CN224552010U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery recycling technology, specifically a gas circulation system for an integrated battery crushing machine. Background Technology
[0002] With the rapid development of new energy vehicles globally, the demand for lithium-ion batteries has surged, bringing with it the problem of recycling and disposing of a large number of used lithium batteries. The battery crushing industry has emerged to address this need, aiming to recover valuable metals such as lithium, cobalt, nickel, manganese, copper, and aluminum through physical, chemical, or metallurgical methods, thereby reducing environmental pollution and achieving resource recycling.
[0003] Lithium battery crushing machines are commonly used in battery recycling. Under the protection of inert nitrogen gas, these machines crush batteries while they are still charged and dry the electrolyte. The dried solids are transformed from hazardous waste into general solid waste, significantly reducing the difficulty, cost, and risk of storage and transportation. However, the electrolyte gas produced during drying contains a large amount of harmful substances, requiring purification before emission. For example, as described in Chinese Patent Publication No. CN112902591B, entitled "A Lithium Battery Material Drying Device and Its Usage Method," the gas discharged from the exhaust end of the drying chamber is treated by condensation and adsorption before being released into the atmosphere. This achieves both electrolyte recovery and purification of the exhaust gas released into the atmosphere.
[0004] As mentioned above, existing exhaust gas treatment methods are all simple adsorption and condensation processes, which often lead to the following problems: First, basic exhaust gas treatment methods inevitably result in the exhaust gas still containing unpurified harmful substances, posing a certain degree of environmental pollution and safety hazards. Second, even if the pre-treated exhaust gas is reintroduced into the drying chamber for secondary treatment, the condensation process itself, followed by reheating, significantly increases the drying chamber's energy consumption. Ensuring the safety and reliability of the exhaust gas treatment process without excessively increasing energy consumption is a pressing issue that needs to be addressed. Utility Model Content
[0005] In order to avoid and overcome the technical problems existing in the prior art, this utility model provides a gas circulation system for an integrated battery crushing machine, which can not only safely and reliably handle the exhaust gas generated during the drying process, but also does not excessively increase the energy consumption in the exhaust gas treatment process.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A gas circulation system for an integrated battery crushing machine includes a gas circulation pipeline connecting the exhaust end and return end of the crushing and drying machine. Along the exhaust gas conveying direction, the gas circulation pipeline is sequentially arranged an exhaust gas treatment module, a heat source side of a heat exchanger, a condensation recovery module, a cold source side of a heat exchanger, and a condenser. It also includes a large temperature difference module with a cooling end and a heating end, wherein the cooling end is connected to the condensation recovery module, and the heating end is connected to the condenser.
[0008] As a further embodiment of this utility model: the large temperature difference module is a semiconductor refrigeration chip, with the heating end and the cooling end respectively formed on both sides of the semiconductor refrigeration chip.
[0009] As a further embodiment of this utility model: the exhaust gas treatment module includes a cyclone dust collector, a bag dust collector and an SDG acid adsorption component arranged sequentially along the exhaust gas conveying direction on the gas circulation pipeline.
[0010] As a further improvement of this utility model: the condensation recovery module includes a primary condensation component and a secondary condensation component arranged sequentially along the exhaust gas conveying direction on the circulation pipeline, and the drain ends of the primary condensation component and the secondary condensation component are both connected to the recovery tank.
[0011] As a further improvement of this utility model, an activated carbon adsorption module is installed at the exhaust end of the condensation recovery module on the gas circulation pipeline.
[0012] As a further improvement of this utility model, a circulating fan is installed at the exhaust end of the activated carbon adsorption module on the gas circulation pipeline.
[0013] As a further improvement of this utility model, an electric heater is installed on the gas circulation pipeline at the exhaust end of the condenser.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. Based on traditional methods of condensate recovery and exhaust gas treatment, this invention utilizes a gas circulation pipeline to reintroduce the treated exhaust gas into the return end of the crusher-dryer. This not only ensures the discharge of liquid generated during drying from the crusher-dryer but also safely and reliably treats the exhaust gas produced during the drying process. Furthermore, the gas circulation pipeline of this application is equipped with a heat exchanger and a condenser. The heat exchanger recovers heat energy from the crusher-dryer, and the condenser recovers heat from the heating end of the large temperature difference module. This reduces heat energy waste and effectively increases the gas temperature circulating to the return end of the crusher-dryer, thereby reducing the energy consumption for reheating the exhaust gas in the drying chamber.
[0016] 2. Using semiconductor cooling chips as the large temperature difference module eliminates the need for mechanical components such as compressors, pumps, and valves, resulting in a small size and no vibration or noise during use; at the same time, it eliminates the need for refrigerant, ensuring safety and eliminating the risk of leakage.
[0017] 3. The exhaust gas treatment module includes a cyclone dust collector, a bag filter, and an SDG acid adsorption component arranged sequentially along the gas circulation pipeline in the exhaust gas conveying direction. These components sequentially achieve the removal of large particles, small particles, and acidic pollutants, reducing the need for subsequent processing of the electrolyte recovered by the condensation recovery module.
[0018] 4. An activated carbon adsorption module is installed at the exhaust end of the condensation recovery module on the gas circulation pipeline for dehumidification and adsorption of some residual harmful substances.
[0019] 5. The circulating fan is installed at the exhaust end of the activated carbon adsorption module on the body circulation pipeline. At this installation location, the exhaust gas has already passed through the dust removal and acid removal of the exhaust gas treatment module, the cooling of the condensation recovery module, and the dehumidification of the activated carbon adsorption module before entering the circulating fan, effectively preventing damage to the circulating fan in a humid and corrosive environment.
[0020] 6. An electric heater is installed on the gas circulation pipeline at the exhaust end of the condenser to further heat the exhaust gas circulating to the return end of the crusher and dryer. This ensures that the exhaust gas at the return end of the crusher and dryer has the same temperature as the exhaust gas at the exhaust end, thus avoiding uneven drying caused by excessive temperature changes inside the crusher and dryer. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model.
[0022] In the diagram: 10. Crushing and drying machine; 20. Exhaust gas treatment module; 21. Cyclone dust collector; 22. Bag dust collector; 23. SDG acid adsorption component; 30. Heat exchanger; 40. Condensation recovery module; 41. Primary condensation component; 42. Secondary condensation component; 43. Recovery tank; 50. Activated carbon adsorption module; 60. Circulating fan; 70. Large temperature difference module; 80. Condenser; 90. Electric heater. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] For ease of understanding, the specific structure and working method of this utility model are further described below with reference to the accompanying drawings:
[0025] The specific structure of this utility model is as follows: Figure 1 As shown, its main structure includes a gas circulation pipeline connecting the exhaust end and return end of the crusher-dryer 10. Along the exhaust gas conveying direction, the gas circulation pipeline is sequentially equipped with an exhaust gas treatment module 20, a heat exchanger 30 (heat source side), a condensation recovery module 40, a heat exchanger 30 (cold source side), and a condenser 80. It also includes a large temperature difference module 70 with both a cooling end and a heating end, with the cooling end connected to the condensation recovery module 40 and the heating end connected to the condenser 80. In this application, based on the traditional method of recovering condensate from the exhaust gas and directly discharging the treated exhaust gas into the atmosphere, a gas circulation pipeline is used to reintroduce the exhaust gas into the return end of the crusher-dryer 10 for circulation. This method safely and reliably treats the exhaust gas generated during the drying process while simultaneously discharging the condensate. Furthermore, a heat exchanger 30 is installed on the heat source side between the exhaust gas treatment module 20 and the condensation recovery module 40 in the gas circulation pipeline to absorb and store the heat energy of the exhaust gas before condensation treatment. Simultaneously, after condensation treatment in the condensation recovery module 40, the exhaust gas re-enters the cold source side of the heat exchanger 30. This re-absorbs and utilizes the heat from the heat source side of the heat exchanger 30, while also reducing the temperature of the exhaust gas before entering the condensation recovery module 40. This achieves partial heat recovery from the exhaust gas while also reducing the energy consumption of the condensation recovery module 40. In addition, in this application, the condensation recovery module 40 is cooled by the cooling end of the large temperature difference module 70, and the heating end of the large temperature difference module 70 is connected to the condenser 80 to reheat the exhaust gas that has been initially heated by the cold source side of the heat exchanger 30 in the condenser 80. This not only further improves energy utilization but also achieves heat dissipation from the heating end of the large temperature difference module 70. That is, this application utilizes the heat exchanger 30 to recover heat energy from the crusher-dryer 10 and the condenser 80 to recover heat from the heating end of the large temperature difference module 70, thereby reducing the waste of heat energy and effectively increasing the gas temperature circulating to the return end of the crusher-dryer 10 through the gas circulation pipeline, thus reducing the energy consumption of reheating the exhaust gas in the drying box.
[0026] Specifically, the large temperature difference module 70 is a semiconductor refrigeration chip, with its two sides forming the heating end and cooling end, respectively. In practical implementation, the large temperature difference device can also use compressor refrigeration or utilize the adsorption / desorption of refrigerants (such as silica gel, zeolite, activated carbon) on refrigerants (such as water, methanol, ammonia) to drive the refrigeration cycle. This application uses a semiconductor refrigeration chip as the large temperature difference module 70, eliminating the need for mechanical components such as compressors, pumps, and valves. This results in a small size and noiseless operation; furthermore, it eliminates the need for refrigerants, ensuring safety and eliminating the risk of leakage.
[0027] Based on the above, such as Figure 1As shown, the exhaust gas treatment module 20 includes a cyclone dust collector 21, a bag filter 22, and an SDG acid adsorption assembly 23 arranged sequentially along the gas circulation pipeline in the exhaust gas conveying direction. These components sequentially achieve the removal of large particles, small particles, and acidic pollutants, reducing the need for subsequent processing of the electrolyte recovered by the condensate recovery module 40. Specifically, the cyclone dust collector 21, the bag filter 22, and the SDG acid adsorption assembly 23 (such as an SDG adsorption box) are all common gas dust removal and acid removal methods in the prior art; their specific working principles will not be elaborated here.
[0028] Based on the above, such as Figure 1 As shown, the condensation recovery module 40 includes a primary condensation component 41 and a secondary condensation component 42 arranged sequentially along the exhaust gas conveying direction on the circulation pipeline. The drain ends of both the primary condensation component 41 and the secondary condensation component 42 are connected to the recovery tank 43. The secondary condensation method of the primary condensation component 41 and the secondary condensation component 42 ensures the electrolyte recovery effect. Specifically, the primary condensation component 41 and the secondary condensation component 42 adopt common condensation dehumidification methods in the prior art, such as a condenser cylinder with an inlet and an outlet. The condenser cylinder is connected to the cooling end of the large temperature difference module 70, so that the high-temperature gas is cooled and condensed into liquid when passing through the inner cavity of the condenser cylinder, and then collected through the condenser cylinder; the detailed structure is prior art and will not be described here.
[0029] In addition, such as Figure 1 As shown, an activated carbon adsorption module 50 is installed at the exhaust end of the condensation recovery module 40 on the gas circulation pipeline for dehumidification and adsorption of some residual harmful substances. The activated carbon adsorption module 50 is a common gas treatment structure in the prior art. Its main principle is to arrange activated carbon in the gas flow pipeline for adsorption. The specific details of the structure will not be described here.
[0030] Based on the above, such as Figure 1 As shown, a circulating fan 60 is installed at the exhaust end of the activated carbon adsorption module 50 on the gas circulation pipeline. At this installation location, the exhaust gas passes through the exhaust gas treatment module 20 for dust and acid removal, the condensation recovery module 40 for cooling, and the activated carbon adsorption module 50 for dehumidification. This ensures that the exhaust gas passing through the circulating fan 60 is low-temperature dry and free of impurities, effectively preventing damage to the circulating fan 60 in a humid and corrosive environment.
[0031] Based on the above, such as Figure 1As shown, an electric heater 90 is installed on the gas circulation pipeline at the exhaust end of the condenser 80. This heater further heats the exhaust gas circulating to the return end of the crusher-dryer 10, ensuring that the exhaust gas at the return end and the exhaust end of the crusher-dryer 10 have the same temperature. This prevents uneven drying caused by excessive temperature fluctuations within the crusher-dryer 10. The electric heater 90 can be either a resistance wire heater or a combustion heater, as long as it can raise the gas temperature.
[0032] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0034] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.
Claims
1. A gas circulation system for an integrated battery crushing machine, characterized in that, It includes a gas circulation pipeline connecting the exhaust end and return end of the crusher (10). Along the exhaust gas conveying direction, the gas circulation pipeline is provided with an exhaust gas treatment module (20), a heat source side of a heat exchanger (30), a condensation recovery module (40), a cold source side of a heat exchanger (30), and a condenser (80). It also includes a large temperature difference module (70) with a cooling end and a heating end, wherein the cooling end is connected to the condensation recovery module (40), and the heating end is connected to the condenser (80).
2. The gas circulation system for an integrated battery crushing machine according to claim 1, characterized in that, The large temperature difference module (70) is a semiconductor refrigeration chip, with the heating end and the cooling end respectively on both sides of the semiconductor refrigeration chip.
3. A gas circulation system for an integrated battery crushing machine according to claim 1 or 2, characterized in that, The exhaust gas treatment module (20) includes a cyclone dust collector (21), a bag dust collector (22), and an SDG acid adsorption component (23) arranged sequentially along the exhaust gas conveying direction on the gas circulation pipeline.
4. A gas circulation system for an integrated battery crushing machine according to claim 1 or 2, characterized in that, The condensation recovery module (40) includes a primary condensation component (41) and a secondary condensation component (42) arranged sequentially along the exhaust gas conveying direction on the circulation pipeline. The drain ends of the primary condensation component (41) and the secondary condensation component (42) are both connected to the recovery tank (43).
5. A gas circulation system for an integrated battery crushing machine according to claim 1 or 2, characterized in that, An activated carbon adsorption module (50) is installed at the exhaust end of the condensation recovery module (40) on the gas circulation pipeline.
6. A gas circulation system for an integrated battery crushing machine according to claim 5, characterized in that, A circulating fan (60) is installed at the exhaust end of the activated carbon adsorption module (50) on the gas circulation pipeline.
7. A gas circulation system for an integrated battery crushing machine according to claim 1 or 2, characterized in that, An electric heater (90) is installed on the gas circulation pipeline at the exhaust end of the condenser (80).