Exhaust gas treatment structure for lithium battery recycling system

Abstract

The utility model relates to a waste gas treatment structure of lithium battery recovery system, including a main fan, the main fan is connected with the exhaust pipe of the baking kiln through the air pipe, the air pipe is linked together with the gas inlet of lye washing tower, the gas outlet of lye washing tower links together with the gas inlet of first water washing tower, the gas outlet of first water washing tower links together with the gas inlet of second water washing tower, the gas outlet of second water washing tower links together with the heat medium import of heat exchanger, the heat medium export of heat exchanger links together with the air inlet pipe of cloth bag dust catcher, the cold medium import of heat exchanger links together with the cooling tower, the liquid outlet of lye washing tower, first water washing tower, second water washing tower links together with a drain pipe, and the water in the drain pipe is passed into the fluorine removal jar, and the filtered water of fluorine removal jar is sent into the sedimentation tank through the filter press, and the filtered water of sedimentation tank is sent into the clean water tank, and the waste water in fluorine removal jar and sedimentation tank is passed into the waste water tank. The utility model can avoid environmental pollution through multilayer filtration, water washing to gas and multichannel impurity removal and filtration to waste water.

Description

Technical Field

[0001] This utility model relates to the waste gas treatment structure of a lithium battery recycling system. Background Technology

[0002] With the rapid development of the new energy industry, a wave of lithium battery retirements is quietly approaching. How to efficiently and environmentally recycle the electrode materials from used batteries has become an urgent problem for the industry to solve.

[0003] Current lithium battery recycling systems use pyrolysis systems that directly roast the materials. However, these systems previously directly passed exhaust gas into a dust collector and discharged wastewater directly, which could easily lead to environmental pollution. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a waste gas treatment structure for a lithium battery recycling system that avoids environmental pollution.

[0005] The purpose of this utility model is achieved as follows: The exhaust gas treatment structure of the lithium battery recycling system includes a main fan connected to the exhaust pipe of the roasting kiln via a duct. This duct passes sequentially through a filter and an activated carbon adsorber before connecting to the inlet of an alkaline washing tower. The outlet of the alkaline washing tower is connected to the inlet of a first water washing tower, which in turn is connected to the inlet of a second water washing tower. The outlet of the second water washing tower is connected to the inlet of a heat exchanger, which is connected to the inlet of a bag filter. The inlet of the heat exchanger is connected to a cooling tower. The drain outlets of the alkaline washing tower, the first water washing tower, and the second water washing tower are all connected to a drain pipe. Water from the drain pipe flows into a defluorination tank. The filtered water from the defluorination tank is sent to a sedimentation tank via a filter press. The filtered water from the sedimentation tank is sent to a clear water tank. Wastewater from the defluorination tank and the sedimentation tank flows into a wastewater tank.

[0006] Compared with the prior art, the beneficial effects of this utility model are: Compared to the previous method of directly passing the exhaust gas into the dust collector and discharging the wastewater directly, the exhaust gas treatment structure of this utility model lithium battery recycling system can now perform multi-layer filtration and water washing, ensuring that the gas is fully filtered and the wastewater undergoes multiple impurity removal and filtration processes, thus avoiding environmental pollution. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the waste gas treatment structure of the lithium battery recycling system of this utility model.

[0008] The components include: 1. Main fan; 2. Filter; 3. Activated carbon adsorber; 4. Alkali washing tower; 5. First water washing tower; 6. Second water washing tower; 7. Heat exchanger; 8. Bag filter; 9. Cooling tower; 10. Drainage pipe; 11. Defluoridation tank; 12. Filter press; 13. Sedimentation tank; 14. Clean water tank; 15. Wastewater tank. Detailed Implementation

[0009] See Figure 1 This utility model relates to a waste gas treatment structure for a lithium battery recycling system. The waste gas treatment structure is connected to the outlet of the pyrolysis system of the lithium battery recycling system. It includes a main fan 1, which is connected to the exhaust pipe of the roasting kiln through a duct for treating waste gas. The duct passes through a filter 2 and an activated carbon adsorber 3 in sequence and is then connected to the inlet of an alkaline washing tower 4. The outlet of the alkaline washing tower 4 is connected to the inlet of a first water washing tower 5. The outlet of the first water washing tower 5 is connected to the inlet of a second water washing tower 6. The outlet of the second water washing tower 6 is connected to the inlet of the heat medium of a heat exchanger 7. The outlet of the heat medium of the heat exchanger 7 is connected to the inlet pipe of a bag filter 8. The inlet of the cold medium of the heat exchanger 7 is connected to a cooling tower 9.

[0010] The drain outlets of the alkaline washing tower 4, the first water washing tower 5, and the second water washing tower 6 are all connected to a drain pipe 10. The water in the drain pipe 10 flows into the defluorination tank 11. The filtered water from the defluorination tank 11 is sent to the sedimentation tank 13 through the filter press 12. The filtered water from the sedimentation tank 13 is sent to the clear water tank 14 for reuse. The wastewater from the defluorination tank 11 and the sedimentation tank 13 flows into the wastewater tank 15 for further treatment.

[0011] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A waste gas treatment structure for a lithium battery recycling system, characterized in that: It includes a main fan, which is connected to the exhaust pipe of the roasting kiln via a duct. This duct passes through a filter and an activated carbon adsorber in sequence, and then connects to the air inlet of the alkali washing tower. The air outlet of the alkali washing tower is connected to the air inlet of the first water washing tower, and the air outlet of the first water washing tower is connected to the air inlet of the second water washing tower. The air outlet of the second water washing tower is connected to the heat medium inlet of the heat exchanger. The heat medium outlet of the heat exchanger is connected to the air inlet pipe of the bag filter. The cold medium inlet of the heat exchanger is connected to the cooling water tower. The drain outlets of the alkali washing tower, the first water washing tower, and the second water washing tower are all connected to a drain pipe. The water in the drain pipe flows into the defluorination tank. The filtered water from the defluorination tank is sent to the sedimentation tank through a filter press. The filtered water from the sedimentation tank is sent to the clear water tank. The wastewater from the defluorination tank and the sedimentation tank flows into the wastewater tank.

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