Battery dismantling exhaust gas treatment device

Abstract

This utility model relates to the field of environmental protection technology and discloses a battery dismantling waste gas treatment device, including multiple washing tanks and multiple gas tanks. A bottom plate and a top plate are fixed to the bottom and top of each washing tank, respectively. A gas guide box is fixed to the upper surface of the bottom plate, and multiple one-way valves are fixed to the upper surface of the gas guide box. A bubble refiner tube is fixed to the top of each one-way valve, and a positioning plate is fitted onto the surface of each bubble refiner tube. A first air pump and a second air pump are fixed to the upper surface of the top plate. A first gas guide pipe is fixedly connected between the inlet end of the second air pump and the top plate, and a second gas guide pipe is fixedly connected between the output end of the second air pump and the gas tanks. A third gas guide pipe is fixedly connected between the gas tanks and the top plate. This utility model achieves waste gas recycling treatment, ensuring that the discharged gas meets the harmful gas emission standards.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, and in particular to a battery dismantling waste gas treatment device. Background Technology

[0002] When dismantling waste batteries, many batteries (such as lithium-ion batteries) contain organic solvents, such as carbonates (e.g., ethylene carbonate, dimethyl carbonate, etc.). During dismantling, these organic solvents may volatilize into the air, forming organic waste gases, or the battery electrolyte may decompose under heat or mechanical action, producing harmful gases. For example, the lithium hexafluorophosphate (LiPF6) electrolyte in lithium-ion batteries decomposes at high temperatures or when reacting with water, generating harmful gases such as hydrofluoric acid (HF) and phosphorus pentafluoride (PF5). These gaseous harmful substances easily diffuse into the air and are inhaled by humans, seriously affecting human health. Furthermore, these harmful gases also harm the environment. Therefore, it is necessary to treat the harmful gases generated during battery dismantling, and a battery dismantling waste gas treatment device has been designed for this purpose. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this utility model is to propose a battery dismantling exhaust gas treatment device to achieve the recycling and treatment of exhaust gas, ensuring that the emitted gas meets the emission standards for harmful gases.

[0004] The battery dismantling waste gas treatment device proposed in this utility model includes multiple washing tanks and multiple gas tanks. A bottom plate and a top plate are fixed to the bottom and top of the washing tanks, respectively. A gas guide box is fixed to the upper surface of the bottom plate. Multiple one-way valves are fixed to the upper surface of the gas guide box. A bubble refining tube is fixed to the top of each one-way valve. A positioning plate is fixed to the surface of the bubble refining tubes. A first air pump and a second air pump are fixed to the upper surface of the top plate. A first gas guide pipe is fixedly connected between the air inlet end of the second air pump and the top plate. A second gas guide pipe is fixedly connected between the output end of the second air pump and the gas tank. A third gas guide pipe is fixedly connected between the gas tank and the top plate. A fourth gas guide pipe is fixedly connected between the washing tanks. A return gas structure is fixed between the gas tanks. A third air pump is provided on one side of the washing tank at the first end. An air inlet pipe is fixedly connected between the output end of the third air pump and the gas guide box. An air outlet pipe is fixed to the side wall of the washing tank at the end.

[0005] Preferably, the return gas structure includes multiple branch pipes, a main pipe, and a fourth pump, and a first electrically controlled valve is fixed on the surface of each branch pipe.

[0006] Preferably, a second electrically controlled valve is fixed to the surface of the third air guide pipe, and a third electrically controlled valve is fixed to the surface of the fourth air guide pipe and the air outlet pipe.

[0007] Preferably, a return outlet pipe is fixed between the first air pump and the air guide box, and a return inlet pipe is fixed at the input end of the first air pump. The return inlet pipe passes through the top plate and extends into the washing tank.

[0008] Preferably, the interior of the washing tank is fixed with a mounting plate, and the surface of the mounting plate is provided with multiple mounting holes, and the bubble refining tube is sealed and fixed to the mounting holes one by one.

[0009] Preferably, a reagent guide tube is fixed to the lower surface of the kit plate, and a sealing sleeve is threaded onto the end of the reagent guide tube away from the kit plate.

[0010] The beneficial effects of this utility model are: by arranging gas tanks and a return gas structure, the non-compliant gas is recovered, and the non-compliant gas is recirculated and treated using a first gas pump, so that the waste gas is completely treated and meets the standards before being discharged. This battery dismantling waste gas treatment device is environmentally friendly and reliable. In addition, multiple bubble refiners are arranged in an array in the washing tank to break the waste gas into small bubbles, increasing the contact area between the waste gas and the washing reagent in the washing tank, thereby improving the washing effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the battery dismantling waste gas treatment device proposed in this utility model.

[0012] Figure 2 This is a top view of the overall structure of the battery dismantling waste gas treatment device proposed in this utility model.

[0013] Figure 3 This is a cross-sectional view of the washing tank of the battery dismantling waste gas treatment device proposed in this utility model.

[0014] Figure 4 This is a schematic diagram of the base plate installation structure of the battery dismantling waste gas treatment device proposed in this utility model.

[0015] In the diagram: 1. Washing box; 2. Gas tank; 3. Base plate; 4. Top plate; 5. Gas guide box; 6. One-way valve; 7. Bubble refiner tube; 8. Positioning plate; 9. First air pump; 91. Return outlet pipe; 92. Return inlet pipe; 10. Second air pump; 101. First gas guide pipe; 102. Second gas guide pipe; 11. Third gas guide pipe; 12. Fourth gas guide pipe; 13. Gas return structure; 131. Branch pipe; 132. Main pipe; 133. Fourth pump; 14. Third air pump; 15. Inlet pipe; 16. Outlet pipe; 17. Set plate; 18. Reagent guide tube. Detailed Implementation

[0016] Reference Figure 1-4The battery dismantling exhaust gas treatment device includes multiple washing tanks 1 and multiple gas tanks 2. A bottom plate 3 and a top plate 4 are fixed to the bottom and top of each washing tank 1, respectively. A gas guide box 5 is fixed to the upper surface of the bottom plate 3, and multiple one-way valves 6 are fixed to the upper surface of the gas guide box 5. Each one-way valve 6 has a bubble refining tube 7 fixed to its top. The bubble refining tube 7 is made by opening multiple small air holes on the surface of a conventional pipe. These small air holes disperse the bubbles, causing the exhaust gas to be broken down into small bubbles, which then react with the reagents in the washing tank 1, improving the exhaust gas washing effect. A positioning plate 8 is fixedly fitted onto the surface of the bubble refining tube 7. A first air pump 9 and a second air pump 10 are fixed to the upper surface of the top plate 4. When the first air pump 9 and the second air pump 10 are not working, the pipeline is sealed. If a poorly sealed air pump is used, an electronically controlled valve needs to be installed on the corresponding pipeline surface to control the pipeline's on / off state. A first air guide pipe 101 is fixedly connected between the air inlet end of the second air pump 10 and the top plate 4. The output end of the second air pump 10... A second air guide pipe 102 is fixedly connected to the gas tank 2, a third air guide pipe 11 is fixedly connected to the top plate 4, a fourth air guide pipe 12 is fixedly connected to the washing tank 1, and a return air structure 13 is fixedly connected between the gas tanks 2. A third air pump 14 is installed on one side of the washing tank 1 at the first end. An air inlet pipe 15 is fixedly connected between the output end of the third air pump 14 and the air guide box 5. The air inlet end of the third air pump 14 is fixedly connected to the exhaust end of the dust filter device. The dust filter device adopts existing technology to perform preliminary filtration of the exhaust gas generated by battery dismantling. Specifically, a bag filter can be used to separate particulate matter in the exhaust gas. The filtered gas is then introduced into this device for further exhaust gas treatment. An exhaust pipe 16 is fixedly installed on the side wall of the washing tank 1 at the end. A detection device is also arranged at the position of the exhaust pipe 16 to detect whether the content of harmful substances in the exhaust gas meets the standards. A gas chromatograph can be used for real-time detection. The gas chromatograph and the bag filter are existing technologies and will not be described in detail here.

[0017] The return gas structure 13 includes multiple branch pipes 131, a main pipe 132, and a fourth pump 133. Each branch pipe 131 has a first electrically controlled valve fixed to its surface. Each branch pipe 131 is fixed to one end of the gas tank 2 and connected to the gas tank 2. Except for the branch pipe 131 connected to the end gas tank 2, the other branch pipes 131 are fixed to and connected to the main pipe 132. The branch pipe 131 connected to the end gas tank 2 and the main pipe 132 are respectively connected to the fourth pump. The branch pipe 131 connected to the end gas tank 2 is connected to the input end of the fourth pump, and the main pipe 132 is connected to the output end of the fourth pump. When the return gas structure 13 is working, the fourth pump pressurizes the gas and opens the first electrically controlled valve on the surface of the corresponding branch pipe 131, so that gas is introduced from the end gas tank 2 into the gas tank 2 in the front position.

[0018] The surface of the third air guide pipe 11 is fixed with a second electric control valve. The third air guide pipe 11 connects the gas tank 2 and the washing tank 1. There is no need to set up a pressurization device to guide the air. When the pressure inside the gas tank 2 is less than the pressure inside the washing tank 1, no gas is discharged from the gas tank 2. There is no need to worry about the exhaust gas entering the air. When the pressure inside the gas tank 2 is greater than the pressure inside the washing tank 1, the gas inside the gas tank 2 enters the washing tank 1. Then, the first air pump 9 works to drive the gas backflow for treatment. The surface of the fourth air guide pipe 12 and the air outlet pipe 16 is fixed with a third electric control valve.

[0019] A return pipe 91 is fixed between the first air pump 9 and the air guide box 5. A return inlet pipe 92 is fixed at the input end of the first air pump 9. The return inlet pipe 92 passes through the top plate 4 and extends into the washing tank 1.

[0020] The interior of the washing tank 1 is fixed with a mounting plate 17. The surface of the mounting plate 17 has multiple mounting holes, and the bubble refiner tube 7 is sealed and fixed in one-to-one correspondence with the mounting holes.

[0021] A reagent guide tube 18 is fixed to the lower surface of the mounting plate 17. A sealing sleeve is threaded onto the end of the reagent guide tube 18 furthest from the mounting plate 17. The reagent guide tube 18 allows for the filling and discharge of washing reagents within the washing tank 1. The discharged reagents can be collected in a waste liquid tank via a pipeline. (Refer to...) Figure 1 This embodiment includes three washing tanks 1 for holding different washing reagents. Calcium hydroxide can be used to treat acidic waste gases such as hydrogen fluoride and hydrogen chloride, ethyl acetate can be used to treat VOCs waste gases, and sodium hydroxide can be used to treat sulfuric acid mist waste gases. Different types of batteries produce different waste gases during dismantling, so different numbers of washing tanks and washing reagents can be configured according to the actual situation. The amount of washing reagent can be adjusted according to the waste gas treatment effect (it cannot be filled to the brim; space must be reserved for gas loading). In actual operation, the number of washing tanks 1 needs to be adjusted according to the type of battery being dismantled to hold different types and quantities of washing reagents in order to achieve the target waste gas treatment effect.

[0022] In addition to the above structure, it also includes a terminal controller for controlling the operation of each air pump and valve.

[0023] When using this device, first remove the sealing sleeve on the surface of the reagent guide tube 18, and use the reagent guide tube 18 to pass the corresponding washing reagent into the corresponding washing tank 1. Fix the exhaust pipe of the dust filter device to the air inlet of the third air pump 14. The exhaust gas generated by battery dismantling first passes through the dust filter device to remove dust and separate particulate matter from the exhaust gas. Start the third air pump 14 and pass the exhaust gas after filtering particulate matter through the third air pump 14 and the air inlet pipe 15 into the air guide box 5. At this time, the first air pump 9 does not work and no air is guided in the return outlet pipe 91. The exhaust gas passes through the one-way valve from the air guide box 5 and enters the bubble refiner tube 7. The exhaust gas is dispersed by the small air holes on the surface of the bubble refiner tube 7 to form microbubbles. When the bubbles rise, they react with the washing reagent contained in the washing tank 1 to achieve the effect of exhaust gas treatment. The bubbles rise and pass above the liquid surface of the washing reagent and converge again to complete the first treatment of the exhaust gas. The content of one or more harmful substances in the exhaust gas is reduced.

[0024] Open all the third electric control valves, and the exhaust gas enters the next scrubbing tank 1. The scrubbing reagent contained in the scrubbing tank 1 further reduces the content of one or more other harmful substances in the exhaust gas. The specific treatment process is the same until the exhaust gas passes through the last scrubbing tank 1 and is discharged from the exhaust pipe 16. At this time, the exhaust gas can be detected in real time using detection equipment.

[0025] When a harmful substance in the exhaust gas exceeds the standard, the third electrically controlled valve on the surface of the exhaust pipe 16 is closed, controlling the second air pump 10 at the top of the end washing tank 1 to work, so that the exhaust gas is introduced into the gas tank 2 from the first air guide pipe 101 and the second air guide pipe 102. Then, the gas is introduced into the gas tank 2 corresponding to the washing tank 1 that treats the harmful gas or into the pre-position gas tank 2 by the return gas structure 13, so that the gas is treated again. When treating again, the second electrically controlled valve on the surface of the third air guide pipe 11 is opened, and the gas is introduced into the washing tank 1 from the gas tank 2. The first air pump 9 works, pressurizing the gas above the washing reagent in the washing tank 1 and guiding it into the air guide box 5. Then, the one-way valve and the bubble refiner tube 7 separate the return gas for further treatment. The fine bubbles come into contact with the washing reagent. Except for the second air pump 10 at the end, the second air pumps 10 installed on the surface of the other washing tanks can draw the exhaust gas into the gas tank 2 for temporary storage during the second treatment to prevent excessive local accumulation. After the second treatment is completed, the gas discharged from the exhaust pipe 16 meets the standard.

Claims

1. A battery disassembly waste gas treatment device, characterized in that: The device includes multiple washing tanks and multiple air tanks. A bottom plate and a top plate are fixed to the bottom and top of each washing tank, respectively. An air guide box is fixed to the upper surface of the bottom plate, and multiple one-way valves are fixed to the upper surface of the air guide box. Each one-way valve has a bubble refining tube fixed to its top, and a positioning plate is fitted onto the surface of each bubble refining tube. A first air pump and a second air pump are fixed to the upper surface of the top plate. A first air guide pipe is fixedly connected between the air inlet of the second air pump and the top plate. A second air guide pipe is fixedly connected between the output of the second air pump and the air tanks. A third air guide pipe is fixedly connected between the air tanks and the top plate. A fourth air guide pipe is fixedly connected between the washing tanks. A return air structure is fixed between the air tanks. A third air pump is located on one side of the first washing tank, and an air inlet pipe is fixedly connected between the output of the third air pump and the air guide box. An air outlet pipe is fixed to the side wall of the last washing tank.

2. The battery dismantling waste gas treatment device according to claim 1, characterized in that: The return gas structure includes multiple branch pipes, a main pipe, and a fourth pump. Each branch pipe has a first electrically controlled valve fixed to its surface.

3. The battery dismantling waste gas treatment device according to claim 1, characterized in that: The surface of the third air guide pipe is fixed with a second electrically controlled valve, and the surface of the fourth air guide pipe and the air outlet pipe is fixed with a third electrically controlled valve.

4. The battery dismantling waste gas treatment device according to claim 1, characterized in that: A return outlet pipe is fixed between the first air pump and the air guide box, and a return inlet pipe is fixed at the input end of the first air pump. The return inlet pipe passes through the top plate and extends into the washing tank.

5. The battery dismantling waste gas treatment device according to claim 1, characterized in that: The washing tank is equipped with a mounting plate inside each of the washing tanks. The surface of the mounting plate has multiple mounting holes, and the bubble refining tubes are sealed and fixed to each of the mounting holes.

6. The battery dismantling waste gas treatment device according to claim 5, characterized in that: A reagent guide tube is fixed to the lower surface of the kit plate, and a sealing sleeve is threaded onto the end of the reagent guide tube away from the kit plate.

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