A, dry mixing, mixing, ingredients in the process of dust.
Manually add powder, and pour the powdery raw materials into the dry mixer/dispersant/mixer from the feed inlet. In this process, a small amount of dust will be raised, and a bag filter will be set up (the dust removal efficiency can reach 95%), and the dust will be collected and treated and discharged at high altitude.
Bag filter is a dry dust filter. Suitable for collecting fine, dry and non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt, and uses the filtering function of fiber fabric to filter dusty gas. When the dusty gas enters the bag filter, the dust with large particles and heavy proportion settles down and falls into the ash hopper. When the gas containing fine dust passes through the filter material, the dust is trapped and the gas is purified. The dust removal efficiency of bag filter can reach above 99%.
Second, the gluing process
The use of sealant in the process will produce a small amount of organic waste gas, the main component of which is non-methane total hydrocarbons. We can collect the organic waste gas in the painting process, then treat it with activated carbon adsorption device and discharge it at high altitude. After collection and treatment, the emission concentration of non-methane total hydrocarbons can reach the emission limit of lithium ion/lithium battery in the Emission Standard of Pollutants for Battery Industry (GB30484-20 13) and the emission limit of air pollutants, and the unorganized emission can reach the Emission Standard of Pollutants for Battery Industry (GB30484-20 13).
When graphite emulsion is used in this project, a small amount of organic waste gas (characterized by VOCs) will be generated. In this project, the graphite emulsion spraying process is set in a closed workshop, and the generated organic waste gas is collected by a gas collecting device, introduced into a biological trickling filter tower and an activated carbon adsorption device for treatment, and then discharged at high altitude (the treatment efficiency can reach 95%). The waste gas is discharged through the exhaust pipe after being treated to meet the standard.
Fourth, the welding process
A small amount of metal dust will be produced during welding. If the amount of metal dust is small, it can be discharged in an unorganized form. By strengthening the mechanical ventilation in the workshop, the concentration at the boundary of the factory can reach the Discharge Standard for Pollutants in Battery Industry (GB30484-20 13), which has little impact on the surrounding atmospheric environment.
5. Anode coating, drying and liquid injection.
The use of NMP in the shaking of lithium battery cathode slurry will produce a small amount of organic waste gas, the main component of which is non-methane total hydrocarbons. The coating and drying processes are planned to be set in a closed workshop, and a NMP recovery system is set on the anode coating line. The NMP waste gas volatilized during coating, drying and vacuumizing is connected to a three-stage condensation recovery device through pipelines for condensation recovery, and the recovered non-methane total hydrocarbons are further processed. A small amount of electrolyte waste gas is produced in the process of lithium battery liquid injection, and its main component is non-methane total hydrocarbons. The spraying process is set in a closed workshop, and the coating waste gas and spraying waste gas can be treated by the device of "biological trickling filtration+activated carbon adsorption" (the treatment efficiency can reach 95%).