NMP raw materials are generally stored in steel drums, sealed storage, according to the requirements of production operation procedures, NMP tank lid should be immediately after draining, so NMP storage and empty tank storage under normal circumstances will not produce disorganized emissions. It can be seen from the analysis of the process flow that the main raw materials used for mixing positive slurry contain NMP, and the residual slurry attached to the mixing tank will be filtered with the cleaning water through multiple filter nets with different mesh numbers. The filtered material, namely the slurry containing NMP, can be recovered, and the filtered water from the washing tank will be disposed of in the sewage treatment station.
NMP exhaust gas mainly comes from the coating drying section in the preparation of lithium ion battery positive electrode. The drying process adopts vacuum drying process, and the baking equipment is closed and negative pressure air extraction. In the coating drying process, NMP as a solvent only has a small amount of volatilization at the entrance and exit of the coating machine. Using the physical property of high boiling point of NMP, a fan is equipped at one end of the device to collect the waste NMP gas and recycle it by condensation. According to the analogic investigation and material analysis, the treatment efficiency of NMP waste gas condensation recovery device is about 80~90%. After condensation treatment, the concentration of NMP waste gas may be higher than the emission requirement of 50 mg/m³ in the Emission Standard of Battery Industry Pollutants. Therefore, By adding activated carbon adsorption recovery device to treat NMP waste gas on the basis of condensation recovery, the recovery and treatment efficiency of NMP waste gas can reach more than 99%, and the emission of NMP waste gas can not only meet the emission standards but also improve the level of clean production of enterprises.
|
Chemical Name |
Abbreviation |
CAS NO. |
|
1, 4-Butanediol |
BDO |
110-63-4 |
|
1,4-Butyrolactone |
GBL |
96-48-0 |
|
Tetrahydrofuran |
THF |
109-99-9 |
|
1-Methyl-2-pyrrolidinone |
NMP |
872-50-4 |
|
Methylene Chloride |
MC |
75-09-2 |
|
Aniline oil |
Aniline |
62-53-3 |
|
Cyclohexylamine |
CHA |
108-91-8 |
|
Dimethylformamide |
DMF |
68-12-2 |
|
Dimethylacetamide |
DMAC |
127-19-5 |
|
Dicyclohexylamine |
DCHA |
101-83-7 |
|
Adipic acid |
AA |
124-04-9 |
|
Melamine |
Melamine |
108-78-1 |
|
N-Tertiarybutyl-2-benzothiazole sulfenamide |
TBBS(NS) |
95-31-8 |
|
2-Mercaptobenzothiazole |
MBT（M） |
149-30-4 |
|
N-Cylcohexyl-2-benzothiazole-sulfenamide |
CBS(CZ) |
95-33-0 |
|
Dibenzothiazole Disulfide |
MBTS(DM) |
120-78-5 |
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