NMP (N-Methyl-2-pyrrolidone) Recovery Methods
1. Absorption Method
Utilizes NMP’s hydrophilicity to absorb it from exhaust gas using scrubbers and water.
Simple but yields NMP with a purity of around 80%.
2. Cooling Condensation Method
Cools exhaust gases to condense and recover NMP in liquid form.
Uses heat exchangers and condensers, reducing water content and energy consumption.
3. Membrane Separation Method
Uses polyamide reverse osmosis membranes to separate NMP from wastewater.
Highly efficient and cost-effective, reducing pollutant concentrations in discharged water.
4. Dry Recovery System
Utilizes waste heat recovery and rotor concentration technology to achieve high-purity NMP recovery.
Has an efficiency of over 98% and requires minimal installation space.
5. NMP Purification System
Removes water and impurities from recovered NMP to enhance its purity, making it reusable.
Each method is chosen based on process requirements, cost efficiency, and environmental regulations, ensuring sustainability in battery manufacturing.