ZJRH Series Rotary NMP Recovery Unit

Application：

The equipment is suitable for recovery of NMP organic solvent recovery in lithium battery manufacturing which can help users to achieve standard discharge and resource recovery. The device has simple structure, and obtain green and safe discharge without any changes to the existing production which eliminates environmental worries, reduces waste and saves energy.

Product principle：

Solvent recovery: we use the primary cooling recovery device (heat exchanger, cooling water cooler, chilled water cooler) to condense part of NMP from the air, and after the single-stage NMP adsorption rotor, the concentration of NMP organic solvent in exhaust air can be reduced to below 8ppm (1ppm NMP discharge concentration can be achieved by two-stage NMP adsorption rotor). After the exhaust gas is concentrated to a certain level, the NMP can be condensed and recovered by the freezing method.

Product Composition：

The unit is composed of heat exchanger, cooler, surface cooler, fan, adsorption rotor and rotor reactivation system.

Product Features：

● Control mode: PLC, DDC control and coordinated control system; Highly  automatic control, each recovery device is designed with automatic control system and interlocking system, which ensure the safe production and stable operation of the coating machine and the recovery device.

● High-efficiency centrifugal fan, heat-resistant double-layer panel, stainless steel frame, electrical multiple protection for safe operation.

● With obvious energy saving effect, as the system is closed and circulated, processed air will be sent back to the coater oven through heat exchanger, which greatly reduced energy consumption.

● NMP solvent recovery rate ≥ 97%, solvent recovery concentration ≥ 85%, exhaust NMP concentration ≤ 1ppm

Advantages:

1. Relative humidity of purified air to be circulated to coating machine is ≤2%RH

2. 90% of purified air is circulated in the system to reduce power consumption

3. NMP content in discharge air is ≤1ppm

4. NMP solvent recovery rate reach 99%

5. Concentration of recovered NMP solvent ≥85%

6. Heat exchange efficiency reach 75% and temperature of the air to be circulated after the heat exchanger over 90℃

Technical parameters for reference: