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NMP wastewater treatment
NMP, that is N-Methyl pyrrolidone, with low toxicity, high boiling point, strong dissolve capacity, nonflammable, biodegradable and recycling features, it was used in lithium battery, medicine, pesticide, pigment, detergent, insulating material etc
Describe
Working principle
Feature
Parameter
Sources of industrial wastewater

 
NMP, that is N-Methyl pyrrolidone, with low toxicity, high boiling point, strong dissolve capacity, nonflammable, biodegradable and recycling features, it was used in lithium battery, medicine, pesticide, pigment, detergent, insulating material etc. industries widely. NMP, as an important auxiliary material of anode of lithium battery, the usage amount increased greatly with the development of lithium battery industry in recent years, also as an expensive solvent if without recycling efficiently, that is not only waste source and harm to environment.
 
For example, quality of wastewater contained with NMP from one company as flows:
NMP content: 12.65wt%
PH: 10
NMP output per year: 1500t/y
We designed five-stage counter-current extraction technology to treat it, after treatment, NMP content in the wastewater down to 0.12wt%, and NMP recovery reached above 999%.
 

Customization or not: Yes
If supply small test or pilot-plant test: Yes
Centrifugal Extractor Working Pinciple:
1.Mixing and mass transfer process:
Light and heavy liquor enter in the annulus mixed zone proportionally and from two different feed pipe orifice respectively, which formed by bowl and shell, with the help of bowl’s rotation, the two phases through turbine disc and impeller mixing and dispersing quickly, after mass transfer completely, to finish mass transfer process.
 
2.Two phases separation process
With the eddy-current disc help, mixture enter in bowl, at the compartment formed by board, the mixture is quickly synchronized with the bowl, under the action of centrifugal force, the larger density liquor moving away from the bowl center to the wall gradually in the upward flow; and the small density liquor doing the opposite, after clarification, two liquids enter into collection chamber with their own weir plate respectively, and drawn out by tigella, to finish the separation process.
Extractor advantages:
  Separation effect is obvious and large handling capacity;

  Short contact time, to save extraction agent.

  High mass transfer and stage efficiency, convenient to start up or stop, it can not break balance when stop.

  Cover small area, low comprehensive invest.

  High adaptability, high flexibility, it could batch operation, single operation, continuous and counter current operation, there is no need to add stage pump.

Centrifugal Extractor Specification:
 

Model 

 Bowl diameter
(mm)

Mixture flux(l/h)

Pipe diameter
(mm)

Power(kw)

Dimension(mm)

Weight(kg)

CWL-25-M

25

10

φ10

0.18

270*200*760

10

CWL-50-M

50

50

DN20

0.18

400*400*800

18

CWL-150-M

150

1000

DN40

0.75

620*630*1150

120

CWL-250-M

250

3000

DN50

0.75-2.5

750*750*1400

460

CWL-350-M

350

8000

DN65

1.5-4

950*950*1688

680

CWL-450-M

450

15000

DN80

3-5.5

1000*1000*1800

880

CWL-550-M

550

30000

DN100

4.-7.5

1200*1200*1760

1100

CWL-650-M

650

60000

DN150

4-7.5

1350*1350*1960

1800

CWL-850-M

850

150000

DN200

7.5-15

1500*1500*2100

22

1. Equipment material will be chosen according to the feed physico-chemical property, common used SS304/316L/904L, common composite material, fluoride material and so on;
2. Above table is general parameter, real device has a little difference, please refer to the matched technological manual;
3. Above flux is under ideal condition, ratio of oil and water is their flux sum when 1:1.

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