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NMP Recycling System for Prismatic Cell Making

Wechat:17720812054

Whatsapp:+86 13174506016

Email:David@batterymaking.com

  • Item NO.:

    TMAX-YK-NMP-50000
  • Payment:

    L/C,T/T,Western Union, Paypal
  • Product Origin:

    China
  • Shipping Port:

    Xiamen
  • Lead Time:

    5 days
  • Certificate:

    CE ROHS Certificate
  • Product Detail

NMP Recycling System for Prismatic Cell Making


Chapter I Equipment Introduction

1NMP Working principle of recovery system

NMP recovery system uses the physical characteristics of NMP and adopts multi-stage condensation to fully condense and realize recovery. The temperature of the waste gas discharged from the coater is about 120 ℃. The temperature can be reduced to about 25 ℃ through the recovery system, which can cool and recover more than 95% of NMP.

2System characteristics

2.1The effect is good, and the solvent recovery can reach more than 95%; The purity of recovered NMP waste liquid reaches more than 80%;

2.2Energy saving. The energy consumption of the system itself is only 4.0kw/h (taking 50000m3/h air volume and air duct length less than 20m as an example). So far, it is the equipment with the lowest power consumption in all NMP recovery systems, and the product is recommended by the national environmental protection department;

2.3Long term stability: the NMP recovery system produced by our company can ensure that its performance (recovery rate, recovery concentration) will not be reduced within 3 years, and its stability will reach the best state;

2.4The safety performance is good. The equipment has special fault handling settings. Even if there is a sudden fault, there will be no backflow, suffocation and other accidents that affect the normal operation of the coater.

 

3Technical requirement

Item

Unit

Specification

1)Exhaust air volume

m3/h

50000Exhaust air volume of coater

2)Air outlet temperature

120℃

3) NMP consumption

kg/h

Above 45

2NMP Technical requirements for recycling

 

 

1)rate of recovery

 

≥95%

2) Recovery concentration

 

≥80%

3) NMP exhaust emission concentration after recovery

PPM

Below 200

3Material of auxiliary facilities

 

 

1)Ventilation duct

 

White iron pipe

300mmx300mmx0.0.6mm

 

4Process performance requirements

SN

Item

Specification

1

Energy saving performance

Use tube fin heat exchanger to save energy consumption.

2

Sealing performance

All connections in the unit are sealed with high-temperature silica gel and high-temperature glue. The air leakage rate at the connection of each functional section is less than 0.5%.

3

Linkage performance

Linked with the coater separately, the unit can operate under the best working conditions, and the recovered NMP concentration is more stable.

4

Others

After the equipment stops running, NMP cannot flow back to the air inlet pipe, and when the NMP recovery system fails, it will not affect the use of the coater.


Chapter II System Design

1Design parameters

Exhaust temperature120℃

Treatment air volume50000m3/h

Rate of recovery≥95%

Concentration of recovered waste liquid≥ 80%

Exhaust emission concentrationBelow 200 ppm

2Technological process

The process flow chart is as follows:

 

3Process description

3.1Heat exchange treatment

The temperature from the coater is about 120 ℃. After heat exchange, the waste gas of about 100 ℃ enters the NMP condenser to realize condensation and recovery of NMP.

3.2Equipment size

The size of the main retractor is2200mm x 1650mm x 2100mm L*W*H);

Size of cooling water towerBase diameter1200mm, Height1900mm;  

Reservoir size1400mm x 1200mm x6000mm(L*W*H

(Note: subject to actual production); The total weight is about 1.2 tons, and the operating weight is about 3.0 tons.

The air duct of the recovery equipment adopts white iron leather pipe with the size of300mm x300mm x 0.6mmThickness)。The connection between the pipe section and the pipe section is sealed with high-temperature silica gel.

PPR pipe is adopted for water pipe

3.4Layout plan of recycling system


3.5Recovery process pipeline diagram


3.6 Air duct installation layout diagram

 


4、Main equipment of the system

SN

Organization name

Part name

Material

Specification

Manufacturer

1

Cooling solvent recovery section

(condenser)

Cooling coil 1

Aluminum wing & copper tube

XYZ-500-6

TMAX

2

Cooling coil 2

Aluminum wing & copper tube

XYZ-500-8

TMAX

3

 

 

 

TMAX

4

 

 

 

TMAX

5

Liquid blocking plate

Corrosion resistant stainless steel

 

TMAX

6

Effusion disk

Corrosion resistant stainless steel

 

TMAX

7

Recovery tank

Corrosion resistant stainless steel

 

TMAX

8

Liquid level pump

Anticorrosive materials

 

Xiaoyezi

9

Forced draft fan section

Manual air valve

Anticorrosive materials

 

Xiaoyezi

10

Centrifugal fan

Anticorrosive materials

7KW

Xinfeng

11

Water cooling circulation section

cooling tower

 

20T

Liangyuan

12

water circulating pump

 

2P

Chinese Trumpet Vine

13

 

 

 

 

 

 

 

5Electrical design

5.1 electrical part (function and implementation mode)

Schneider air switch, AC contactor and thermal relay are adopted; Electric regulating air valve; Chint phase sequence protection relay and time relay.

5.2 Safety Control

(1) Design automatic control system and interlocking system, equipped with temperature alarm.

(2) NMP waste liquid transmission adopts the intelligent mode of liquid level detection and alarm. The liquid storage tank is placed on the roof, and the anti-corrosion aluminum-plastic pipe is connected to the place designated by the customer. The liquid level detection is used in the liquid storage tank, and the alarm is realized when the liquid level reaches the specified height. The alarm small electric box device is placed at the head position of the coater and the waste liquid filling position respectively, and then the waste liquid on the roof is transported to the downstairs filling barrel through the manual valve at the filling position.


 


              

   

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