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Integrated 4000 m³/h NMP Solvent Recovery System with Smart Control
The NMP recovery system utilizes the miscibility of NMP and water to treat and recover the exhaust gas from the coating machine. It has full automation to ensure consistent and safe operations at all times. Its three-stage spray absorption design ensures that the exhaust emissions are far below the national emission threshold.
The system integrates key components including ventilation ducts, recovery towers, pump components, blowers, NMP storage tanks, and centralized control systems. With outstanding features such as high recovery efficiency, low operating costs, space saving, stylish design, and reliable performance, it seamlessly adapts to various environments and installation layouts. It is particularly suitable for coating processes on multiple lithium-ion battery production lines.
1. Air Treatment Capacity: 4000 m³/h
Compliance Standard: GB 30484-2013 Emission Standard of Pollutants for Battery Industry – Total Non-Methane Hydrocarbons.
2. Main Unit Color: SUS gray.
3. Functional Modules Overview:
|
No. |
Module |
Description |
|
1 |
Recovery Tower |
Recovers NMP gas via water spray absorption and ensures compliant emissions. |
|
2 |
Pump Group |
Circulates water and discharges liquid inside the recovery tower. |
|
3 |
Blower |
Delivers air to the recovery tower and maintains positive pressure in the coater. |
|
4 |
Storage Tank |
Stores recovered NMP waste liquid. |
|
5 |
Control System |
Automates control with the coater to maintain stable oven and exhaust concentrations. |
4. Delivery List:
|
No. |
Equipment Name |
Model |
Qty |
Remarks |
|
1 |
Recovery Tower |
KAT-GT-4000FL |
1 set |
SUS304 |
|
2 |
Blower |
3KW |
1 unit |
Intelligent frequency control |
|
3 |
Control Panel |
NMP4K-1 |
1 set |
Local + remote control |
|
4 |
Water Pump |
1.5KW |
3 units |
Chemical pipeline pump |
|
5 |
Storage Tank |
2m³ |
1 unit |
SUS201 |
|
6 |
Discharge Pump |
0.35KW |
1 unit |
Corrosion-resistant pump |
5. Main Components of the 4000 Air Volume NMP Recovery System:
|
No. |
Component |
Specification |
Qty |
Material/Remarks |
|
1 |
Tower Body |
∅1.0m × H2.2m |
3 pcs |
SUS304 |
|
2 |
Corrugated Packing |
φ1.0m×20mm×3 layers×0.3mm |
3 sets |
SUS304 |
|
3 |
Wire Mesh Packing |
φ1.0m × 20mm |
1 set |
SUS304 |
|
4 |
Water Pump |
1.5KW |
3 pcs |
Internal tank pump |
|
5 |
Online Concentration Monitor |
CM-800α |
1 set |
SZ |
|
6 |
Exhaust Fan |
3KW |
1 set |
Guangzhou XinFeng |
|
7 |
Frequency Converter |
3KW |
1 set |
V&T |
|
8 |
Electrical Control Cabinet |
- |
1 set |
Q235, outdoor cabinet |
|
9 |
Liquid Circulation Pipes |
- |
1 set |
SUS304 |
|
10 |
Storage Tank |
2m³ |
1 set |
SUS201 |
|
11 |
Liquid Level Alarm |
- |
1 set |
KAT |
|
12 |
Discharge Pump |
0.35KW |
1 unit |
Corrosion-resistant pump |
IV. Design Basis and Reference Standards
1.Conforms to applicable national, industry, and local regulations, as well as client requirements. Treated emissions meet all legal and contractual requirements.
2.Uses energy-efficient and user-friendly processing methods to achieve low energy consumption, minimal investment, compact footprint, and convenient operation.
3.All equipment, components, and electrical parts are sourced from well-known and reliable brands.
4.No secondary pollution is generated during construction or operation phases.
V. Technical Parameters
|
Parameter |
Value |
|
Recovery System Model |
KAT-GT-4000FL |
|
Max Exhaust Handling Volume |
4000 m³/h |
|
Tower Size |
∅1.0m × H3.0m |
|
Power Supply |
400V / 3 Phase / 50Hz |
|
Installed Power |
7.5KW (4.5KW pumps + 3KW fan) |
|
Operating Weight |
2 tons |
|
Floor Load Requirement |
500 KG/m² |
|
Recovery Efficiency |
≥99.6% |
|
Recovered NMP Concentration |
Adjustable between 80% and 90% |
|
Tail Gas Emission Concentration |
<2 mg/m³ |
|
Soft Water Consumption |
≤0.05 m³/h |
|
Equipment Footprint |
7m (L) × 2m (W) |
1. Process Diagram: (For reference only)
2. Installation Render: (For reference only)
1. Pure water is used to absorb and recover NMP from exhaust gases. Waste gas enters from the bottom of the tower and passes through the gas adsorption unit, where NMP dissolves into water and water vapor. The treated exhaust then passes through a gas-liquid separator and a top rinsing unit to ensure complete NMP absorption. Due to the high temperature of incoming gases, partial water evaporation occurs during the heat exchange process. A circulation pump is used to recirculate the tower liquid, facilitating efficient heat recovery, reducing water waste, and increasing the concentration of recovered NMP liquid. After treatment, the exhaust can be directly released without further purification, achieving near-zero emissions.
2. Tower Structure:
The tower consists of three major zones:
Spray Heat Exchange Zone: Enables rapid mass transfer between NMP-laden gas and water via direct contact. This mixing-based heat exchange method avoids the resistance caused by heat transfer walls and scaling, ensuring efficient energy exchange.
Mass Transfer Separation Zone: Utilizes high-efficiency structured packing for gas-liquid contact, allowing counter-current flow and efficient NMP absorption through a 140Y specific surface area filler.
Demisting Zone (White Smoke Removal):
Lower demister: Droplets collide with demister packing and are collected. Baffle plates create turbulent airflow, allowing droplets to be captured by inertia.
Upper demister: Airflow passes through blades forming a spiral, throwing droplets outward into the overflow groove. Demisting efficiency reaches 90%–99%.
|
No. |
Component |
Brand |
Qty |
Remarks |
|
1 |
Electrical Components |
Chint |
1 set |
|
|
2 |
Frequency Converter |
V&T |
1 set |
|
|
3 |
NMP Liquid Sensor |
Local |
1 set |
With lens cleaning system |
|
4 |
Valves |
Local |
1 set |
|
2. Control System Description:
|
No. |
Item |
Specification |
|
1 |
Main Control Panel |
Independent outdoor cabinet, remote start/stop from coater |
|
2 |
Operation Modes |
Manual, automatic, emergency stop, and remote control |
|
3 |
Waste Liquid Monitoring |
Display and adjustable concentration settings |
|
4 |
Alarms |
Sound-light alarm at coater head and buzzer in outdoor cabinet |
|
5 |
Safety Protections |
Over-temperature alarms and power-off protection included |
Contact: Lily You
Phone: +86 18650702009
Tel: +86 18650702009
Email: saleskatbattery@gmail.com
Add: No. 988 Xiahe Road, Siming District, Xiamen City
919121614
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