Three-Stage Cyclic Concentration Technology Redefines NMP Treatment Standards – Pengjin Launches Next-Gen High-Tower System
Industry Pain Points Drive Technological Evolution
In lithium battery manufacturing and semiconductor industries, N-methylpyrrolidone (NMP) gas is difficult to treat as an exhaust gas. Traditional Towers struggle with concentration fluctuations , low packing efficiency, and high operational costs. Pengjin Technology’s ‘new three-stage cyclic tower system’ delivers dual breakthroughs in efficiency and stability through innovative engineering.
Core Technology: Graded Concentration Process Chain
System closure：Pure water → absorption → concentration stages
- Pure Water Layer (0-3% concentration)
- Top spray maintains exhaust concentration at 3-6ppm (surpassing China’s 10ppm standard).
- Smart sensors activate pneumatic valves for automatic overflow, eliminating manual control.
- Absorption Layer (3-30% concentration)
- Double layer packing distributor and gravity conveying piping allow for increased airflow area and absorption efficiency..
- Magnetic flap level gauges auto-balance liquid transfer between layers.
- Concentration Layer (30-80% concentration)
- Zoned storage design with pneumatic valve groups enables stepwise concentration.
- Perforated plate showers provide uniformity of distribution and reduced energy consumption.
Performance Leap
| Metric | New Tower | Conventional Tower |
| Concentration Stability | ≤±1ppm fluctuation | ±3ppm fluctuation |
| Maximum emissions | ≤6ppm | ≤10ppm |
| Absorbent layer reservoir location | Bottom of absorption tower | Middle of the absorption tower |
Competitive Edge: Full-Chain Technical Superiority
Pengjin’s modular process packages integrate smart controls with hardware innovations:
- Material Upgrade:304L stainless steel ,NMP corrosion resistance for extended life.
- Customised solutions: Scalable design (30,000-50,000 m³/h).
