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

1. 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.  

2. 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.  

3. 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

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).