A leading polysilicon manufacturer in Inner Mongolia needed a reliable solution to treat nitrogen oxide (NOx) exhaust from their new 7.5GW production line. Key challenges included:
1. Complex gas composition with hard-to-treat NO components
2. Stringent local emission limits (≤50 ppm NOx)
3. Extreme winter temperatures down to -30°C
4. Need for long-term, low-maintenance operation
Chaori Environmental designed a customized multi-stage wet scrubbing system leveraging our proprietary tower internals and intelligent control logic. The solution features:
1. Patented gas-liquid contact technology for enhanced reaction efficiency (Patent No.: CN207102283U, CN207562656U)
2. Climate-adapted design with integrated freeze protection for reliable cold-weather operation
3. Smart dosing and monitoring system for consistent compliance and optimized chemical usage
4. Corrosion-resistant FRP construction engineered for 15+ years service life
The system was engineered to exceed regulatory requirements:
1. NOx removal efficiency: ≥95% (designed)
2. Stable operation verified at -30°C ambient
3. Fully compliant with GB16297-1996 Class II + local 50 ppm standard
4. Low maintenance design with automated controls
This project demonstrates Chaori's ability to deliver engineered certainty for complex industrial exhaust challenges. We don't just supply equipment—we design solutions that anticipate process variability, adapt to environmental extremes, and optimize total cost of ownership.
Our NOx abatement expertise has been deployed across 10+ polysilicon and PV facilities in Inner Mongolia, Jiangsu, Anhui, and Qinghai, with capacities ranging from 5,000 to 120,000 m³/h.
