Centrifugal Fans in Waste Gas Treatment: Key Roles and Selection Tips
- Addtime: 2025-11-11 / View: 28
Waste gas treatment systems (chemical plants, refineries) depend on centrifugal fans for waste gas treatment to capture, filter, and release pollutants safely. Unlike standard fans, industrial centrifugal fans for this sector need specialized features to handle corrosive, high-particulate gases and meet regulations. Here’s their key role and how to select the right one.
Core Roles of Centrifugal Fans in Waste Gas Treatment
- Gas Capture: VOCs treatment centrifugal fans create negative pressure to suck toxic fumes into scrubbers/incinerators. Without enough suction, gases leak—risking fines.
- Filter Pressurization: High-pressure centrifugal fans push gases through carbon/HEPA filters. Their static pressure (3–8 inWG) overcomes filter resistance, ensuring steady airflow.
- Stack Discharge: waste gas centrifugal fans push treated gases through stacks at ≥15 m/s, meeting emission rules.
Selection Tips for Waste Gas Centrifugal Fans
1. Corrosion Resistance Is a Must
Waste gases (sulfur dioxide, ammonia) damage standard steel. Choose corrosion-resistant centrifugal fans made of 316 stainless steel—ideal for mild to moderate corrosive environments. A Texas chemical plant upgraded from standard steel to 316 stainless steel centrifugal fans, extending equipment life from 18 months to 5 years.
2. Match Static Pressure to System
Under-sizing pressure ruins filtration. Calculate TSP (duct + scrubber resistance). A system with 20ft ducts + 2 scrubbers needs 5 inWG—pick a static pressure centrifugal fan rated 6 inWG (10% buffer).
3. Explosion-Proof for Hazardous Gases
For flammable gases (methane), use ATEX-certified centrifugal fans (sealed motors, non-sparking impellers) to avoid ignition.
Why Standard Fans Fail
Standard industrial centrifugal fans lack corrosion resistance/pressure for waste gas use. A food plant used a standard fan for ammonia treatment—impeller rusted in 6 months, causing $8k in repairs and shutdowns.
Conclusion
Centrifugal fans for waste gas treatment are vital for compliance. Focus on corrosion resistance (like 316 stainless steel), pressure matching, and safety certifications to avoid downtime. Need help? Contact us for a custom waste gas fan assessment.
