kiln flue gas fan

Kiln flue gas fans draw hot combustion gases from rotary kilns, tunnel kilns, or precalciner systems. They maintain the necessary draft to sustain stable combustion and expel gases to scrubbers or heat exchangers.

Flow rates span 20,000 to 200,000 CFM at static pressures up to 8 kPa. Impellers are fabricated from high-temperature, corrosion-resistant alloys to withstand acid dew-point and particulate abrasion.

Variable frequency drives (VFDs) provide draft control, adjusting speed based on differential pressure across the kiln shell and duct stack to optimize fuel efficiency and prevent backflow.

Maintenance features include split-casing for blade access, external lubrication, and vibration monitoring. Kiln flue gas fans are critical for emissions compliance and energy recovery in cement and lime plants.