Industrial Centrifugal Fan Selection for Wet Scrubber Exhaust Systems
An industrial centrifugal fan for wet scrubber exhaust systems provides the negative pressure needed to pull contaminated gas through ductwork, spray towers, demisters, and discharge stacks. Correct fan selection should consider airflow, pressure loss, gas moisture, corrosion risk, material selection, and drainage design.
Wet scrubber applications are common in chemical plants, surface treatment workshops, VOC pre-treatment systems, acid mist removal, odor treatment, and environmental engineering projects. Compared with clean-air ventilation, scrubber exhaust fans require closer review of corrosion, condensate, and system resistance.
Typical Applications
- Wet scrubber exhaust systems
- Spray tower and packed tower exhaust
- Acid mist and alkaline gas treatment
- VOC exhaust pre-treatment
- Chemical workshop ventilation
- Surface treatment and plating line exhaust
Selection Parameters
- Required airflow at operating condition
- Total pressure including duct, scrubber, demister, stack, and damper loss
- Gas composition, concentration, humidity, and temperature
- Corrosion risk and recommended material
- Condensate drainage and inspection requirement
- Motor voltage, frequency, protection grade, and explosion-proof requirement
- Fan inlet and outlet direction
- Indoor or outdoor installation layout
Material Options
Common options include carbon steel with coating, stainless steel, FRP, and special anti-corrosion lining. Material should be selected according to gas composition, pH value, temperature, concentration, and maintenance environment.
Related Reading
- Scrubber Exhaust Fan for VOC and Acid Mist Treatment Systems
- FRP Exhaust Fan vs Stainless Steel Fan for Corrosive Gas
- Industrial Exhaust Fan for Activated Carbon VOC Treatment
FAQ
Can a normal carbon steel fan be used after a wet scrubber?
Only when gas corrosion and condensate risk are low and coating is suitable. For acid mist or corrosive gas, stainless steel, FRP, or lining should be reviewed.
What pressure data is needed?
Please provide scrubber pressure drop, duct length, elbow quantity, demister loss, stack height, damper loss, and required airflow.
Does wet gas require drainage?
Yes. Condensate and liquid carryover should be considered in casing design, drain port, inspection door, and installation slope.
