Selection Principles of Filtration Wind Speed for Baghouse Dust Collectors

Filtration wind speed is a key parameter affecting baghouse dust removal efficiency, equipment resistance, and filter bag service life. 

It refers to the speed at which dusty gas passes through the filter bag surface, and its selection must align with dust characteristics and working conditions, following these core principles:

1. For fine dust (particle size ≤10μm, such as metal powder, cement dust): Control the wind speed at 0.6-1.0m/min. Fine dust easily penetrates filter bags; 

low wind speed ensures sufficient contact time for dust capture, avoiding efficiency loss.

2. For coarse dust (particle size ≥10μm, such as stone dust, coal dust): The wind speed can be increased to 1.0-1.5m/min. Coarse dust is easily captured by the filter bag surface, 

and higher wind speed improves processing capacity without significantly reducing efficiency.

3. For high-humidity and viscous dust (such as biomass boiler dust, chemical sludge dust): Appropriately reduce the wind speed to 0.5-0.8m/min. 

High humidity and viscosity cause dust to adhere to filter bags; low wind speed reduces dust adhesion and prevents blockage.

4. For high-abrasion dust (such as ore dust, sand dust): Control the wind speed at a low level (0.6-0.9m/min). High wind speed increases the impact force of dust on filter bags, accelerating wear;

 low wind speed reduces friction and extends bag life.

Note: The calculated wind speed should reserve a 10-15% margin to adapt to fluctuations in dust concentration and gas volume during actual operation.