Air Cleaning Devices
• Dust Collectors
– Electrostatic precipitators
• Charged particles collected by electrical field
– Fabric collectors (e.g., filter)
• Trap particles as exhaust flows through a porous medium
– Dry centrifugal collectors (e.g., cyclone)
• Circular motion causes gas to move to the outer part
• Gaseous Contaminant Collectors
– Absorbers
• Transfer from gas to liquid
– Adsorbers
• Gas adheres to surface of porous solid material