Dust Extraction System consists of Suction hoods, ducting, Bag filter with rotary valve & Centrifugal fan. A suction hood captures dust at dust generation point and same will transported through ducting to a Bag filter/Dust collector. A Bag filter/Dust collector removes the dust from the air and dust discharges through rotary valve. Centrifugal fan used to provide necessary exhaust volume & pressure.
1. “Nuisance” venting of conveyors, transfer points, packing stations and so on — this dust is often sent to waste.
2. “Product collection” venting of classifiers, crushers, storage bins, air (pneumatic) conveying systems, mills, and flash dryers. This dust is often recovered because it has value.
3. “Process gas filtration” venting of spray dryers, kilns, power boilers, reactors and so on. The collected solids may or may not be returned to the process.
Design Standard : ACGIH (American Conference of Governmental Industrial Hygienists)