Bag Filters

Bag Filters

Approx Price: Rs 1 Lakh / Piece 
Recovery of particulate matter from exhaust gas is vital for any industry from two aspects:

  • To avoid pollution problems
  • Recovery of finished product-increasing the plant yield

For recovering particulate matter different options available are - cyclones, venturi, scrubbers, bag air filter, pollution control bag filter, electrostatic precipitates etc. Out of these bag filter becomes the best choice if following are dominant selection criterias:

  • Material is expensive and hence high collection efficiency is desired.
  • Particulate size is very fine.

Material recovery in powder form is desirable & not in solution form.

Working Principle of Bag Filter :

  • The dust-laden air enters the bag filter.
  • The dust /powder separates inside the bag filter chamber.
  • The air is uniformly distributed avoiding channelling while the powder is separated.
  • Initially a coat of material forms on the bags. Subsequently, the coat acts as the filtering medium.
  • The dust is accumulated on filter elements while the air passes through the filter bags from outside to inside.
  • The accumulated powder is dislodged from the bags by reverse pulsejet air intermittently.
  • The dislodged powder falls on bottom cone and is discharged through powder discharge valves.
  • The dust free air is sucked by induced draft fan and is exhausted to atmosphere.

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