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Air-Conditioning,
Ventilation & Air Pollution Control System |
Dust Collectors
Dust Collectors are available in 3
types
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Fabric/Bag Filter
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Cyclone Separator
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Wet Collector
Fabric/Bag Filter
Fabric/Bag Filters are specially used for
collecting minute dust particles. It removes particulate from carrier
air/gas streams by interception, impaction and diffusion mechanisms.
The dust which is filtered from the air/gas
streams collects on the outside of the bags. It is then removed from the
bags by manual/mechanical shaking or pulse jet cleaning. The fabric filter
bags are made of acrylic, polyester needle felt, polypropylene nylon,
terrylene, antistatic, etc. depending upon requirement. Compact Bag Filter
are also available mounted on wheels for single point dust extraction or
frequently relocated dust producing operation.
Cyclone Separator
Cyclone Separator are normally used for the
collection of the coarse dust particles or as a precleaner to more
efficient dust collectors.
The dusty air is introduced at the top of a
cyclone through the inlet pipe located tangentially to the cylindrical
portion. The gases then move downwards in a whirling motion, forming a
peripheral vortex and giving rise to centrifugal forces, resulting in a
throwing of the dust particles towards the walls, which then move
downwards into the hopper and are removed.
Wet Collector
Wet Collectors are specially used for
collecting minute dust particles and also for scrubbing obnoxious fumes
(Medium pressure venturi scrubber).
The dusty air enters the inlet chambers and
then passes through the venturi section. The water level being higher than
the venturi section the dusty air bubbles through waterforms tiny water
droplets trapping the dust particles into agglomerates. The larger
agglomerates sink whereas the smaller particles are entrained in the water
droplets, which are removed while passing the baffles. |