Dust
Collection
Dust collection minimizes air particle contamination in workshops,
plants and manufacturing facilities. Particles are released from
material processing in nearly every fabrication industry, from large
wood shaving particles or metal shaving particles to fine, respirable
chemicals and smoke particles. Air particles released during
manufacturing processes are hazardous to both worker and equipment
health, quickly leading to a number of problems if particles are not
removed from facility air.
Dust collection addresses this problem of air contamination
by drawing contaminated air into a collection apparatus, trapping harmful
particles and releasing cleaner air into the atmosphere or back onto the work
floor. Applications requiring dust collection include sanding, sawing, or
grinding almost anything, metalworking, toxic media, product recovery, scrap
metal recycling, chemical processing and steel sintering. Dust collection is a
vital process for coal handling, cement fabrication, metal fabrication, mining,
chemical processing, woodworking, recycling and agricultural industries, among
many others. State OSHA regulations require industries with smoke-, dust-, or
particle-emitting processes to comply with clean air standards for their workplaces,
and environmental regulations limit acceptable outdoor emissions. As the dust
collection industry advances, smaller and more efficient filtering equipment is
being developed to meet increasingly strict occupational safety and
environmental regulations.
Different types of dust collectors can be used in dust collection systems including bag
houses, cyclone dust collectors, jet dust collectors, and portable dust collectors. Baghouses, the
most common dust collector design, draw dirty air in through ducts to a
hopper-shaped baghouse containing fabric filters bags. A large blower creates a
vacuum that draws the air from the facility into the collection chamber and
then through the fabric bags, leaving behind the dust, smoke and particles; the
clean air exits through the fan at the outlet, while dust particles settle into
an airlock at the bottom of the hopper. Similarly, jet dust collectors are a
type of baghouse that use jets of reversed air to shake the dust-caked fabric
bag filters free of dirt. Cyclone dust collectors are inertial separators which
use centrifugal air movement within a hopper-shaped chamber to separate
particles from the air; the heavier particles hit the outer wall of the hopper
and gravity brings them down to the bottom of the hopper, where they are
collected. Portable dust collectors, which generally use fabric or cartridge
filters, can be moved around to various workstations for localized dust
collection. Wet dust collectors are special dust collection devices that can
capture both solid particulate and gaseous impurities in the air using chemical
reactions and absorption techniques, and are often used to collect flammable
metal dusts like magnesium, aluminum or titanium.
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Dust Collection - Ultra-Flow Inc.
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