Air separation can be accomplished with several different types of
equipment. Some applications do not require air separation, such that
the scrap exits from the exhaust of a venturi system directly into a bin
or container of some kind.
When the type of scrap and application permits, a customer can use
an inexpensive "relief head" air separator. The relief head can be box
type, straight duct or an elbow. A relief head is perforated steel enabling
easy exit of air from the scrap while the scrap falls into a collection container.
A relief head is normally used with venturi systems and can have as many inlets
as required to deliver scrap to a collector.
Another
type of air separator is the cyclone. The cyclone is a conically
shaped device, with air emanating from the top of the cyclone.
The scrap is directed down the cone and out the exit at the
bottom of the cone. This type of air separator has been used
in almost every type of application.
Lastly,
there is a "slant screen" separator. The slant screen separator
is the most recent advance in air separator design. This separator
has the advantage of being considerably smaller in size for
the same amount of air volume being processed as a cyclone.
The slant screen separator is defined by its name. The scrap
enters the box-like separator and strikes the bottom of an
angled perforated screen mounted inside the separator housing.
By gravity, the scrap drops into the scrap receptacle, while
the air goes through the perforated screen and out the back
of the separator. That air can then be filtered and recycled
back to the plant or left to mix in with the atmosphere.
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