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INTRODUCTION
Pneumatic
conveying is a system used to transport a wide variety of dry powdered
and granular materials in a gas stream. Generally the gas stream will
be air but in special cases dried, cooled, heated air or inert gas such
as Nitrogen may be used. In its basic form, the product (solids) is
fed into a moving air stream which blows the material down a length
of pipe. The pipe is connected to a receiver or cyclone where the air
and product are separated
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A pneumatic conveying system comprises
of four distinct parts:
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The Prime Mover - a blower, fan, compressor, exhauster or vacuum
pump to provide the necessary means to create a flow of gas and
the conveying air stream.
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The Feeder - a rotary valve, venturi, screw, blow vessel or feeder
to introduce the solids into the air stream under controlled conditions.
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The conveying line - pipework comprising straight, horizontal and
vertical sections, bends, branches and diverter valves.
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Separator - a cyclone, receiver, filter receiver or silo/vessel
to separate the air from the solids
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