Drying and gas or vapor contact with solids – Process – With fluid current conveying or suspension of treated material
Patent
1998-09-18
2000-12-05
Wilson, Pamela
Drying and gas or vapor contact with solids
Process
With fluid current conveying or suspension of treated material
34408, 34 92, 34168, F26B 308
Patent
active
061549800
ABSTRACT:
A low pressure dryer for granular or powdery material includes a plurality of hoppers rotatable about a common vertical axis serially among material filling and heating, vacuum drying and material discharge positions; pneumatic piston-cylinder means for rotating the hoppers about said axis among said filling and heating, vacuum drying and discharge positions; means for heating contents of a hopper at said filling and heating positions; means for sealing a hopper at said vacuum and drying positions; means for drawing vacuum within a hopper at said vacuum drying position and means for selectably permitting downward flow of dried granular or powdery material out of a hopper at said discharge position where said hoppers move collectively and unitarily one with another.
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Mattera Michelle A.
Quinn Charles N.
Wilson Pamela
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