Method for drying bulk material
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United States of America Patent
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Nov 1, 2016
Grant Date -
Jan 3, 2013
app pub date -
Mar 2, 2011
filing date -
Mar 3, 2010
priority date (Note) -
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Abstract
The invention relates to a method for drying bulk goods, in particular solids, such as granular materials, powders, grains, films, shreds, or the like, preferably plastic granular material, in a drying silo (9) by means of an air flow. The exhaust air flow (5) that is discharged from the drying silo (9) is dried in a wheel dryer (1). The adsorbent is regenerated and cooled in the wheel dryer. A rotatable drum (2) of the wheel dryer (1) is divided into at least three wheel segments, wherein the region of a wheel segment is used for drying or dehumidifying the exhaust air flow, the region of the second wheel segment is used for heating the adsorbent, and the region of the third wheel segment is used for cooling the adsorbent. The drying or dehumidifying phase (14) for the exhaust air flow (5) and preferably the adsorbent cooling occur in parallel, in particular in a continuous manner during the operation. The regenerating phase (15) with the adsorbent heating is carried out at intervals during the operation. The drum (2) of the wheel dryer is stopped in the cooling (16) or regenerating phase (15) and advanced to a selectable region, preferably the cooling region, after the cooling (16) or regenerating phase (15) finishes.
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