METHOD FOR DRYING BULK MATERIAL
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United States of America Patent
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Issued Date -
Feb 4, 2016
app pub date -
Apr 2, 2014
filing date -
Apr 4, 2013
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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 (7) by means of an air flow. The moistened returned air or the process air flow (10) that emerges from the drying silo (7) is dried in a drying cell containing a drying or adsorbent agent and returned in the form of a drying air flow (12) to the bulk goods again. The drying cell is preferably a wheel dryer (11) consisting of an air distribution cover and an air distribution floor having a rotatable drum arranged therebetween. The adsorbent agent is furthermore regenerated in the wheel dryer (11). The drum of the wheel dryer (11) is divided by the air distribution cover and the air distribution floor into two regions through which air is able to flow. One region (5) is used to regenerate the adsorbent agent and the other region (6) is used for drying or dehumidifying the process air flow (10). The region (6) for drying or dehumidifying the process air flow (10) adjoins the region (5) for regenerating the adsorbent agent, wherein the hot adsorbent agent is introduced uncooled into the region (6) for drying or dehumidifying the process air flow (10).
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