Method and system for controlling airflow in a multiple bed desiccant drying system
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United States of America Patent
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Jan 8, 2002
Grant Date -
N/A
app pub date -
May 18, 2000
filing date -
Nov 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and system for controlling airflow in a desiccant drying system having two desiccant beds. A first diverter valve (14A) communicates with each of the desiccant beds, a regeneration air inlet (22A), and a process air outlet (28A). A second diverter valve (16A) communicates with each of the desiccant beds, a process air inlet, and a regeneration air outlet. A first of the beds is regenerated by moving the first diverter valve to a position which the first bed communicates with the regeneration air inlet and a second of the beds communicates with the process air outlet, and by moving the second diverter valve to a position in which the first bed communicates with the regeneration air outlet and the second bed communicates with the process air inlet. The first bed is subsequently cooled by moving the first diverter valve to an intermediate cooling position in which the second bed communicates with both of the process air outlet and the first bed, and closing the regeneration air inlet.
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