Method and apparatus for regenerating a moist absorption medium
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United States of America Patent
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Jul 27, 1999
Grant Date -
N/A
app pub date -
Jun 13, 1997
filing date -
Jun 13, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus for regenerating a moist adsorption medium in a multiple vessel drying system utilize a pulsed control of a purge gas outlet valve during a regeneration phase. Internal heaters are embedded in the desiccant beds. During the regeneration phase of a desiccant bed, the internal heater heats the desiccant to remove the moisture therefrom in the form of water vapor. After the water vapor builds up in the drying vessel for a certain period of time, the purge gas outlet valve is opened for a period of time just long enough to flush the built up water vapor from the vessel, and is then closed again. Accordingly, the amount of purge gas required is minimized, which leads to a higher quality purge, higher overall system drying efficiency, as well as reduced energy requirements.
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