Adjustably metered transfer of resin increments in folded bed ion exchange systems
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United States of America Patent
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Jul 24, 1984
Grant Date -
N/A
app pub date -
May 31, 1983
filing date -
May 31, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Adjustably metered transfer of resin increments in folded bed ion exchange systems are provided by a method and apparatus in which compacted liquid-containing resin granules are expelled from a column into a metering chamber which is filled to a level of a granule-retaining screen, the cut-off of the granule filling being signaled by liquid moving through the screen to a control level thereabove and/or by an increase in the hydraulic pressure of the liquid below the screen. In preferred embodiments the measuring chamber is provided with a flexible wall which is positioned to either increase or decrease the volume of the measuring chamber and thereby selectively vary the volume of the granule increment captivated by the chamber. The invention provides for the pulsing of resin increments of precisely and adjustably metered volume, and provides a means for keeping the loading and regeneration sides of the system in resin transfer balance.
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