Liquid purification or separation – With program actuator
Patent
1993-12-08
1995-11-07
Nessler, Cynthia L.
Liquid purification or separation
With program actuator
210142, 210269, 210279, 210677, 210678, C02F 142
Patent
active
054645301
ABSTRACT:
An ion exchanger of the countercurrent type includes a pressure vessel for supporting a resin bed. The vessel includes a first port through which water to be treated is supplied to the vessel during a production cycle, a second port through which regenerant is supplied to the vessel during a regenerant cycle, and a third port located intermediate of the first and second ports and connected to a lower in-bed distributor located within the vessel. A recycling loop is provided between the third port and the first port for recycling regenerant during at least a portion of the regeneration cycle. An upper in-bed distributor is located within the vessel slightly above the lower in-bed distributor and has an associated fourth port through which waste regenerant is removed from the vessel during the regeneration cycle. Due to the recycling loop, the portion of the bed located between the top of the vessel and the upper in-bed distributor operates in a cocurrent mode while the portion of the bed located between the lower in-bed distributor and the bottom of the vessel operates in a countercurrent mode. Thus during a normal regeneration cycle the vessel exhibits both cocurrent and countercurrent operation.
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Judson David H.
Nessler Cynthia L.
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