Split flow EDI apparatus for treating second pass RO permeate water with high flow rate
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United States of America Patent
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Aug 4, 2015
Grant Date -
Apr 5, 2012
app pub date -
Oct 3, 2011
filing date -
Oct 4, 2010
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Abstract
We report an electro-deionization (EDI) device having split flow arrangement for the purification of second pass RO permeate water with high flow rate in which the feed water is fed through the center port and is diverted into each section of dilute chamber with equal flow rate, producing two product streams. The EDI device has concentrate chambers adjacent to dilute chambers in two sections of the stack, allowing independent flow through the separate sections. The split flow design reduces resin bed depth requirement for processing of second pass RO permeate water. This results in higher flow rate through the stack, elimination of the pressure drop limitation, and reduction of power consumption per unit volume of water.
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