C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/34
C02F 1/42 (2006.01) B01J 39/00 (2006.01) B01J 41/00 (2006.01) B01J 47/00 (2006.01) B01J 47/02 (2006.01) B01J 47/04 (2006.01)
Patent
CA 1285666
ABSTRACT OF THE DISCLOSURE A water demineralizer system and method is provided in which at least three beds of resin particles connected in series flow arrange ment preferably within a single vessel for substantially removing metal ions such as calcium and magnesium from water feed by exchange with hydrogen ions. The raw feed water flows first through a cation resin bed, then through an anion resin bed, and then through a bed of mixed cation and anion resins, and preferably flows downwardly through the beds. After the resin beds become saturated with metal ions from the feed water, mainly by calcium and magnesium ions, the beds are regenerated by first backwashing with water, then chemically treating with acid and caustic solution, followed by bed rinsing, air mixing and backflushing with water prior to further use for demineralizing the feed water.
503502
Chen James Y.
Crane Co.
Finlayson & Singlehurst
Foster Wheeler Corporation
Foster Wheeler Usa Corporation
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