C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/44 (2006.01) C02F 5/00 (2006.01)
Patent
CA 2454425
An apparatus and methods for softening water is disclosed. In particular, an apparatus and method for softening water without the addition of ions the wastewater stream is disclosed. The apparatus generally includes at least one nanofiltration filter element configured and arranged to receive an input flow of hard water, discharge an output flow of permeate water comprising a portion of the input flow, and discharge an output flow of non-permeate water comprising a portion of the input flow. The nanofiltration filter element typically has an average pore size that permits the passage of water and monovalent ions but substantially prevents the passage of divalent ions.
L'invention concerne un appareil et des procédés d'adoucissement de l'eau. L'invention concerne en particulier, un appareil et un procédé d'adoucissement de l'eau sans adjonction d'ions dans le flux d'eaux usées. Cet appareil comprend en général au moins un élément de filtrage de nanofiltration configuré et disposé de manière à recevoir un flux entrant d'eaux dures, d'évacuer un flux sortant d'eau purifiée contenant une partie du flux entrant et d'évacuer un flux sortant d'eau non-purifiée contenant une partie du flux entrant. L'élément de filtrage de nanofiltration possède habituellement une taille de pore moyenne qui permet le passage d'eau et d'ions monovalents tout en empêchant quasiment le passage d'ions divalents.
Aschauer Martin N.
Lee Robert Sung
Muralidhara Harapanahalli S.
Cargill Incorporated
Sim & Mcburney
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