| 摘要 |
PROBLEM TO BE SOLVED: To provide an EDI which can produce deionized water with reduced electric power consumption and a stable voltage, and can provide high water quality stably. SOLUTION: The EDI includes a desalting chamber 40 defined by a space which is partitioned by a cation exchange membrane 32 on one side and an anion exchange membrane 36 on the other side, and which is filled with an ion exchange material. The desalting chamber 40 includes small desalting chambers 42 and 44 which are formed by partitioning the desalting chamber 40 in the thickness direction into a plurality of stages with an intermediate ion exchange membrane 34 disposed between the cation exchange membrane 32 and the anion exchange membrane 36. A concentrating chamber 22 is installed on each side of the desalting chamber 40 via the cation exchange membrane 32 or the anion exchange membrane 36 disposed inbetween. The desalting chamber 40 and the concentrating chamber 22 are disposed between an anode chamber 18 equipped with an anode 16 and a cathode chamber 14 equipped with a cathode 12. The flow directions of to-be-treated water in the small desalting chambers 42 and 44, adjacent to each other with the intermediate ion exchange membrane 34 disposed inbetween, are opposite to each other. COPYRIGHT: (C)2009,JPO&INPIT
|
