| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric deionizer capable of being stably operated for a long period of time without generating scales even when water to be treated contains hardness components. SOLUTION: The electric deionizer is constituted of alternatively forming concentrating chambers 15 and desalting chambers 16 by alternately arranging a plurality of anion exchange membranes 13 and cation exchange membranes 14 between a cathode 12 and an anode 11, and the inside of the concentrating chambers 15 is divided into the cathode side and the anion side by installing monovalent cation-selective permeable anion exchange membranes 20 in the concentrating chambers 15. COPYRIGHT: (C)2008,JPO&INPIT
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