| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electric deionized water production apparatus which controls the formation of scale such that hardness components of Ca and Mg, and silica are not concentrated together in one concentration chamber. <P>SOLUTION: A first desaltation chamber 3, a first concentration chamber 4, a second desaltation chamber 5, a third desaltation chamber 6, and a second concentration chamber 7 are arranged in this order from a cathode chamber 2 to an anode chamber 1 between the anode chamber 1 and the cathode chamber 2. A cation exchanger is packed in the chambers 1 and 5. An anion exchanger is packed in the chambers 2, 3, 4 and 6. The wall between the chambers 3 and 4 is composed of a first anion exchange membrane 8, the wall between the chambers 4 and 5 is composed of a first cation exchange membrane 9, and the wall between the chambers 6 and 7 is composed of a second anion exchange membrane 10. Water to be treated is passed through a passage P1, the first desaltation chamber 3, a passage P2, the second saltation chamber 5, a passage P3, the third desaltation chamber 6, and a passage P4 in this order to be discharged outside as deionized water. Water flows into the first concentration chamber 4 and the second concentration chamber 7, respectively and thereafter flows out as concentrated water. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
