| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit scale formation in a concentration chamber in a so-called multipass-type electric demineralizer where water is serially supplied to a plurality of demineralization chambers. <P>SOLUTION: The demineralization chambers and the concentration chamber are formed by setting cation exchange membranes and anion exchange membranes between a positive electrode and a negative electrode so that they are alternately disposed at least partially. At least three demineralization chambers are formed, and the chambers are connected in series. The water to be treated is serially supplied to the chambers. Between the demineralization chamber to which the water to be treated is first supplied and the demineralization chamber to which the water to be treated is secondly supplied, one or more other demineralization chamber is disposed. <P>COPYRIGHT: (C)2003,JPO |
