| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrically operated apparatus for producing deionized water capable of preventing a weak electrolyte in concentrated water from reversely diffusing into a desalting chamber so as not to deteriorate the quality of treated water. SOLUTION: The electrically operated apparatus for producing the deionized water comprises a main part including an anode chamber and a cathode chamber between which is disposed a desalting chamber having on either side a thickening chamber respectively. The apparatus is characterized in that a concentrated water circulating system which comprises a concentrated water tank and circulates the concentrated water flowing through the thickening chambers in the main part is provided with means for pH adjustment of the concentrated water which prevents an un-ionized molecule from reversely diffusing from a thickening chamber side into a desalting chamber side. The means for pH adjustment adjusts and maintains the pH value of the concentrated water to allow the weak electrolyte to ionize so as not to reversely diffuse into a treated water side. COPYRIGHT: (C)2007,JPO&INPIT
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