METHOD OF SOFTENING WATER AND APPARATUS THEREFOR
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United States of America Patent
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Issued Date -
Nov 26, 2009
app pub date -
Jul 31, 2007
filing date -
Aug 8, 2006
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Abstract
A method of softening water to be treated which requires the lowest maintenance and management cost without the need for a cumbersome cleaning operation for removing scale from an electrolytic vessel by taking out electrode plates from the electrolytic vessel, and an apparatus therefor are provided. In the method of softening water to be treated by applying a DC voltage across opposing electrode plates while flowing water to be treated therebetween, so that metal ions in the water to be treated are electrolytically precipitated on the surfaces of electrode plates on the negative pole side, thereby softening the water to be treated, the electrode plates comprise titanium, and increased voltage is applied to an anodically oxidized film formed on the surfaces of electrode plates on the positive pole side, to dielectrically break down the anodically oxidized film to thereby flow electric current in a desired amount.
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