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US 2009/0288959 A1Published application
Method of softening water and apparatus therefor
OwnerTakayuki Nakanoinventor
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OwnerTakayuki Nakanoinventor
Estimating the term…
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.
A method of softening water by flowing water to be treated between opposing electrode plates, and applying a DC voltage across the electrode plates so that metal ions in the water to be treated are electrolytically precipitated on the electrode plates on the negative pole side to thereby soften the water to be treated, wherein titanium plates are used as the electrode plates on the positive pole side, and electric current is flown across the electrode plates in an amount sufficient for applying a voltage that is capable of dielectrically breaking down an anodically oxidized film formed on the surfaces of the electrode plates on the positive pole side.
An apparatus for softening water comprising an electrolytic vessel for receiving and draining water to be treated, one or more first electrode plates installed in the electrolytic vessel, one or more second electrode plates installed in the electrolytic vessel maintaining a predetermined gap relative to the first electrode plates, and a DC source for applying a DC voltage across the first electrode plates and the second electrode plates, wherein the first electrode plates and the second electrode plates both comprise titanium plates, and the DC source is a regulated DC power supply capable of supplying a voltage for peeling and removing, by dielectric breakdown, an anodically oxidized film formed on the surfaces of the first electrode plates or of the second electrode plates.
Dependencies are inferred from the claim text.