Mitsubishi Electric Corporation

Yu Kamiya

Yasutaka Inanaga

Gaku Oinuma

Teruki Naito

A water treatment apparatus includes: a plurality of plate-shaped ground electrodes; a high-voltage electrode unit having counter electrode portions opposing the ground electrodes, support portions supporting the counter electrode portions, and a voltage receiving portion for receiving a high voltage; a water supply unit for supplying to-be-treated water to between the ground electrodes from above, insulating members each having a lower end portion fixed to a support structure fixing lower end portions of the ground electrodes, and an upper end portion connected to the voltage receiving portion of the high-voltage electrode unit. The lower ends of the support portions of the high-voltage electrode unit are held in a space between the ground electrodes, and a portion where each insulating member and the high-voltage electrode unit are connected to each other is located above the water supply unit, so that electric leak due to the to-be-treated water is inhibited.

Water treatment apparatus

A water treatment apparatus includes: a treatment tank, having therein a grounded electrode and a high-voltage electrode opposing the grounded electrode, for generating electric discharge between both the electrodes, and causing to-be-treated water to pass between the electrodes and contact with the electric discharge to perform water treatment, an ozone mixing portion for supplying ozone-containing gas in the treatment tank through a gas sending portion to the to-be-treated water supplied from outside, and a gas returning portion for sending gas in the ozone mixing portion to the treatment tank, are provided, and water treatment is performed by ozone in the ozone mixing portion, and water treatment is thereafter performed by the electric discharge in the treatment tank.

Water treatment apparatus and water treatment method

A water treatment device includes, between at least two flat sheet-shaped grounded electrodes vertically disposed so as to be parallel to each other, a sheet-shaped high-voltage electrode having two edges opposing the respective grounded electrodes. The sheet-shaped high-voltage electrode is supported by a plurality of support members, and thus deformation of the high-voltage electrode in an up/down direction and a horizontal direction is suppressed, and the distance between each edge of the high-voltage electrode and the corresponding grounded electrode, i.e., an electric discharge gap length, can be kept even. Accordingly, uniform electric discharge can be maintained between the high-voltage electrode and the grounded electrode, whereby highly efficient water treatment can be realized.

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Chiyoda-ku, Japan

Yu Kamiya