Mitsubishi Electric Corporation

Nagaoka University of Technology

Teruki Naito

Yasutaka Inanaga

Gaku Oinuma

Yu Kamiya

Masakazu Taki

Yukihisa Yoshida

Weihua Jiang

Shingo Yamaura

Hayato Ogino

Yuichiro Fukuma

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.

Water treatment device and water treatment method

One of the purposes is to provide a pulse discharge power supply for use in generating pulse discharge. The pulse discharge power supply includes a pulse generation unit, a control circuit, an electric current detector and an electric current signal processing unit. The pulse generation unit generates a first pulse, and applies it to a discharge load for generating pulse discharge. The electric current detector detects an electric current flowing into the discharge load in accordance with the application of the pulse. The electric current signal processing unit outputs into the control circuit a signal based on an integration result of the electric current having been detected. The control circuit controls the generation of a second pulse in the pulse generation unit based on the signal being received.

Pulse discharge power supply and pulse discharge generating method

A water treatment device includes a grounding electrode having a planar flowing water portion that causes treatment target water to flow, a multiple of wire form high voltage electrodes provided parallel with the flowing water portion in a position distanced from the flowing water portion of the grounding electrode and to extend in a direction intersecting a flow direction of the treatment target water, and a blowing device that forms a gas flow that intersects an extension direction of the high voltage electrode and intersects an extension direction of an electrical discharge. This kind of configuration is such that even when water droplets adhere to the high voltage electrode, the water droplets are blown away by a pressure of the gas flow formed by the blowing device, and a spark discharge is restricted.

A water treatment apparatus includes: a trough-shaped flow path portion () on which treatment target water (W) flows; a high-voltage portion () having a plurality of high-voltage electrodes () disposed above the flow path portion () spacing therebetween in a direction orthogonal to a direction in which the treatment target water (W) flows; and an electric field relaxation portion () having first members () and second members () provided so as to extend around the high-voltage portion (). Water treatment is performed by applying a high voltage from a pulse power supply () to the high-voltage portion (), the first members (), and the second members () in order to generate electric discharge between the high-voltage electrodes () and the flow path portion (). And water treatment is performed by dissolving generated active species such as ozone and hydroxyl radicals into the treatment target water.

An antenna device includes a ground conductor (), a dielectric tube () containing an ionizing gas and passing through the ground conductor, whose folded-back portion () and both ends are disposed in different sides of the ground conductor, first electrodes () disposed at both ends of the dielectric tube (), a plasma excitation power supply connected to the first electrodes, bringing the ionizing gas into a plasma state; a second electrode () ring-shaped and disposed at the both ends side of dielectric tube () from the ground conductor (), fitted to and in contact with the dielectric tube outer surface, a high frequency transmitter () supplying a high frequency signal to the second electrode (), and a feed line () connecting the second electrode and the high frequency transmitter. Each end of the dielectric tube () is larger than the second electrode in the inner diameter.

Antenna device

A water treatment apparatus including: discharge treatment units each including a ground electrode and a discharge electrode opposing the ground electrode, and water to be treated is treated by forming a discharge between the ground electrode and the discharge electrode, and generating ozone by the discharge, and moreover causing the water to be treated to contact the discharge; a water reservoir portion that collects, in the interior of the treatment tank, the water to be treated having been subject to water treatment by one of the discharge treatment units; and an ozone supply section that supplies the ozone in the treatment tank to the water to be treated in the water reservoir portion are provided, and wherein the water to be treated passes through the plurality of discharge treatment units as a continuous flow.

A water treatment apparatus, upper surfaces of two of the consecutively arranged ground electrodes are alternately inclined in opposite directions with respect to a horizontal plane, a gap is formed between a lower surface of an upper side ground electrode and an upper surface of a lower side ground electrode, a voltage is applied to a discharge electrode provided in the gap, thereby forming discharges both in air between the discharge electrode and the lower surface of the upper side ground electrode and in air between the discharge electrode and the upper surface of the lower side ground electrode, and water to be treated is caused to continuously flow downward from the ground electrode of an uppermost part to the ground electrode of a lowermost part along the respective upper surfaces such that the water to be treated is treated.

Growing community of inventors

Chiyoda-ku, Japan

Teruki Naito