Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Kie Kubo

Kazuhiko Noda

Ryoichi Takahashi

Takaaki Murata

Seiichi Murayama

Kenji Taguchi

Kotaro Iyasu

Yuji Okita

Norimitsu Abe

Futoshi Kurokawa

Shojiro Tamaki

Nobuyoshi Kaiga

Michiko Hashimoto

Masao Kaneko

Takumi Hayashi

Akira Hiramoto

Kenji Takeuchi

Hiroshi Mochikawa

Takeshi Ide

Setsuo Suzuki

Akihiko Shirota

Takahiro Soma

Ryoichi Arimura

Ryutaro Makise

Kiyoyuki Amemori

An ozone generation device includes an inverter, an ozone generator, and a reactor. The inverter turns on and off a switching element by pulse width modulation (PWM) control to convert DC power into AC power. In the ozone generator, voltage of the AC power is applied to a dielectric electrode, and discharge is generated in raw material gas flowing in a discharge gap between the dielectric electrode and a metal electrode, so that ozone is generated by the discharge. The reactor is connected in series to a dielectric electrode, and reduces an inrush current that flows through the dielectric electrode when the switching element is switched from off to on by the PWM control by the inverter.

Ozone generation device and power supply for ozone generation device

An ozone generation apparatus includes a cylindrical shaped first electrode, a cylindrical shaped second electrode disposed coaxially with the first electrode and disposed in the first electrode, a dielectric disposed between the first electrode and the second electrode. Dry air is supplied between the first electrode and the second electrode as raw material gas. A discharge gap length d formed by the first electrode, the second electrode, and the dielectric is set to be in a range of 0.3 to 0.5 mm. A pd product, which is a product of the discharge gap length d and a gas pressure p of the raw material gas, is in a range of 6 to 16 kPa&#xb7;cm. And the discharge gap length d and the gas pressure p of the raw material gas are set to satisfy following expression.

Ozone generation apparatus

According to an embodiment, an extraction device includes an elastic body, first and second pressing units, and a pulling unit. The elastic body includes a first end facing a first direction, a second end, and a contact face facing a second direction intersecting with the first direction. The elastic body can expand in the second direction. The first and second pressing units press the first and second end. The pulling unit pulls the second pressing unit toward the first direction. The contact face comes into contact with an object when the elastic body compressed by pressing forces of the first pressing unit and the second pressing unit expands in the second direction. The pulling unit pulls the object with friction between the object and the contact face when the pulling unit is pulled in the first direction while the contact face of the elastic body is in contact with the object.

Extraction device and retaining device

A cylindrical tank-shaped container including: plural parallel electrode tubes; discharge tubes arranged inside the electrode tubes, each forming a discharge gap; a pair of end plates that penetrate and hold both of end sections of the plural electrode tubes; a cooling space formed by the pair of end plates and the inner surface of the tank-shaped container divided between end plates; a cooling medium inlet and a cooling medium outlet formed in opposite end sides of the cooling space; a raw material gas inlet that introduces raw material gas to be sent to the discharge gaps; and an outlet for ozone gas generated from the raw material gas by silent discharge in the discharge gaps, providing an electrode tube in which a discharge tube is not arranged, among the plural electrode tubes, that have surrounding coolant medium that reaches at least a prescribed temperature resulting from the silent discharge.

Ozone generation device

According to one embodiment, an apparatus for measuring hydroxyl radicals that measures hydroxyl radicals produced by irradiating a liquid to be treated flowing through a channel in which an ultraviolet lamp is arranged with ultraviolet rays, the apparatus includes a diverting unit, a reagent adding unit, and a measuring unit. The diverting unit has a diverting channel that diverts the liquid to be treated before being irradiated with the ultraviolet rays from the channel and part of which is arranged at a position enabling the liquid to be treated within the channel to be irradiated with the ultraviolet rays. The reagent adding unit adds a hydroxyl radical measuring reagent to the diverted liquid to be treated. The measuring unit irradiates the diverted liquid to be treated with the ultraviolet rays and measures the amount of hydroxyl radicals produced based on a change in the hydroxyl radical measuring reagent between before and after the irradiation with the ultraviolet rays.

Apparatus for measuring hydroxyl radicals and liquid treatment apparatus

According to one embodiment, an ozone generation device includes a first electrode unit, a second electrode unit, a fuse and a fuse holder. The first electrode unit is provided on an inner face of a discharge tube. The second electrode unit is provided outside the discharge tube at an interval. The second electrode faces the first electrode unit. A diameter of the outer face of the fuse is smaller than a diameter of the inner face. At least a part of the outer face is positioned inside the discharge tube. The fuse holder is interposed between the discharge tube and the fuse, includes the outer periphery and an inner periphery and is provided with a first opening and a second opening. The outer periphery extends in an arc along the inner face to come into contact with the inner face. The inner periphery extends in an arc along the outer face to come into contact with the outer face.

Ozone generation device and fuse holder

An ozone generating apparatus includes a cylindrical high-voltage electrode and a coaxially arranged cylindrical low-voltage electrode. A predetermined high voltage is applied between the high-voltage and low-voltage electrodes via a dielectric substance to cause discharge generating ozone, the discharge gap length being 0.3 to 0.5 mm. One of the low-voltage and high-voltage electrodes is a metal electrode and the other a dielectric electrode. A projection group including plural done shape projections, arranged on same circumference of the metal electrode, is arranged on an inner peripheral surface of the metal electrode to hold the metal electrode coaxial with the dielectric electrode while keeping the discharge gap length. The projection group is arranged at a center portion in a longitudinal direction of the discharging space positioned away from both ends of the discharging space by a predetermined distance Lsatisfying, 0.0&#x2266;L/L&#x2266;0.1, L being length of the discharging space.

Ozone generating apparatus

A water treatment control system for minimizing trihalomethane formation includes chlorine injection equipment having a plurality of chlorine injectors (), a fluorescence analyzerprovided on the upstream of the chlorine injectors, and a water flowmeterAn chlorine injection rate necessary to reduce a trihalomethane formation potential is calculated by a chlorine injection rate calculating apparatusbased on a measured value from the fluorescence analyzerAn chlorine injection amount from the chlorine injectors is controlled by chlorine injection amount control apparatusesbased on the chlorine injection rate and a measured value from the flowing water flowmeter

Water treatment control system for minimizing trihalomethane formation

A UV-assisted advanced-ozonation water treatment system comprises a water treating tank, an ozonic water tank, an ozonized gas generator, and a UV light sourcedisposed in the water treating tankand having a UV-radiating surface, and an ozonic water jetting device including jetting nozzlesfor jetting the ozonic water onto the UV-radiating surface of the UV light source. An ozonized gas diffusing deviceis placed in the ozonic water tank. An ozonized gas generated by the ozonized gas generatorand compressed by a compressorat a pressure in the range of about 2 to about 3 kg/cmis diffused into the ozonic water tankby the ozonized gas diffusing device. A high-pressure, a high-ozone-concentration ozonic water produced in the ozonized water tankis jetted through the jetting nozzlesonto the UV-radiating surface

UV-assisted advanced-ozonation water treatment system and advanced-ozonation module

A water treatment control system using a fluorescence analyzer includes an activated carbon injection equipment having an activated carbon injector , a fluorescence analyzer provided on the upstream of the activated carbon injector , and a flowing water flowmeter An activated carbon injection rate necessary to reduce a trihalomethane formation potential is calculated by an activated carbon injection rate calculating apparatus based on a measured value from the fluorescence analyzer An activated carbon injection amount from the activated carbon injector is controlled by an activated carbon injection amount control apparatus based on the activated carbon injection rate and a measured value from the flowing water flowmeter

Growing community of inventors

Toshima, Japan

Kie Kubo