Kabushiki Kaisha Toshiba

Nobuyoshi Kaiga

Seiichi Murayama

Kie Kubo

Futoshi Kurokawa

Kenji Taguchi

Kotaro Iyasu

Shojiro Tamaki

Masao Kaneko

Akira Hiramoto

Takumi Hayashi

Soichiro Nakano

Akinori Hatano

Osamu Takase

A part of pre-treated water flowing into an ultraviolet irradiation tank is guided to a fluorometer. The fluorometer scans an excitation spectrum peak wavelength of the pre-treated water at a fluorescence wavelength fixed to 425 nm to obtain an excitation spectrum, and continuously measures an excitation peak wavelength thereof. Based on the analysis result obtained by the fluorometer, an ultraviolet irradiation device calculates an ultraviolet irradiation level target value for optimizing an ultraviolet irradiation level, and thus controls the irradiation level of ultraviolet rays emitted therefrom.

Ultraviolet irradiation system and water quality monitoring instrument

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 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

Water treatment control system using fluorescence analyzer

An ozone generator includes a feed gas chamber for receiving a feed gas, an ozone gas chamber for receiving a produced ozone gas, a tubular electrode for connecting the two chambers, a discharge tube inserted in the tubular electrode, and a power source unit for applying a voltage having a frequency higher than a frequency of commercial power between a metal film and the tubular electrode to generate a discharge having a frequency higher than the frequency of commercial power. The discharge tube is constituted by a glass tube and the metal film coated on the inner surface of the glass tube. The metal film is made of stainless steel in order to improve an ozone resistance and a nitric acid resistance and is formed to have a thickness of 2,0000 .ANG. to 5,000 .ANG. in order to prevent generation of sparks and to enhance a thermal shock resistance.

Ozone generator and ozone generating method

Growing community of inventors

Tokyo-to, Japan

Nobuyoshi Kaiga