Hitachi, Ltd.

Hitachi Plant Technologies, Ltd.

Yoshihiko Mochizuki

Shinichi Kawabata

Sachio Maekawa

Keigo Orita

Naoyuki Ohashi

Mitsuaki Yanagida

Toshio Hatada

Toshihiko Fukushima

Takao Senshu

Sachio Sekiya

Masaaki Itoh

Hirokiyo Terada

Katsumi Matsubara

Kenji Tokusa

Minetoshi Izushi

Takeo Tanaka

Makoto Nagai

Naoto Katsumata

Minoru Sato

Masao Imanari

Hiromi Tsuji

An object of the present invention is to provide a treatment method and a plant of an exhaust gas in which corrosion resistance of the exhaust gas treatment plant to a sulfuric acid mist after wet type desulfurization is increased. The treatment method of an exhaust gas in the present invention, wherein sulfur oxide is removed by wet type desulfurization of the exhaust gas and a sulfuric acid mist is removed by feeding ammonia into the exhaust gas, is characterized in that an ammonia gas is mixed into the exhaust gas by feeding inorganic ammonium salt to an alkali desulfurizing agent when the desulfurizing agent is sprayed into the exhaust gas to absorb and remove the sulfur oxide in the exhaust gas.

Treatment method and treatment facilities of exhaust gas

A structure for attaching a dust collection electrode of a wet electric dust collector that is low-cost and resistant to entire face corrosion, space corrosion, and hole corrosion. An end of a dust collection electrode element is tightened and slung to be supported by a slung beam slung in a lateral direction in a building accommodating a dust collection apparatus. A supporting member made of Hastelloy&#xae; is attached to the dust collection electrode element. The supporting member and the slung beam include attachment holes through which the supporting member and the slung beam are tightened together by a bolt and nut. The slung beam and the dust collection electrode element have therebetween the supporting member to sling and support the slung beam and the dust collection electrode plate so that the slung beam and the dust collection electrode plate are separated from each other.

Structure for attaching dust collection electrode of wet electric dust collector

The present invention provides a water-flowing mechanism in a wet type electrostatic precipitator that can stably and quickly form a water film on a dust-collecting plate even at the beginning of the operation and that has an excellent adjusting function of a supplying flow-rate of washing liquid. The present invention includes a dust-collecting plate, a washing liquid supplying source to wet the dust-collecting plate, and a cylindrical member that is opened according to the shape of the upper end face of the dust-collecting plate and into which the washing liquid supplying source is inserted, wherein the horizontal cross-section of the dust-collecting plate is formed in a corrugated shape, and the lower opening of the cylindrical member is formed in a corrugated shape according to the dust-collecting plate.

Water-flowing mechanism of wet type electrostatic precipitator

An electrostatic precipitator that can prevent the corrosion of a discharge electrode even if a gas to be treated containing a corrosive mist is treated. In an electrostatic precipitator having a discharge electrode arranged along a flow path of the gas to be treated, a spray nozzle that can spray a water to the upstream side of the discharge electrode is mounted. A wet film is formed on the surface of the discharge electrode with the water sprayed from the spray nozzle. The sprayed water is desirably a water vapor or a water droplet having a particle diameter of less than 10 &#x3bc;m.

Wet type electrostatic precipitator

An ice thermal storage type air conditioner includes an outdoor unit,equipped with a compressor,and an outdoor heat exchanger,, an indoor unit,equipped with an indoor heat exchanger,and an expansion valve,, and an ice thermal storage tank,. The ice thermal storage tank is equipped with a heat exchanger exchanger used as a condenser when the accumulated heat is used. The heat exchanger has a pipe-shaped heat transfer tube,and a plate-shaped fin,installed to the heat transfer tube. The fin is installed vertically, and a plurality of rows of the heat transfer tubes and the fins are arranged.

Ice thermal storage type air conditioner and ice thermal storage tank

A fin-tube type heat exchanger has parallel heat transfer tubes and a stack of a plurality of plate fins mounted on the tubes. Heat exchange is conducted between a first fluid flowing through the tubes and a second fluid flowing through the stack across each of the fins. Each fin has flat tube-mounting portions spaced in the longitudinal direction of the fin and formed with tube-mounting holes and a louver section disposed between each adjacent pair of tube-mounting portions. The louver section has elongated slats extending longitudinally of the fin and having side edges each spaced from an adjacent side edge of an adjacent slat. The slats are classified into two groups in respect of the cross-sectional shape. The slats of one group have generally flat cross-sections to reduce the resistance of the fin to the flow of the second fluid through the stack and are disposed in planes offset from the plane of the tube-mounting portions. The slats of the other group have V-shaped or inverted V-shaped cross-sections to increase stiffness of the fin in the longitudinal direction thereof.

Fin-tube type heat exchanger

Growing community of inventors

Tokyo, Japan

Yoshihiko Mochizuki