Babcock-hitachi Kabushiki Kaisha

Nisshin Steel Co., Ltd.

Masato Mukai

Tomihisa Ishikawa

Yasuyoshi Kato

Hiroshi Kuroda

Takashi Michimoto

Yoshinori Nagai

Isato Morita

Akihiro Yamada

Masaharu Morii

Yoshio Nakajima

Satoru Shishido

Toshimichi Wada

Takao Asami

Kozo Matoba

Katsuhiro Yashio

Katsunori Fukui

An apparatus having a baffle device and used for treating an exhaust gas, the apparatus comprising:

Waste gas treating device having flow regulator

A catalyst unit is constructed by alternately stacking rectangular catalyst elements (1) formed by cutting catalyst support plates coated with a catalytic material and having ribs (2) inclined at 45.degree. to one specified side edge (1a) of each thereof, and those turned upside down in a case, and the catalyst unit is disposed in a gas passage with the ribs (2) of the catalyst elements (1) inclined at an angle greater than 0.degree. and smaller than 90.degree. to the direction of the gas flow (6). When the catalyst unit comprising the catalyst elements (1) coated with a denitrating catalyst is placed in the gas passage, the ribs (2) of the catalyst elements (1) blocks the gas flow (6) and generate turbulent currents on the downstream side thereof to promote the contact of ammonia and NOx contained in the exhaust gas with the catalyst. When the gas flow (6) is disturbed, the thickness of laminar films covering the surface of the catalyst elements (1) is reduced, so that ammonia and NOx can be easily diffused and the catalytic activity can be enhanced. The catalyst elements exhibits their catalytic abilities effectively without entailing significant pressure loss in the gas flow.

Catalyst unit and gas purifying apparatus

Method for dephosphorization of chromium-containing molten pig iron with

A denitration reactor comprises an entrance duct portion into which exhaust gas from a boiler flows, an intermediate duct portion incorporating therein a catalyst layer for denitration, and exit duct portion connected to the intermediate duct portion. The intermediate duct portion is so disposed that an axis thereof is perpendicular to an axis of the entrance duct portion. The reactor further comprises a bent portion for connecting the entrance duct portion to the intermediate duct portion, and a flow controller. The wall of the bent portion is inclined with an inclination angle .theta. and extends from a section on which one wall of the intermediate duct portion crosses a surface of a floor of the entrance duct portion to a section on which a plane including opposite wall of the intermediate duct portion crosses a roof of the entrance duct portion. The flow controller is so disposed in the intermediate duct portion that an exhaust gas introduction surface of the flow controller coexists with the floor of the entrance duct portion on the same plane.

Denitration reactor

Growing community of inventors

Kure, Japan

Masato Mukai