Abstract: A biometric information authentication device includes a control unit, wherein, when a first biometric authentication is successfully completed based on biometric information acquired from an operator and registered biometric information preliminarily registered by a registered person and an operation for registering new registered biological information is subsequently performed, the control unit permits registration upon a successful second biometric authentication based on biometric information acquired again and the registered biometric information preliminarily registered by the registered person.

Abstract: A biometric information authenticating device includes a biometric information sensor to detect contact of an operating finger with a reading surface and to read biometric information of the operating finger, an illumination unit including at least one light source, and a control unit to indicate completion of reading of the biometric information by an illumination pattern including a combination of turning on and off of the at least one light source.

Abstract: 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.

Abstract: 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.

Abstract: 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® 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.

Abstract: A structure for attaching a dust collection electrode of a wet electric dust collector that is low-cost and that is resistant to all of an entire face corrosion, a space corrosion, and a hole corrosion. The structure for attaching a dust collection electrode of a wet electric dust collector is structured so that an end of a dust collection electrode element 3 made of super stainless material is tightened at and is slung to be supported by a slung beam 2 slung in a lateral direction in a building accommodating a dust collection apparatus. A supporting member 5 made of Hastelloy® is attached to the dust collection electrode element 3. The Hastelloy-made supporting member 5 and the slung beam 2 include attachment holes 5a and 2a through which the supporting member 5 and the slung beam 2 are tightened together by tightening means (6, 7).