The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2015
Filed:
Jan. 27, 2010
Masazumi Tanoura, Kanagawa, JP;
Kenji Muta, Kanagawa, JP;
Minoru Danno, Kanagawa, JP;
Masatoshi Katsuki, Kanagawa, JP;
Yuuko Ujihara, Kanagawa, JP;
Daishi Ueno, Tokyo, JP;
Takashi Fujinaga, Hyogo, JP;
Eiji Kato, Hyogo, JP;
Shinichiro Asami, Hyogo, JP;
Tadashi Aoki, Hyogo, JP;
Kageharu Moriyama, Kanagawa, JP;
Masazumi Tanoura, Kanagawa, JP;
Kenji Muta, Kanagawa, JP;
Minoru Danno, Kanagawa, JP;
Masatoshi Katsuki, Kanagawa, JP;
Yuuko Ujihara, Kanagawa, JP;
Daishi Ueno, Tokyo, JP;
Takashi Fujinaga, Hyogo, JP;
Eiji Kato, Hyogo, JP;
Shinichiro Asami, Hyogo, JP;
Tadashi Aoki, Hyogo, JP;
Kageharu Moriyama, Kanagawa, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
An object of the present invention is to provide a flue gas purifying device that can efficiently decrease nitrogen oxides in flue gas. This object is solved by including: an exhaust pipe that guides flue gas discharged from a burning appliance; a urea-water injecting unit that injects urea water into the exhaust pipe; a catalytic unit arranged on a downstream side to a position where urea water is injected in a flow direction of flue gas and having a urea SCR catalyst; a first ammonia-concentration measuring unit that measures a concentration of ammonia in flue gas at a measurement position in a region where the catalytic unit is arranged; a second ammonia-concentration measuring unit arranged on a downstream side to the catalytic unit in a flow direction of the flue gas, to measure a concentration of ammonia in the flue gas having passed through the urea SCR catalyst; and a control unit that controls injection of urea water by the urea-water injecting unit based on measurement results acquired by the first and second ammonia-concentration measuring units.