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:
Dec. 06, 2011
Filed:
Dec. 17, 2009
Nobuyuki Ukai, Hiroshima, JP;
Moritoshi Murakami, Hiroshima, JP;
Susumu Okino, Hiroshima, JP;
Tatsuto Nagayasu, Hiroshima, JP;
Seiji Kagawa, Hiroshima, JP;
Nobuyuki Ukai, Hiroshima, JP;
Moritoshi Murakami, Hiroshima, JP;
Susumu Okino, Hiroshima, JP;
Tatsuto Nagayasu, Hiroshima, JP;
Seiji Kagawa, Hiroshima, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A mercury reduction system includes an NHCl supplying unit that sprays an NHCl solution into a flue of the boiler, a reduction denitration apparatus that includes a denitration catalyst for reducing NOx in the flue gas with NHand oxidizing Hg in the presence of HCl, and a wet desulfurization apparatus for reducing Hg oxidized in the reduction denitration apparatus with limestone-gypsum slurry. The NHCl supplying unit includes an NHCl solution feed pipe that supplies the NHCl solution into the flue in a liquid state, a blow pipe that is inserted into the flue so as to surround the NHCl solution feed pipe and through which air is injected into the flue, and a two-fluid nozzle that is fitted to an end of the NHCl solution feed pipe and through which the NHCl solution is injected. Through the two-fluid nozzle, the NHCl solution is injected and sprayed in fine liquid droplets. NHis supplied by an ammonia supplying unit and HCl is supplied by a hydrogen chloride supplying unit wherein both units are located between the NHCl agent supplying unit and the reduction denitration apparatus.