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:
Aug. 06, 2013
Filed:
Mar. 11, 2009
Applicants:
Tomoyuki Katagiri, Tokyo, JP;
Hisanori Nukumi, Tokyo, JP;
Kenichiro Kondo, Tokyo, JP;
Inventors:
Assignee:
IHI Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F27B 15/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fluidized bed gasification furnace has a fluidized bed formed and a freeboard section F above a bed material so as to produce a produced gas by a reaction of raw material with a gasifying agent and take out the produced gas through the freeboard section. Upon shutdown of the furnace, inert gas is fed from below to the furnace for purging of gas in the fluidized bed with inert gas while steam is supplied to a freeboard section above the fluidized bed to purge a gas in the freeboard section with steam.