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. 17, 2013
Filed:
Aug. 16, 2010
Hiromi Koizumi, Hitachi, JP;
Satoshi Dodo, Kasama, JP;
Hirokazu Takahashi, Hitachinaka, JP;
Tomohiro Asai, Mito, JP;
Tomomi Koganezawa, Tokai, JP;
Shohei Yoshida, Hitachiohta, JP;
Hiromi Koizumi, Hitachi, JP;
Satoshi Dodo, Kasama, JP;
Hirokazu Takahashi, Hitachinaka, JP;
Tomohiro Asai, Mito, JP;
Tomomi Koganezawa, Tokai, JP;
Shohei Yoshida, Hitachiohta, JP;
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Abstract
An object of the present invention is to provide a gas turbine combustor that supports hydrogen-containing gas having a high burning velocity and is capable of performing low NOx combustion without reducing reliability of a burner. A first fuel nozzle is provided upstream of a combustion chamber and supplies fuel for activation and hydrogen-containing gas. The combustor has a primary combustion zone, a reduction zone and a secondary combustion zone. In the primary combustion zone, the fuel supplied from the first fuel nozzle is combusted under a fuel rich condition to form a burned gas containing a low concentration of oxygen. In the reduction zone, a hydrogen-containing gas is injected into the combustion chamber through a second fuel injection hole from a second fuel nozzle so that NOx generated in the primary combustion zone is reduced by an oxygen reaction of the hydrogen. In the secondary combustion zone, air for lean combustion is supplied into the combustion chamber so that unburned part of fuel is combusted under a fuel lean condition.