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. 13, 1991
Filed:
Dec. 30, 1988
Kenichi Sohma, Naka, JP;
Shigeru Azuhata, Hitachi, JP;
Yasuo Iwai, Katsuta, JP;
Tooru Inada, Hitachi, JP;
Hironobu Kobayashi, Katsuta, JP;
Kiyoshi Narato, Juo, JP;
Stephen M Masutani, Katsuta, JP;
Tadayoshi Murakami, Hitachi, JP;
Norio Arashi, Hitachi, JP;
Yoji Ishibashi, Hitachi, JP;
Michio Kuroda, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A gas turbine combustor comprises a combustion chamber, a premixing chamber in which hydrocarbon fuel and air are premixed, a nozzle with swirler for swirling and injecting the premixed fuel and air into the combustion chamber, to effect premixed combustion, and a fuel nozzle projecting into the combustion chamber and adapted to inject fuel at region wherein the premixed combustion is completed, so as to effect low air-ratio diffusion combustion thereby to produce reducing substance. NOx produced by the premixed combustion is reduced by reducing reaction with the reducing substances, so that the NOx concentration in the combustion gas is reduced. The combustor further includes an after-air ports on a peripheral wall defining the combustion chamber to effect combustion of unburnt substances.