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:
Mar. 18, 2014
Filed:
Jun. 02, 2006
Koichi Ishizaka, Takasago, JP;
Eisaku Ito, Takasago, JP;
Satoshi Tanimura, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A combustoris composed of a plurality of premixed combustion burnerseach comprising a fuel nozzleprovided in a burner tube, the fuel nozzlehaving a plurality of swirl vaneson an outer peripheral surface thereof. Injection holesare formed in each swirl vane. Staging control is exercised such that when a gas turbine is in a full load state, a fuel is injected through the injection holesof all the swirl vanes, and when the gas turbine is under a partial load, the fuel is injected only through the injection holesof a specific number of the swirl vanesadjacent in a circumferential direction, and fuel injection through the injection holesof the remaining swirl vanesis stopped. By performing such staging control over fuel injection or its stoppage for the swirl vanes, a fuel-air ratio can be increased locally, generation of CO and UHC can be suppressed, and high efficiency combustion can be achieved, even under the partial load.