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:
May. 03, 1977
Filed:
Aug. 21, 1975
Kazuo Yamagishi, Urawa, JA;
Ichiro Nakamachi, Abiko, JA;
Masaaki Nozawa, Yokohama, JA;
Tsunenori Tokumoto, Yokosuka, JA;
Shoichi Yoshie, Kawasaki, JA;
Yasuo Kakegawa, Tokyo, JA;
Isamu Kikuchi, Yokohama, JA;
Yoshihisa Iseda, Tokyo, JA;
Yoshihiro Kanno, Yokohama, JA;
Sadanori Yamazaki, Tokyo, JA;
Masanobu Sato, Asaka, JA;
Tokyo Gas Company Limited, Tokyo, JA;
Abstract
Burner arrangements for staged combustion to decrease nitrogen oxides (NOx) during the combustion of hydrocarbon fuel with air. The burner arrangements have a combustion into which hydrocarbon fuel and less than 70% of the stoichiometric air are introduced, and a path for the secondary air around the combustion chamber. A flame holding means is provided in one end of the combustion chamber to stabilize the substoichiometric combustion so that a partially burned gas containing mainly H.sub.2 and CO as combustible components is obtained. The combustion chamber has an exit, and there is an exit from the secondary air path near the exit of the combustion chamber. A discharging means for the partially burned gas is provided at the exit of the combustion chamber to vary the pattern of the flow of said partially burned gas by converting the enthalpy of said partially burned gas into kinetic energy. A discharging means for the secondary air is also provided at the exit for the secondary air to vary the pattern of the flow of the secondary air.