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:
Nov. 04, 2003
Filed:
Dec. 06, 2001
Thomas Ruck, Rekingen, CH;
Hans Peter Knoepfel, Dottikon, CH;
Alstom Ltd., Baden, CH;
Abstract
The invention relates to a premix burner with high flame stability for use in a heat producer, preferably in the combustion chamber of a gas turbine. Modern lean operated premix burners make possible very low pollutant emissions, but sometimes operate very close to the extinction limit. To increase the stability of the lean premix combustion by increasing the distance between the flame temperature and the extinction limit temperature, it is proposed according to the invention to arrange a downstream combustion gas mixing section ( ) for the burner, which mixing section ( ) projects at least partially into the combustion chamber ( ) and enables combustion gases from the combustion chamber ( ) access to the fuel/air mixture ( ) by means of combustion gas inlet openings ( ). The added combustion gases ( ) are mixed with the fuel/air mixture ( ), and in this manner increase its temperature. This increase in temperature results in a significant increase in the flame speed, as a consequence of which the extent of the flame front ( ) and the extinction limit temperature of the burner decrease.