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. 28, 2004
Filed:
Jul. 22, 2002
Alstom Technology LTD, Baden, CH;
Abstract
The invention relates to a premix burner with high flame stability for use in a heat generator, preferably in the combustion chamber of a gas turbine. Modern, lean-operated premix burners enable very low noxious emissions, but sometimes operate very close to the extinction limit. To increase the stability of the lean premix combustion by increasing the distance between flame temperature and extinction limit temperature the invention proposes to equip the burner in the mixing zone ( ) with a net-like structure ( ) for the premixing of combustion air and fuel. According to a preferred embodiment, the net-like structure ( ) consists of a plurality of layers of individual wire mesh fabrics ( ) arranged at a distance from each other. The wire mesh fabrics ( ) are preferably equipped with an oxidation-promoting, catalytically active surface. It was found that the net structure ( ) positively influences the thermoacoustic behavior of the burner and dampens and insulates pressure waves from the combustion chamber ( ), and in this way reduces the excitation of pressure waves in the combustion chamber ( ).