University of California

University of Alberta

Larry W Kostiuk

Robert K Cheng

Matthew R Johnson

A lean premixed fuel burner includes a peripheral ring stabilizer which divides the flow into a primary gas flow and a secondary gas flow and generates a secondary flame substantially surrounding the main flame formed by the main gas flow. Further stabilizers are provided in the area of the primary gas flow on the inside of the peripheral stabilizer. These stabilizers divide the main gas flow into a plurality of subsidiary flows whereby the primary flame is formed by a plurality of discrete flame formed in the spaces between the secondary stabilizers thereby to provide a main flame significantly shorter in the direction of gas flow than if a single primary flame is used.

Lean premixed fuel burner

An apparatus for enabling a burner to stably burn a lean fuel/air mixture. The burner directs the lean fuel/air mixture in a stream. The apparatus comprises an annular flame stabilizer; and a device for mounting the flame stabilizer in the fuel/air mixture stream. The burner may include a body having an internal bore, in which case, the annular flame stabilizer is shaped to conform to the cross-sectional shape of the bore, is spaced from the bore by a distance greater than about 0.5 mm, and the mounting device mounts the flame stabilizer in the bore. An apparatus for burning a gaseous fuel with low NOx emissions comprises a device for premixing air with the fuel to provide a lean fuel/air mixture; a nozzle having an internal bore through which the lean fuel/air mixture passes in a stream; and a flame stabilizer mounted in the stream of the lean fuel/air mixture. The flame stabilizer may be mounted in the internal bore, in which case, it is shaped and is spaced from the bore as just described. In a method of burning a lean fuel/air mixture, a lean fuel/air mixture is provided, and is directed in a stream; an annular eddy is created in the stream of the lean fuel/air mixture; and the lean fuel/air mixture is ignited at the eddy.

Growing community of inventors

Edmonton, Canada

Larry W Kostiuk