Low nox burner

Details Low nox burner Low nox burner

F - Mech Eng,Light,Heat,Weapons

23

D

158/3

F23D 17/00 (2006.01) F23C 6/04 (2006.01) F23L 7/00 (2006.01)

Patent

CA 1119506

ABSTRACT OF THE DISCLOSURE A low NOx burner for a furnace operating under natural draft in which primary and secondary combustion air are provided to a first burning zone, in which either or both liquid and gaseous fuel can be used. Less than stoichiometric air is supplied in the primary burning zone and tertiary combustion air is supplied in a second combustion zone downstream from the first combustion zone. The total air supply is over the stoichiometric requirement. Air control means is provided so that a fixed ratio of primary- secondary air/tertiary air is provided for all burning and fuel rate condi- tions so as to maintain the less than stoichiometric air supply to the first combustion zone. In addition, water atomization is provided upstream of the first burning zone to provide a burning chemistry which favors the reduction of NOx in the first burning zone.

329990

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