F - Mech Eng,Light,Heat,Weapons – 23 – N
Patent
F - Mech Eng,Light,Heat,Weapons
23
N
158/1, 110/17
F23N 1/00 (2006.01) F23C 6/04 (2006.01) F23C 9/00 (2006.01) F23D 17/00 (2006.01)
Patent
CA 2031228
METHOD FOR THE COMBUSTION OF FUEL BY STEPPED FUEL FEED AND BURNER FOR USE WITH IT ABSTRACT To lower NOx production in a stepped fuel feed combustion method, secondary fuel (15) is injected into a combustion chamber as a set through an internal recirculation zone of the primary combustion zone (6) to a secondary combustion zone (8). The stoichiometry of the system up to and including the secondary combustion zone is preferably 0.70 to 0.90. A burner adapted for such a method is also disclosed, which has a duct for secondary fuel (15) concentrically within an inner annular duct (13) for primary fuel and an outer annular duct (14) for primary air. [Fig. 3]
International Flame Research Foundation
Knill Kevin J.
Ridout & Maybee Llp
LandOfFree
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