F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
F02B 47/04 (2006.01) F02B 49/00 (2006.01) F02B 51/00 (2006.01) F23D 17/00 (2006.01) F23D 23/00 (2006.01) F23R 3/34 (2006.01)
Patent
CA 2124762
ABSTRACT OF THE DISCLOSURE An ultra-low NOx gas turbine combustor having a dual fuel capability. The combustor has a pre-mixing zone and a downstream combustion zone. The pre-mixing zone has three concentric annular passages that surround a central diffusion- type dual fuel nozzle. A gas fuel manifold distributes gas fuel around the inner and outer passages. A plurality of dual fuel nozzles are disposed in the middle passage to distribute either gas or oil fuel around the middle passage. The distribution of fuel around the passages allows the formation of lean fuel/air ratios, thereby lowering NOx formation. In addition, swirl vanes are arrayed around the inner and outer passages and around each of the fuel nozzles. A step increase in the flow area in going from the pre-mixing zone to the combustion zone creates vortices that tend to anchor the flame.
Foss David T.
Pillsbury Paul Walter
Bereskin & Parr
Westinghouse Electric Company
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