F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
158/2
F23D 11/38 (2006.01) F23C 7/00 (2006.01) F23C 9/00 (2006.01)
Patent
CA 1043246
OIL BURNER FOR NOX EMISSION CONTROL ABSTRACT OF THE DISCLOSURE Method and apparatus for producing heat from a liquid fuel in an oil burner with a low Nox-gas effluent. A small relatively higher velocity stream of air is directed concentric about a divergent spray or stream of ignited fuel oil in a primary flame zone in such amount that only a minor portion of the fuel can be combusted in said primary flame zone. The air is directed in such manner as to produce toroidal fluid circulation pattern atomizing the liquid fuel and establishing a stable flame. A small amount of recir- culated flue gas (RFG) is immediately thereafter introduced concentrically about said primary flame zone in the general direction of fluid flow. Air is introduced concentrically thereabout in a secondary flame zone in the fluid flow path of said primary flame zone in at least sufficient quantity to burn the remaining combustibles. Oxides of nitrogen in the resultant effluent are suppressed by adjusting the amount of RFG and hence the flame composition and tempera- ture.
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