F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
158/79
F23D 11/00 (2006.01) F23C 9/00 (2006.01)
Patent
CA 1173344
ABSTRACT The method of producing low NOx emissions in a two stage combustion system includes combusting in a first stage within a high velocity combustor with an air-fuel mixture at less than stoichio- metric while avoiding the introduction of any flue gas into the first stage. Thereafter, substantial volumes of recirculated flue gas from the exhaust stack of a process furnace are introduced dowmstream of the first stage. This gas has a high exit velocity into the process furnace where it reacts with the partially burnt fuels to produce ad- ditional products of combustion in a second stage. The apparatus includes a refractory lined process furnace defining a chamber or fire box therein, a flue gas stack exiting the furnace, a recirculated flue gas duct extending from the furnace and a combustor defining a combustion chamber mounted to the furnace. The preferred com- bustor includes a plurality of air nozzles positioned at the opposite end of the combustor from a fuel gun for directing combustion air in counterflow relationship to the fuel so as to create a toroidal vortex in the combustor chamber. Downstream of the air nozzles are a plurality of flue gas nozzles which extend adjacent the combustion chamber and throat thereof for directing flue gas or a flue gas- combustion air mixture through the throat into the process furnace at a high exit velocity.
387269
Process Combustion Corporation
Smart & Biggar
LandOfFree
Two stage low no.sub.x combustor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two stage low no.sub.x combustor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two stage low no.sub.x combustor will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1280919