Low nox burner

Details Low nox burner Low nox burner

F - Mech Eng,Light,Heat,Weapons

23

D

F23D 14/62 (2006.01) F23C 6/04 (2006.01) F23C 7/00 (2006.01) F23C 9/00 (2006.01) F23C 9/06 (2006.01) F23L 7/00 (2006.01)

Patent

CA 2135772

2135772 9421357 PCTABS00033 A low NOx burner combustion system (10) which may be adjusted for optimum burn rates, temperature and oxygen levels. The burner incorporates a plurality of gas nozzles (34, 36, 38) which individually inspirate a portion of the combustion air and a spin vane diffuser (20) to rotate and mix the gases within the primary combustion zone. The diffuser (20) is axially adjustable in order to vary the distance between the vane (20) and the first combustion zone while the blades of the diffuser (20) can be angularly adjusted to optimize the rotation and mixing of the gases. Air for combustion is supplied through a passage (16) to create distinct combustion zones for complete combustion. The flow rate of the combustion air is controlled through a damper (14) in accordance with the burn characterisitics. Further reductions in noxious emissions are accomplished by recirculating flue gases and mixing such gases directly with combustion fuel prior to introduction into the combustion chamber through eductor nozzles (34, 36, 38). Still further reductions are attained by mixing a secondary compound such as water or a chemical into the recirculated flue gases to optimize burn levels thereby reducing emissions.

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