Flue gas recirculation for no _reduction in premix burners

Details Flue gas recirculation for no _reduction in premix burners Flue gas recirculation for no _reduction in premix burners

F - Mech Eng,Light,Heat,Weapons

23

C

F23C 9/00 (2006.01)

Patent

CA 2096414

A method and apparatus for reducing NOx emissions from premix burners by recirculating flue gas. Flue gas is drawn from the furnace through a pipe or pipes (36, 38, 56, 76) by the aspirating effect of fuel gas and combustion air passing through a venturi portion (19) of a burner tube (12). The flue gas mixes with combustion air in a primary air chamber (26, 78) prior to combustion to dilute the concentration of °2 in the combustion air, which lowers flame temperature and thereby reduces NOx emissions. The fluw gas recirculating system may be retrofitted into existing premix burners or may be incor- porated in new low NOx burners.

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