Methods and apparatus for gas combustion

Details Methods and apparatus for gas combustion Methods and apparatus for gas combustion

F - Mech Eng,Light,Heat,Weapons

23

D

F23D 14/58 (2006.01) F23D 14/04 (2006.01) F23D 14/64 (2006.01)

Patent

CA 2086534

In a method of combustion designed to achieve a further reduction in harmful emissions, especially of NOx and CO, which is viable at advantageously reduced noise levels and lower cost with any burner of a type comprising a slot- ted or pierced diffuser of thin sheet metal in receipt of fully or partly mixed gas and air supplies, typically in appliances comprising a heat exchanger such as the boilers of central heating systems, the essential steps are: a) supplying a uniform flow of fuel-air mixture to the slots; b) discharging the mixture from a pierced surface of substantially doughnut geometry comprising a slotted peripheral area (Ap) and an essentially solid central area (Ac) of prescribed proportions; c) bringing combustion to completion in a slender lamellar flame; d) regulating the rate of aeration to a value between 0.9 and 1.4, or e) to values less than 1.6; f) ef- fecting a recycle of post-combustion gases.

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