Fuel gas preheat for excess oxygen maintenance

Details Fuel gas preheat for excess oxygen maintenance Fuel gas preheat for excess oxygen maintenance

F - Mech Eng,Light,Heat,Weapons

23

N

158/18

F23N 5/18 (2006.01) F23N 1/02 (2006.01) F23N 5/00 (2006.01)

Patent

CA 1117860

ABSTRACT OF THE DISCLOSURE A system for the preheating of gaseous fuels being fed to a furnace, the fuels having a wide range of molecular weights, and correspond- ing calorific values, in which all of the combustion air is provided by inspiration, due to the flow energy of the fuel. The invention involves the monitoring of oxygen in the products of combustion moving from the fur- nace to the stack, or, alternatively, monitoring the molecular weight of the fuel on the inlet line, and controlling the preheating of the fuel in a heat exchanger, so as to maintain a selected temperature of the fuel going to the burners, in accordance with the molecular weight of the fuel.

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