The correlation between the air flow rate variation at furnace inlet and combustion state in the furnace

as well as the flue gas temperature at furnace outlet has been analysed.Based on this

the affecting regularity of air flow rate variation at furnace inlet upon the flue gas temperature at furnace outlet under condition of oxygen deficient combustion and oxygen non-deficient combustion has been studied

and the results of analysis being proved through concrete examples.Results show that the affecting degree of air flow rate variation at furnace inlet upon the flue gas temperature at funace outlet to be different under condition of oxygen deficient and oxygen non-deficient combustion

as well as under high load and low load.