In order to develop the co-processing technology of VOCs in petrochemical heating furnace,the influence of different mixing ratio(0～2.1%)on the combustion characteristics of methane in the air side of coflow burner was studied by numerical simulation.The effects of propane blending ratio on temperature field distribution and nitrogen oxide emission were investigated under fixed fuel gas flow rate and fixed furnace heating rate with excess air coefficient of 1.2.The results show that both the temperature field distribution and the nitrogen oxide emission change with the propane blending ratio.However,compared with the fixed fuel gas flow conditions,both changes are small and combustion stability is better when the fixed heat inputs.
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