Study on the generation law of products and economy of oxygen-deficient combustion

In response to the optimization requirements of low nitrogen combustion in gas heating furnaces, this study proposes a collaborative control method based on under oxygen combustion, which actively controls the excess air coefficient α (0.92∼1.08) to balance fuel utilization and pollutant treatment costs. Through a combination of numerical simulation and experimental verification, this study systematically analyzes the generation laws and economic characteristics of combustion products under oxygen-deficient conditions. It was found that a decrease in alpha leads to incomplete combustion of fuel, which reduces furnace thermal efficiency but significantly alters the pathway of pollutant generation. When α<0.94, the concentration of soot and CO increases significantly, creating a strong reducing atmosphere and inhibiting NO x generation; By quantifying the game relationship between fuel cost increment and NO x end treatment cost (ammonia injection cost, equipment investment), it was found that when α=0.94∼0.96, NO x emissions are relatively low, meeting environmental requirements. Moreover, due to the chain like inhibitory effect of reducing substances on NO x , the consumption of denitrification agents can be reduced. The innovation of this study lies in revealing the inherent logic of "replacing treatment costs with fuel loss" in oxygen deficient combustion, providing theoretical support for industrial furnaces to choose a composite strategy of "moderate oxygen deficiency end reduction" under environmental constraints.