Prediction of reduction products in the preheating process

Under the current requirements of environmental protection, carbon peaking and neutrality goals, capacity new energy interconnection network is increasing day by day. The thermal power unit requires ability rapid load adjustment to meet real-time balance. However, when in a variable condition, denitrification system inefficient or even inoperable. nitrogen oxide emission large, which makes it difficult protection requirements. In this study, method for predicting reductive products preheating process proposed, introducing gasification mechanism into pulverized coal process. effects air coefficient on combustion temperature, velocity, O2, CO2, CO, CH4, H2, volatile matter NOx are investigated numerical simulation. It demonstrated that applicable predict reduction during preheating. Internal burners can stabilize precipitation matter, CO H2. burner outlet temperature flow rate decrease with decreasing coefficient. local maximum concentration CH4 8.3 vol% 2.54 respectively. increases under effect CO2 reaction. When 0.33, at 2.8 mg/Nm3 (@6% O2).