Air-fuel Ratio Intelligent Control in Coke Oven Combustion Process

The constant proportion of the combustion air-fuel ratio control results in low combustion efficiency and fault-prone, it's difficult to adapt to changes in complex working conditions. Application of intelligent technology of case-based reasoning and fuzzy control, intelligent energy saving air-fuel ratio control method is proposed. Based on current trends in working conditions and combustion process fault case, the typical faults are predicted with case-based reasoning technology in the combustion process. On this basis, the real-time air-fuel ratio revision is realized through case-based reasoning algorithm. The appropriate flue gas flow and flue suction are obtained based on fuzzy-PID temperature cascade control, the stability and optimal control of the combustion process is achieved. The practical running results indicate that the control error is less than 6% of the settled value with the proposed method. Intelligent control of air-fuel ratio is realized. Temperature fluctuation is reduced, so the method is effective.