The Prediction Method of SO2 Concentration in Sulfuric Acid Production Process Based on GA-ELM

Plenty of SO
₂
is generated in the productive process of sulfuric acid in chemical fertilizer industry. In order to improve the efficiency and accuracy of SO
₂
emission prediction, a new method combining extreme learning machine (ELM) and genetic algorithm (GA) for SO
₂
concentration prediction was proposed based on analyzing the influencing factors of sulfuric acid productive process. In order to avoid the influence on predicting effect of ELM by the randomness of input weight matrix and hidden layer deviation, GA was used to optimize the input weight matrix and hidden layer deviation, and the GA-ELM model for SO
₂
emission prediction was built. Case analysis was made using statistical data of sulfuric acid productive process in a chemical fertilizer factory. The result shows that the prediction on possibility of SO
₂
emission by GA-ELM model can be relatively accurate and effective.