Boiler Economic Analysis and the Determination of Optimal Oxygen Content

In air supply and furnace pressure control system,change of oxygen content set point will cause boiler heat loss and change forced-draft-fan power consumption,which affect boiler efficiency.Improved incremental updating fuzzy association rule mining algorithm was proposed to solve the determination of optimal oxygen content when unit operation state changes.The analysis of the actual example of a 300MW unit shows that,compared with the normal data mining method,this algorithm has more quickly response and its efficiency can be improved 4~16 times,candidate itemsets can be reduced greatly as well as reduce the repeat calculation cost.The optimal oxygen content determined by this method can ruduce coal consumption rate effectively and increase unit operation efficiency.