REDUCING AGENT SUPPLY METHOD AND REDUCING AGENT SUPPLY DEVICE FOR INCINERATOR

摘要

PROBLEM TO BE SOLVED: To provide a reducing agent supply method that can always obtain a high denitrification rate while suppressing a leak ammonia concentration by predicting nitrogen oxides.SOLUTION: There is provided the method that calculates an ammonia supply amount F from a supply nozzle 31 on a denitrification part entrance side using an exhaust gas amount from an exhaust gas processing path part 3 and also finding a supply amount F' of ammonia based upon an ammonia supply concentration corresponding to the regulation value of ammonia concentration of an incinerator 1 so that a NOx concentration in exhaust gas discharged from the incinerator 1 is equal to or less than a target value, and supplies the ammonia with the ammonia supply amount F' based upon the regulation value when the ammonia supply amount F based upon the exhaust gas amount exceeds the ammonia supply amount F' based upon the regulation value when the ammonia is supplied with an ammonia supply amount F found based upon the exhaust gas amount.