DENITRATION APPARATUS, COMBUSTION APPARATUS AND METHOD OF OPERATING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a denitration apparatus, a combustion apparatus and a method of operating the two capable of controlling ammonia injection amount and air flow rate according to denitration efficiency. SOLUTION: A method of operating a denitration apparatus for controlling NOx in the denitration apparatus by controlling a control input for ammonia or an ammonia simulant (hereinafter, referred to as ammonia) to be injected into a denitration apparatus on the basis of an NOx concentration is characterized in that concentration of total NOx and concentration of one or a plurality of particular nitrogen oxides are detected, concentration ratio of the concentration of one or a plurality of the particular nitrogen oxides to the concentration of the total NOx is calculated, denitration efficiency of the denitration apparatus is estimated and a preceding control of injection amount of the ammonia is performed according to change of the estimated deritration efficiency or a calibration control of supply amount of an oxygen containing gas to be supplied into a combustion apparatus is performed according to the concentration ratio.