DENITRATION OF EXHAUST GAS FROM GARBAGE INCINERATOR

摘要

PURPOSE:To attain to enhance a denitration efficiency and to lower cost, by cooling exhaust gas having received non-catalytic denitration and applying electric precipitation to said gas before performing catalytic denitration. CONSTITUTION:A reducing agent is added to the place, which is a high temp. region (750-950 deg.C) havig no flame present therein and can sufficiently take a stay time, of a garbage incinerator 1 to perform non-catalytic denitration and the exhaust gas after denitration is treated by a cooling apparatus 2 and an electric precipirator 3 while the treated gas is again denitrated by the catalytic reaction apparatus 4 provided to post-stage of said precipitator 3. Because the concn. of NOx in the exhaust gas entering the apparatus 4 is already lowered, the catalytic reaction apparatus can be made small and the use amount of the catalyst can be suppressed.