FLUE GAS DENITRATION DEVICE

摘要

An exhaust gas denitrizer according to the present invention removes nitrogen oxides from rejoined exhaust gas using a denitrification reactor after supplying ammonia gas to the rejoined exhaust gas made up of main exhaust gas cooled by a fuel economizer 22 by flowing through a main duct 16 and bypass exhaust gas 28 maintained at high temperature by flowing through a bypass duct 24 adapted to bypass the fuel economizer 22. In particular, at a meeting place between the main exhaust gas 26 and bypass exhaust gas 28 in the main duct 16, three partition plates 44 are installed with plate surfaces turned to an inflow direction of the bypass exhaust gas 28, partitioning a main exhaust gas channel into a plurality of sub-channels along a flowing direction of the main exhaust gas 26, where upstream-side ends of the partition plates 44 along an inflow direction of the main exhaust gas 26 face the incoming bypass exhaust gas 28 by being shifted from one another toward an upstream side of the main exhaust gas 26 starting from an inflow side of the bypass exhaust gas 28. This makes it possible to even out temperature of the rejoined exhaust gas quickly while curbing increases in duct pressure losses.