Selection of high dust environment and low dust environment Injector grid for catalytic reduction system

摘要

Method and arrangement 22 for feeding and mixing reductant into the exhaust gas FG flowing through the gas duct 14 and entering a selective catalytic reduction (SCR) reactor 18 arranged downstream of the arrangement 22. The subject arrangement 22 that reduces the accumulation of ash and similar particulates on the reducing agent nozzle 42 and provides a more uniform flow distribution of the reducing agent upstream of the SCR reactor 18 is a high dust environment and a low dust cycle It is useful in both environment.BACKGROUND OF THE INVENTION