EXHAUST PURIFIER

摘要

An exhaust purifier characterized by including a casing having multiple hierarchical pathways provided in its interior through partitioning of the interior so as for an exhaust pathway extending from an exhaust inlet to an exhaust outlet to be folded back at least once; a reducing catalyst capable of reduction purification of NOx with the use of a reducing agent; a nozzle for injecting of the reducing agent or a precursor thereof on the exhaust upstream side of the reducing catalyst; and a filter (DPF) for trapping of PM from the exhaust, wherein the reducing catalyst and the DPF are disposed in different hierarchical pathways. Thus, the exhaust purifier having, added thereto, both of the functions of PM trapping and NOx removal by SCR can be rendered increasingly compact.