MIXING MODULE FOR POST TREATMENT EXHAUST CONTAMINATION GAS DECREASING SYSTEM IN DIESEL ENGINE

摘要

The present invention relates to a mixing module for an exhaust gas post treatment system for a diesel engine, which injects a reducing agent into exhaust gas flowing from the rear of a DPF (20) and the front of an SCR (40) connected to a DOC (10) through the DPF (20) using an injector (32). The mixing module for an exhaust gas post treatment system for a diesel engine comprises: a cylindrical module body (31); a baffle plate (33) which makes a fixed interval be open from the internal surface of the module body (31) and vertically divides the internal space; a guide tube (34) whose both ends are included horizontally at a discharge port eccentrically formed on the cross section of the baffle plate (33) and the SCR (40) side, whose external surface has multiple penetrating holes (340) at regular intervals, where the injector (32) injects the reducing agent into one side of the external surface, and wherein a circular tube is formed to communicate with the discharge port; and a mixer (35) which is inserted into a connecting end unit (310) protruding to the outside in order to connect the discharge port of the module body (31) with the SCR (40), and whose body (350) in a grill shape has multiple blades (351) at regular intervals and at fixed angles so that the mixed exhaust gas passing through the blades can flow by forming a vortex. Therefore, the mixing module for an exhaust gas post treatment system for a diesel engine can maximize the purification efficiency of exhaust gas by significantly vitalizing the fluidity of the exhaust gas.