DOSING AND MIXING ARRANGEMENT FOR USE IN EXHAUST AFTERTREATMENT

摘要

A dosing and mixing arrangement including an exhaust conduit (13) defining a central axis; a mixing conduit (30) positioned within the exhaust conduit; a dispersing arrangement (40) disposed at the upstream end of the mixing conduit; an injector (50) coupled to the exhaust conduit and configured to direct reactants into the exhaust conduit towards the dispersing arrangement; and an annular bypass (B) defined between the mixing conduit and the exhaust conduit for allowing exhaust to bypass the upstream end of the mixing conduit and to enter the mixing conduit downstream of the mesh.