REDUCING AGENT DOSING MODULE AND SELECTIVE CATALYST REDUCTION SYSTEM USING THE SAME

摘要

A reducing agent dosing module of the present invention comprises: an injector having a nozzle tip for spraying a reducing agent and a spray surface on which the nozzle tip is mounted; a gasket which is placed between a mounted end portion of a mixing pipe in communication with an exhaust pipe and the spray surface and prevents a leakage of exhaust gas; and an adapter which provide surface pressure to one side of the gasket by being interposed between the gasket and the spray surface of the injector or between the gasket and the mounted end portion of the mixing pipe where the spray surface of the injector is spaced from the mixing pipe at a preset distance. The adapter can protect the nozzle tip from a heat damage by high heat through spacing the mixing pipe heated up by the nozzle tip of the injector and the exhaust gas. In addition, the adapter can sufficiently cool the nozzle tip having a structure cooled by an air-cooled.