HEATING DEVICE FOR REDUCTANT SPRAY NOZZLE OF SCR SYSTEM

摘要

The present invention relates to a heating device for a reductant injection nozzle of an SCR system where a reductant is injected in a preheated state at the time of injecting the reductant into a mixing unit of a vent pipe through a reductant injection nozzle, thereby raising the temperature of the reductant to allow the reductant to be smoothly mixed with exhaust gas and evaporated. The heating device according to the present invention comprises: vent pipes (30) (32) which are connected to front and back surfaces of an SCR chamber (20) processing exhaust gas and allowing the exhaust gas to pass; The heating device according to the present invention comprises: vent pipes (30) (32) which are connected to front and back surfaces of an SCR chamber (20) processing exhaust gas and allowing the exhaust gas to pass; an injection nozzle (52) which is provided in the mixing unit (40), receives a reductant through a supply line (50), and injects the reductant; and a heating means (60) which is provided to raise the temperature of the reductant injected through the injection nozzle (52) outside the injection nozzle (52).