UREA FEEDING SYSTEM FOR SCR SYSTEM

摘要

Disclosed is a urea feeding system which feeds a urea aqueous solution to an SCR catalyst side installed in a middle of an exhaust line in an SCR system. The urea feeding system comprises: a urea tank wherein the aqueous urea solution is stored; a circulation line connected to the urea tank; a circulation pump to circulate the aqueous urea solution along the circulation line via the urea tank; a nanobubble generating means to form gas supplied from the circulation line into nanobubbles to feed the nanobubbles into the urea tank; a pumping means to pump the aqueous urea solution including the nanobubbles; and an injection nozzle to receive the aqueous urea solution including the nanobubbles from the pumping means to inject the aqueous urea solution to a front end of the SCR catalyst.