EXHAUST PURIFICATION SYSTEM AND OZONE GENERATION DEVICE

摘要

PROBLEM TO BE SOLVED: To increase ozone generation efficiency of an exhaust purification system and an ozone generation device.SOLUTION: An exhaust purification system comprises: a selective reduction catalyst 21 which is installed on an exhaust passage 15 of an engine 11; a urea water supply device 22 which supplies urea water to the exhaust passage 15 at an upstream side of the selective reduction catalyst 21; an oxygen enrichment unit 38 which separates ozone source gas into high oxygen concentration gas and high nitrogen concentration gas; an ozone generator 31 which generates ozone in an ozone generation space using the high oxygen concentration gas; an ozone supply nozzle 32 which supplies the ozone to the exhaust passage 15 at the upstream side of the selective reduction catalyst 21; a vortex tube 41 which is arranged at a downstream side of the oxygen enrichment unit 38 and discharges the high nitrogen concentration gas, separated by and introduced from the oxygen enrichment unit 38, in a manner that separates the same into cool gas and warm gas; and a cooling device 40 which cools the ozone generation space by blowing the cool gas supplied from the vortex tube 41 to the ozone generator 31.