| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas after-treatment device whose size reduction is achieved while uniformly dispersing a reducing agent into exhaust gas in an exhaust pipe including a curved section. <P>SOLUTION: A downstream side of a curved section 2a of an exhaust gas pipe 2 is provided with an SCR catalyst 4 which, with urea water injected from an injection nozzle 5 as a reducing agent, purifies NOX contained in an exhaust gas. Further, between the curved section 2a and the SCR catalyst 4 are provided dispersion members 21-23 for dispersing in the exhaust gas pipe 2 the urea water injected from the injection nozzle 5, and a mixer 31 for mixing the dispersed urea water into the exhaust gas. The injection nozzle 5 is positioned at a part on the upstream side of the dispersion members 21-23 and arranged at a part positioned on the outer circumference side of the curved section 2a, so that the injected urea water can impinge directly on the surfaces 21a-23a of the dispersion members 21-23. <P>COPYRIGHT: (C)2013,JPO&INPIT |
