| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device in which high concentration SO<SB>2</SB>gas is not generated in desulfurization of NOx occlusion/reduction catalyst. <P>SOLUTION: In the exhaust emission control device, the NOx occlusion/reduction catalyst 5 is disposed along an exhaust pipe 4, and fuel 8 can be added to an inlet side of the NOx occlusion/reduction catalyst 5. The exhaust emission control device comprises: a water spray means 18 disposed downstream of the NOx occlusion/reduction catalyst 5 and atomizing water 15 and spraying the water 15 into exhaust gas 3; and a mist catcher (a mist catch board 19, a rear wall part 20 of a desulfurization case 12, or a tail pipe 21) catching sulfuric acid mist downstream of the water spray means 18, and reacted with the sulfuric acid mist to form sulfide. <P>COPYRIGHT: (C)2007,JPO&INPIT |
