| 摘要 |
The utility model relates to an exhaust device, which is provided with a waste gas after-treatment system, at least one SCR (selective catalytic reduction)-catalytic converter (4) and at least one particle separator (or particle filter) (3). The waste gas after-treatment system is used for reducing nitrogen oxide and solid particles, the SCR-catalytic converters (4) are used for reducing nitrogen oxide, the particle separators (or particle filters) (3) are placed on upstream portions of the SCR-catalytic converters (4) and used for reducing solid particles, and a special proportioning device (5) for reducing agent (6) is disposed on upstream portions of the particle separators (or particle filters) (3). In order to realize precise distribution of the reducing agent (6) as simple as possible and eliminate reducing agent in elementarily filtered waste gas when the primarily filtered waste gas recycles, a special branch (9) for a waste gas recycle pipeline (8) is disposed on downstream portions of the particle separators (or particle filters) (3), a flow guiding plate (11) which is arranged in the same direction with waste gas flow in principle is disposed on a proportioning equipment area (5) of an exhaust pipeline, waste gas flow flowing through the particle separators (or particle filters) (3) are divided into two branches, including a first waste gas branch (12) richly containing the reducing agent and a second waste gas branch (13) lacking of the reducing agent, by the flow guiding plate (11), the flow guiding device (11) is preferably mounted in a spraying area of the reducing agent (6) (led in by the proportioning device (5)), and a hydrolysis catalytic converter (14) can be preferably mounted among the proportioning device (5) and the particle separators (or particle filters) (3). |
