| 摘要 |
PURPOSE: A reductant mixing device for an SCR(selective catalytic reduction) system is provided to improve mixture uniformity in exhaust gas and a reductant by having inner and outer blades which are twisted and inclined at first and second torsion angles. CONSTITUTION: A reductant mixing device(10) of an SCR system comprises first, second, and third ring-shaped rim portions(11,12,13), a plurality of inner blades(21), and a plurality of outer blades(22). An opening is formed in the first ring-shaped rim portion. The second ring-shaped rim portion is placed outside the first ring-shaped rim portion. The third ring-shaped rim portion is placed outside the second ring-shaped rim portion. The inner blades are placed in between the first and second ring-shaped rim portions and twisted by a first torsion angle. The outer blades are placed in between the second and third ring-shaped rim portions and twisted by a second torsion angle. The first, second, and third ring-shaped rim portions are concentrically placed. |
