| 主权项 |
1. A gaseous reductant injection and mixing system, comprising:
an injector for injecting a gaseous reductant into an exhaust gas stream, the injector comprising:
an outer injection tube, a plurality of apertures defined in the outer injection tube through which the gaseous reductant is injected into an exhaust gas stream,an inner injection tube concentric with the outer injection tube and circumscribed within the outer injection tube, the plurality of apertures also defined in the inner injection tube, anda reductant supply tube fluidly coupled to the inner injection tube and the outer injection tube, the reductant supply tube extending through the outer injection tube and the inner injection tube so as to bisect each of the inner injection tube and the outer injection tube, the reductant supply tube including reductant inlets positioned on opposite ends of the reductant supply tube to insert reductant from opposite ends of the reductant supply tube; and a mixer attached to a surface of the injector, the mixer comprising a plurality of fluid deflecting elements. |
