DEVICE FOR MIXING GAS STREAM FLOWING THROUGH A DUCT AND A METHOD OF REDUCING NITROGEN OXIDES INCORPORATED IN COMBUSTION SYSTEM EXHAUST GASES WITH THE USE OF REDUCING MEDIUM WHEN THIS DEVICE IS EMPLOYED

摘要

For thorough mixing of a gas stream, in the channel (2) one or more sheet-like built-in equipment (1) is arranged, which with respect to the flow direction of the gas flow are inclined at an acute angle. The assembly-assisting piece (1) is in the form of a vortex-producing surface with around which flow occurs freely, against the flow directed front edges, of which the shape of both a in the direction of flow of the gas stream as well as a transversely running component. The assembly-assisting piece (1) has the basic shape of a trapezoid with two parallel edges of equal length, the short edge in the installed position of the flow direction of the gas stream, in a direction opposite to, and the long edge, with a sweep and is provided in the direction of flow has. The assembly-assisting piece (1), along three straight lines (3) are bent in such a way that, to the flow of the gas flow on both sides of a concave curvature (4) two convex regions (5) in the form of an omega (omega) are formed or of a w.