Patent ID: 8807826

Claim:
Static mixing device, having a tubular flow duct which has a longitudinal axis and an inner diameter, having at least one mixing element which is arranged in the flow duct and which has a length and a diameter corresponding to the inner diameter of the flow duct, with the at least one mixing element having a multiplicity of webs which are arranged in a crossed fashion and which enclose an angle of greater than 0° with the longitudinal axis of the flow duct, with the webs being arranged in two intersecting plane groups which have a multiplicity of planes arranged parallel to one another and separated from one another by an equal spacing, and with mutually adjacent webs having an intermediate spacing in a projection of the two plane groups onto a projection plane situated perpendicular to the longitudinal axis of the flow duct, wherein the webs are of waisted design between adjacent crossing points, and in the middle between adjacent crossing points the webs have their smallest width and mutually adjacent webs have their greatest intermediate spacing, and those webs which are adjacent to the inner wall of the flow duct have, between face-side abutting edges, a recess which corresponds to the waisting of the webs and which has the smallest width so as to form a greatest wall spacing in the middle between the face-side abutting edges, with the sum, measured over the diameter of the at least one mixing element, of the smallest widths of the webs amounting to at least 35% of the diameter of the at least one mixing element.