Device for circulating a liquid received in a container having a stirring body with an aperture provided on the stirring body

摘要

A device for circulating a liquid received in a container, in particular for circulating wastewater received in a tank, has a hyperboloid-like or truncated cone-like stirring body mounted on a vertical shaft, wherein a plurality of transport ribs extending from the peripheral edge in the direction of the shaft are provided on an outer side of the stirring body, a centerline between two adjacent transport ribs is defined by points of equal minimum distance from each crest line of the two adjacent transport ribs, an aperture is provided in the stirring body between the two transport ribs, and an aperture area delimited by the edge of the aperture has a geometric center of gravity. The geometric center of gravity of the aperture area is disposed in a region between the centerline and the crest line of one of the two transport ribs.