INSTALLATION FOR FLOCCULATING COAGULABLE SUSPENSIONS, IN PARTICULAR FOR CLEANING THE BACKWATER FROM DE-INKING PLANTS USED FOR WASTE-PAPER PREPARATION

摘要

An apparatus to flocculate coagulable substances in suspensions as are used in particular for purifying the backwaters from de-inking plants used in waste-paper preparation, has a tank (4) to which the suspension containing flocculating agent and air is supplied from a reservoir (1) through a line (2). The tank (4) contains a rotor with a vertical shaft (34), from which two arms (35, 36) at different levels extend outwards. The suspension that is to be purified is supplied through the shaft (34) and the upper arm (36) and the clear water is scooped up through the lower arm (35) that subtends an acute angle with the upper arm (36). The substances that rise to the surface and float are removed from the surface in the form of scum (8), optionally with a transport system (40) through a sludge line (18, 42).