Patent ID: 7135112

Claim:
A flocculation apparatus for treating colloidal suspensions, comprising a flocculation forming device comprising a suspension inlet, suspension outlet and an inner cone mounted centrally in a conical outer housing, at least one of the inner cone and the outer housing being rotatable relative to one another, and a gap for through-flow of suspensions being present between the inner cone and the outer housing, wherein at least one of the inner cone and the outer housing is mounted so as to be axially displaceable and an actuator cooperates with the at least one of the inner cone and outer housing for controlled axial displacement of at least one of the inner cone and outer housing, and the flocculation apparatus further comprising a mixer adapted for generating highly turbulent suspension flow, said mixer comprising a mixer suspension inlet and a mixer suspension outlet, a rotor, and connecting pieces distributed over the circumference of the rotor for feeding flocculant and/or flocculant auxiliary to said mixer, wherein the mixer suspension outlet is connected directly upstream of the suspension inlet of the flocculation forming device.