Process and apparatus for sludge and scum extraction

Details Process and apparatus for sludge and scum extraction Process and apparatus for sludge and scum extraction

B - Operations, Transporting

01

D

B01D 17/02 (2006.01) B01D 21/00 (2006.01) C02F 1/40 (2006.01)

Patent

CA 2320659

A sludge extraction apparatus including a sedimentation tank; a float; a catch tank with an overflow rim, which runs partially or completely around the float; a mixing unit to generate a fluid flow pattern within the sedimentation tank which provides a fluid flow at the surface of the water towards the catch tank; and a conveyor, which conveys the sludge, overflowing into the catch tank, through an outlet line. The flow generated by the mixing unit moves the scum on the surface of the water to the catch tank, where the scum can be collected. By controlling the mixing unit, the fluid flow can be selected to convey only the light weight particles in the sludge, so that the scum and the light--weight sludge partitions can be extracted selectively and from over a large area. The sludge extraction apparatus is conveniently located in the sedimentation tank by a parallelogram linkage.

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