Patent ID: 8201697
Filing Date: 2012-06-19
Classification: B01D,B04C,C02F

Abstract:
1. A hydroclone comprising: a tank having an internal chamber defining a central axis, a fluid inlet, a filtered fluid outlet and an effluent outlet and a filter positioned within the internal chamber of the tank that defines a filtered fluid chamber within the internal chamber of the tank, wherein the filter has a run portion comprising a run face extending substantially perpendicular to the central axis, and a rise portion comprising a rise face extending substantially parallel to the central axis wherein the rise portion comprises a multiplicity of pores arranged to permit fluid to flow substantially radially into the filtered fluid chamber from outside the filtered fluid chamber, wherein the pores are formed as elongated slits in the external surface of the filter, wherein the fluid inlet is arranged such that fluid entering the chamber through the fluid inlet flows into a region between the chamber wall and the filter, the filtered fluid outlet is arranged to discharge filtered fluid that has passed through the filter, the effluent outlet is arranged to discharge a concentrated effluent that has generally not passed through the filter, and the hydroclone is arranged such that during operation a vortex of flowing liquid is formed between the chamber wall and the filter with the filter located substantially in the center of the vortex and such that the filter acts as a cross-flow filter with the flowing liquid transversely crossing the elongated slits.