Patent ID: 7762404
Filing Date: 2010-07-27
Classification: B01D

Abstract:
1. An apparatus for separating crystals from their suspension in contaminated crystal melt with purification, comprising: a hollow cylindrical column that bounds a concentration zone and a wash zone, wherein the hollow cylindrical column has a central axis; one or more filter tubes extending through the column from a first end of the column parallel to a cylinder axis; at least one filter that forms an only direct connection between an interior of the filter tube and an interior of the column being mounted in a wall of the filter tube; a concentration zone being terminated at the first end of the column which is opposite the at least one filter by a tray having orifices; a first part of the orifices of the tray being continued into the filter tube and simultaneously into an apparatus for removing contaminated crystal melt; a second part of the orifices of the tray being connected to a distributor space into which the crystal suspension to be separated is fed; and wherein the column opens, at its second end opposite the first end, into a zone for melting crystals that have been separated off, which zone has an outlet for removing a portion of the molten crystals separated off, and wherein an interior of the distributor space is equipped with at least one distributor aid, and wherein the column, in the concentration zone and in the wash zone, comprises a central displacer body coaxial with said central axis.