FILTERVORRICHTUNG UND VERWENDUNG DER VORRICHTUNG

• Main Authors: PAATERO, JAAKKO, HENTTONEN, VESA, KARLSSON, CLAES, TEPPLER, MILAN, LEIMU, PASI
• Format: Patent
• Language: German
• Published: 15.12.2004
• Edition: 7
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

PCT No. PCT/FI97/00129 Sec. 371 Date Jan. 4, 1999 Sec. 102(e) Date Jan. 4, 1999 PCT Filed Feb. 26, 1997 PCT Pub. No. WO97/32652 PCT Pub. Date Sep. 12, 1997The invention concerns a method and a device for separation of separable constituents from a liquid medium. The separation device comprises only one cell or a stack of a plurality of adjacent cell, whereby each cell consists of a plate unit containing a filter, an inlet for supplying the liquid medium into a chamber, and outlet for discharging the reject and an outlet for discharging the permeate. The liquid medium is subjected to a strong turbulence created by a convenient designed rotor, possible combined with sound waves, whereby the deposition of separable constituents on the filter is prevented or essentially reduced. According to the invention a rotor is used in which the essentially plane surface of the rotor wings directed toward the filter comprises one or more areas deviating from the plane of said surface; or the surface of the rotor wings directed towards the filter is curved in such a way that the distance between the surface of the wing and the filer is small at the inner portion of the rotor and that said distance gradually increases towards the periphery of the rotor, or the section of the rotor wings in the plane parallel with the filter forms an almost S-shaped surface, whereby the S-shape is continuous.