| 摘要 |
The 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 cells, whereby each cell consists of a plate unit containing a filter (13), an inlet (l6) for supplying the liquid medium into a chamber (10), an outlet (1 8) for discharging the reject and an outlet (17) for discharging the permeate. The liquid medium is subjected to a strong turbulence created by a conveniently designed rotor, possibly combined with sound waves, preferably ultrasound, and/or an electric field, 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 towards the filter comprises one or more areas (20) deviating from the plane of said surface; or the surface (19) 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 filter is small at the inner portion of the rotor and that said distance gradually increases towards the periphery of the roto r, or the section of the rotor wings in a plane parallel with the filter forms an almost S-shaped surface, whereby the S-shape is continuous.< /SDOAB>
|
