D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 9/18 (2006.01) D21D 5/16 (2006.01) D21F 1/66 (2006.01) D21F 1/74 (2006.01)
Patent
CA 2047749
2047749 9010110 PCTABS00002 The present invention relates to a method and apparatus, the purpose of which is to separate more efficiently than hitherto liquid from liquid/fiber suspension by dividing the suspension into two portions, of which one includes mainly liquid and the other both fibers and liquid. The method and apparatus in accordance with the invention may especially well be applied to the thickening of low consistency (0.5 - 5 %) fiber suspensions in pulp and paper industry. The thickening method in accordance with the invention is characterized in that micro turbulence is generated on the filter surface by means of the filter surface, by which thickened fiber matting on the surface is dispersed or the generation thereof is prevented. The thickening apparatus in accordance with the present invention is again characterized in that unevennesses (24) are arranged on the filter surface (23), which together with the kinetic speed of the fiber suspension generate micro turbulence of high intensity, by which the fiber matting tending to form in close proximity to the filter surface (23) is dispersed to optimize the thickening process.
Henricson Kaj
Makela Mika
Pikka Olavi
Ahlstrom (a.) Corporation
Gowling Lafleur Henderson Llp
Henricson Kaj
Makela Mika
Pikka Olavi
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