Förfarande och anordning för fraktionering av suspensioner

摘要

PCT No. PCT/SE89/00633 Sec. 371 Date Jul. 23, 1990 Sec. 102(e) Date Jul. 23, 1990 PCT Filed Nov. 7, 1989 PCT Pub. No. WO90/06396 PCT Pub. Date Jun. 14, 1990.A device for fractionating pulp suspensions has a series of vertical filter sheets attached to a horizontal shaft. Suspension is sprayed against the sheets to effect a separation of coarse and fine solids. Cleansing liquid is also sprayed against the sheets to keep the filter holes open and the fabric sheets are movable with respect to the sprays.