Thickener

摘要

PCT No. PCT/SE89/00042 Sec. 371 Date Oct. 3, 1989 Sec. 102(e) Date Oct. 3, 1989 PCT Filed Feb. 3, 1989 PCT Pub. No. WO89/07003 PCT Pub. Date Aug. 10, 1989.A filter for thickening fiber suspensions or other liquids containing solid material includes a plurality of rotatable filter disks (3) mutually spaced in axial direction and adapted to be partially submerged in a liquid (5) to be filtered. Each filter disk includes a plurality of filter sectors (4) communicating with axial filtrate discharge ducts (2) at the outer peripheries of the filter disks (3) for removal of filtrate. The axial filtrate discharge ducts (2) are open to atmosphere at at least one end (2') thereof for the purpose of conducting air through these ducts into the interior of the filter sections to replace filtrate flowing out. Advantageously, there is communication between all axial filtrate discharge ducts through annular filter disk holders (1) carrying the filter sectors (4) of the filter disks.