| 摘要 |
PURPOSE:To obtain a high recovery rate of a solid component with respect to a hardly filterable solid-liquid by using a filter cloth having a flocked filter layer consisting of ultrafine fibers of a specific size and compressing the solid-liquid by said filter cloth thereby obtaining cake of a specific thickness. CONSTITUTION:An endless filter cloth 4 on which a hardly filterable solid-liquid 3 having >=10<10>cm/g average specific resistance for filtration is traveled in a compressing section consisting of a transfer drum 1 under rotation at a specified speed and press rolls 2, 8. The solid-liquid 3 is compressed in a way as not to squeeze out from the end edges of the cloth 4 by which the liquid component is squeezed off. The cloth 4 is formed by covering the surface of a woven or knitted base material with flocks of ultrafine fibers of 0.1-15mu size obtd. by fluffing said base material and forming a filter layer by such flocks. The cake formed by the compression is transferred onto a transfer drum 1 and is then scrapped off and recovered by a scraper 5. The thickness of the cake in the stage of transfer is made 10-1.000mu. |
