APPARATUS FOR PULPING AND SORTING WASTE PAPER

摘要

The leading drum, in the direction of used paper travel, has at least a generally solid cylindrical wall for mixing with water for softening and partial breaking up. The second drum also gives a partial breaking up action and sorts the fibre material. The sorting drum is divided into two sections, in the direction of material travel, each with a perforated cylindrical wall. The perforations in the wall of the first section are smaller than those in the second section. A suspension return system with a fibre reduction unit, lies between a trap for the suspension from the openings of the second section and a point between the two drums in front of the first sorting zone to return the matter.