Method of treating and a disperger for disintegrating wood pulp, especially containing waste paper

A dispersing system for treating a wood-fiber pulp which contains a recycled paper, the dispersing system comprising a pulp shredder, means for introducing steam to the pulp shredder, and a dispenser for finely-dividing the wood-fiber pulp containing the recycled paper,

• said disperser including;
• a) a housing (10a) having an inlet for the introduction of the pulp to an inlet zone in a substantially axial direction;
• b) a rotor (11) which in the region of the inlet zone carries pump-vanes;
• c) a disk (12) which is carried by the rotor and which has a peripheral section provided with teeth (12a) which co-act with opposing teeth on a ring or disk which is rigidly mounted, in the housing (10a), for finely-dividing the pulp;
• and
• d) a finely-divided pulp outlet 16 having a connecting piece (10b), said connecting piece (10b) having a substantially rectangular cross-section an inner measurement of said connecting piece corresponding approximately to the diameter of the rotor disk (12) and a total width of the disperser in the region thereof occupied by the toothed disks;
• said dispersing system further comprising a screw-press (20) which is connected to the connecting piece of the finely-divided pulp outlet and which functions to advance the pulp, without separate departure of steam, towards one end of the screw-press;
• said one end of said screw-press being closed by means of a valve device (21) such that the pulp will be compacted to form a plug seal in the vicinity of said one end of the screw-press thereby to prevent escape of steam from the dispersing system.