Method and apparatus for screening waste paper pulp

Details Method and apparatus for screening waste paper pulp Method and apparatus for screening waste paper pulp

1994-10-04

1996-10-15

Bollinger, David H.

Classifying, separating, and assorting solids

Treatment subsequent

209268, 209273, 241 4617, B07B 104

Patent

active

055645720

ABSTRACT:
Waste paper stock pulp slurry supplied through a stock inlet is separated at screening sections to a high quality stock and a reject containing contaminants and undefibered waste paper. The high quality stock is sent to a next stage as accept. The reject is sent to a defibering section and is diluted after defibration, part of the reject being circulated to the screening sections, the remainder being discharged out of the system through a reject outlet. Provision of screening and defibering sections in one and the same screen can satisfy contradictory requirements, i.e., to increase contaminant removing efficiency, to raise production yield and to attain space- and cost-saving.

REFERENCES:
patent: 3437204 (1969-04-01), Clarke-Pounder
patent: 4165841 (1979-08-01), Musselmann et al.
patent: 4699324 (1987-10-01), Ahs
patent: 5119953 (1992-06-01), Atkeison, III et al.
patent: 5176261 (1993-01-01), Holz
patent: 5299747 (1994-04-01), Satomi

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