Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1986-08-27
1989-04-04
Schor, Kenneth M.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 55, 241 24, 241 28, D21B 132
Patent
active
048183385
ABSTRACT:
In a pulping apparatus including a pulper with a rotor near the bottom therein, the pulper has a sluice outlet at the bottom for acceptable pulp suspension. Above the rotor at a corner of the pulper is a second outlet for suspension and dirt. A conduit leads from the second outlet to a horizontally oriented withdrawal apparatus chamber having a suspension agitating rotor at the end of the chamber opposite the entrance for pulp thereinto. A tangential outlet from the withdrawal apparatus chamber lead to a rotary, perforated sorting drum which permits exit of acceptable suspension and which has a rejected suspension and dirt outlet. A valve in the inlet to the withdrawal apparatus chamber is periodically and cyclically opened to permit periodic replacement of the suspension in the withdrawal apparatus chamber, and the suspension which has been agitated in the withdrawal apparatus chamber then moves to the sorting drum.
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Koffinke, "Pulping Developments in the Secondary Fiber Field", Proceedings of the 1980 Tappi Annual Meeting, vol. 63, No. 11, at 51-54 (Nov. 1980).
Bahr Theodor
Musselmann Walter
Thumm Helmut
Hastings K. M.
J. M. Voith GmbH
Schor Kenneth M.
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