Method of recovering fibers from a reject stream generated in a

Details Method of recovering fibers from a reject stream generated in a Method of recovering fibers from a reject stream generated in a

1997-03-26

1999-03-16

Silverman, Stanley S.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 55, D21B 108

Patent

active

058824758

ABSTRACT:
Rejects from a conventional first set of cleaners from a system feeding recycled cellulosic fiber slurry to a paper machine or rejects from the paper machine approach system cleaners are fractionated to produce a first, fine fraction, stream and a second, coarse fraction, stream containing most of the fiber and larger solids. The second stream is acted upon by a disperser, deflaker, or like mechanical agitating device, to disrupt the fiber flocs and reduce the size of solids to produce a third stream containing few or no fiber flocs and no large particles. The third stream may be diluted and cleaned in a second set of cleaners, and then is returned to the first set of cleaners (e.g. to the inlet of the first stage or between the first and second stages). Ink, and other fine undesirable particles may be removed from the first stream via flotation or cleaning, and the cleaned stream may also be returned to the first set of cleaners if desired.

REFERENCES:
patent: 4134827 (1979-01-01), Frykhult
patent: 5069751 (1991-12-01), Chamblee et al.
patent: 5131980 (1992-07-01), Chamblee et al.
patent: 5529190 (1996-06-01), Carlton et al.

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