Classifying – separating – and assorting solids – Sifting – With liquid treatment
Patent
1995-01-26
1996-10-22
Terrell, William E.
Classifying, separating, and assorting solids
Sifting
With liquid treatment
209300, 210413, B07B 104, B07D 2102
Patent
active
055668330
ABSTRACT:
A pressure sorter for fiber suspensions, and a process for the preparation of fiber suspensions, are disclosed wherein a rotor is disposed concentrically within a cylindrical screen that has spaced circumferential rows of narrow through slots through which a portion of the fiber suspension fed into the screen passes radially outward to an accepts chamber external to the screen. The fraction of the suspension which does not pass through the screening slots passes axially out of the screen cylinder as a "rejects" flow. V-shaped grooves around the inflow ends of the screening slots create turbulences in the adjacent suspension material. The rotor includes external profiled elements which generate positive and negative pressure pulses at the adjacent inflow side of the screen as the rotor is rotated. Each profiled element has a front flank approximately parallel to the screen axis and a trailing flank which slopes radially inward of the screen, whereby the front flanks create pressure pulses in the fiber suspension adjacent the inflow ends of the screening slots and the trailing flanks cause suspension to be drawn back through the screen slots. To reduce the risks of cracking of the screen, the number and configuration of the profiled elements, the thickness of the screen, and the flow rates of the suspension through the pressure sorter are correlated such that throughput rates of the fiber suspension do not exceed
REFERENCES:
patent: 3400820 (1968-09-01), Nelson
patent: 3581903 (1971-06-01), Holz
patent: 3680696 (1972-08-01), Morin
patent: 3726401 (1973-04-01), Bolton, III et al.
patent: 3912622 (1975-10-01), Bolton, III et al.
patent: 3964996 (1976-06-01), Holz et al.
patent: 4043919 (1977-08-01), Hutzler
patent: 4155841 (1979-05-01), Chupka et al.
patent: 4200537 (1980-04-01), Lamort
patent: 4276159 (1981-06-01), Lehman
patent: 4410424 (1983-10-01), Chupka et al.
patent: 4529520 (1985-07-01), Lampenius
patent: 4744894 (1988-05-01), Gauld
patent: 4855038 (1989-08-01), LeBlanc
patent: 5000842 (1991-03-01), Ljokkoi
patent: 5110456 (1992-05-01), LeBlanc
patent: 5147543 (1992-09-01), Frejborg
patent: 5192438 (1993-03-01), Frejborg
patent: 5307939 (1994-05-01), Young et al.
patent: 5476178 (1995-12-01), Lamort
Czerwoniak Erich
Pfeffer Jochen G.
HermannFinckh Maschinenfabrik GmbH & Co.
Nguyen Tuan
Terrell William E.
LandOfFree
Pressure sorter for fiber suspensions as well as a process for t does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure sorter for fiber suspensions as well as a process for t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure sorter for fiber suspensions as well as a process for t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2352690