Classifying – separating – and assorting solids – Sifting – With liquid treatment
Patent
1979-08-06
1981-02-24
Cuchlinski, Jr., William A.
Classifying, separating, and assorting solids
Sifting
With liquid treatment
210456, B07B 118
Patent
active
042526418
ABSTRACT:
A pressurized screen particularly adapted for screening paper making pulp includes a cylindrical screen plate mounted in a cylindrical casing and defining with it an annular chamber which receives unscreened pulp from which rejects are removed as the good pulp passes from the annular chamber through the screen plate. The axes of the screen plate and the casing are offset with respect to each other, forming an enlargement of the chamber which extends approximately from an inlet into the annular chamber to a rejects outlet which is diametrically opposite the inlet. A partition in the chamber extends parallel to the axes of the casing and screen plate from a position opposite the inlet to a position above the rejects outlet. The partition is spaced from the opposing inner and outer surfaces of the screen and casing, respectively, and a baffle is provided which extends co-extensively with the partition and slopes helically downwardly about the screen plate from the inlet to the rejects outlet and defines with the partition, the screen plate and a floor of the chamber, a passage of decreasing cross-sectional area. Inlets are also provided for adding dilution liquid to the passage upstream of the rejects outlet and a purging liquid just upstream of the rejects outlet.
REFERENCES:
patent: 3174622 (1965-03-01), Lamort
patent: 3394809 (1968-07-01), Hunter
patent: 3420373 (1969-01-01), Hunter
patent: 3581903 (1971-06-01), Holz
patent: 3784495 (1974-01-01), Holz
patent: 3898157 (1975-08-01), Hooper
patent: 4127479 (1978-11-01), Kurth et al.
Cuchlinski Jr. William A.
The Black Clawson Company
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