Classifying – separating – and assorting solids – Plural – diverse separating operations – Aqueous suspension and sifting
Patent
1977-03-14
1978-08-15
Lutter, Frank W.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Aqueous suspension and sifting
209211, 209273, B04C 900
Patent
active
041070330
ABSTRACT:
An apparatus for cleaning fibrous suspensions of low stock consistency comprising, in combination, a specially adapted vortex cleaner and pressure screen. The vortex cleaner has a cone angle of less than 20.degree., between 7.degree. and 15.degree. in a preferred embodiment, to increase the residence time therein. The pressure screen comprises a rotor having a lower surface with acceleration elements to set the suspension in motion within the vortex cleaner while effectively sealing the space between a stationary screen basket and the rotor of the pressure screen to prevent short-circuiting of the fibrous suspension directly from the vortex cleaner inlet into the pressure screen. The rotor has a central opening in the lower surface thereof to accept the suspension leaving the vortex cleaner and further comprises peripheral openings in flow communication with this central opening through which the suspension passes to enter the annular space between the rotor and the screen basket.
REFERENCES:
patent: 2377524 (1945-06-01), Samson et al.
patent: 2701642 (1955-02-01), Goodwin
patent: 3172844 (1965-03-01), Kurz
patent: 3276583 (1966-10-01), Carr
patent: 3964996 (1976-06-01), Holz et al.
Hermann Finckh Maschinenfabrik
Hill Ralph J.
Lutter Frank W.
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