Chemistry: physical processes
Patent
1976-04-01
1977-07-26
Krizmanich, George H.
Chemistry: physical processes
B04B 120
Patent
active
040377814
ABSTRACT:
This invention relates to centrifugal separators but more particularly to a solid bowl centrifugal separator for separating a coarse solids fraction, a fine solids fraction and one or two liquid fractions having different specific gravities from feed comprising a liquid-solids mixture. The present invention relates to a solid bowl centrifugal separator which comprises an elongated bowl tapered at both ends and mounted for rotation about an axis. Coaxially mounted within the bowl is a helical screw conveyor having portions of opposite pitch to transport each of the two solids fractions towards their respective discharge ports located in the tapered ends of the bowl. Means are also provided for the discharge from the bowl of two liquid fractions of differing specific gravity. Each of the fractions is discharged into separate segments in the collector casing. More efficient separation is accomplished and efficient separation may be achieved in a single centrifuging step where heretofore two or more consecutive centrifuging operations were required.
REFERENCES:
patent: 1710316 (1929-04-01), Laughlin
patent: 2054058 (1936-09-01), Laughlin
patent: 2919848 (1960-01-01), Howe
patent: 3501346 (1970-03-01), Katzen et al.
patent: 3885734 (1975-05-01), Lee
Krizmanich George H.
Pennwalt Corporation
Sager Edward A.
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