Reverse hydrocyclone cleaner for removing light contaminants fro

Details Reverse hydrocyclone cleaner for removing light contaminants fro Reverse hydrocyclone cleaner for removing light contaminants fro

1986-11-19

1989-01-10

Reeves, Robert B.

Classifying, separating, and assorting solids

Magnetic

Paramagnetic

55449, 554591, 2105121, B01D 300

Patent

active

047972033

ABSTRACT:
A reverse hydrocyclone cleaner for removing light contaminants from pulp slurry has a housing defining a hydrocyclone separating chamber. Pulp slurry is fed into the separating chamber adjacent an upper end thereof to form an outer helically and downwardly moving slurry stream relatively free from light contaminants, an inner pulp stream containing a substantial amount of the light contaminants and an air core within the inner stream. An overflow orifice is located adjacent an upper end of the separating chamber, and an underflow orifice is located adjacent a lower end of the separating chamber to remove the outer pulp stream relatively free from light contaminants. A centrally located blocking finger is located in the underflow orifice. The outer pulp stream passes around the blocking finger, which has a substantially flat upper surface of sufficient diameter to define lower limits of both the air core and the inner pulp stream and cause the inner pulp stream containing a substantial amount of the light contaminants to travel upwardly in the separating chamber in a helical manner around the air core to and through the overflow orifice.

REFERENCES:
patent: 2757581 (1956-08-01), Freeman
patent: 3425545 (1969-02-01), Zemanek
patent: 3512651 (1970-05-01), Laval, Jr.
patent: 3543932 (1970-12-01), Rostatter
patent: 3802570 (1974-04-01), Dehne
patent: 3912579 (1975-10-01), Braun
patent: 3928186 (1975-12-01), Zemanek
patent: 4163719 (1979-08-01), Macierewicz
patent: 4305825 (1981-12-01), Laval, Jr.
patent: 4676809 (1987-06-01), Fjallstrom et al.
"Theory, Applications and Practical Operation of Hydrocyclones" e/mj, Dr. H. Trawinski, Sep. 1976, pp. 115-127.

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