Method of discharging light-weight substances by abrupt change o

Details Method of discharging light-weight substances by abrupt change o Method of discharging light-weight substances by abrupt change o

1994-06-28

1995-12-12

Cooley, Charles E.

Imperforate bowl: centrifugal separators

With condition responsive means

For controlling drive of driven means within bowl

494 37, 494 53, B04B 120

Patent

active

054745152

ABSTRACT:
When a screw-conveyor centrifuge is turned off and its rotation speed diminishes to the point where the centrifugal force is smaller than the force of gravitation, the liquid ring formed inside the centrifuge bowl under the centrifugal force collapses, and a detrimental discharge of liquid takes place at the solids discharge of the centrifuge. In accordance with the method of this invention, the rotation speed of the centrifuge bowl (2) and/or of the screw conveyor (4) is briefly abruptly changed immediately before this critical rotation speed is reached, so that the liquid ring is caused to spiral toward the liquid discharge openings (5) at the other end of the centrifuge (1) by the screw helices (3) of the screw conveyor (4).

REFERENCES:
patent: 3494542 (1970-02-01), Craig et al.
patent: 5176616 (1993-01-01), Schlip et al.

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