Method of discharging light-weight substances by abrupt change of rotational speed of a screw conveyor centrifuge component
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United States of America Patent
Stats
-
Dec 12, 1995
Grant Date -
N/A
app pub date -
Jun 28, 1994
filing date -
Jul 1, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
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).
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