Screw for a solid-bowl centrifuge and a method of extracting oil using the centrifuge
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United States of America Patent
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Jun 21, 2005
Grant Date -
Jul 10, 2003
app pub date -
Oct 18, 2001
filing date -
Nov 10, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A screw for a solid-bowl screw-type centrifuge, comprising: a screw body having a circumference, a cylindrical section and a conical section; at least one screw blade surrounding the screw body several times and forming several screw spirals; a delivery path for conveying material to be centrifuged formed between the screw spirals; blade segments arranged in the delivery path between adjacent screw spirals only in a portion of the cylindrical section; and recesses in the at least one screw blade, the recesses constructed only in a portion of the cylindrical section and constructed such that the material to be centrifuged can flow through between adjacent screw spirals. A method for extracting oil in a two- and three-phase separation process using the screw of the present invention.
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