Methods and apparatus for de-watering sludge
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United States of America Patent
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-
Jun 5, 2001
Grant Date -
N/A
app pub date -
Nov 22, 1999
filing date -
Nov 22, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for de-watering sludge. A main shaft is rotated about a longitudinal axis at a first rate. A screw shaft coupled to the main shaft is rotated about the longitudinal axis at the first rate. Screw flighting coupled to the screw shaft is rotated about the longitudinal axis at the first rate. A first and second stage drum are rotated about the longitudinal axis at a second rate. Sludge is introduced to a first area defined by an outer surface of the screw shaft and an inner surface of the first stage drum. Moisture is removed from the sludge through a first slot coupled to the first stage drum. The sludge is transported with the screw flighting from the first area to a second area defined by an outer surface of the screw shaft and an inner surface of the second stage drum, the second area being larger than the first area. Moisture is removed from the sludge through a second slot coupled to the second stage drum.
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