| 主权项 |
1. A screw conveyor for a centrifugal separator for separating at least a first phase and a second phase of a feed material with different densities, comprising:
a conveyor hub carrying at least one helical conveyor flight and providing at least one helical channel extending between a first and a second channel wall between adjacent turns of helical conveyor flight in a separation space, the screw conveyor rotating in use around an axis of rotation in a direction of rotation, said axis of rotation extending in a longitudinal direction, a radial direction extending perpendicular to the longitudinal direction, the screw conveyor having an up-stream end and a down-stream end; a feed inlet with at least one feed inlet opening provided in the conveyor hub for letting in feed material into the separation space through the feed inlet opening, at least two partition walls arranged in a side-by-side relation to divide at least a radial part of a length of said at least one helical channel into three sub-channels arranged in a side-by-side relation to cause a liquid flowing in the at least one helical channel to flow in an up-stream direction towards the up-stream end in an intermediate sub-channel and in an opposite down-stream direction towards the down-stream end in two adjacent sub-channels on either side of the intermediate sub-channel. |
