Patent ID: 6627174
Filing Date: 2003-09-30
Classification: B01F,B01J,F04D

Abstract:
An apparatus for conveying a liquid containing dispersed gas in a downward direction comprising an axial conveyor, wherein said axial conveyor comprises conveying elements in a substantially cylindrical conveying tube, wherein said conveying elements are selected from a group consisting of propellers, vanes or screws disposed on a drivable axle, wherein said conveying elements comprise a wall-sweeping lip perpendicular to the conveying element and projecting in a direction corresponding to that of the axial conveyor's pressure side having a height relative to the conveying element's diameter of from 0.025 to 0.25, and wherein an additional conveying member is provided on the pressure side of said axle of said axial conveyor, the additional conveying member having a delivery cross-section of from &frac13; to &frac23; of the cross-section of the conveying tube, the additional conveying member being spaced from the axial conveyor's discharge end by a distance at least equal to the conveying tube's diameter.