Sludge e.g. plugging or/and sticky sludge, lift for water purification station, has motorized system driving screws in rotation, where sludge admitted in lower end of slot is repressed in upper end of slot when screws are rotated

摘要

The lift (1) has two helicoidal screws e.g. Archimedes screws, arranged parallel with each other and imbricated one on another in axes. The screws are spaced at a distance lower to half of sum of external diameters of the screws, where the screws are surrounded by an oblong section duct or trough (3). A motorized system e.g. electrical motor (10), drives the screws in rotation, where sludge admitted by a lower end of the slot is repressed in an upper end of the slot, when the screws are rotated.