Full jacket-worm centrifuge

Claim 1

A full jacket-worm centrifuge for continuous separation of water-sludge mixtures, comprising: an approximately cylindrical drum jacket having a cylindrical section and a conically tapered section with a solid matter discharge at an end thereof, and a worm conveyor having cylindrical and conical portions arranged coaxially therein; a slurry inlet for the drum jacket at an end wall thereof opposite the solid matter discharge; a drive means for the drum jacket and worm conveyor; at least one liquid drainage opening as a liquid separation product discharge arranged in an axial direction between the slurry inlet and the solid matter discharge substantially at a transition from the cylindrical section to the conically tapered section; at said transition and between said liquid drainage opening and said solid matter discharge a cross-sectional constriction being provided comprising a retarding plate extending radially to a point spaced from an interior side of the drum jacket at said transition; an exterior opening in the drum jacket and channel means connecting the liquid drainage opening to the exterior opening for conveying liquid thereto in a direction substantially opposite a transport direction of the solid matter and along and adjacent to said worm conveyor; means for control of at least one of a differential speed between the drum jacket and worm conveyor or solid matter quantity supplied per unit of time to the centrifuge according to at least one of the operating parameters including torque of the worm conveyor, solid matter concentration in the solid matter discharge, or solid matter concentration in the liquid separation product discharge.