Andritz Ag

Andritz-patentverwaltungs-gesellschaft M.b.h.

Rudolf Stadlauer

Peter Scheucher

Dietmar Hausjell

Wolfgang Magor

Johannes Knafl

Roland Kanzler

Rupert Brunnsteiner

Peter Dipl-IngDr Scheucher

Roland Zuschnig

The invention relates to a screw press () comprising a shaft () and a spiral helix () provided thereon, wherein the helix () goes over in the inlet region () of the screw press () into a freely projecting helix (). It is principally characterized in that a tube () is provided in the inlet region () of the screw press (). As a result, on the one hand the screen area can be increased greatly in size, on the other hand the co-rotation of the suspension with the shaft can be reduced or avoided.

Screw press

Screw press for separation of liquid from solid liquid mixtures, especially pulp suspensions, with a casing with perforations for liquid and a screw shaft provided in it between which a circular gap is formed through which the solid liquid mixture is pressed. Furthermore, a counter pressure device in the area of the discharge end of the circular gap is provided. To reduce the space requirement in the discharge area at the discharge end of the circular gap, which makes it possible to reduce the size of the discharge casing and cut costs due to a less complicated design, the counter pressure device has a counter pressure surface, the radius of which is decreasing in the conveying direction of the solid liquid mixture. In this way the solid liquid mixture with the liquid largely extracted will be redirected radially inwards and outside of the counter pressure device no additional space is needed to discharge the solid liquid mixture with the liquid largely extracted, so that the discharge casing may be reduced in size correspondingly.

Screw press for separation of liquid from solid-liquid mixtures especially pulp suspensions

The invention relates to a screw press for separating liquids from solid-liquid mixtures, especially pulp suspensions, which has a casing provided with liquid passages, especially divided into segments, a screw rotating inside the casing, a shaft, preferably hollow, and a suspension feed area. It is primarily characterised by a filtrate shell being provided directly at one or several screen baskets &prime; and by discharge openings being provided in the lower part of the shell

A screw press for separating liquids from solid-liquid mixtures, especially pulp suspensions, which has a casing 2 provided with liquid passages, especially divided into segments 3, 3', as well as having a screw 4 rotating inside the casing, a shaft 5, preferably hollow, and a suspension feed area 6. It is primarily characterized by the suspension feed area 6 extending lengthwise in an axial direction on the screw casing 2 with the length and position of the feed opening being adjustable.

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Eggersdorf, Austria

Rudolf Stadlauer