screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions

摘要

The press has a sheath (4) covering a shaft (1) which contains liquid. An annular gap (5) is formed, by which a solid liquid mixture is pressed and a counter-pressure mechanism (7) is near the outlet area (6) of the annular gap. The counter-pressure mechanism has a counter-pressure surface (8) with a radius reduced in direction of the solid liquid mixture. The counter-pressure mechanism is adjustably connected in the direction of the shaft with pneumatic cylinders. The counter-pressure surface is conically tapered.