A screw press can be used in an extremely wide variety of liquid-solid separation, or dewatering applications. An screw press can be used in the same applications where belt presses, centrifuges, and filter presses have traditionally been used, as well as in more traditional screw press applications such as those in the pulp & paper industry.
The screw press is a very simple, slow moving mechanical devise. Dewatering is continuous and is accomplished by gravity drainage at the inlet end of the screw and then by reducing the volume as the material being dewatered is conveyed from the inlet to the discharge end of the screw press. Proper screw design is critical, as different materials require different screw speeds, screw configurations, and screens in order to dewater to a high outlet consistency while maintaining an excellent capture rate pulp press crushers.