Screw extruder for extrusion dehydration

Abstract

The invention relates to a screw extruder for extrusion dehydration. The screw extruder comprises a shell, a shaft-less spiral component and a valve plate, wherein shaft-less spiral blades of the shaft-less spiral component are positioned in the shell; forward conveying of materials is finished through the rotation of the shaft-less spiral blades; the front half part of the interior of the shell is a cylinder body for bearing the materials; the rear half part of the interior of the shell is a screen cylinder with meshes; the valve plate is hinged to the tail end of the shell; the materials are continuously extruded in the screen cylinder, so that the aim of solid and liquid separation is gradually fulfilled; separated waste water is drained through the meshes in the screen cylinder, and the finished materials are accumulated in the screen cylinder in the shell; when the action force of the finished materials is strong enough to overcome the self weight of the valve plate on the tail part of the shell, the valve plate is rotated to be opened. The gap that the current equipment cannot dehydrate municipal garbage is filled, and the screw extruder for extrusion dehydration is high in dehydration efficiency, good in adaptability to the materials and convenient to mount and maintain. The screw extruder for extrusion dehydration is particularly applied to extrusion dehydration operation on solid wastes, such as the municipal garbage, which are primarily crushed.

Description

technical field [0001] The invention relates to environmental protection machinery and equipment, more specifically, to a screw extruder for extrusion dehydration. Background technique [0002] At present, the common dehydration equipment using extrusion principle mainly includes plate and frame filter press, stacked screw dehydrator and so on. There are three types of plate and frame filter press: manual compression, mechanical compression and hydraulic compression. When working, the mixed liquid flows through the filter medium (filter cloth), and the solid stays on the filter cloth, and gradually accumulates to form a filter mud cake. , while the filtrate permeates the filter cloth and becomes clear liquid without solids. The main body of the stacked screw dehydrator is a filter device formed by stacking a fixed ring and a moving ring, and the screw shaft runs through it. The front section is the concentration section, and the back section is the dehydration section. The...

AI Technical Summary

Problems solved by technology

The above two extrusion dewatering machines are mainly used in industrial sewage treatment or sludge dehydration, and are not suitable for dehydration of municipal waste.

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