Screw extrusion solid-liquid separator

Abstract

A screw extrusion solid-liquid separator comprises a box and a base; the box-type base is inclined, a garbage collection box is arranged below the higher end of the base, screen cylinders formed by alternately arraying movable ring blades and static ring blades are arranged in the box, two variable-pitch screw shafts which are arranged side by side and are opposite in rotating direction are arranged in each screen cylinder, a back pressure device for adjusting the size of a discharging port and back pressure is arranged at one end of each screen cylinder, a back pressure disc is connected with a back pressure adjusting and controlling mechanism, and a dual-screw driving device is arranged at the other end of each screen cylinder and comprises a motor and a gear train; a movable ring blade driving system is arranged between the two screen cylinders and is connected with a crank-rocker mechanism through a motor and a speed reducer in sequence. Solid-liquid separation and the self-cleaning function of the screen cylinders and the screw blades are achieved through the screen cylinders with the movable and static ring blades and the variable-pitch double-screw shafts; the independent driving movable and static ring blade filtration and screw extrusion modes are adopted for dehydration and separation of mixed sewage, and filtration auxiliaries including wood shavings and the like are added, so that filter liquor is high in clarity, filter residues are low in moisture content, and the separation efficiency is greatly improved.

Description

technical field [0001] The invention relates to a dehydration device for solid-liquid separation, in particular to a screw extrusion solid-liquid separator in a viscous environment. Background technique [0002] The solid-liquid separator in the prior art can be widely used in fields such as pig farms, food processing, electroplating wastewater, printing and dyeing wastewater, wastewater containing cutting oil, paint wastewater, vegetable residues, fruit peels, and food residues. With the development of the application field of dehydration technology, in various industrial fields and environmental protection processes, the particle size of solid particles in many slurries that require solid-liquid separation is very fine, and there is a tendency to become finer, and the general development trend is High clarity of filtrate and low moisture content of filter residue are required to reduce the workload of drying and further processing and reduce the cost of solid-liquid separa...

AI Technical Summary

Problems solved by technology

[0004] In order to achieve high clarity of septic tank sewage filtrate and low moisture content of filter residue, solve the problem that the sticky dirt on the spiral blades cannot be transported due to idling, and avoid the blockage of the screen hole of the solid-liquid separator and the damage of the moving ring and the spiral blade Wear, improve the solid recovery rate of the solid-liquid separator, reduce the nitrogen and phosphorus nutrients in the liquid in the feces, and provide a screw extrusion solid-liquid separator

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