Spiral extruding filter

Abstract

The invention relates to a spiral extruding filter, which mainly comprises a motor and a filter cartridge. A spiral shaft runs through the inside of the filter cartridge and connected with an output shaft of the motor; the filter cartridge is provided with a discharge opening and a feeding opening; the spiral shaft is provided with at least one intermittent spiral shaft vane; the filter cartridge at the intermittent part of the spiral shaft vane is fixedly connected with a cylinder; and the cylinder is provided with a baffle plate which is arranged between the intermittent spiral shaft vanes. The spiral extruding filter has the advantages of making materials in the filter cartridge bear higher pressure, improving the filtering speed and improving the production efficiency. Compared with the common spiral shaft, the spiral vane has one or more intermittent parts; the spiral shaft has no push force on solid phase materials at the intermittent parts, so the solid phase material can be accumulated in the filter cartridge, and the materials can continuously move forward by only using subsequent materials to apply larger push force on the materials. The larger push force can accelerate the dehydration of materials.

Description

technical field [0001] The invention relates to solid-liquid separation technology, in particular to a filter device for separating liquid containing solid phase particles into filtrate and dehydrated filter cake, mainly a screw extrusion filter. Background technique [0002] Filters are widely used in the fields of sewage, sludge treatment and food processing in the environmental protection industry. Existing filter devices include centrifuges, plate and frame filters, belt filters, and the like. Among them, the centrifuge has high speed, high noise, and high energy consumption; the plate-and-frame filter occupies a large area, and the filter cloth is easy to break, so it cannot be continuously produced; the filter cloth of the belt filter needs to be replaced frequently, and the amount of cleaning water is large. The dynamic and static ring type spiral extrusion filter is a kind of spiral extrusion filter with high filtering performance, but the existing dynamic and stati...

AI Technical Summary

Problems solved by technology

In the dynamic and static ring net type spiral extrusion filter disclosed in Chinese patent CN101058047, the moving ring has a flange, and the grooves on the spiral blades drive the moving ring to rotate. The friction between the moving ring and the material consumes a large power, and the grooves on the blades The bar will also move the material to rotate with the screw shaft, which will affect the production efficiency of the machine

In the machine structure disclosed in the above-mentioned existing patents, since the blades of the screw shaft are continuous, the solid phase matter in the filter cartridge will move from the inlet end of the material to the outlet end without interruption under the push of the screw blades, and the material is moving forward. During the process, without any hindrance, the pressure exerted by the spiral blades in the filter cartridge on the material is relatively small, the filtering driving force of the material is very small, and the filtering speed of the material is very low, which affects the production capacity.

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