Sludge crushing system and sludge crushing method

Abstract

The invention discloses a sludge crushing system and a sludge crushing method. The crushing system comprises a feeding system, a sludge crusher and a material collection conveying system, wherein the sludge crusher comprises a box body, a sludge pressing mechanism, a fixed knife group and a movable knife; the fixed knife group is arranged on one side or two opposite sides of the box body; meshes are formed in the fixed knife group; the sludge pressing mechanism is arranged in the box body and does a reciprocating motion in a direction parallel to the fixed knife group under power drive; the movable knife is arranged outside the box body and is positioned outside the fixed knife group; sludge is fed into the box body to be crushed by the feeding system; the sludge pressing mechanism pushes the sludge to press the fixed knife group; the sludge is extruded out of the box body through the meshes in the fixed knife under the pressure; the movable knife rotates outside the box body, and the segmented and extruded sludge is cut off to form particles, and the sludge is crushed. The system is simple and feasible and is suitable for sludge with different moisture contents, and particles with different sizes can be easily obtained by changing the sizes of the meshes in the fixed knife.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge crushing system and method. Background technique [0002] After the sludge is concentrated and filtered by the sewage treatment plant, the water content is generally about 80%. This sludge is colloidal and continuous, and it is very difficult to dry. The water content of some sludge is reduced to 60% to 65% after deep pressure filtration, presenting the shape of sandwich candies that are hard on the outside and soft on the inside, and it is difficult to further dry. Therefore, in order to realize the drying of sludge, the first thing to do is to crush the sludge. [0003] Due to the colloidal characteristics of sludge, as well as the characteristics of humidity and corrosion, commonly used crushing methods and equipment are often ineffective when used for sludge crushing. Therefore, some research institutions and enterprises have also carried out a lot of rese...

AI Technical Summary

Problems solved by technology

[0004] These patented technologies mostly use rollers, spirals, teeth, etc. to crush the sludge. The sludge is easy to adhere to the surface of the equipment and often needs to be cleaned. Moreover, it is difficult to obtain a uniform and small size with a large surface area. Particles, especially for sludge with high water content, are more difficult to break

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