Sludge comprehensive utilization pretreatment system

The invention relates to a sludge comprehensive utilization pretreatment system. The system comprises a base, support frames, a support cylinder, a crushing mechanism, an extrusion mechanism, an opening and closing mechanism and a stirring mechanism, supporting frames are symmetrically installed on the upper end face of the base. The supporting cylinder is installed between the supporting frames and is of a cylindrical structure with openings in the upper end and the lower end, the crushing mechanism is installed on the lower side in the supporting cylinder, rhombic grooves are evenly formed in the supporting cylinder, the extrusion mechanisms are arranged in the rhombic grooves, an opening and closing mechanism is installed on the upper end face of the supporting cylinder, and the stirring mechanism is installed at the upper end of the opening and closing mechanism. Existing processes of manually holding hard rods to beat sludge generally exist in the prior art. The problems that themanual beating speed is l