The mechanical characteristics The machine is suitable for various sewage treatment, application scope. With unique more paragraphs dehydration design, dehydrated, high efficiency, less water filter cake. This function is continuous operation and low speed, high efficiency. This machine is equipped with automatic anti-eccentrically take device and increase pressure relief devices, convenient operation, high reliability, good safety. Prinple 1, pretreatment stage-the original pulp using gravity settlement enrichment methods and form a high concentration, the volume is less sludge. And then after the sludge and concentrated of macromolecular flocculating mixed, and the material in the flocculant under the action of tiny particles converge into effect and the preliminary round state precipitate in sludge shape, ready to conditions for dehydration. 2, gravity dehydration-flocculation pretreatment of sludge to filter take, in the sludge under the action of gravity, that was outside the group of free water, from filters filter out, decrease the sludge water. 3, wedge preloading dehydration-gravity dehydration of the wedge section after the sludge preloading dehydration, liquidity almost completely lost, so as to ensure the sludge in normal condition, won't squeeze out of the section in the dehydration. 4, roller dehydration sludge in more-the reasonable layout of the root of the roller repeated extrusion and shear function, take off a lot of capillary function of water, sludge gradually reduce water, then with pure pressure roller extruding, formation of moisture content rarely massive mud cake, tipping in shovel sword. Use Can be widely used in urban sewage, printing and dyeing, textile, papermaking, foodstuff, pharmacy, chemical industry, metallurgy, petroleum and other areas of sludge dewatering (or material).