The mud scraper is composed of a driving device, a working bridge, a main mud scraping device, an auxiliary mud scraping device, a central turntable, a skimming device, an overflow weir plate and a slag retaining plate, and a power collecting device. For the sedimentation tank with central water inlet and peripheral water outlet, it is generally necessary to set up a guide tube. In order to achieve the best sedimentation and sludge discharge effect, our company is equipped with complete sedimentation tank structure diagrams of various models for reference.