Scraper, a mud equipment. For urban sewage treatment plants, water plants and industrial wastewater treatment larger diameter circular sedimentation tank, remove sludge and scum Excluding the settlement in the bottom of the pool deck. Components: scraper by driving means, working bridge, the main scraper, auxiliary scraping device, the center wheel, skimming devices, weir plate and slag board, collecting devices and other components. Periphery to the center of the water sedimentation tank effluent, generally need to set the draft tube. Used to achieve the best effect of precipitation sludge, the company with a complete structure of the sedimentation tank models for reference. Category: scraper mainly peripheral drive scraper, scraper enrichment center drive. Center Drive Mud Scraper concentrated mainly by the overflow device, beams and railing, inlet tube, gear, electrical boxes, steady flow tube, spindle, scum rake boards, shaving collection equipment, underwater bearings, small blade, powder hopper scum rake boards and other components. Center Drive concentrated scraper function is further separated sludge thickener free water, in order to reduce the volume of sludge, sludge concentration increase, after exclusion of the concentrated sludge pond outside.