Center-driven sludge scrapers are mostly used in large-diameter circular sedimentation tanks, especially secondary sedimentation tanks, in urban sewage treatment plants and industrial wastewater treatment to remove sludge settled at the bottom of the tank and skim scum on the tank surface. This equipment is widely used in sewage treatment projects in urban chemical, textile, metallurgical and other industries. Center-driven sludge scrapers are mostly used in large-diameter circular sedimentation tanks, especially secondary sedimentation tanks, in urban sewage treatment and industrial wastewater treatment to remove sludge settled at the bottom of the tank and remove scum on the tank surface. This equipment is widely used in sewage treatment projects in urban, chemical, textile, metallurgical and other industries.