Application scenarios：
The peripheral drive sludge scraping and sucking machine is suitable for radial flow sedimentation tanks of large, medium, and small diameters with central water inlet, peripheral water outlet, and central sludge discharge. It is mainly used for sucking and discharging sludge in the secondary sedimentation tanks of urban wastewater treatment plants.
Structure&Principle：
The equipment adopts **peripheral drive**. Wastewater flows in through the central inlet pipe, diffuses through the stilling cylinder, and flows evenly outward in a radial pattern. Suspended sludge settles at the bottom of the tank after sedimentation. The drive unit rotates the working bridge along the periphery, which in turn drives the scraper arms and scraper blades to rotate. After the sludge is scraped and collected by the blades, it is sucked into the sludge collection tank by the sludge suction pipes using the hydrostatic pressure inside the tank, then discharged into the central sludge cylinder and further expelled outside the tank through the central sludge discharge pipe. Surface scum is guided into the scum hopper by the rotating skimming device for removal. Meanwhile, the supernatant liquid overflows through the triangular outlet weir plate into the outlet trough for discharge.
Main Features：
1. The working bridge can be either semi bridge or full bridge type, and its material can be carbon steel, stainless steel, or aluminum alloy.
2. The drive unit adopts a shaft mounted helical gear reducer directly connected to the driving roller, featuring a compact structure and high mechanical efficiency.
3. The sludge suction pipe adopts a bell mouth design for excellent sludge suction performance.
4. There are two sludge suction methods: self priming and siphon (the former is usually adopted).
5. Dual mechanical and electrical overload protection is provided for safe and reliable operation.
6. The equipment is easy to operate, equipped with a local/remote control selector switch for direct control.
Model Description：
