Circular scrapers can be studied through various classifications. They can be classified as central driven, fixed bridge scrapers and peripheral driven, rotating bridge scrapers with regard to their drive. The length of a rotating bridge scraper can be equal to the basin diameter or a fraction of the basin diameter. The solid load of the treatment plant determines the method of sludge disposal. The sludge that accumulates at the bottom can either be scraped into the sludge funnel or be pumped to the pipeline of the central structure by suction pipes. Numerous options can be proposed for both methods. The selection of scraper bridge type is another major issue and the options we provide include panel, cage, profile or pipe construction.
Circular scrapers are generally composed of the following parts:
- Drive group
- Surface scraper
- Bottom scraper
- Central bed
- Sluice (channel lock) and diver curtain
- Electric control panel
The peripheral driven rotating bridge scrapers (DKS) are composed of the following parts:
- Brush collector
On the other hand, only a special lower bed is added to the main components of the central driven fixed bridge scrapers (SKS).