Decanter centrifuges are available in several variations to fit different applications.
Unlike screening centrifuges, decanter centrifuges allow the solids to form sediments in the liquid, but are not retained by a screen. The speed of sedimentation can be increased by adding flocculants.
In the solid bowl centrifuge, the sedimented solids are transported by the scroll to the smaller diameter and discharged, while the clear liquid flows over the adjustable weir at the cylindrical end of the machine.
Screen decanters are a combination of a decanter and screen centrifuge, which has a screen section to further reduce the final moisture. Material passing through the screen section can be recycled to the centrifuge feed.
Variations of decanter centrifuges include:
- Standard decanters
- Twin cone decanters
- Solid bowl centrifuges
- Turbo screen
- Conthick - Decanter and Conturbex in one
- Short bowl