Abstract:

In order to compress sediments in the gravity field further, a new thickener with eccentric revolution stirring is developed based on deep cone thickeners. Both effects of stirring and pressuring lead sediments to deep compact in the compression zone. The experimental results show that the shearing function provided by the eccentric revolution stirring can be only input after the sediment concentration reaches the compression point. There is a sediment specific optimal range of shearing forces. Within this range this new kind of the thickener has higher efficiency, better thickening effect, low energy consumption, and gets homogeneous sediments compared with the deep cone thickener.

Key words: Thickener, Eccentric revolution, Shearing force, Stirring, Compression zone