posted on 2014-09-10, 00:00authored byRyszard Wójtowicz
This
work presents experimental results of the drawdown of floating
solids in agitated vessels. The effect of an agitator type, its location
in the tank, and dispersed phase properties on minimum values of agitator
speed and power requirements for floating solids suspension was investigated.
The results were processed as dimensionless correlations using the
Froude number and modified Reynolds number. A comparison was made
between classical stirred tanks (with single or dual impeller systems)
and a vibromixer agitated by a single, reciprocating disc. The tests
showed that given an appropriate selection of disc diameter and off-bottom
clearance, the power consumption for drawdown of floating solids in
a vibromixer can be halved, compared to a classical stirred tank.