Solids concentration distribution in slurry reactors stirred with multiple axial impellers

Scale-up criteria for the solids distribution in slurry reactors stirred with multiple impellers

“…A simple relationship can be established between Pe S and (Magelli et al, 1990(Magelli et al, , 1991. A straightforward implementation of Eq.…”

“…(4) whose parameters A; ; ÿ are to be found on experimental basis for each mixer conÿguration (Magelli et al, 1991). In a more general way, the value of Pe S to be used in Eq.…”

“…In a study on the behaviour of vessels 0.13 and 0:23 m in diameter stirred with multiple radial Rushton turbines, Magelli et al (1990) arrived at the criterion n=0:93. Similar values for the exponent n were conÿrmed for multiple axial impellersalthough derived from correlations based on a single vessel size (Magelli et al, 1991). An analysis of solids distribution in vessels of diameter ranging from 0.61 to 2:67 m stirred with a single pitched-blade turbine (PBT) resulted in the criterion n = 0:67 (Mak and Ruszkowski, 1990;Mak et al, 1997).…”

Solid particle distribution of moderately concentrated suspensions in a pilot plant stirred vessel

“…No measurements could be taken in the area under the impeller and at certain points at the elevation of 90 cm from the vessel bottom, because the upper end of the carrying tube of the probe reached too close to the motor (Nos. 3,7,11,15). The accuracy of manual probe adjustment was ±0.2 cm in the axial and radial directions, and ±1 • in the tangential direction.…”

“…Optical methods are very popular and much useful work has been done here; the Refs. [2][3][4] are an example. These non-intrusive methods are generally limited to solids concentrations less than 1-2%.…”