Besides dimension of the vessel, impeller and baffles certain physical data are needed for complete description of slurry mixing problem
1. Specific gravities of solid and liquid
2. Solid content of the slurry (wt %)
3. Settling velocity of the particles (ft/min)
Design duty
1. Design conditions: Slurry properties
Volume=1000gal h/d=1
viscosity =1.7pa.s Mean particle size of solid=410 mm=0.0013ft
S1: Density of solid =1370.65kg/m3
S2: Density of liquid (0.5M Nacl)=1054Kg/m3.[6]
2. Fraction of the solids=15%
3. Settling velocity
Stokes law
Us = 9.97*106 (S1-S2) D2/viscosity
= 9.97*106*(1.370-1.054)(0.0013) 2/1.7
= 3.13ft/min
Consider the following mixer arrangement.
