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Particle Design Optimization Case Study

Problem

Determine the sensitivity of process air flow rate to particle size, shape, and density if U/Ut in the spout and U/Umf at the top of the annulus must be maintained at 1.07 and 0.81, respectively as the initial processing condition.

Problem Categories

Hydrodynamic, formulation, engineering, and PCTSWurster .
Solution

Using PCTSWurster, duplicate U/Ut in the spout and U/Umf in the annulus at various particle properties.
Results

Particle Size (mm)

Particle Shape Factor

Particle Density (g/ml)

Air Flow Rate (SCFM)

1000 (0%)

100% (0%)

1.5 (0%)

1980 (0%)

800 (-20%)

100%

1.5

1840 (-7%)

1200 (+20%)

100%

1.5

2100 (+6%)

1000

90% (-10%)

1.5

1810 (-9%)

1000

80% (-20%)

1.5

1740 (-12%)

          1000         

100%

1.3 (-13%)

1890 (-5%)

          1000         

100%

1.7 (+13%)

2060 (+4%)