Mixing and agitation

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Mixing and agitation

  1. 1. Mixing and Agitation ( 1. 2. : dispersion 3. : fluidization pneumatic coveying drying 4. : spraying atomization 5. : dissolution ( , emulsification dispersion 6. 7. : mixing of powders suspension 2 , 5 6
  2. 2. (mass transfer) (extraction tower) 17 (Circulation) (external pump) (suction) (lateral flows) draft tube 1. (solid suspended) (gas dispersed)
  3. 3. The vessel ( (dished bottom) (flat bottom) Baffles Reynolds numbers (vortexing) (rotation) 1/12 w=Dt/12 d/2 1/6 ¼ ½
  4. 4. Draft tubes …. Impeller types Impeller size Reynolds Froude Power number d/Dt=0.3- 0.6 Impeller speed 37, 45, 56, 68, 84, 100, 125, 155, 190 320 rpm torque Impeller location ( 1/6 1/3 Dickey (1984) h/Dt 2
  5. 5. 2.
  6. 6. 1/7/13

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