3.1-12. Minimum Fluidization and Expansion of Fluid Bed. Particles having a size of 0.10 mm, a shape factor of 0.86, and a density of 1200 kg/m³ are to be fluidized using air at 25°C and 202.65 kPa...

Extracted text: 3.1-12. Minimum Fluidization and Expansion of Fluid Bed. Particles having a size of 0.10 mm, a shape factor of 0.86, and a density of 1200 kg/m³ are to be fluidized using air at 25°C and 202.65 kPa abs pressure. The void fraction at minimum fluidizing conditions is 0.43. The bed diameter is 0.60 m and the bed contains 350 kg of solids. (a) Calculate the minimum height of the fluidized bed. (b) Calculate the pressure drop at minimum fluidizing conditions. (c) Calculate the minimum velocity for fluidization. (d) Using 4.0 times the minimum velocity, estimate the porosity of the bed. Chap. 3 Problems 205 Ans. (a) Lms (c) vmr = 0.004374 m/s, (d) ɛ = 0.604 = 1.810 m, (b) Ap = 0.1212 × 10' Pa,