Chemical Engineering [Coulson and Richardson's] (Solutions by J. Brackhurst, J. Harker

By J. Brackhurst, J. Harker

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Extra resources for Chemical Engineering [Coulson and Richardson's] (Solutions Manual - Vol 2, 3)

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What is implied about the settling characteristics of such a suspension from the Kynch theory? Comment on the validity of the Kynch theory for such a suspension. 31) A plot of ψ as a function of C is shown in Figure 5a. 61 The maximum flux and the point of inflexion are shown in Figure 5a. 3. 0 Concentration, C Figure 5a. 6 u0 where u0 is the free falling velocity of an individual particle. 1 mm spheres of glass of density 2600 kg/m3 settling in water of density 1000 kg/m3 and viscosity 1 mN s/m2 .

From the point u = 0 and c = 1290 kg/m3 , a line is drawn which is tangential to the curve. 0154 kg/m2 s. 002 0 200 400 600 800 1000 1200 1400 Solids concentration, c (kg/m3) Figure 5b. 1 mm and density 2600 kg/m3 . At approximately what mass rate of flow per unit area of bed will (a) fluidisation, and (b) transport of particles occur? 2. 5 mm will be fluidised by water in a tube of diameter 10 mm on the assumption that the Carman-Kozeny equation is applicable. Discuss the uncertainties in this calculation.

3. 0 Concentration, C Figure 5a. 6 u0 where u0 is the free falling velocity of an individual particle. 1 mm spheres of glass of density 2600 kg/m3 settling in water of density 1000 kg/m3 and viscosity 1 mN s/m2 . It may be assumed that the resistance force F on an isolated sphere is given by Stokes’ Law. 3. 1 m3 /s of a slurry of a solids concentration of 150 kg/m3 . 27 A value of 1290 kg/m3 for underflow concentration was selected from a retention time test. Estimate the underflow volumetric flow rate assuming total separation of all solids and that a clear overflow is obtained.

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