14100 114 at the top propylene viscosity 045 cp at

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Unformatted text preview: ttom, = 1.14(0.44) = 0.50. From Fig. 7.32, Eo = 62%. Actual trays and column heights: Actual tray requirements are 90/0.62 = 145 trays for the bottom column and 90/0.60 = 150 trays for top column. Column heights are: Bottom column = 144(2) + 4 + 10 = 302 ft Top column = 149(2) + 4 + 10 = 312 ft Exercise 7.45 Subject: Sizing of a vertical flash drum. Given: Flash temperature and pressure, with product flow rates in Fig. 7.48. Find: Drum height and diameter. Analysis: To determine minimum drum diameter, use Eq. (6-44) with f = 0.85 and Ad = 0. The flooding velocity is obtained from Eqs. (6-40) and (6-42), using FST = 1.0, FHA = 1.0 and FF = 1.0, with CF from the 24-inch plate spacing curve in Fig. 6.24. The value of FLV is obtained first, using the conditions in Fig. 7.48. MV = [187.6(58.1) + 176.4(72.2) + 82.5(86.2)]/446.5 = 68.9 ML = [112.4(58.1) + 223.6(72.2) + 217.5(86.2)]/553.5 = 74.8 From a simulation program, V = 1.13 lb/ft3, compared to 0.965 from the ideal gas law and L = 33.2 lb/ft3....
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This note was uploaded on 09/08/2008 for the course CHE 244 taught by Professor Selebi during the Spring '06 term at Lehigh University .

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