At the top assuming hg and hl are constant mv h l 023

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Unformatted text preview: HOG , m 0.77 0.35 0.86 0.36 0.99 0.38 1.09 0.40 1.17 0.41 1.30 0.43 2.31 m = mV/L 0.64 0.70 0.82 1.00 1.21 1.36 1.57 1.67 m HOG , m 0.22 0.23 0.24 0.27 0.29 0.31 0.34 HETP, m 0.39 0.39 0.38 0.38 0.38 0.38 Stripping Section: Stage m 7 0.90 8 0.98 9 1.15 10 1.40 11 1.70 12 1.90 0.2 of 2.20 13 Total height = HETP, m 0.27 0.27 0.27 0.27 0.27 0.27 0.2*0.27 = 0.05 Note that although HOG varies significantly with stage in both sections, HETP does not. The total packed height = 2.31 + 1.67 = 3.98 m or 13.1 ft. (e) Compute pressure drops for the packed sections from the correlation of Billet and Schultes. The pressure drop per unit height of packed bed is given by Eq. (6-115), 1/ 2 Po - hL P 13300 = exp ( N FrL ) lT lT a 3/ 2 This equation will be used in each section. 1.5 (1) Po a u 2 1 = o 3 o G lT 2 gc KW The required packing parameters are as follows from Table 6.8 and above: FP = 16 ft2/ft3, a = 92.3 m2/m3, = 0.977 m3/m3, Ch = 0.876, and Cp = 0.421 From Eq. (6-110), (2) Analysis: (e) (continued) 1- 1 - 0.977 From...
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