板式塔设计范例(16)

15 lg μLm =Σxi lg μi

塔顶液相平均粘度的计算：

由t D ＝82.7℃，查手册得

μA =0.300 mPa ·s μB =0.304 mPa ·s lg μLDm =0.957×lg(0.300)+ (1-0.95)×lg(0.304) 解出μLDm =0.300 mPa ·s

进料板液相平均粘度的计算

由t F ＝94.2℃，查手册得

μA =0.269 mPa ·s μB =0.277 mPa ·s lg μLFm =0.409×lg(0.269)+ (1-0.409)×lg(0.277) 解出μLFm =0.274 mPa ·s

塔底液相平均粘度的计算

由t w ＝105.1℃，查手册得

μA =0.244 mPa ·s μB =0.213 mPa ·s lg μLwm =0.07×lg(0.244)+ (1-0.07)×lg(0.213) 解出μLwm=0.215 mPa ·s

精馏段液相平均粘度为

μLm =(0.300+0.27)/2=0.287 mPa ·s

提馏段液相平均粘度为

μLm =(0.300+0.215)/2=0.258 mPa ·s

7. 气液负荷计算

精馏段：

()1(2.921)42.99168.52/V R D Kmol h =+=+⨯= 3

168.5280.97 1.606/36003600 2.36

Vm

S vm V M V m s ρ⨯⨯===⨯