MVDm=0.9971×108.643+(1-0.9971)×149.479=108.761 MLDm=0.9963×108.643﹢(1-0.9963)×149.472=108.794 进料板：yF=0.9830 xF=0.9784
MVFm=0.9830×108.643﹢(1-0.9830)×149.472=109.337kg/kmol MlFm=0.9784×108.643﹢(1-0.9784)×149.472=109.525kg/kmol 塔釜：y17/=0.83976 x17/=0.8028
MVWm=0.83976×108.643﹢(1-0.83976)×149.472=115.185kg/kmol MVWm=0.8028×108.643﹢(1-0.8028)×149.472=116.694kg/kmol 则精馏段平均摩尔质量：
108.761?109.337?108.849kg/kmol
279.29?86.69MLm精=?82.99kg/kmol
2MVm精=
则提馏段平均摩尔质量：
109.337?115.185=112.28kg/kmol
2755.698?807.749MLm提==782.723kg/kmol
2MVm提=
(四）平均密度ρ1.液相密度ρLm 塔顶ρ
LmD
m
=791.351㎏/?
LmF
进料板ρ塔釜ρ
LmW
=755.698㎏/?
=807.749㎏/?
Lm精
791.351?755.698?773.5245㎏/?
2755.698?807.749提馏段中平均液相密度ρLm提==782.723㎏/?
2故精馏段中平均液相密度ρ=
