几点说明 Supplements to Fenske eq.：
d d lg / b L b H Nm lg L, H
feed-stage location：by replacing feed as the column top (or bottom) 把进料当作塔顶（或塔釜）
6. Fenske方程可以用来计算进料板位置、各段理
dr Nm 论板数和组分分配。 di ir bi be br for calculating Fenske equation can used feed-stage location, number of equilibrium stages fi d b i i of rectifying section and stripping section, and component distributions.
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