COMPLEX MODEL OF THE EFFICIENCY OF RECTIFICATION PLATES.
6. SOME FEATURES OF APPLICABILITY OF CALCULATIONAL DEPENDENCES
V. N. Pavlechko

UDC 66.048.375

The author assumes the interrelation of the distances 
from the site of injection of a vapor h and a liquid h1 
to the surface of equality of the concentrations on ideal and 
real plates with a degree of deviation from the Raoult law that is 
characterized by the activity coefficient . If the 
activities of the components of ideal and real solutions coincide 
( = 1), then h = 0.5 and h1 = 0.5. 
With a positive deviation of a highly volatile component from the Raoult 
law ( > 1), h > 0.5 and h1 > 0.5 with a negative deviation 
( < 1) -  h < 0.5> and h1 < 0.5. 
The influence of the activity of a poorly volatile component and of both 
components on the indicated distances is also analyzed. In order to eliminate 
the negative values of the efficiency in calculational procedures, especially 
in countercurrent flow, it is proposed that the coefficient of equilibrium be 
found from the slope of a tangent to an equilibrium line to the X axis and 
that the length of a segment cut off by this tangent on the Y axis 
be taken into account. Some modifications of new dependences for concurrent 
flow, countercurrent flow, and cross flow with mixing and without 
it are given.

Belarusian State Technological University, Minsk, Belarus. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 74, No. 3, pp. 
181-183. Original article submitted January 26, 2000; 
revision submitted September 14, 2000.

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