Chemical Engineering August 2014 - 47

P4
Source: Oluji´c et al., Chem. Eng. Technol.
35 (2012) 1392-1404
F
P3
X
G
Figure 9. This diagram is a schematic representation
of the pressure drop situation as encountered in
partitioned sections of the four-product DWC shown in
Figure 7
A
P2
the column but also remove any liquid
running down the wall. By this
method, no liquid on the cold side
can evaporate, and heat flow across
the dividing wall is drastically reduced
when no vapor can condense
on the hotter side.
Regarding the potential for meH
P1
∆pH
+ ∆pG = ∆pA
∆pG + ∆pF = ∆pX
(1)
(2)
providing sufficient insulation in
the critical zones. In columns using
structured packings, heat transfer
across the wall can be reduced to
an acceptable level by using highquality
wall wiper systems, which
not only center the packing inside
References
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chanical damages due to thermal
stresses imposed by welding and
inevitable expansion (potentially
deformation) of the partition wall,
a non-welded wall is a much better
option and should be considered
first. However, the existence of a
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main column side, forcing a fraction
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the amount of flow resistance
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ChemiCal engineering www.Che.Com august 2014 47
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