column can be divided into three sections name
ly, enriching section,
stripping section and feeding tray. Feeding tray is the tray
/stage of distillation column
where the feed is introduced. Enriching section consists of
the trays above the feed tray
and is so named because in this section, rising vapors are enr
iched in more volatile
component. Since liquid is stripped off of the more volatile c
omponent in the section below
feeding tray, it is called stripping section
e analysis for the distillation column, each of these se
ctions is considered
separately along with the distillation column as a whole. Ov
erall mass balance and
component balance for the volatile component is performed f
or each section with the
assumptions made above. These equations are used to derive r
elationship between vapor
and liquid in each section and then correlated to the feed usi
ng energy balance. Quality of
the feed is determined by a ’q-line’. This results in a set of e
quations describing the
operating lines for enriching and stripping sections. Inte
rsection of these three lines on the
VLE diagram indicated the location of the feeding tray in the
distillation columns