The use of a continuous atmospheric gravity separator which is aso known as decanter is wide ly applied in separating immiscible liquids that are having distinct densities. Figure 1 shows a decenter that separates two immiscible liquids (Liquid A and B) in which liquid B having higher density than liquid A. The feed mixture enters the unit at one end of the separating vessel and flows slowly to the other end which eventually cause the mixture to separate itself into two distinct layers. Liquid A and B flow out at the overflow lines to the respective collection tank which are open to atmosphere. For a properly designed decanter and assuming that the frictional res istance to the flow of the liquid is essentia lly neglig ible, analyze the effect of the density of both liquids to the vertical height of the liquid B (hai & ha2).

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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The use of a continuous atmospheric gravity separator which is also known as decanter is widely
applied in separating immiscible liquids that are having distinct densities. Figure 1 shows a
decenter that separates two immiscible liquids (Liquid A and B) in which liquid B having higher
density than liquid A. The feed mixture enters the unit at one end of the separating vessel and
flows slowly to the other end which eventually cause the mixture to separate itself into two distinct
layers. Liquid A and B flow out at the overflow lines to the respective collection tank which are
open to atmosphere. For a properly designed decanter and assuming that the frictional resistance
to the flow of the liquid is essentially neglig ible, analyze the effect of the density of both liquids to
the vertical height of the liquid B (hai & hB2).
Transcribed Image Text:The use of a continuous atmospheric gravity separator which is also known as decanter is widely applied in separating immiscible liquids that are having distinct densities. Figure 1 shows a decenter that separates two immiscible liquids (Liquid A and B) in which liquid B having higher density than liquid A. The feed mixture enters the unit at one end of the separating vessel and flows slowly to the other end which eventually cause the mixture to separate itself into two distinct layers. Liquid A and B flow out at the overflow lines to the respective collection tank which are open to atmosphere. For a properly designed decanter and assuming that the frictional resistance to the flow of the liquid is essentially neglig ible, analyze the effect of the density of both liquids to the vertical height of the liquid B (hai & hB2).
Vent (open to atmosphere)
Feed in
overflow lines
ha
Liquid A
hr
he2
h81
Liquid B
Collection tank
for liquid A
Collection tank
for liquid B
Figure 1 Decanter unit for two immiscible liquids A & B.
You are required to perform the analysis as described in section a) and b) subsequently suggest the design
parameters stated above. Finally justify the purpose of having the elevated outlet. Please provide the
necessary sketch/diagram to show any point of reference in your work.
Transcribed Image Text:Vent (open to atmosphere) Feed in overflow lines ha Liquid A hr he2 h81 Liquid B Collection tank for liquid A Collection tank for liquid B Figure 1 Decanter unit for two immiscible liquids A & B. You are required to perform the analysis as described in section a) and b) subsequently suggest the design parameters stated above. Finally justify the purpose of having the elevated outlet. Please provide the necessary sketch/diagram to show any point of reference in your work.
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