The use of a continuous atmospheric gravity separator which is also known as decanter is widely applied in separating immis cible liquids that are having distinct densitie s. 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 e ventually cause the mixture to separate its elf 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 resis tance to the flow of the liquid is essentially negligible, analyze the effect of the density of both liquids to the vertical height of the liquid B (hgi & hg2). Subsequently show that the vertical height of the liquid interface (haI) depends on the vertical diffe rence of both overflow lines. Elaborate the purpose of having the overflow line of liquid B to be ele vated at certain height, ha2. Vent (open to atmosphere) Feed in overflow lines ha Liquid A ha2 h81 Liquid B Collection tank for liquid A Collection tank for liquid B Figure 1 Decanter unit for two immiscible liquids A & B.
The use of a continuous atmospheric gravity separator which is also known as decanter is widely applied in separating immis cible liquids that are having distinct densitie s. 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 e ventually cause the mixture to separate its elf 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 resis tance to the flow of the liquid is essentially negligible, analyze the effect of the density of both liquids to the vertical height of the liquid B (hgi & hg2). Subsequently show that the vertical height of the liquid interface (haI) depends on the vertical diffe rence of both overflow lines. Elaborate the purpose of having the overflow line of liquid B to be ele vated at certain height, ha2. Vent (open to atmosphere) Feed in overflow lines ha Liquid A ha2 h81 Liquid B Collection tank for liquid A Collection tank for liquid B Figure 1 Decanter unit for two immiscible liquids A & B.
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter3: Refrigeration And Refrigerants
Section: Chapter Questions
Problem 31RQ: Define a near-azeotropic refrigerant blend, and give twoexamples.
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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 densitie s. 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 e ventually cause the mixture to separate itself into two distinct
la yers. 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 resis tance
to the flow of the liquid is essentially negligible, analyze the effect of the density of both liquids to
the vertical height of the liquid B (hgi & hg2).
Subsequently show that the vertical he ight of the liquid interface (hai) depends on the vertical
difference of both overflow lines.
Elaborate the purpose of having the overflow line of liquid B to be elevated at certain height, hr2.
Vent (open to atmosphere)
Feed in
overflow lines
ha
Liquid A
h82
he1
Liquid B
Collection tank
Collection tank
for liquid B
for liquid A
Figure 1 Decanter unit for two immiscible liquids A & B.
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