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7/28/2019 Crystallizer Design
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7/28/2019 Crystallizer Design
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7/28/2019 Crystallizer Design
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Operating Mode
A rough guide presented by Mersmann (2001),
(ln)
(ln)=
> 8,
(ln)(ln) =
< 1,
8 > (ln)(ln) = > 1,
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Operating Mode
For Citric Acid,
= 3.69 3.94 Hence, Vacuum or Adiabatic Cooling Crystallization
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Crystallizer Type
From Samant and OYoung (2006),
Capital Costs: DTB/DT > OSLO > FC > SCB/SB
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Equipment Sizing: Calculation Flow
DiagramRetention time
= 3.67Minimum Active Volume
=
Sizing
= +
= 0.1868 + 4 (1.5)
Height of Cone
= tan55(2 0.12 )
Height of Cylinder
= 1.5
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Mechanical Engineering Design
The selected material for the crystallizer is stainless steel
316 due to its high corrosion resistance (Westhoff et al.,
2004).
Shell Thickness
=
Torispherical Head Thickness
= 4
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Mechanical Engineering Design
ConeThickness
=
Corrosion Allowance: 2 mm
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Mechanical Engineering Design
Leg Support, Angle Type
= [ + 6 + ( + 6)
= [ 6 + ( 6
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Mechanical Engineering Design
Figure A.5.4.5.Angle Leg Dimensions
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Pipe and Nozzle Sizing
To calculate the diamters of the pipe the followinf equation
is used (Timmerhaus, 1991),
, = 3.9.
.
Manways
From Megyesy (2005), for vessels with diameters greaterthan 36 inches (the shell diameter of the crystallizer is
43.92 inch), a 15 in inner diameter manhole is installed.
The location of the manhole is preferably in the head.
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Direct Contact Condenser
F16
W, T1 Non-condensable gases
W + F16, T2
+
.= +
.
= .
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Direct Contact Condenser
Vapor Inlet
Non-condensable gasesCooling Water Inlet
Water Capacity = 40 gpm
A = 53 in
B=7 inC= 6 in
D= 11 in
E= 42 in
F = 48.5 in
G=4.5 in
Water inlet = 2 in
Vapor inlet = 10 in
Gas Outlet = 2 in
Discharge Outlet = 3 in
Discharge Outlet
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Centrifugal Pump Single Suction
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Centrifugal Pump Single Suction
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Centrifugal Pump Single Suction
Suction outlet = 5 in
Discharge outlet = 3 in
CP = 30.5625 in
DC=6.25 in
DD=5.375 in
R=3.75 in
NPOT Drain = 0.25 in
W = 5.3125 in
X = 7 in
Y = 3 in
Z = 5.625 in
L = 11.8125 inA = 8.5 inAB = 5.875 inB = 6.5 inD = 4.5 inE = 3.75 inF=2.75 inG = 0.1875 inH = 0.375 inP = 7.875 in
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Two stage reciprocating
dry vacuum pump