advanced distillation technology - a basic for process simulation
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Advanced Distillation Technology: A Basic for Process Simulation
Process Systems Design and Control Laboratory (PSDC Lab.)
School of Chemical Engineering, Yeungnam University
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Choi Bonggu & Riezqa Andika
Advanced Distillation Technology (Single Column)
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Heat Integration Assisted Distillation Technology Heat Pump Assisted Distillation Technology
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Choi Bonggu & Riezqa Andika 3
Single columns side stream arrangements can be attractive for several processes
middle product is in excess and the other product is minor
B>50% of feed; C>AB
B>50% of feed; A>BC
Single Column Side Stream Arrangements
B(Vapor Side stream)
C
A
B(Liquid Side stream)
C
A
ABC
ABC
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Choi Bonggu & Riezqa Andika 4
Latest Advanced Distillation Technology
Technology
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Choi Bonggu & Riezqa Andika
MVR is a state of the art industrial system for binary distillation and being widely applied in separation of close boiling point components. In MVR, top vapor is used as heat transfer medium. Top stream directly go to the compressor and after that go to heat exchanger to heat up the boil up stream.
Source: A. A. Kiss, S. J. F. Landaeta, C. A. I. Ferreira Towards energy efficient distillation technologies Making the right choice A. A. Kiss Advanced Distillation Technologies: Design, Control and Applications
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Mechanical Vapor Recompression (MVR)
Mechanical driven heat pump Heat driven heat transformer Heat driven heat pump
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Choi Bonggu & Riezqa Andika
In an HIDiC, heat transfer occurs in the rectifying and stripping sections. The operation of both sections is similar to adiabatic column which allows heat to enter or leave any particular stage along the column section.
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Heat-Integrated Distillation Column (HIDiC)
Source: B. Suphanit Optimal heat distribution in the internally heat-integrated distillation column
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Choi Bonggu & Riezqa Andika
Source: B. Suphanit Optimal heat distribution in the internally heat-integrated distillation column A. A. Kiss, S. J. F. Landaeta, C. A. I. Ferreira Towards energy efficient distillation technologies Making the right choice
Heat transfer from rectification section to stripping by elevating rectifying section temperature through compression of vapor from stripping section.
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HIDiC Principle
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Choi Bonggu & Riezqa Andika
Thermally Coupled Distillation (TCD)
Source: N. V. D. Long, M. Lee - Improvement of natural gas liquid recovery energy efficiency through thermally coupled distillation arrangements
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ABC
A
B
C
A B C
B
C
ABC B
C
A
Why? prefractionator arrangement avoids remixing
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Choi Bonggu & Riezqa Andika
Requires 30% less energy
ABC B
C
A
ABC
A
B
C
A
B
C
B C
ABC B
C
A
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TCD Development
ABC
A
B
C
C
A
B
Petlyuk Column Prefractionator Arrangement
Less capital cost & total annual cost
A B
Source: N. V. D. Long, M. Lee - Improvement of natural gas liquid recovery energy efficiency through thermally coupled distillation arrangements
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Choi Bonggu & Riezqa Andika
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Dividing Wall Column (DWC)
Petlyuk
No remixing
Reducing feed mismatch
Thermal efficiency benefit
Difficulties in operation
Dividing Wall Column (DWC)
No remixing
Reducing feed mismatch
Thermal efficiency benefit
One column with balanced pressure
Reduced Energy
Capital Saving
Improved Yield/Quality
Smaller Plot Area
Stable Operation
ABC
A
ABC B
C
A
B
C
Vs.
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Choi Bonggu & Riezqa Andika
DWC Development
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B>30% of feed; C30% of feed; C>A in feed
Side Stripper
Side Rectifier
Petlyuk Column
Top Dividing Wall Column
Direct Sequence
Indirect Sequence
Center Dividing Wall Column
Bottom Dividing Wall Column
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Choi Bonggu & Riezqa Andika
Structural Design of DWC
The structure of each column is determined by using the well known Fenske-Underwood-Gilliland method.
0.5688
0.75 11 1
m mN N R R
N R
,F m
F
m
NN N
N
, ,
, ,
,
ln
ln
D LK F LK
D HK F HK
F m
LK HK
x x
x xN
where &
Structural similarity between sloppy configuration and DWC
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large B in feed , ABBC
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Choi Bonggu & Riezqa Andika
Industrial and Pilot Scale DWC
Source: N. Aspiron, G. Kaibel Dividing wall columns: Fundamentals and recent advances(Montz) PSDC Lab., Yeungnam University
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Choi Bonggu & Riezqa Andika
DWC Internal Column
Source: N. Aspiron, G. Kaibel Dividing wall columns: Fundamentals and recent advances (Montz)
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Process Simulation Application
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Choi Bonggu & Riezqa Andika 16
Conventional MVR
Reboiler Duty (MW)
49.18 4.950
Propylene-Propane Separation - MVR
, >90% energy savings
T: 7.09
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Choi Bonggu & Riezqa Andika
BTX Separation - DWC
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, 20-30% energy savings
Direct seq. Indirect seq. DWC
Reboiler Duty (kW)
1983.4 2279.2 1589
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Choi Bonggu & Riezqa Andika 18
, 30% energy savings
Conventional MVR
Reboiler Duty (kW) 9652 6774
Butane Separation (Debutanizer) - DWC
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Thank You
Riezqa Andika
PSDC Lab., School of Chemical Engineering Yeungnam University Dae-dong 214-1, Gyeongsan 712-749 Republic of Korea (South Korea) Website : psdc.yu.ac.kr/www.yu.ac.kr
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