(2) : :, α. α (3)., (3). α α (4) (4). (3). (1) (2) Antoine. (5) (6) 80, α =181.08kPa, =47.38kPa.. Figure 1.

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1 Continuous Distillation Column Design Jungho Cho Department of chemical engineering, Dongyang university 1. ( ) McCabe-Thiele Method K-value. (1) : :, K-value.

2 (2) : :, α. α (3)., (3). α α (4) (4). (3). (1) (2) Antoine. (5) (6) 80, α =181.08kPa, =47.38kPa.. Figure 1.

3 1.0 Vapor Mole Fraction of Methanol Liquid Mole Fraction of Methanol Figure 1 : (7). (7) : f :, f 5., Figure 2., ( ), (), (- ), (), ( )

4 .. Figure 2. Feed Feed plate Figure 2 : Cold liquid feed... f < 0".. Table 1.. Figure 3. Feed Feed plate Figure 3 : Saturated liquid feed.., f = 0". Table 1..

5 . -. Figure 4 Feed Feed plate Figure 4 : Vapor-liquid two phase feed. f (Table 1 ). Figure 5. Feed Feed plate Figure 5 : Saturated vapor feed. f = 1.. Figure 6.. f > 1. f = 2.

6 Feed Feed plate Figure 6 : Superheated vapor feed Table 1 : (a) (b) (c) (d) (e) Fraction Vaporized, ( f ) Slope f - 1- f Concentration, Mole fraction of Methanol Liquid x B Vapor y D Feed condition Sub-cooled liquid Saturated liquid Two-phase Saturated vapor Superheated vapor 95mole%, 95mole%..,. Figure 7. Figure 7 (0.3385, )..

7 1.0 Vapor Mole Fraction of Methanol Liquid Mole Fraction of Methanol Figure 7 : - (f = 0.5 ). (Rectifying section). Figure 8. V L plate n D x D V n+1 y n+1 L n x n Vn +1 = Ln + D Figure 8 :. Figure 8 (8) (8)

8 MaCable-Thiele... (?) (9). (9) Figure 8 (10). (10) (Reflux ratio). (11) (10) (11) (9). (12) : : Figure 7 Figure 9. Figure 9 (0.95, 0.95). y (0, )

9 1.0 Vapor Mole Fraction of Methanol Liquid Mole Fraction of Methanol Figure 9 : -, (f = 0.5 ) (Stripping section) Figure 10. Lm x m V y m+1 m+ 1 plate m B x B L = V + B Figure 10 :. Figure 10 (13)

10 (13) MaCable-Thiele... (?) (9). (14) Figure 10 (15). (15) (15) (14) (16). (16) (16) ( ). Figure 11. Figure 11.. x Figure

11 Vapor Mole Fraction of Methanol Liquid Mole Fraction of Methanol Figure 11 : Vapor Mole Fraction of Methanol Liquid Mole Fraction of Methanol Figure 12 :

12 3. PRO/II with PROVISION (Chemical Process Simulator). McCabe-Thiele. PRO/II. ASPEN PLUS. McCabe-Thiele -. Figure 13 Figure 15. Vapor Mole Fraction METHANOL Liquid Mole Fraction METHANOL Figure 13 : - () Figure 13 ()..

13 . Figure 14 SRK -. Vapor Mole Fraction METHANOL Liquid Mole Fraction METHANOL Figure 14 : - (SRK ) SRK..

14 Vapor Mole Fraction METHANOL Liquid Mole Fraction METHANOL Figure 15 : - (NRTL ) NRTL - Figure 15. NRTL. NRTL -..,. 1.2bar 50mole%. Flash. PRO/II Flash Keyword. PRO/II Keyword Input Listing TITLE PROJECT=CLASS, PROBLEM=STEP1, USER=JHCHO, DATE=06/19/01 PRINT INPUT=ALL, FRACTION=M, PERCENT=M DIMENSION METRIC, TEMP=C, PRES=BAR SEQUENCE PROCESS COMPONENT DATA LIBID 1,METHANOL/2,WATER THERMODYNAMIC DATA METHOD SYSTEM=NRTL STREAM DATA PROPERTY STREAM=1, TEMPERATURE=25, PRESSURE=1.2, PHASE=M, & RATE(M)=100, COMPOSITION(M)=1,50/2,50 UNIT OPERATIONS FLASH UID=F01 FEED 1 PRODUCT M=2 TPSPEC SPEC STREAM=2, VFRAC, VALUE=0.5 END PRO/II Keyword Output Summary FLASH ID F01

15 NAME FEEDS 1 PRODUCTS MIXED 2 VAPOR LIQUID TEMPERATURE, C PRESSURE, BAR PRESSURE DROP, BAR MOLE FRAC VAPOR MOLE FRAC LIQUID DUTY, M*KCAL/HR FLASH TYPE SPEC-P PRO/II 50% SHORTCUT. PRO/II Keyword Input Listing TITLE PROB=STEP2,PROJ=CLASS,USER=Dr_JHCHO DIME METRIC,PRES=BAR,TEMP=C PRINT INPUT=ALL,RATE=M,PERC=M COMP DATA LIBID 1,METHANOL/2,WATER THERMO DATA METHODS SYSTEM=NRTL STREAM DATA PROP STRM=1,TEMP=81.973,PRES=1.2,RATE=100,COMP=1,50/2,50 UNIT OPERATIONS DATA SHORCUT UID=S01 FEED 1 PROD STREAM=2,PRES=1.05,RATE=50 PROD STREAM=3,PRES=1.30 COND TYPE=TFIX,TEMP=45 EVAL MODEL=CONV,KEYL=1,KEYH=2 SPEC STREAM=2,COMP=2,PERC,VALUE=5 SPEC STREAM=3,COMP=1,PERC,VALUE=5 END PRO/II Keyword Output Summary TOTAL STREAM RATES MOLES WEIGHT LIQUID VOL NORM VAPOR NUM STREAM + PHASE KG-MOL/HR KG/HR M3/HR M3/HR SECTION TRAYS L L TOTALS

16 PRO/II NRTL.. Figure ( 1) ( 2). 100x10 3 Total Costs = (1) + (2) Annual Costs, $ 80x x x x10 3 Annual Operating Costs (2) Initial Capital Costs (1) Reflux Ratio Figure 16 : Utility.. SHORTCUT. - SHORTCUT Table 2 Figure 17. Table 2 : SHORTCUT (PRO/II )

17 16 14 Number of Stages Utility Consumptions Reflux Ratio Figure 17 : - Utility Figure 16 ( ) Figure mole% 95mole% Rigorous R/R min Number of Condenser Total Utility Reflux Ratio Reboiler Duty Tray Duty Costs x x x x x x x x x x x x Simulation. 8 PRO/II Rigorous Simulation Keyword Input.

18 PRO/II Keyword Input Listing TITLE PROJECT=CLASS, PROBLEM=STEP2, USER=Dr_JHCHO, DATE=06/25/01 PRINT INPUT=ALL, RATE=M, PERCENT=M DIMENSION METRIC, TEMP=C, PRES=BAR SEQUENCE PROCESS COMPONENT DATA LIBID 1,METHANOL/2,WATER THERMODYNAMIC DATA METHOD SYSTEM=NRTL STREAM DATA PROPERTY STREAM=1, TEMPERATURE=81.973, PRESSURE=1.2, PHASE=M, & RATE(M)=100, COMPOSITION(M)=1,50/2,50 UNIT OPERATIONS COLUMN UID=T01 PARAMETER TRAY=8,IO=100 DAMPING=0.4 FEED 1,4 PRODUCT OVHD(M)=2,50, BTMS(M)=3, SUPERSEDE=ON CONDENSER TYPE=TFIX, PRESSURE=1.05, TEMPERATURE=45 DUTY 1,1/2,8 PSPEC PTOP=1.2, DPCOLUMN=0.1 PRINT PROPTABLE=PART ESTIMATE MODEL=CONVENTIONAL SPEC STREAM=2,PCT, COMP=2,WET, VALUE=5 SPEC STREAM=3,PCT, COMP=1,WET, VALUE=5 VARY DUTY=1,2 END PRO/II Keyword Output Summary COLUMN SUMMARY NET FLOW RATES HEATER TRAY TEMP PRESSURE LIQUID VAPOR FEED PRODUCT DUTIES DEG C BAR KG-MOL/HR M*KCAL/HR C L M R L STREAM ID NAME PHASE MIXED LIQUID LIQUID FLUID MOLAR PERCENTS 1 METHANOL WATER

TOTAL RATE, KG-MOL/HR 100.0000 50.0001 49.9999 4. ASPEN PLUS PRO/II ASPEN PLUS -. PRO/II 1.2bar 50mole%.

19 TOTAL RATE, KG-MOL/HR ASPEN PLUS PRO/II ASPEN PLUS -. PRO/II 1.2bar 50mole%. PRO/II Keyword Graphic. Figure 17 Figure 23. Figure 17 Flash drum Stream number. Step1.bkp. Figure 17 : Flowsheet of Two-phase Flash

20 Figure 18 : Setup Specification Figure 18 Setup specification'.. Component specification' Next button. Figure 19 : Component Specification Figure 19 Component specification'.. Property specification' NRTL.

21 Figure 20. Figure 20 : Property Specification Figure 21 : Stream Specification,,. Figure 21., Requied Input Incomplete"..,. Next button.

$2bar Vapor fraction 0.5.. ASPEN PLUS. 1.$ $2bar 50mole%(0.5fraction) 82.074 PRO/II 81.$

22 Figure 22 : Block Specification Figure bar Vapor fraction ASPEN PLUS. 1.2bar 50mole%(0.5fraction) PRO/II Figure 23 : Flash Calculation Simulation Results

23 . PRO/II Shortcut' ASPEN PLUS DSTWU'. Figure 24 : Flowsheet of DSTWU for the separation of methanol-water

24 Figure 25 : Block specification fot DSTWU Figure 25 PRO/II Shortcut 1.05bar 1.30bar, Reflux ratio Inpt Changed' Step1.bkp.. Figure 26 : DSTWU Modeling Results Figure 26 PRO/II Shortcut. ASPEN PLUS 4.45 PRO/II 3.85.

25 ASPEN PLUS PRO/II. PRO/II Sub-cooled type ASPEN PLUS Bubble type.. ASPEN PLUS Table 2 Table 3. Table 3 : DSTWU Case Study Results using ASPEN PLUS Table 3 Figure 27. R/R min Number of Condenser Total Utility Reflux Ratio Reboiler Duty Tray Duty Costs Figure 27 : - Utility (ASPEN PLUS)

26 Figure 27 Figure 17 Number of Stages Reflux Ratio Utility Consumptions Rigorous Modeling. PRO/II COLUMN ASPEN PLUS RADFRAC. Figure 28 Figure??. Model library Radfrac Stream Figure 28. Block option Figure 29 Figure 37.

27 Figure 28 : Flowsheet of RADFRAC for the separation of methanol and water Figure 29 : Block specification (1) : Configuration Figure 29 PRO/II 8 Total condenser Top Distillate Rate 50Kmol/hr 2.3..

28 Figure 30 : Block specification (2) : Streams Figure 31 : Block specification (3) : Pressure Profile Figure 31. Bubble condenser. Condenser. Figure 32.

29 Figure 32 : Block specification (4) : Condenser Temperature Specification. 95mole% 95mole%. Figure 33 Figure??. Figure 33 : Block specification (5) : Design specification (1)

30 Figure 34 : Block specification (6) : Design specification (2) Figure 35 : Block specification (7) : Design specification (3) Heavy Key Component 0.05.

31 Figure 36 : Block specification (8) : Variable (1) Light Key Component 0.05 Distillate Rate. Figure 37 Figure 39. Figure 37 : RADFRAC Modeling Results (1)

32 Figure 38 : RADFRAC Modeling Results (2) Figure 39 : RADFRAC Modeling Results (3) 5. - McCabe-Thiele PRO/II ASPEN PLUS..

33 PRO/II ASPEN PLUS.

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e hwp TITLE 'Dew Pressure Calculation for the Condenser Pressure' IN-UNITS ENG DEF-STREAMS CONVEN ALL DESCRIPTION " General Simulation with English Units : F, psi, lb/hr, lbmol/hr, Btu/hr, cuft/hr. Property