s3 3 Unit Operation 1

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    Session 3.3

    Aspen Hysys -Unit Operation

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    Revise

    Cch thit lp mt qu trnh m phng?

    Tin hnh m phng trn Aspen Hysys

    Basis Manager: component, FP, hypothetical,RXN,..

    Simulation Enviroment:

    + Thm dng vt cht (tnh ton flash, s dngutilities, in bo co stream v workbook)

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    Unit operation

    Steady state Unsteady state

    Physical Reactors(General, CSTR, PFR)

    Movers (Pump, Compressor, Expander, Valve)

    Mixer

    Splitter (Tee)Exchangers (Air Cooler, Heater/Cooler, Heat

    Exchanger, S&T LNG)

    Flash Drums (2-phase (VL), 3-phase (VLL))

    Separators (Component Splitter, Distiller,

    Absorber, CycloneCyclone, Gas filterfilter, Extractor)

    Pipe segment

    Tank

    FurnaceF

    Air Cooler

    Logical Set

    Adjust

    Recycle

    Balance

    Spreadsheet

    PID Controller

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    Phng php Thc hin

    S dng thanhmenu

    T mc Flowsheet trn thanh menu, la chn AddOperationHocnF12.

    CasUnitOpssxuthin.SdngWorkbook M Workbook v chuyn n mc UnitOps, sau

    kch vo nt AddUnitOp.CasUnitOpssxuthin.

    Sdngbngni T mc FlowSheet trn thanh menu, la chn OpenObject Palette, hoc n F4. Kch p vo biu tngcathitbm chng ta munnhp.

    S dng bng nikt hp vi s trn mn hnh

    Sdngchutphi,ko v thbiu tng tbngnivo strn mn hnh.

    Cch a cc thit b votrong PFD

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    Cch 2. UnitOps (F12)

    Cch 1.Object Palette (F4)

    Cch a cc thit b votrong PFD

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    Kt ni dng vi cc thit b Open unit operation window

    Choose stream to connect from Inlet and Outlet drop down menus

    Some unit operations require energy streams as well

    If the name of a stream that does not exist is entered manually, HYSYS

    will create that stream

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    3.3.1. Pumps

    Mc ch: tng p sut ca dng lng vo. Tythuc vo tham s c khai bo ban u s tnhton nhit , p sut cha bit, hoc cng sut

    ca bm Mc tiu:

    Thit lp c bm trong Hysys m phng ccqu trnh bm

    Kt ni cc dng vi thit b

    Xc nh cng sut ca bm v nhit dng ra

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    Pumps - Nguyn l tnh ton

    Cc tnh ton c da trn phng trnh chun cho cng sut,s dng tng p, tc v cng dng chy:

    Trong : Pout= p sut dng ra

    Pin = p sut dng vo bm

    DensityLiquid

    RateFlowPPquiredPower inoutideal

    )(Re

    Cng sut cn thit thc t ca my bm c xc nh theo

    hiu sut bm:%100

    Re

    Re(%)

    actual

    ideal

    quiredPower

    quiredPowerEfficiency

    Khi hiusutnhhn100%, nng lngdscdng tngnhitcadng ra.

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    Pumps - Nguyn l tnh ton

    Kthpnhngphngtrnh trn, sccng sutcnthitthctcamy bm:

    (%)

    %100)(Re

    EfficiencyDensityLiquid

    RateFlowPPquiredPower inoutideal

    Nu nh dng nguyn liu c xc nh y , ch cn cung cphai trong nhng bin sau Pumpc th tnh ton tt c cc bin chabit:

    p sut dng ra hoc s gim p sutHiu sutNng lng bm

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    Pumps - Design

    Pumps can be specified in two ways:If inlet and outlet streams connected to a pump are fully specified, then

    nothing needs to be specified in the pump unit operation

    If outlet pressure is not specified, then a pressure differential across the

    pump, or a duty must be specified

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    PumpsExample

    Dng Feed:

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    PumpsExample

    Thit lp pump vi cc thng s sau:

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    PumpsExample

    Kt qu

    Ch rngnunhbnkhngchn On Pump Switch, trngthi ca dng Feed s c

    chuynthngsang Outlet.

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    3.3.2. Compressor/Expander

    Mc ch: My nn (Compressor) l thit b dng tng p sut dng kh

    vo. Ph thuc cc thng tin c cho trc, my nn s tnhton cc tnh cht khc ca dng (nh p sut hay nhit )

    hoc hiu sut nn. Tuc bin gin n kh (Expander) l thit b c s dng lmgim p ca dng kh vo c p sut cao to ra dng ra vip sut thp v vn tc nhanh. Qu trnh gin n bao gm qutrnh chuyn ni nng ca kh sang ng nng v cui cng lsang cng c ch.

    Mc tiu:Sau khi hc xong ngi s dng c th: Thao tc vi Compressor/Expander trong Hysys m phng

    qu trnh ch bin kh Xc nh cng sut ca Compressor/Expander v nhit u

    ra ca dng

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    Compressor/ExpanderNguyn l

    i vi my nn, hiu sut ng entropy c tnh bng t s ca nng lng ngentropy yu cu cho qu trnh nn vi nng lng yu cu thc t

    i vi thit b Expander, hiu sut c cho l t s ca nng lng thc t c to ratrong qu trnh gin vi nng lng to ra trong mt qu trnh gin ng entropy

    Power Requiredactual= Heat FlowoutletHeat Flowinlet

    Power Producedactual= Heat FlowoutletHeat Flowinlet

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    Compressor/ExpanderNguyn l

    Hiu sut

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    Compressor/ExpanderCc hng gii quyt

    Khng dng th Dng th

    Bit Flow ratev Inlet Pressure

    Khai bo Outlet Pressure

    Khai bo Adiabatic or Polytropic efficiency

    (Hiu sut ca ch on nhit hoc a bin)

    HYSYS s tnh ton c:Required Energy

    Outlet temperature

    Other efficiency

    Bit Flow ratev Inlet pressure

    Khai bo Operating speed

    HYSYS s dng biu Xc lp Efficiency

    Xc lp HeadHYSYS tnh ton:

    outlet pressure,

    outlet temperature,

    applied duty

    Bit Flow ratev Inlet Pressure

    Khai bo Efficiencyand Duty(Hiu sut v Nng sut)

    HYSYS s tnh ton:Outlet pressure

    Outlet temperature

    Other efficiency

    Bit Flow rate vefficiency

    HYSYS ni suy t biu xc lp:operating speed

    head

    HYSYS tnh ton:

    outlet pressure

    outlet temperature

    applied duty

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    Mc Connection tng t nh vi my pump

    Parameters Page

    Compressor/ExpanderDesign

    Nu khng s dng cc th, cung

    cp bn trong s cc bin s sau,v gi tr th 5 s c tnh ton,theo cng sut:Nhit dng vop sut dng voNhit dng ra

    p sut dng raHiu sut

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    Tab Rating

    Tab Rating bao gm 4 trang: th(Curves), Gii hn dng (Flow Limits),Nozzles, v Inertia.

    Curves Page

    1. Chn hp Enable Curves.2. La chn hiu sut on nhit hay a

    bin, s dng phm tng ng. y l cs xc nh gi tr hiu sut dng vo.

    3. Bm vo phm Add Curve vo giao dinCurve.

    4. Trn giao din hin th Curve, bn c thnhp cc im d kin Flow, Head v%Efficiency, cng nh gi tr Speed chomt th n.

    5. Vi mi th thm vo, thao tc li bc3 v 4. Loi hiu sut phi thng nht vi

    tt c th a vo.

    Compressor/ExpanderDesign

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    Dng nguyn liu

    Compressor/ExpanderExample

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    Thit lp My nn

    Compressor/ExpanderExample

    1. Trn trang Parameter, xa gi trAdiabatic Efficiency mc nh. C hiusut on nhit v a bin nn

    trng trnh li khng ng nhthoc cung cp tha c tnh cho mynn.

    2. Vo tab Rating, v m trang Curves.3. Chc chn rng phm on nhit

    (Adiabatic) trong nhm Efficiency

    c chn.4. Chn hp Enable Curves, v bmvo phm Add Curve.

    5. Hon thnh thit lp th nh tronggiao din sau.

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    Cc iu kin ca dng ra c th c xem tab Performanceca bng hin th tnh cht Compressorv c biu din nh bng di y:

    Compressor/ExpanderExample

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    3.3.3. Heater and Cooler

    L thit b trao i nhit mt chiu. Dng vo c lm lnh hocgia nhit t c iu kin yu cu dng ra. Dng nng lnghp th (hoc cung cp) do chnh lch Enthalpy gia hai dng.Cng c m phng ny hu ch khi ch quan tm ti dng nnglng yu cu bao nhiu lm lnh hoc gia nhit dng qu trnh,

    m khng quan tm n iu kin khc.

    Biu tng Cooler Biu tng Heater

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    Heater and CoolerNguyn l

    Cooler v Heater s dng cng mt phng trnh c s. Skhc nhau theo quy c v du. Xc nh r dng nng lngtuyt i ca cc dng v Hysys s thm cc gi tr sau:

    - Vi Cooler, Enthalpy v dng nhit nng b tr t dng vo:

    Heat Flowinlet- Dutycooler= Heat Flowoutlet

    - Vi Heater, dng nhit nng c cng vo:

    Heat Flowinlet+ Dutycooler= Heat Flowoutlet

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    Heater and CoolerDesign

    Like pumps, heaters and coolers can be specified in two ways

    If both the inlet and outlet streams are fully specified, then nothing needsto be specified in the pump unit operation

    If the outlet stream is underspecified, then the heater or cooler can be

    solved by specifying the pressure differential and/or the duty

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    Heater and CoolerExample

    Mt dng kh cn lm lnh tnhit 60F ti 105F vi gim p sut 15 psi.

    PropertyPackage

    Components

    Peng

    Robinson

    Nitrogen, Carbon

    Dioxide, C1, C2,

    C3, i-C4, n-C4, i-

    C5, n-C5, n-C6, n-

    C7, n-C8

    Worksheet

    [Conditions]

    Temperature 60.0000 FPressure 600.0000 psi

    Molar Flow 100.0000 lbmole/hr

    Worksheet

    [Composition]

    Nitrogen 0.0149

    CO2 0.0020

    Methane 0.9122

    Ethane 0.0496

    Propane 0.0148

    i-Butane 0.0026

    n-Butane 0.0020

    i-Pentane 0.0010

    n-Pentane 0.0006

    n-Hexane 0.0001

    n-Heptane 0.0001

    n-Octane 0.0001

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    Heater and CoolerExample

    Kt qu

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    3.3.4. Shortcut distillation

    Mc ch: xc nh nhanh s a l thuyt ti u ng vi t s hilu ca thp

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    Cu t(Component)

    Mole Fraction

    Ethylene 0.0002

    Ethane 0.0002

    Propene 0.5734

    Propane 0.0246

    i-Butane 0.0051

    i-Butene 0.0489

    1-Butene 0.0235

    13-Butadiene 0.1295

    n-Butane 0.0032

    cis2-Butene 0.0061

    tr2-Butene 0.0072

    n-Pentane 0.031

    n-Hexane 0.028

    n-Octane 0.0255

    Toluene 0.0936

    Tn dng

    (Name)

    Feed

    Temperature

    (oC)

    83.3

    Pressure (bar) 24

    Flowrate (kg/h) 24000

    Dng nguyn liu c thm vo vi s liu sau

    Shortcut distillation

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    Trn Connections page ca design tab nhp y cc thng tin chodng c kt ni vi thit b:

    Shortcut distillation

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    Trn Parameters page ca design tab nhp y cc thng s hotng ca thp:

    Shortcut distillation

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    Sau khi nhp y s liu, Hysys s tnh ton, kt qu tnh ton chin th trn Performance tab.

    Shortcut distillation

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    S liu kho st th hin di dng bng:

    Shortcut distillation

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    S liu kho st th hin di dng th:

    Shortcut distillation

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    th thu c khi x l s liu thu c t Hysys.

    Shortcut distillation

    Khao sat so dia ly thuyet toi uu

    50

    55

    60

    65

    70

    75

    80

    8590

    95

    1 1.25 1.5 1.75 2 2.25 2.5 2.75

    Rf

    N(Rf+1)

    + Ch s hi lu l 1.75+ S a l thuyt ti ul 28 a+ a np liu ti u: as 4

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    Others Modules

    Mixers/Tees Recycle operations Splitters

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    Task 3.3

    Nhm

    c v dch ti liu 3.3.2. HYSYS styrene InductiveHn np:

    c thm ti liu SSModel

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    W l 10% f h t d 20% f h t h 30% f h t 50% f h t d h

    Learning outcome in Session 3.3

    Thnh tho cc thao tc vi Hysys

    Cch thm mt s cc Unit phc v cho

    cc bi ton (a cc thng s, kt ni vidng,..)

    Hiu c mc ch, cch thc hot ngca mt s cc thit b. n li kin thc camn thit b phn ng v mn Thit b trongcng ngh Lc du