ASPEN Plus課件-分離單元的仿真設計

CAPD基礎第八講SimulationDesignof_SeparationProcesses分離單元的仿真設計B（三）塔設備單元模型一分類塔設備（Columns）單元共有9種模塊1.DSTWU2.Distl3.RadFrac4.Extract5.MultiFrac5.SCFrac5.PetroFrac5.RateFrac5.BatchFrac塔板設計RadFrac塔板設計(Traysizing)計算給定板間距下的塔徑。可將塔分成多個塔段分別設計合適的塔板。在Specification表單中輸入該塔段(Trayedsection)的起始塔板(Startingstage)和結束塔板(Endingstage)序號，塔板類型(Traytype)，塔板流型程數(shù)(Numberofpasses)，以及板間距(Trayspacing)等幾何結構(Geometry)參數(shù)。E]i固TrayRatingFackSizingFackRatingPropertiesEstimates「nTitzoyc^otino-SiRAIiFRAi:El-inimumcolumndiameter:Travspacing:Capslotareatoactivearearatio:^ieveholeareatoactivearearatio:?ProcessFlo...BlockRADF...2Sieve^sdC：\...xajTiples\l>kp\分離單元C2)RadFrac

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劍?|洱|?ii?JJ??JJa囪'IJ??5E-S-RadFrac一塔板設計(2)塔板類型提供了五種塔板供選用：匾1、泡罩塔板(BubbleCap)f2、篩板(Sieve)3、浮閥塔板(GlistchBallast)i4、彈性浮閥塔板(KochFlexitray)三5、條形浮閥塔板(NutterFloatValve)RadFrac一塔板設計（3）因TraySizing'EfficienciesReactionsCondenserHcurvesReboi1erHcurves四2TrayRatingFFLACSetupDesignSpecsVaryHeatersCoolersFuinp:irourLdEDecaters-Profiles^/SpecificationsDesignIResultsTra^edsection2SieveB_lgggpTrayg>iyspacing:MinimumcohSieveholeareatuactiveareardtiu：SieveGlitschBallastKochFlexitrayNutterFloatValveCapslutareatuaizterarudrutiu：Startingstage:<-Endingstage:Numberofpasses:4720.3meter0.3048meter0.120.12^ProcessFlo...BlockRADF...C:..KampleE\bkp\分離單元(2)]±k732^1al^l±1四1V|固[t|SI-CBARE-:s-i?/i?JJ??Jl結果(Results)表單中給出計算得到的塔內徑(Columndiameter)、對應最大塔內徑的塔板序號(Stagewithmaximumdiameter)、降液管截面積/塔截面積(Downcomerarea/Columnarea)、側降液管流速(Sidedowncomervelocity)>側堰長(Sideweirlength)RadFrac

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一?塔板設計⑺RadFrac--塔板核算塔板核算(Trayrating)計算給定結構參數(shù)的塔板的負荷情況，可供選用的塔板類型與“塔板設計”中相同。“塔板設計”與“塔板核算”配合使用，可以完成塔板選型和工藝參數(shù)設計。RadFrac一塔板核算(2)“塔板核算”的輸入參數(shù)除了從“塔板設計”帶來的之外，還應補充塔盤厚度(Deckthickness)和溢流堰高度(Weirheights)，多流型塔板應對每一種塔盤都輸入堰高。VaryHeatersCoolersfijjTiparouTLdsHecant.ereE￡￡icienciesReactionsCondenserHcurvesRetoilerHcurvesTraySizingTrayKatiri^?,回2PackSizingPackRatingPropertiesEstimatesConvergeneeWeirheightsmeter二metermeter二meter二0.05TrayedsectionTraygeometryDiameter:NumberofTrayspacing:Startingstage:Traytype:|Design/F'drop|LayoutDowncomers|Results|1彐|GlitschBallast0.6meter▼0.3meter▼I1C：..xaiTiples'i.bkpV分離單元C2)RadFrac一塔板核算（3）3|SI-CBAR二]嶺|?||^l2ll口1趣IN*l'lllll'AspenPlus-RadFrac-exa>ple5.bkp-[BlockRADFRAC(RadFrac)TrayRating■-■□回?FileEditViewDataToolsRunFlotLibraryWindowHelp-51X□|益Q|__|松口M麁I電KMn>|[1|?>HII_a|洱a/?_J_J??_J_J向■s'…：…：：■……■………：：…：：■………：&JJ???RadFrac一塔板核算(4)在塔板布置(Layout)表單中輸入：?浮閥的類型(Valvetype)、材質(Material)、厚度(Thickness)、有效區(qū)浮閥數(shù)目(Numberofvalvestoactivearea)；?篩孔直徑(Holediameter)和開孔率(Sieveholeareatoactiveareafraction)=VaryHeatersCoolersFuiTiparourLdsHecantersEfficiencieReactionsCondenEerHcurveReboilerHcurvesTraySizingTrayRatinp;一'i_1■>四2PackSizingFackRatingFropertiezEstimatesConvergenceValvetrayType:ValvetypeV-1二Thickness:1E；GAUGE二(?Numberofvalvesloactivearea:C

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在降液管(Downcomer)表單中輸入:?降液管底隙(Clearance)；?頂部寬度(Widthattop)；?底部寬度(Widthatbottom)?直段高度(Straightheight)-Optional-Residencetime:owncomergeometrvNumberofpasses:SideClearance:20mmWidthattop:150mmWidthatbottom:125mmStraightheight:200mmDistancetowall:Edgetype:|secFloodinglimit:||0.5CA..■xamples\bkp\好離單元(2)RadFrac一塔板核算⑻n1

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洱1免1▼「■|||||'AspenPlus一RadFrac—example5.bkp一[BlockRADFRAC(RadFrac)TrayRating...||□||X|SI-CBAFI]列嶺I?irFileEditViewLataToolsRuilFlotLibraryWindowHelp—73211口1HJJ???i?_J_J??_J'lga-:□■B…RadFrac一塔板核算(9)塔板核算結果在結果(Results)表單中列出，有三個參數(shù)應重點關注：1、最大液泛因子(Maximumfloodingfactor)，應該小于0.8；2、塔段壓降(Sectionpressuredrop)3、最大降液管液位/板間距(Maximumbackup/Trayspacing)，應該在0.25~0.5之間。RadFrac一塔板核算（io）±L±I>>|□N>|匿HJ=▼J|SI-CBAR3ForHelp,pressFlC：\...xamples\bkp\分離單元(2)+V\VaryHeatersCoolersSpecs!*/Design/PdropI</Ldyoui：|'DowncomersResultsProfilesHyiLaniicIlyii：=jtiicEquipment0.377838810.11335164meter0.18433747Funip：±rouil'IeIlec：=ULter5Ef￡icienciesKeactions「TrayratingsummaryMaximumbackup/Trayspacing:ConderLserHcm'veeKeb0i1erHcurveyTraySizingiaDowncomerresultsBackup:Maximumvelocity/Designvelocity:|-_IrayKatin^x_上加11------/f*~|PackSizingP~|

PackKatingPropertiesQEstimatesQC0mrergenceQReportMUserSuhroutinesSldye.Location:Sectionendingstage:47(Maximumfluudinqfactor:0.74260993、Stags-38JPanel:Sectionpressuredrop:0.170E.AE.LI8h.=?r51XgjgjgjII叫e|發(fā)||兔|卻|啲刎!±||扇扇迦|遇1|*1備1園-W?AspenPlus-RadFrac-eza>ple5.bkp-[BlockRADFRAC(RadFrac)TrayRating1-DataBrovser]|^~|[5c~|_FileEditViewDataToolsRunPlotLibraryWindowHelpTferfErac—應用示例(5)在示例(4)的基礎上進行塔板設計和塔板核算，分別選用浮閥塔板和彈性浮閥塔板計算后對比結果。RadFrac--填料設計填料設計(Packsizing)計算選用某種填料時的塔內徑。在Specification表單中輸入填料類型(Type)、生產廠商(Vendor)、材料(Material)、板材厚度(Sheetthickness)>尺寸(Size)、等板度(Heightequivalenttoatheoriticaplate)等參數(shù)。RadFrac一填料設計（2）■ll|ll'AspenPlus—RadFrac-exa>ple6.bkp-[BlockRADFRAC(RadFrac)PackSizing1—DataBr...|^||□||X|口1幽I盼|51-UBAHStichlmair]Results]Profiles]pecificationackingsection弓Endingstage:Tvpe:|mELLAPAK—三]Startingstage:PackingcharacteristicsVendor:SULZEFIMaterial:STANDARD▼-mPackSizingBlockRADF...2Packingfactor:Sheetthickness:-Packedheight—Heightequivalenttoatheoreticalplate(HETP):CSectionpackedheight:ruiTiparcmndEerscinsCondenEerHcurveeFLeboilerHcurvesTraySizingTrayRating+aPackRatingPropertiesEstimates▼1▼0.35meter二meter二C：\...xajTiples\bkp\分離單元(2)拉西環(huán)(RASCHIG)鮑爾環(huán)(PALL)階梯環(huán)(CMR)矩鞍環(huán)(INTX)超級環(huán)(SUPERRING)RadFrac一填料設計(3)填料類型共有53種填料供選用，以下是5種典型的散堆填料：、、、、、12345RadFrac一填料設計⑷填料類型共有53種填料供選用，以下是5種典型的規(guī)整填料：1、帶孔板波填料（MELLAPAK）2、帶孔網波填料（CY）3、帶縫板波填料（RALU-PAK）4、陶瓷板波填料（KERAPAK）5、格柵規(guī)整填料（FLEXIGRID）SetupDesignSpecsVaryHeatersCoolersPwiparoiitl'IeHecantersE￡ficienciesReactionsCondenserHem-veeReboilerHcurvesTraySizingTrayRatingPackSizing32PackRatingFropertiesEstimatesA^/SpecificationsEndingstage:|21MELLi-F'AK」PackingcharacteristicsVendor:==Material:Size:25D<：▼CMFlEIEFILINTXPALLFIASCHIGSUPEFI-FIINGSUF'EFI-F'AKHYF'AKIMTF1SUREFl-INTXSNOWFLAKECOILDIXON-PackingsectionStartingstage:2SulztrBtllarslistructnr?■!piclimePackingfactor:Sheetthickness:-Packedheight—(*Heightequivalenttoatheoreticalplate(HETP):0.35CSectionpackedheight:SULZEFI▼STANDARD▼BlockRADF...CA...xajriples\bkp\分離單元(2)RadFrac一填料設計（5）'lllll'AspenPlus一RadFrac-exaMplefi.bkp-[BlockRADFRAC(RadFrac)PackSizing1-DataBr---口"X|FileEditViewDataToolsRutlPlotLibraryWindowHelp_fi1X□Q陁@|h?口|*?|禽N*?t>H豆a?asi|SI-CEIAFI々IId32^1口11N*lRArF?/y?_J_J??_J_J_J_Jafit:l■■…S-E-■■……■……■……■……■……■…:…：…■……■…一■■…□■...................S-■■……■………-10FISSeCOpr0RadFrac一填料設計⑹結果(Results)表單中給出計算塔內徑(Columndiameter)＞最大負荷分率(Maximumfractionalcapacity)最大負荷因子(Maximumcapacityfractor)、塔段壓降(Sectionpressurdrop)、比表面積(Surfacearea)等參數(shù)。RadFrac--填料核算填料核算(Packrating)計算給定結構參數(shù)的填料的負荷情況，可供選用的填料類型與“填料設計”中相同?！疤盍显O計”與“填料核算”配合使用，可以完成填料選型和工藝參數(shù)設計。RadFrac一填料核算（2）PackSizing回2FropertieeTrayRatingTraySizingReboilerHcurveeConderLEerHem-veeReactionsEf￡icienciezIlec

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一應用示例（6）在示例（2）的基礎上進行填料設計和填料核算，分別選用MELLPAK和RALU-PAK計算后對比結果。RadFrac一吸收計算RadFrac

模塊用于吸收計算時，1)在Configuration表單中將冷凝器和再沸器類型選為“None”；2)在Streams表單中將塔底氣體進料板位置設為塔板總數(shù)加1，并將加料規(guī)則(Convention)設為“Above-Stage”；RadFrac一吸收計算⑵SetupJDesignSpecsVaryHeatersCoolersPwiparoioil'IeHecantersEfficienciesReactionsCondenserHcurvesReboilerHcurvesTraySizingTrayRatingFackSizingABSORBERaBlocksF'ropertieeStreams=^ProcessFlo...BlockABSO...「ProductstreamsNameStagePhaseBasisFlowG-OUT1VaporMoleL-OUT30LiquidMhIaCA...xamples\bkp\分離單元C2)|ResuitsAvailableRadFrac一吸收計算⑶QSetup|SI-CEIAFI73社|_<^^i32^1口1_1盼|>11?11??11111'RadFrac一吸收計算⑷在收斂(Convergence)項目中將1、基本(Basic)表單里的算法(algorithm設置為“Standard”，并將最大迭代次數(shù)(maximumiterations)設詈為200;2、將高級(Advance)表單里的第一欄吸收器(Absorber)設置為“yes”。SetupDesignSpecsVaryHeatersCoolersFiunparoimdsDecantereE￡￡icienciesReactionsCondenserHcurveReboilerHcurvesTraySizingTrayRatingFackSizingFackRatingFropertieeEstimatesConvergence^ReportABSORBER=ProcessFlo...BlockABSO...Initializationmethod:Dampinglevel:Liquid-liquidphasesplittingmethod:Solidshandling:Standard▼IForHelp,pressFlCA...xamples\bkp\好離單元C2)■ResultsAvailableRadFrac一吸收計算（5）1FileEdi彐2d口陶NilwConverg?_Aspen?JJ?JJ??JJJJJJ????RadFrac一吸收計算⑹?AspenPlus-absorber-1.bkp-[BlockABSORBER(RadFrac)Convergence-DataBro...□||X|_FileEdi+ViewDataToolsRutlFlotLibraryWindowHelp-51XD|這|H|錮Bd

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n*|咖卜卜卜|?|願|縫|?|華|備|扣|EQConvergence醺ABSOJtBERjL-ondenserHcm'TesReboilerHcurvesTraySizingTrayRatingPackSizingPackRating2Absorber:_SIr~Dirncth.Dtmax:Eff-Flash:NoFlash-Maxit:50Flash-Tol:Flash-Tolil:1E-07Flash-Vfrac:Flexi-Meth:Bulletin960Float-Meth:AspenHljFminfac:Hmodell:廠CA..■xainples\bkp\分離單元(2)廠「r|ResuitsAvailableRadFrac一吸收示例(1)摩爾組成為CO2(12%)、n2

(23%)和H2

(65%)的混合氣體(F=1000kg/hr.P=2.9MPa、T=20C)用甲醇(F=60t/hr、P=2.9MPa、T=-40C)吸收脫除CO2。吸收塔有30塊理論板，在2.8MPa下操作。求出塔氣體中的印2濃度。RadFrac一吸收示例（2）在吸收示例（1）的基礎上求使出塔氣體中的002濃度達到0.5%所需的吸收劑（甲醇）用量。RadFrac一吸收示例(3)在吸收示例(2)的基礎上求使出塔氣體中的CO2濃度達到0.5%所需的吸收劑(甲醇)用量與理論板數(shù)的關系。RadFrac一吸收示例(4)選用10塊理論板，求使出塔氣體中的CO2濃度達到0.5%所需的吸收劑(甲醇)用量以及采用典型塔板和填料時的塔徑。RadFrac--脫吸計算脫吸是吸收的逆過程，脫吸計算與吸收計算的模型參數(shù)設置相同，只是物料初始組成不同。RadFrac一脫吸示例(1)將吸收示例(4)所得到的吸收富液減壓到0.15MPa進行閃蒸，低壓液體再進入脫吸塔在0.12MPa下用氮氣進行氣提脫吸，要求出塔貧液中的^2濃度達到0.1%。求合理的理論板數(shù)、所需氮氣流量、采用不同塔板和填料時的脫吸塔尺寸、壓降和負荷情況。Extract

一連續(xù)萃取塔Extract模塊用逐級計算法精確計算連續(xù)逆流萃取過程的操作結果。Extract一連續(xù)萃取塔（2）Extract--連接Extract模塊的連接圖如下：L1Phase■Sidefeeds__(anynumber)L1Phaser1Nstagel_2PhaseSideproducts(anynumber)—l_2PhaseExtract

一模型參數(shù)Extract模塊有四組基本模型參數(shù)：1、塔設定(Specs)表單1)塔板數(shù)(Numberofstages)2)熱狀態(tài)選項(Thermaloptions)—(1)絕熱(Adiabatic)(2)指定溫度剖形(Specifytemperature…-(3)指定熱負荷剖形(Specifyheatduty…^ProcessFlo...BlockEXTR...SetupComponentsPropertiesStreamsBlocksEXTRACTI??!?IOI??SetupEfficienciesPropertiesEstimatesConvergenceReportDynamicBlockOptionsResultsProfiles■ZVFfllUArij=ihlp?Configuration—Numberofstages:rJ「T-1StageTemperature|C2d來PressureHeatStreamsThermaloptionsAdiabatic「SpeciiytemperatureprofileC

SpeciiyheatdutyprofiledutyprofiloStage.Heatduty|MMkcal/▼來0Setup[METCHE刁2Zl口1幽I限IForHelp,pressFl||E:\???xamples\|±P|||,i分離單元(2)NUM1|FlesultsAvailableExtract

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一模型參數(shù)(3)2、關鍵組分(Keycomponents)表單(1)第一液相(1stliquidphase)即比重較大的液相，從塔底出料。(2)第二液相(2ndliquidphase)即比重較小的液相，從塔頂出料。Extract

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