空分设备变负荷调节主要参数的关系及计算

33:2005211215;:2006203201:(1968),,,1991,2006,1,2,3(12.,338001;3.,100083):,KDON218000/18000,,,(),,73%106%12,:;;;:TQ116111:AAnalysisandcomputationofmainoperatingparametersforvariable2loadadjustmentofairseparationunitXuFu2gen1,WanJian2yu2,WangLi3(12.GasProducingFactory,XinyuIronandSteelCo1,Ltd1,Xinyu338001,Jiangxi,P1R1China;3.MechanicalEngineeringSchool,UniversityofScience&TechnologyBeijing,Beijing100083,P1R1China)Abstract:Itisoneofimportantmeasurestodecreasetheoxygenventingcapacitybyimprovingtherangeofvariableloadforanairseparationunit(ASU).Asacasestudy,theoreticalanalysisandexperimentalobservationshavebeenconductedonaKDON218000P18000airseparationplantinordertoobservethevariationofmainparameters(includingairflux,oxygenoutput,crudeargonflux,expandingaircapacity,bypassexpansionairflux,argonfractionflux,aircompressorexhaustpressureandflowresistanceoflowercolumn)withapresetvariationofairoutput.Anumericalmodelandexperimentalrelationshiphavebeensetupforthesystemwithpartialvariableloads.Calculationsforeachmainprocessparameterwithadjustableloadrangeof73%106%havealsobeenconductedfortheairseparationplant.Analysisdemonstratesthattheintegralvariableloadrangeofthesystemislessthanthatofeachsinglefacility.Keywords:Largescaleairseparationunit;Variableload;Operatingparameter;Numericalmodel(:)KDON218000/18000,,20034500m31,100m370%105%83©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:VK=VS+VB(1):VK,m3/h;VS,m3/h;VB111,,,,:VS=VOyOO2-yON2yOK-yON2(2):VO,m3/h;yOO2,%;yON2,%;yOK,%112,,,,,,,,:VE=VB+VES(3):VES,m3/h;VE,m3/h,,,11211:(VLK+VLN)yOK=VLKxOLK+VLNxOLN(4)VNyON2+VOyOO2=(VES+VLK+VLN)yOK(5)1m3/h,:VES+VLK+VLN=1(6)VN+VO=1(7):VES=1-xOLN-xOLKyOK-xOLKVLN(8)VN=yOK-yOO2yON2-yOO2(9):VLN,m3/h;VN,m3/h;VLK,m3/h;xOLN,%;xOLK,%11212:R==VLN(1-)VN-VLN(10)VLN=VN1-R+=yOK-yOO2yON2-yOO21-R+(11)93©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=1-xOLN-xOLKyOK-xOLKyOK-yOO2yON2-yOO21-R+,:VES=Vs-xOLN-xOLKyOK-xOLKyOK-yOO2yON2-yOO2Vs1-R+(12):R;,=8%[1]11213(Q1)(Q2)(Q3),:QA=Q1+Q2+Q3(13),,,,,,,,1m3:q1=OOcPOT+PNNcPNT+WNNcPNT(14):ONWN;;T,K;,kgPm3;cP,kJ/(kgK),,(14),q1=215923kJPm318000m3/h300m3/h690m3/h,1m351817kJ39914kJ,:Q3=51817VLO+39914VLA:VLO,m3Ph;VLA,m3Ph1m3:q3=41791kJPm3,,,,,Q2=QA-(Q1+Q3)=QA-VK(q1+q3),8115%(P1=01883MPa,P2=0114MPa,T1=177K,T2=112K):h=4930-3250=1680kJ/kmol,=0186,:QE=VEh2214QA=VEh018152214=791141VE,1m3q2=212104kJ/m3,,:VE=0109328VK+2392169(15),(15)(12)(3),:VB=xOLN-xOLKyOK-xOLKyOK-yOO2yON2-yOO2VS01906721-R+-VS+2638184(16)VS(2),(16)VB,VK=VS+VB18000m3/h,,12211,,,,(V23)(V21V2701):04©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(104m3/h)/(104m3/h)/(m3/h)/(m3/h)/(m3/h)/(m3/h)106%9152912819345880414247118311276123103%9126910118797158555122247615611031178100%9817518250830618524811281078713297%817481491770215805618624861011054218794%8148812317155780716824901741029814191%812171961660715755814924951461005319688%71957171606073091312500119980915185%71697144155121570601132504192956510582%71437118149656810195250916493201679%71166191144171565611172514137907611476%6196165138706312159251911883116973%616461391332215606314125231828587123:,VLN=VDyOK-xOLKxOLN-xOLK(17)VLK=VDyOK-xOLNxOLK-xOLN(18):VD,VD=VK-VE,m3/h100%(17)(18),:VLN=0145012VD(17)VLK=0154988VD(18)(17)(18),212,,2,11:P2=61347e010542VD(19):P2,kPa3,2/(m3/s)/kPa/(m3/s)/kPa251642252613241201572314251473525152410882323122513878725169231932082325134757251423192222192512518625147231911932219251147592511231872392218241963732417231710442217241906824152316044221662418438424142315245622162417639924122313628622132417179241223133264221324169196241123111678221224166804242219062222105241596231922187676221042415400923177221772992224153203231672217407522241491222317221685342224149097231662216450421192414358223172213730321182414181823177221317112117514©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:P1=w22g:,w,mPs;gw=VS=100TVK273SP:S,m2;P,kPa;T,K,:2gS2=1145,P1=17862VKP2(20)312,,,,,[2]:,;,,:Q=KFt(21):Q,kJ;t=tD-tM,tM,tD,K;K,kJ/(m2hK);F,m2:QC=VDhD-(VLNhLN+VLKhLK)2214(22):QC,kJ;hD,kJPkmol;hLN,kJPkmol;hLK,kJPkmolTPhxyP=564kPa,T=101K,:hD=7503+2512=10015kJ/kmolP=564kPa,xOLK=38%O2,:hLK=5829kJ/kmolP=544kPa,xOLN=01001%O2,:hLN=3650kJPkmol(17)(18)(22),:QC=23016612VDK,t=118K,(21),:KF=272915kJ/KtD=QCKF+tM=010845VD+tM,,a=3196846,b=3081924,T=931667K,:PT=105196846-3081924010845VD+931667(23):PT,kPa313,:P=PT+P1+P2(24),:AP3+BP2+C=0,,,BC324©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(104m3/h)/(m3/h)B/102C/107/kPa106%915283924-5167-1125611145103%912681568-5163-111860612100%979213-516-111260119697%817476858-5157-110559714394%814874502-5154-91959311291%812172046-5151-91359717688%719569690-5148-81715841485%716967335-5145-811558010882%714364980-5142-71657517479%711662524-5139-710857114676%61960169-5135-615756612773%616457813-5132-61085611964,[014MPa(G,)],411,70%105%,,,,18000m