大型空分设备卧式垂直气流分子筛吸附器内的流场特征分析

:20110120:,,1986,,大型空分设备卧式垂直气流分子筛吸附器内的流场特征分析1,2,3,4,5,6(124,38310027;356,388310004):为了更好地研究大型空分设备分子筛吸附器内的流场特征,建立了以单根2根和3根多孔管结构为气流分布器的60000m3/h空分设备卧式垂直气流分子筛吸附器结构的数学模型,并采用FLUENT软件对其内部速度场分布进行数值分析比较计算结果显示,采用2根多孔管结构的分子筛吸附器在流场分布和生产成本上都比其他两种结构更优,与20000m3/h空分设备卧式垂直气流分子筛吸附器相比,气流分布均匀性有所下降:分子筛吸附器;卧式;垂直气流;流场模拟:TB662:BAnalysisoffeaturesofflowfieldinhorizontalverticalgasflowmolecularabsorberoflargesizedairseparationplantHuDi1,JinTao2,ZhouZhiyong3,TangKe4,LinXiuna5,GuYanxin6(1,2,4.InstituteofRefrigerationandCryogenics,ZhejiangUniversity,38#ZhedaRoad,Hangzhou310027,Zhejiang,P.R.China;3,5,6.DesigningInstitute,HangzhouHangyangCo.,Ltd.,388#DongxinRoad,Hangzhou310004,Zhejiang,P.R.China)Abstract:Inordertowellstudythefeaturesofflowfieldofmolecularabsorberinlargesizedairseparationplant,themathematicmodelisestablishedforhorizontalverticalgasflowmolecularabsorberin60000m3/hairseparationplantwithgasflowdistributorofsingle,2and3perforatedtubestructure,andtheinnerspeedfielddistributionisnumericallyanalyzedwithFLUENTsoftware.Theresultofcomparisonandcalculationshowsthatthemolecularabsorberusing2perforatedtubeissuperiortoothertwostructuresinspeedfielddistributionandproductioncost,butitsevennessofgasflowdistributionissomewhatpoorerthatin20000m3/hairseparationplanthorizontalverticalgasflowmolecularabsorber.Keywords:Molecularabsorber;Horizontal;Verticalgasflow;Simulationofflowfield前言,,[1],,,[2],,,,,[3],56,[4],,,,,[5],,3[6]:;;,,,[7]20000m3/h,,,,,[8,9],,60000m3/h,,,20000m3/h3,,20000m3/h60000m3/h,:60000m3/h,,231分子筛吸附器工况及其数学模型60000m3/h,25~27m,42m;,;,,03721,3,,1,,31m3/h,059MPa,17,700kg/m3,1867010-5Pas03,,,:ux+vy+wz=0(1):uvwxyz3:xi(uiij)=-pxi+ijxj+gi+Si(2):;p;gi;;u;SiFLUENT:Si=-(3j=1Dijvj+3j=1Cij12vmagvj)(3)57(3),;DC;,,:Si=-(vi+C212vmagvi)(4):;C2;DC1/C2(4),:P=-(vi+C212vmagvi)n(5):P;nFLUENT,Ergun:|P|L=150D2p(1-)23v+175Dp(1-)3v2(6)=D2p1503(1-)2(7)C2=35Dp(1-)3(8):Dp;2阻力系数的确定037,Dp2mm[10],(7)(8)03410-8m2,C2217657m-1,,,(porousjump),,,,,,,2323,31~10m/s,016m/s,,(5)C245,P=3204v2-026v+013(5),Pv,026,P=3204v2,C2=30389m-1,P=29524v2+2838v-013,P=29524v2+2838v,C2=28038m-1,=210-8m245,,3模拟计算及结果分析,GAMBIT,,(),,,122,FLUENT,5845[11],,,RM,,,RM:R=vmax/v0(9)M=1S0S00(vy-v0v0)2dS(10):S0;vy;vmax;v0[12]1110,P0P10,MR,20000m3/h60000m3/h,1,1591P0P1P2P3P4P5P6P7P8P9P1020000m3/hS0/m2170175199181183184183182179175171M100920019001700270034003600340028001700150096vmax1/v1R11327105810201027103410341021102110131052136460000m3/hS0/m249745114522052925332544053155259516950464887M101350031002500350040004300400033002300310103vmax1/v1R1225611901054104110481048106811011073128416811,,60000m3/hMR20000m3/h,,299%156%,,,,60000m3/h,,60000m3/h,23,,360000m3/hMv0vmaxR,2,1232323P0P1P2P3P4P5P6P7P8P9P10S0/m249745114522052925332544053155259516950464887M101350031002500350040004300400033002300310103M200940029002300300037004000380030001900280100M300870029002300300037003900380030001800270099v1/(m/s)01560153014901470146014601460148015101550160v2/(m/s)01580153015001480147014701470149015201560160v3/(m/s)01570153014901470146014601470148015101550159vmax1/(m/s)03520182015701530153015301560163016201990269vmax2/(m/s)02220182015701530153015301530153016101990239vmax3/(m/s)02210182015601510151015101510152015901970234vmax1/v1R122561190105410411048104810681101107312841681vmax2/v2R214051190104710341041104110411027105912771494vmax3/v3R3140811901047102710341034102710271053127114722,60000m3/h23MR,R2R3R1,MR,2360,,,,23,,,,23M,M2M3R2R3,R2R3,R2R3,,M2M3M1132%152%,R2R3R186%91%,32,2378381Pa49831Pa44645Pa,3364%430%,,235结论20000m3/h60000m3/h,,,60000m3/hMR20000m3/h,,60000m3/h,60000m3/h,23,2364%,,MR,,132%86%,3,430%,MR152%91%,22,,:[1],.[J].,2003(4):1215.[2]CASTLEWFAirseparationandliquefaction:recentdevelopmentsandprospectsforthebeginningofthenewmillennium[J].InternationalJournalofRefrigeration,2002,25:158172.[3].[J].,2009(1)2225.[4]MARTINPD,SWANTONSWImprovedefficiencyofadsorptionprocesses[J].AppliedThermalEngineering,1997,17(810):869877.[5],,,.[J].,2007,26(11):16021609.[6],,.[J].,2005(5):1317.[7],.[J].,1992(2):1521.[8].,200610154688.4[P].[20080706].[9],,,.[J].,2010(5):1317.[10]13XHG/T26901995[S].1995.[11]BOLTONGT,HOOPERCW,MANNR,etalFlowdistributionandvelocitymeasurementinaradialflowfixedbedreactorusingelectricalresistancetomography[J].ChemicalEngineeringScience,2004,59:19891997.[12],,,.FLUENT[J].,2004,33(2):2527.61