垂直冷却水管内液固两相流的传热与抗垢性能张琳

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Heattransferandanti-foulingofliquid-solidtwo-phaseflowinverticalcoolingwaterpipesZhangLin,BuQingxuan,YouYikuang(KeyLaboratoryofOil&GasStorageandTransportationTechnology,CollegeofMechanicalandEnergyEngineering,JiangsuPolytechnicUniversity,Changzhou213016,China),,(,213016)[],,。。,,,,,。[];;;[]X703.1[]B[]1005-829X(2009)09-0022-04Abstract:Tosolvethehardproblemthatthereductionofheattransferefficiencyonthecoolingstaveofblastfurnaceduetofoulingdeposition,solidparticleshavebeenaddedintothecoolingwaterpipes,formingliquid-solidtwo-phaseflow,whichcanchangetheheattransferandanti-foulingcapacitiesofthecoolingwaterpipes.Underdifferentsolidphasevolumescores,theheattransferandanti-foulingcapacitiesoftheliquid-solidtwo-phaseflowinthecoolingwa-terpipesarestudied.Theresultsindicatesthatbecauseoftheperturbationandshearingeffectofsolidphaseparti-cles,notonlycantheheattransfercoefficientandheattransfercapacityofthecoolingwaterpipesbeenhanced,buttheanti-foulingcapacitybeincreased.Thusthehighlyeffectiverunningtimeoftheequipmentisgreatlyextended,realizingthelong-termhighlyeffectiverunningofthecoolingstaves.Keywords:coolingstave;liquid-solidtwo-phasefluid;heattransferenhancement;anti-foulingcapacity[](06KJB530046);(ZMF07020016)29920099IndustrialWaterTreatmentVol.29No.9Sep.,2009,。,〔1〕、〔2-4〕、〔5-6〕、〔1〕。,。、“”,。,。,。1,。1。:D34mm×2mm×1000mm,D48mm×3mm×1000mm。(100±5)℃,;、。,。22——2009-09,29(9)2,。2mm,。,,,,;,,,,,,。,。,,,。,,,。,,。3。3.12500~4500L/h。。(1)、(2)。:Q=mhfg(1):Q=KAi△tm(2):K———,W/(m2·K);△tm———,K;m———,kg;hfg———,J/g;Q———,W;Ai———,m2。2。2:,,,,;,,,。3.2CaCO3,CaCO3,。CaCO3,,,。,L12(31×21),2(1.5、2.3m/s),3(2%、6%、8%),6。(3)。R=1Kt=doαidi+δdoλdm+1αo+Rti+Rto(3):Rti、Rto———、,,:23——2009-09,29(9),Rto;Kt———,W/(m2·K);do、di、dm———、,mm;δ———,mm;λ———,W/(m2·K);αo、αi———、,W/(m2·K)。,Rti=0,1Kt=0=1K0=doαidi+δdoλdm+1αo(4)(3)、(4),:Rti=1Kt-1K0(5)31.5m/s。3:1.5m/s,,,,。,,,。2%6%,。6%。,,,,,;,;,。42.3m/s。4:2.3m/s,。,8%,,,,,,,。。,,。,,,dRf/dtΦdΦr,Ker-Seaton-〔7〕:dRfdt=Φd-Φr(6),,,,,。4(1),,,,;,、,,。(2)3m/s10%,,。[][1],,,.[J].,2006,41(6):13-16.[2],,,.[J].,2006,18(7):6-9.[3],,.[J].24——ResearchontheharmlesssynthesisofhydrolyzedpolymaleicanhydridecontainingphosphineMeiChaoqun1,FanYongming1,ZhangHongli2,BianWei3,DongYaohui1(1.SchoolofMaterialScienceandTechnology,BeijingForestryUniversity,Beijing100083,China;2.DepartmentofChemistry&ChemicalEngineering,WeinanNormalUniversity,Weinan714000,China;3.CollegeofPowerandEnergy,NorthwesternPolytechnicUniversity,Xi’an710072,China)1,1,2,3,1(1.,100083;2.,714000;3.,710072)[],30%,,(PHPMA)。,:m(MA)∶m(NaH2PO2·H2O)=9∶3,V(H2O)∶V(H2O2)=11∶9,95℃,3.0h。,3%,,0.5mg/L,97.96%,83.47%。[];;[]TQ085+.412[]A[]1005-829X(2009)09-0025-03Abstract:Theoptimumconditionsofsynthesizinghydrolyzedpolymaleicanhydride(PHPMA)containingphosphinehavebeenexplored,byusingwaterasaqueoussolutionwith30%ofhydrogenperoxideasinitiatorbytheactionofcatalyst.Theexperimentalresultsshowthattheoptimumconditionsareasfollows:m(MA):m(NaH2PO2·H2O)=9∶3,V(H2O)∶V(H2O2)=11∶9,thereactiontemperatureis95℃,thetimeofreactionis3.0h,thePHPMAisstablerthanHPMAandtheamountofphosphineinPHPMAislowerthan3%.Itwillnotpollutethewaterbody,whentheaddingamountoftheobtainedproductis0.5mg/L,theantiscalingratereaches97.96%,andthecorrosioninhibitionratereaches83.47%.Keywords:hydrolyzedpolymaleicanhydridecontainingphosphine;antiscaling;corrosioninhibition[](2006-55)(HPMA),,,,。C—P(—PO2H2),,〔1〕。(MA)、(H2O2)、(NaH2PO2·H2O),,(),(<3%)。、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、29920099IndustrialWaterTreatmentVol.29No.9Sep.,2009,2006,18(5):10-13.[4],,,.[J].,2007,56(8):856-859.[5],,,.[J].,1999,34():272-274.[6],,,.[J].,2003,38(1):8-12.[7]SomerscaleEFC,KnudsenJG.FoulingofHeatTransferEquipment[M].Washington:Hemisphere,1978:235-244.[](1969—),,。:,:13915085982,E-mail:z3281315@yeah.net。[]2009-05-15()25——

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