攪拌槽內(nèi)微觀混合特性與離集指數(shù)的無因次關(guān)聯(lián).pdf

1、（類別:全日制碩士研究生題目：攪拌槽內(nèi)微觀混合特性與離集指數(shù)的無因次關(guān)聯(lián)英文題目：類別:全日制碩士研究生題目：攪拌槽內(nèi)微觀混合特性與離集指數(shù)的無因次關(guān)聯(lián)英文題目：MicromixingCharacteristicsandDimensionlessCorrelationfortheSegregationIndexinaStirredtank研究生：梁宏波學(xué)科名稱：化學(xué)工程指導(dǎo)教師：劉進(jìn)榮教授研究生：梁宏波學(xué)科名稱：化學(xué)工程指導(dǎo)教師：劉進(jìn)榮

2、教授二○一○年六月二○一○年六月碩士學(xué)位論文碩士學(xué)位論文分類號(hào):學(xué)校代碼:10128UDC:學(xué)號(hào):20071138分類號(hào):學(xué)校代碼:10128UDC:學(xué)號(hào):20071138AbstractInfluencesofmicromixingonparticlesizeparticlesizedistributionmphologyofcrystallswereinvestigated.Segregationindexwasacterizati

3、onbyconditionsofoperatingwhichparticlesizeparticlesizedistributionofcrystalswereprovidedfthebasis.Inthispaperefficiencyofmicromixingwasresearchedbychangingfeedingtimefeedingpositionstirringspeedreactantconcentrationvisco

4、sityvolumeratiomasstransfercoefficientdiffusioncoefficientwherethesegregationindexwascrelationedbydimensionanalysis.Themainwkwassummaritedasfollows:Influencesofmicromixingonthereactionofcrystallizationwereresearched.Para

5、llelcompetingreationsystemofBa(OH)2NaHSO4CLCH2COOC2H5isedastheresearchsystemwithstirredtankascrystallizer.Theefficiencyofmicromixingisvaluedbytheyieldofethanol.Toinvestigattingtheinfluenceofreactionconditionsontheefficie

6、ncyofmicromixingwhichaffectenthemicromixingwereknownbysinglefactexperimentaltheeticalanalysis.Themainparametersofthemodelwerestirringspeedreactantconcentrationfeedingpositionviscositymasstransfercoefficientdiffusioncoeff

7、icient.Usingdimensionalanalysis(RayleighLawBuckinghamLaw)dimensionlessnumberwerededucedfromconditionsofoperatingsegregationindexasfollows:()()()defSXCScPeSh=ParameterofmodelofXswasobtainedbyusingmultiplelinearregressionc

8、relationcoefficient(R2)was0.9937.Therelatedaverageerrofexperimentalvaluecalculatedvaluewaslessthan18%.Theresultsindicatedthatexperimentalvaluecalculatedvaluewasconsistented.Fromtheequationwecangetthecrystalsizecrystalsiz

9、edistributionofproductsdeterminetherangeofdimensionless.BasedontheabovewkparticlesizeitsdistributionofBaSO4wasacterizedbyparticlesizeanalyzerstransmissionelectronmicroscopy(TEM).Theresultsindicatedthatsizedistributionwer

10、eeffectedbyReScSh.Re≥3800proptionofmiansizeBaSO4(223nm)wasmethan77%ultrafineparticlesofnarrowsizedistributionwasobtained.SegregationindexwasincreasedfollowsScincrease.2800≤Sc≤3500mainsizeofBaSO4(223nm)distributionwasrang