化学化工专业英语翻译reactortypes

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1、Unit4ReactionEngineeringLesson12ReactorTypes1・StirredtankreactorAbatchstirredtankreactoristhesimplesttypeofreactor.ltiscomposedofareactorandamixersuchasastirrer,aturbinewingorapropeller.Thebatchstirredtankreactorisillustratedbelow:Thisreactorisusefulfor

2、substratesolutionsofhighviscosityandforimmobilizedenzymeswithrelativelylowactivity.However,aproblemthatarisesisthatanimmobilizedenzymetendstodecomposeuponphysicalstirring.Thebatchsystemisgenerallysuitablefortheproductionofrathersmallamountsofchemicals.A

3、continuousstirredtankreactorisshownabove:Thecontinuousstirredtankreactorismoreefficientthanabatchstirredtankreactorbutthe?equipmentisslightlymorecomplicated.2.TubularReactorTubularreactorsaregenerallyusedforgaseousreactions,butarealsosuitableforsomeliqu

4、id-phasereactions.Ifhighheat-transferratesarerequired,small-diametertubesareusedtoincreasethesurfaceareatovolumeratio.Severaltubesmaybearrangedinparallel,connectedtoamanifoldorfittedintoatubesheetinasimilararrangementtoashellandtubeheatexchanger.Forhigh

5、-temperaturereactionsthetubesmaybearrangedinafurnace・3・FluidizedbedReactorAfluidizedbedreactor(FBR)isatypeofreactordevicethatcanbeusedtocarryoutavarietyofmultiphasechemicalreactions・Inthistypeofreactor,afluid(gasorliquid)ispassedthroughagranularsolidmat

6、erial(usuallyacatalystpossiblyshapedastinyspheres)athighenoughvelocitiestosuspendthesolidandcauseittobehaveasthoughitwereafluid.Thisprocess,knownasfluidization,impartsmanyimportantadvantagestotheFBR.Asaresult,thefluidizedbedreactorisnowusedinmanyindustr

7、ialapplications.(1)BasicprinciplesThesolidsubstrate(thecatalyticmaterialuponwhichchemicalspeciesreact)materialinthefluidizedbedreactoristypicallysupportedbyaporousplate,knownasadistributor.Thefluidisthenforcedthroughthedistributorupthroughthesolidmateri

8、al.Atlowerfluidvelocities,thesolidsremaininplaceasthefluidpassesthroughthevoidsinthematerial.Thisisknownasapackedbedreactor・Asthefluidvelocityisincreased,thereactorwillreachastagewheretheforceofthefluidonthesolidsisenoughtobalanc