三相气升式环流反应器内上升区相含率轴向分布与循环液速的研究.pdf

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1、第35卷第2期2014年4月化学工业与工程技术JournalofChemicalIndustry&EngineeringV01．35No．2Apr．，2014三相气升式环流反应器内上升区相含率轴向分布与循环液速的研究木赵楠，稽从杰，刘永民”(辽宁石油化工大学石油化工学院，辽宁抚顺113001)摘要：常温常压下，在三相气升式内环流反应器中，将硅铝球、石英砂和瓷球分别与空气、水组成三相物系，考察了细颗粒与大颗粒物系中上升区相含率轴向分布规律、固体装载率和颗粒粒径对该规律的影响，以及各物系中上升区循环液速随表观气速的变化规律。

2、结果表明：随轴向高度的增加，瓷球物系中上升区固含率占。，先增大后减小；硅铝球物系中占。，减小；石英砂物系中占。，均匀分布。随轴向高度的增加，瓷球物系中上升区气含率占。增大；硅铝球物系中占。减小；石英砂物系中占。先增大后减小。固定表观气速，各轴向位置处的上升区气含率随固体装载率、颗粒粒径的增大而增大。当固体装载率相同时，各物系中上升区循环液速随表观气速的增大而增大。关键词：三相气升式内环流反应器相含率轴向分布上升区循环液速中图分类号：TQ052文献标识码：A文章编号：1006-7906(2014)02-0036-05Stu

3、dyonaxialdistributionofphaseholdupsandliquidrecirculationvelocityinthree--phaseinternal··loopairliftreactorZHAONan，JlCon97ie，LIUYongmin(CollegeofPetrochemicalEngineering，LiaoningShihuaUniversity，Fushun113001，China)Abstract：UsingSi·A1spherules，quartzsandandporcela

4、inspherulesrespectivelytoformthree-phasesystemswithairandwaterinthethree·phaseinternal-loopaidiftreactorundernormaltemperatureandatmosphere，theregularitiesoftheaxialdistributionofphaseholdupsinriserforfineparticlesandlargeparticlessystems，andtheeffectsofsolidconc

5、entrationandparticlesizeonthisregu—larity，andthechangeruleofliquidrecirculationvelocityfollowthesuperficialgasvelocityindifferentsystemsinriserareinvestigated．Theresultsshowthatwiththeincreaseoftheaxialheight，thesolidholdupinriserforporcelainspherulessystemfirstl

6、yincreasedandthendecreased，anditforSi—A1spherulessystemisdecreased，anditforquartzsandsystemisuniform．Withtheincreaseoftheaxialheight，thegasholdupinriserforporcelainspherulessystemisincreased，anditforSi—A1spherulessystemisdecreased，anditforquartzsandsystemisfirstl

7、yincreasedandthendecreased．Atafixedsuperficialgasvelocity，solidholdupinriserateveryaxialheightisincreasedwiththeincreaseofsolidconcentrationandparticlesize．Whenthesolidconcentrationisidentical，theliquidrecirculationvelocityinriserisincreasedfollowtheincreaseofsup

8、erficialgasvelocityindifferentsystems．Keywords：three·phaseinternal—loopairliftreactor；axialdistributionofphaseholdups；liquidrecirculationvelocityinriser气液固三相气升