循环流化床烟气脱硫塔进口流场模拟及优化.pdf

第39卷第1期中国矿业大学学报Vol.39No.1
2010年1月JournalofChinaUniversityofMining&TechnologyJan.2010

循环流化床烟气脱硫塔进口流场模拟及优化

宫国卓1,2,叶树峰1,陈运法1,解强3
(1.中国科学院过程工程研究所多相反应国家重点实验室,北京100190;
2.中国科学院研究生院,北京100049;3.中国矿业大学化学与环境工程学院,北京100083)

摘要:为了改进循环流化床脱硫塔因下部装有的弯管加文丘里管式入口结构所造成的底部区域
不均匀气流场,采用RNGκ2ε湍流模型对脱硫塔的气流场进行了模拟计算,讨论了这种进口结
构对脱硫塔流场的影响机理,并对该进口结构进行了优化.结果表明:RNGκ2ε模型对于该流场
具有较好的模拟效果,在弯管和文丘里管综合作用下,脱硫塔内中下部的气流场分布不均,而返
料口对脱硫塔的气流场影响很小.通过对比3种入口结构的优化方式,发现采用改进导流叶片的
方式优化效果较好,可成功均布脱硫塔气流场,造成的床层压损也很小.
关键词:数值模拟;RNGκ2ε湍流模型;进口结构;优化
中图分类号:TQ05111文献标识码:A文章编号:100021964(2010)0120104205
CharacterizationandModificationof
InletConfigurationonGasFlowina
CirculatingFluidizedBedDesulfurizationReactor

GONGGuo2zhuo1,2,YEShu2feng1,CHENYun2fa1,XIEQiang3
(1.StateKeyLaboratoryofMulti2phaseComplexSystem,InstituteofProcessEngineering,
ChineseAcademyofSciences,Beijing100190,China;
2.GraduateUniversityofChineseAcademyofSciences,Beijing100049,China;3.SchoolofChemicaland
EnvironmentalEngineering,ChinaUniversityofMining&Technology,Beijing100083,China)

Abstract:Inordertoimprovethegasflowfieldinthebottomregionofacirculatingfluidized
beddesulfurizationreactorwithnonuniformitygeneratedbyitsinletconfigurationwhichcon2
sistedofbendpipeandventuritube,anumericalsimulationforgasflowfieldofdesulfurization
reactorwasperformedusingaRNGκ2εturbulentmodel.Theinfluencemechanismofinletcon2
figurationongasflowfieldinthedesulfurizationtowerwasdiscussed,andsomeattemptswere
alsoperformedtooptimizecurrentinletconfiguration.TheresultsshowthattheRNGκ2εtur2
bulentmodelcansimulatetheturbulentflowofinletconfigurationwell.Duetobendpipeand
venturitube,thegasflowfieldinthedesulfurizationtowerisbadlyaffectedbycurrentinlet
configuration,whilethecirculatingfeedinletaffectslittleonit.Amongthreemodification
methods,modifiedguidevanesisfoundtosuccessfullyoptimizethegasflowprofilesinthe
desulfurizationtowerwellwhilethebedpressuredropcausedbyitissmall.
Keywords:numericalsimulation;RNGκ2εturbulentmodel;inletconfiguration;modification

收稿日期:2009205228
基金项目:国家自然科学基金项目(5