络合铁法脱硫反应器锥段硫磺沉降的数值模拟.pdf

《络合铁法脱硫反应器锥段硫磺沉降的数值模拟.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、石油与天然气化工１０CHEMICALENGINEERINGOFOIL&GAS２０１６络合铁法脱硫反应器锥段硫磺沉降的数值模拟１１２２２２张楠陈建华宋彬李映年吴宇刘蔷１．中国科学院过程工程研究所多相复杂系统国家重点实验室２．中国石油西南油气田公司天然气研究院摘要络合铁法脱硫工艺在天然气行业应用广泛，将反应生成的硫磺富集回收是反应器稳定运行的关键之一。在反应器底部引入锥段对硫磺的富集、沉降和回收很有帮助，为了避免硫磺在锥段侧壁长期沉积和结块，应分层通入扰动气体。通入气量不能太小，以免达不到避免锥段侧壁硫磺沉积的作用；但也不能太大，否则会使得硫磺难于沉降。本研究采用欧拉

2、多流体模型，对锥段硫磺沉降进行了模拟，研究了硫磺浓度和通气速度对硫磺沉降的影响。结果表明：硫磺浓度对沉降速度影响较小，而通气速度对沉降影响明显。随着气速的增大，硫浆沉降越来越慢，对所研究的体系而言，最大通气速度应小于０．７５m／s。关键词气液固三相流计算流体力学欧拉多流体模型络合铁脱硫硫磺沉降中图分类号：TE６４４；TQ０１５．９；TP３９１．９；O６‐３９文献标志码：ADOI：１０．３９６９／j．issn．１００７‐３４２６．２０１６．０６．００３Numericalsimulationofsulfurdepositionintheconesectionofche

3、latedirondesulphurizationreactor112222ZhangNan，ChenJianhua，SongBin，LiYingnian，WuYu，LiuQiang（１．StateKeyLaboratoryofMultiphaseComplexSystems，InstituteofProcessEngineering，ChineseAcademyofSciences，Beijing１００１９０，China；２．ResearchInstituteofNaturalGasTechnologyofPetroChinaSouthwestOil&Gasfi

4、eldCompany，Chengdu６１０２１３，China）Abstract：Chelatedirondesulfurizationprocessiswidelyusedinnaturalgasindustry，theenrichmentandremovalofsulfurparticlesisakeyfactorforstableoperationofthereactor．Thedesignofaconesectionatthebottomofthereactorishelpfulfortheenrichment，settlementandrecoveryof

5、sulfurparticles．Inordertoavoidlong‐termdepositionandagglomerationofsulfurparticlesatthesidewalloftheconesection，thedisturbedgasshouldbeinjectedatdifferentheights．Theflowrateofthedisturbedairshouldnotbetoosmall，soastoavoidsulfurdepositionatthesidewalloftheconesection．Itshouldalsonotbet

6、oolarge，soastopreventthesettlementdifficultyofthesulfurparticles．Eulerianmultiphasemodelwasusedtosimulatesulfurdepositionintheconesection．Theeffectsofsulfurconcentrationandairflowvelocityonsulfurdepositionwerestudied．Theresultsshowedthatsulfurconcentrationhadlittleinfluenceonthesettli

7、ngvelocity，whiletheeffectofairflowvelocityonthesettlementwasobvious．Thedepositionrateofsulfurparticledecreasedwiththeincreasingofgasvelocity，themaximumairflowvelocityofthesystemshouldbelessthan０．７５m／stoensurethesettlementofthesulfurparticles．Keywords：gas‐liquid‐solidthreephaseflow，com

8、putat