Impact of Bed Inventory and Air Distributor Resistance on Bed Overturn in Circulating Fluidized Bed with Pant-legs

Impact of Bed Inventory and Air Distributor Resistance on Bed Overturn in Circulating Fluidized Bed with Pant-legs

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时间:2019-07-16

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1、第34卷第1期动力工程学报Vol.34No.12014年1月JournalofChineseSocietyofPowerEngineeringJan.2014文章编号:1674-7607(2014)01-0007-06中图分类号:TK229文献标志码:A学科分类号:470.30物料量及布风板阻力对裤衩腿流化床锅炉翻床的影响吴海航1,孙纪宁2,王哲1,李政1,倪维斗1,雷秀坚3,邝伟3(1.清华大学热能工程系,电力系统及发电设备控制和仿真国家重点实验室,北京100084;2.北京航空航天大学能源与动力工程学院,航空发动机气动热力国防科技重点实验室,北京100191;

2、3.四川白马循环流化床示范电站有限责任公司,内江641005)摘要:基于颗粒动力学两相流方法,建立了裤衩腿循环流化床锅炉二维CFD数值计算模型,研究了总物料量和布风板阻力特性对翻床趋势的影响.结果表明:炉膛总物料量越大,平均物料交换率越大,越容易翻床;布风板阻力系数越大,平均物料交换率越小,越不容易翻床;正负反馈机理可以合理解释物料量和布风板阻力特性对翻床的影响;布风板压降和物料压降比是评价裤衩腿循环流化床锅炉自平衡能力的重要参数.关键词:裤衩腿循环流化床锅炉;布风板;物料量;翻床ImpactsofBedInventoryandAirDistributorResi

3、stanceonBedOverturninCirculatingFluidizedBedwithPant-legs1,SUNJining2,WANGZhe1,LIZheng1,NIWeidou1,WUHaihang3,KUANGWei3LEIXiujian(1.StateKeyLabofControlandSimulationofPowerSystemsandGenerationEquipment,DepartmentofThermalEngineering,TsinghuaUniversity,Beijing100084,China;2.NationalKeyL

4、abofDefense-relatedScienceandTechnologyonAero-Engines,SchoolofEnergyandPowerEngineering,BeihangUniversity,Beijing100191,China;3.SichuanBaimaCFBDemonstrationPowerPlantCo.,Ltd.,Neijiang641005,China)Abstract:Basedontwo-phaseflowgranulardynamics,atwo-dimensionalCFDnumericalmodelwasdevel-o

5、pedtoinvestigatetheimpactsofbedinventoryandairdistributorresistanceonthebedinventoryoverturnprocessincirculatingfluidizedbedwithpant-legs.Resultsshowthatwiththeriseofbedinventory,thelateralsolidflowraterises,resultinginincreasedpossibilityofbedinventoryoverturn;whereaswiththeriseofair

6、distributorresistancecoefficient,thelateralsolidflowratedrops,resultinginreducedpossibili-tyofbedinventoryoverturn.Thesephenomenacanbeexplainedbythemechanismofpositiveandnegativefeedback.Thepressuredropratioofairdistributorandbedinventorymayserveasanimportantparametertoevaluatetheself

7、-balanceabilityoffurnacewithpant-legs.Keywords:CFBboilerwithpant-legs;airdistributor;bedinventory;bedinventoryoverturn收稿日期:2013-01-21修订日期:2013-03-22基金项目:973基础研究计划资助项目(2010CB227006)作者简介:吴海航(1988-),男,浙江金华人,硕士研究生,主要从事超临界循环流化床建模方面的研究.孙纪宁(通信作者),男,讲师,博士,电话(Tel.):010-82317697;E-mail:sunjinin

8、g@bua

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