CFB锅炉可调效率的旋风分离器性能数值模拟研究Numerical simulation of the performance of cyclone separator with adjustable efficiency in CFB boiler
袁东辉;孙世超;郑秀平;韩义;王研凯;段伦博;
YUAN Donghui;SUN Shichao;ZHENG Xiuping;HAN Yi;WANG Yankai;DUAN Lunbo;Inner Mongolia Electric Power Research Institute Branch,Inner Monglia Electric Power (Group) Co.,Ltd.;Key Laboratory of Energy Thermal Conversion and Control,Ministry of Education,Southeast University;Inner Mongolia Jingtai Power Generation Co.,Ltd.;
摘要(Abstract):
在旋风分离器锥形筒斜面上距离锥形筒顶端50 cm处为中心点开孔,将分离器入口方向开孔命名为0°孔,俯视顺时针依次旋转90°,分别命名为90°孔、180°孔、270°孔。向上述开孔中通入干扰风能调整分离器效率,但通入干扰风对压降的影响未知。为了研究通入干扰风对旋风分离器整体性能(压降、分离效率、床温)的影响规律并得到最佳开孔方案,以某300 MWe循环流化床锅炉旋风分离器为对象,通过数值模拟研究分离效率可调的循环流化床锅炉旋风分离器压降变化特性。在不通入干扰风时模拟不同入口气速下的压降,并与压降经验模型计算结果进行比较,结果表明,压降随入口速度的增大而增大,且模拟结果与Chen-Shi模型计算结果吻合良好。模拟入口速度为7.48 m/s时,在0°、90°、180°、270°孔通入干扰风速分别为10、20、30 m/s时的压降,结果表明,在0°孔和90°孔中,压降随干扰风速的增大而减小;在180°孔和270°孔中,压降随干扰风速的增大先增大后减小。结合在不同孔通入干扰风时床温的变化规律,可认为90°孔的改造方案较好。
The holes are opened at the center point 50 cm away from the top of the conical cylinder on the inclined plane of the cyclone separator.The opening in the inlet direction of the cyclone separator is named as 0° hole which is rotated 90° clockwise from the inlet direction of the cyclone separator,and named as 90° hole,180° hole and 270° hole,respectively.The separator efficiency is adjusted by introducing interference wind into the opening of conical cylinder of cyclone separator,but the influence of the interference wind on the pressure drop of the cyclone separator is unkuown.In order to study the effect of the interference wind on the whole performance of the cycle including pressure drop,separation efficiency and bed temperature change,and get the best opening scheme,the pressure drop characteristics of a 300 MWe CFB cyclone with adjustable separation efficiency were studied by numerical simulation in this paper.Firstly,the pressure drop at different inlet velocities was simulated without interference wind,and the results were compared with the calculation results of empirical pressure drop model.The results show that the pressure drop increases with the increase of inlet velocity,and the simulation results are in good agreement with Chen-Shi model.Then the pressure drop is simulated when the inlet velocity is 7.48 m/s and the interference wind speed is 10,20 and 30 m/s at 0°,90°,180° and 270° holes,respectively.The results show that the pressure drop decreases with the increase of the interference wind speed in the 0° and 90° holes,and the pressure drop first increases and then decreases with the increase of the interference wind speed in the 180° and 270° holes.Combined with the variation of bed temperature when the interference wind is introduced into different holes,it can be considered that the 90° hole is a better reconstruction scheme.
关键词(KeyWords):
循环流化床(CFB);旋风分离器;CFD模拟;压降
circulating fluidized bed;cyclone separator;CFD simulation;pressure drop
基金项目(Foundation): 国家重点研发计划资助项目(2018YFB0605301)
作者(Author):
袁东辉;孙世超;郑秀平;韩义;王研凯;段伦博;
YUAN Donghui;SUN Shichao;ZHENG Xiuping;HAN Yi;WANG Yankai;DUAN Lunbo;Inner Mongolia Electric Power Research Institute Branch,Inner Monglia Electric Power (Group) Co.,Ltd.;Key Laboratory of Energy Thermal Conversion and Control,Ministry of Education,Southeast University;Inner Mongolia Jingtai Power Generation Co.,Ltd.;
Email:
DOI: 10.13226/j.issn.1006-6772.20061010
参考文献(References):
- [1]郑秀平,袁东辉,孙世超,等.循环流化床锅炉效率可调旋风分离器数值模拟与试验研究[J].热力发电,2020,49(5):132-139.ZHENG Xiuping,YUAN Donghui,SUN Shichao,et al.Numerical simulation and experimental study on efficiency adjustable cyclone separator of CFB boiler[J].Thermal Power Generation,2020,49(5):132-139.
- [2]SHEPHERD C B,LAPPLE C E.Flow pattern and pressure drop in cyclone dust collectors[J].Industrial and Engineering Chemistry,1939,31(8):972-984.
- [3]CASAL J,MARTINEZ M.Better way to calculate cyclone pressure drop[J].Chemical Engineering,1983,90(2):99-115.
- [4]DIRGO J.Relationships between cyclone dimensions and performance[D].Massachusetts:Harvard University,1988.
- [5]FIRSTM W.Cyclone dust collector design[M].New York:Am.Soc.Mech.Eng.,1949:49-127.
- [6]CHEN Jianyi,SHI Mingxian.A universal model to calculate cyclone pressure drop[J].Power Technology,2007,171:184-191.
- [7]杜慧娟,王川保,马红和,等.入口收缩角度对旋风分离器分离性能的影响[J].热力发电,2019,48(11):43-48.DU Huijuan,WANG Chuanbao,MA Honghe,et al.Influence of inlet necking angle on separation performance of cyclone separator[J].Thermal Power Generation,2019,48(11):43-48.
- [8]黄中,孙献斌,时正海,等.循环流化床锅炉旋风分离器数值模拟及改造[J].热力发电,2008,37(6):38-41.HUANG Zhong,SUN Xianbin,SHI Zhenghai,et al.Numerical simulation and modification of cyclone separator in CFB boiler[J].Thermal Power Generation,2008,37(6):38-41.
- [9]由洋,杨朝锋.循环旋风分离器的压降性能计算[J].测控技术,2018,37(S1):354-364.YOU Yang,YANG Chaofeng.Numeration of pressure drop in a recycling cyclone separator[J].Measurement and control technology,2018,37(S1):354-364.
- [10]张建,金有海.旋风分离器压力损失数值模拟研究[C]//第十一届全国计算机模拟与信息技术会议.宜昌:[S.N.],2007:12-14.ZHANG Jian,JIN Youhai.Numerical simulation of pressure loss in cyclone separator[C]//The 11th National Conference on computer simulation and information technology.Yichang[S.N.],2007:12-14.
- [11]李敏,贲伟,王维刚,等.旋风分离器压降数值分析[J].科学技术与工程,2010,10(10):2552-2555.LI Min,BEN Wei,WANG Weigang,et al.Numerical analysis of pressure drop in cyclone separator[J].Science Technology and Engineering,2010,10(10):2552-2555.
- [12]ASHRY E A,ABDELRAZEK A M,ELSHORBAGY K A.Numerical and experimental study on the effect of solid particle sphericity on cyclone pressure drop[J].Separation Science and Technology,2018.53(15):2500-2516.
- [13]马全.旋风分离器芯管结构改进试验研究[D].北京:中国石油大学,2004.MA Quan.Experimental study on the improvement of core tube structure of cyclone separator[D].Beijing:University of Petroleum,2004.
- [14]钱付平,章名耀.底部加直管旋风分离器的性能预测[J].热能动力工程,2005,20(1):43-46.QIAN Fuping,ZHANG Mingyao.Performance prediction for a cyclone separator with an added vertical pipe at its bottom[J].Journal of Engineering for Thermal Energy and Power,2005,20(1):43-46.
- [15]贾俊荣,刘枫.横截面形状对旋风分离器性能影响的数值模拟[J].工业安全与环保,2012(4):20-22.JIA Junrong,LIU Feng.Numerical simulation on performance of cyclone separator influenced by figure of cross section[J].Industrial Safety and Environmental Production,2012(4):20-22.
- [16]王海刚,刘石.不同湍流模型在旋风分离器三维数值模拟中的应用和比较[J].热能动力工程,2003,18(4):337-342.WANG Haigang,LIU Shi.Application and comparison of different turbulence models in the three-dimensional numerical simulation of cyclone separator[J].Journal of Engineering for Thermal Energy and Power,2003,18(4):337-342.
- [17]徐洋.带直管的旋风分离器的数值模拟和设计研究[D].成都:西南石油大学,2016:57.Xu Yang.Numerical simulation and design of cyclone separator with straight tube[D].Chengdu:Southwest Petroleum University,2016:57.
- [18]高助威,王娟,王江云,等.基于DPM模型的旋风分离器内颗粒浓度场模拟分析[J].石油学报(石油加工),2018,34(3):81-88.GAO Zhuwei,WANG Juan,WANG Jiangyun,et al.Influence factors of the natural cyclone length in cyclone separators[J].Acta Petrolei Sinica,2018,34(3):81-88.
- [19]吴克明,石碤,潘留明,等.旋风分离器压力损失的数学模型及在设计中的应用[J].化工环保,2005,25(2):156-159.WU Keming,SHI Ying,PAN Liuming,et al.Mathematical models for pressure drop in cyclone and their application in cyclone design[J].Environmental Protection of Chemical Industry,2005,25(2):156-159.
- [20]李战国.入口烟道布置方式对循环流化床锅炉旋风分离器性能影响的研究[D].北京:中国科学院工程热物理研究所,2009.LI Zhanguo.Study on influence of inlet duct layouts on cyclone performance in CFB boiler[D].Beijing:Institute of Engineering Thermophysics,Chinses Academy of Science,2009.
- [21]钱付平,章名耀.旋风分离器分离性能的经验模型与数值预测[J].东南大学学报(自然科学版),2005,35(1):35-39.QIAN Fuping,ZHANG Mingyao.Empirical model and numerical prediction for separation performance of cyclone separator[J].Journal of Southeast University(Natural Science Edition),2005,35(1):35-39.
- [22]蔡安江.旋风分离器设计计算的研究[J].化工矿物与加工,2003(8):21-23.CAI Anjiang.Study on design and calculation of cyclone separator[J].Industrial Minerals and Processing,2003(8):21-23.
- [23]李强.循环流化床锅炉旋风分离器气固两相流动特性及性能研究[D].上海:上海交通大学,2010.LI Qiang.Study on gas-solid two-phase flow characteristics and performance of cyclones in CFB Boilers[D].Shanghai:Shanghai Jiaotong University,2010.
- [24]颜勇,段伦博,段元强.燃料粒径调控匹配循环流化床富氧燃烧高氧浓度运行研究[J].动力工程学报,2019,39(9):693-699.YAN Yong,DUAN Lunbo,DUAN Yuanqiang.Study on adjustment of fuel particle size for oxy-fuel combustion with high O2concentration in a CFB boiler[J].Journal of Chinese Society of Power Engineering,2019,39(9):693-699.
- [25]周一工.循环流化床锅炉灰平衡和循环倍率计算方法探讨[J].锅炉技术,1998(4):3-5.ZHOU Yigong.Probe on calculating methods for ash balance and circulation rate of circulating fluidized bed boiler[J].Boiler Technology,1998(4):3-5.
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- 袁东辉
- 孙世超
- 郑秀平
- 韩义
- 王研凯
- 段伦博
YUAN Donghui- SUN Shichao
- ZHENG Xiuping
- HAN Yi
- WANG Yankai
- DUAN Lunbo
- Inner Mongolia Electric Power Research Institute Branch
- Inner Monglia Electric Power (Group) Co.
- Ltd.
- Key Laboratory of Energy Thermal Conversion and Control
- Ministry of Education
- Southeast University
- Inner Mongolia Jingtai Power Generation Co.
- Ltd.
- 袁东辉
- 孙世超
- 郑秀平
- 韩义
- 王研凯
- 段伦博
YUAN Donghui- SUN Shichao
- ZHENG Xiuping
- HAN Yi
- WANG Yankai
- DUAN Lunbo
- Inner Mongolia Electric Power Research Institute Branch
- Inner Monglia Electric Power (Group) Co.
- Ltd.
- Key Laboratory of Energy Thermal Conversion and Control
- Ministry of Education
- Southeast University
- Inner Mongolia Jingtai Power Generation Co.
- Ltd.