除雾器内二次携带液滴的数值模拟
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摘要
采用数值模拟的方法,利用FLUENT软件分别对除雾器内二次携带液滴的来源与加装不同钩片对除雾器内二次携带液滴的影响进行了分析。结果表明:二次携带的液滴主要来源于液膜的剥落和分离;加装双钩片能有效改善二次携带液滴的现象。
The main source of re-entrained droplets in a demister was numerically analyzed using FLUENT software,while the effectiveness of the treatment measures by installing different hooks in the demister was studied.Results show that the re-entrained droplets are mainly produced in the stripping and separation of liquid film,and the installation of double hooks can effectively inhibit the re-entrainment phenomenon.
The main source of re-entrained droplets in a demister was numerically analyzed using FLUENT software,while the effectiveness of the treatment measures by installing different hooks in the demister was studied.Results show that the re-entrained droplets are mainly produced in the stripping and separation of liquid film,and the installation of double hooks can effectively inhibit the re-entrainment phenomenon.
引文
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[2]孙志春,郭永红,肖海平,等.鼓泡脱硫塔除雾器除雾特性数值研究及实验验证[J].中国电机工程学报,2010,30(8):68-75.
[3]洪文鹏,雷鉴琦.加装钩片对除雾器性能影响的数值研究[J].动力工程学报,2016,36(1):59-64.
[4]姚杰,仲兆平,周山明.湿法烟气脱硫带钩波纹板除雾器结构优化数值模拟[J].中国电机工程学报,2010,30(14):61-67.
[5]樊水冲,杨学忠,郭勇.波纹板除雾器流场与效率的数值计算[J].炼油与化工,2006,17(2):5-10.
[6]杨雪龙,王永,冯靖,等.单钩波形板分离器内二次携带机理分析[J].原子能科学技术,2016,50(5):805-811.
[7]高彦栋,王晓墨,黄素逸.用液滴碰壁模型对波形板汽水分离器的模拟[J].华中科技大学学报(自然科学版),2000,30(2):48-50.
[8]CROWE C T,GORE R A,TROUTT T R.Particle dispersion by coherent structures in free shear flows[J].Particulate Science and Technology,1985,3(3-4):149-158.
[9]NAKAO T,NAGASE M,AOYAMA G,et al.Development of simplified wave-type vane in BWR steam dryer and assessment of vane droplet removal characteristics[J].Journal of Nuclear Science and Technology,1999,36(5):424-432.
[10]OWEN I,RYLEY D J.The flow of thin liquid films around corners[J].International Journal of Multiphase Flow,1985,11(1):51-62.
[11]黄新长.脱硫除雾器性能实验研究与优化设计[D].北京:华北电力大学,2010.
[12]杨治中,郭士义.火电厂石灰石-石膏湿法脱硫除雾器的研究及应用进展[J].能源环境保护,2014,28(6):11-14,6.
[13]郝雅洁,刘嘉宇,袁竹林,等.除雾器内雾滴运动特性与除雾效率[J].化工学报,2014,65(12):4669-4677.