脱硫塔除雾器安装高度对烟气携液量影响的模拟研究  

Simulation Study on Influence of Installation Height of Mist Eliminator on Liquid Holdup of Flue Gas in Desulfurization Tower

作　　者：张双平[1,2] 陈伟雄[2] 贾西部[1] 袁园 ZHANG Shuangping;CHEN Weixiong;JIA Xibu;YUAN Yuan(Datang Northwest Electric Power Test&Research Institute,Xi’an 710021,Shaanxi Province,China;State Key Laboratory of Multiphase Flow in Power Engineering(Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China)

机构地区：[1]大唐西北电力试验研究院,陕西省西安市710021 [2]动力工程多相流国家重点实验室(西安交通大学),陕西省西安市710049

出　　处：《发电技术》2021年第2期247-253,共7页Power Generation Technology

基　　金：国家重点研发计划项目(2018YFB0604303)。

摘　　要：某电厂运行过程中存在周期性的除雾器阻力上升和结垢现象,造成除雾器局部坍塌。为解决这一问题,通过数值模拟方法对脱硫塔内部气液两相流场进行模拟,研究除雾器距离喷淋层高度(2.0~3.5 m)和喷淋雾化粒径(1500~2500μm)等因素下,除雾器最下沿烟气携带喷淋液滴的情况。计算结果表明:随着除雾器距离喷淋层高度的增加,脱硫塔内部流场更趋均匀化,喷淋液滴到达除雾器的质量浓度相应降低。通过数值模拟得出了量化数据,从而为存在除雾器堵塞坍塌等类似现象的国内燃煤电厂提供诊断思路和优化依据。During the operation of a power plant,there is a periodic phenomenon of mist eliminator resistance rising and scaling,which results in the partial collapse of the mist eliminator.In order to solve this problem,the gas-liquid two-phase flow field in the desulfurization tower was simulated by numerical simulation method,and the condition of flue gas carrying spray droplets at the bottom of the mist eliminator was further studied,as affected by the varying heights(2.0-3.5 m)from the top spray layer center to the bottom and the different misting drop sizes(1500-2500mm)of the particular nozzles.The results show that with the increase of the distance from the mist eliminator to the spray layer,the mass concentration of spray drops decreases,and the flow field inside the desulphurization tower becomes more uniform.The quantitative data were obtained by numerical simulation,which can provide a diagnostic thought and optimization basis for domestic coal-fired power plants with similar phenomena such as mist eliminator blocking and collapsing.

关 键 词：脱硫塔 流场模拟 除雾器 喷淋层 

分 类 号：TK09[动力工程及工程热物理]