梯形折流板除雾器在电镀铬铬雾回收系统中的数值模拟
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摘要
本研究利用计算流体力学方法对铬雾回收系统中的梯形折流板除雾器内气液两相流进行数值仿真。通过分析得到梯形折流板除雾器叶片间距、流速、弯折角度、长度、高度以及道数等对不同粒径铬雾雾滴的去除效率的影响,得到了不同粒径铬雾雾滴的捕集规律、速度分布规律以及进出口压力差变化规律。分析结果表明,粒径在10μm以下的铬酸雾液滴,惯性力小,去除效率较低,不易被捕集。粒径在10μm以上的铬酸雾液滴,去除效率较高。
The research employs the method of computational fluid dynamics(CFD)to do a numerical simulation of two phase flow of gas and liquid in trapezoidal baffle demister used in the recycling system of chromium plating mist droplets.Through the analysis,the research finds out that the blade-spacing,gas-velocity and bending-angle,length,height,bending of a trapezoidal baffle demister influence the removal efficiency of different size chromium plating mist droplets,the capture rule of chromium plating mist droplets in different size and different velocity,meanwhile the inlet and outlet pressure.The analysis results show that:The chromium plating mist droplets(particle size<10μm)own small inertia force.The removal efficiency is quite low.The droplets are captured difficultly.For the chromium plating mist droplets(particle size>10μm),the removal efficiency is higher than small.
The research employs the method of computational fluid dynamics(CFD)to do a numerical simulation of two phase flow of gas and liquid in trapezoidal baffle demister used in the recycling system of chromium plating mist droplets.Through the analysis,the research finds out that the blade-spacing,gas-velocity and bending-angle,length,height,bending of a trapezoidal baffle demister influence the removal efficiency of different size chromium plating mist droplets,the capture rule of chromium plating mist droplets in different size and different velocity,meanwhile the inlet and outlet pressure.The analysis results show that:The chromium plating mist droplets(particle size<10μm)own small inertia force.The removal efficiency is quite low.The droplets are captured difficultly.For the chromium plating mist droplets(particle size>10μm),the removal efficiency is higher than small.
引文
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[2]刘伟军,陈拴住,张书华.荷电器内煤粉荷电颗粒运动轨迹仿真[J].煤炭转化,2009,32(3):60-64.(Liu Wei-jun,Chen Shuan-zhu,Zhang Shu-hua.The simulation of the particles trajectory in the electruc charged device[J].Coal Coversion,2009,32(3):60-64.)
[3]郝雅洁,刘嘉宇,袁竹林.除雾器内雾滴运动特性与除雾效率[J].化工学报,2014(12):65.(Hao Ya-jie,Liu Jia-yu,Yuan Zhu-lin.Movement characteristics of droplets and demisting efficiency of mist eliminator[J].Journal of Chemical Industry and Engineering,2014(12):65.)
[4]杨飏.烟气脱硫净化工程技术与设备[M].北京:化学工业出版社,2013(1).(Yang Yang.Purifying the flue gas desulfurization technology and equipment[M].Beijing:Chemical Industry Press,2013(1).)
[5]焦保良,胡朝.折流板式除雾器性能数值模拟[J].产业与科技论坛,2015,14(4):42-44.(Jiao Bao-liang,Hu Chao.Numerical simulation of baffle demister[J].Industrial and Science Tribune,2015,14(4):42-44.)
[6]王亮,付海明,朱辉.基于DPM法单纤维捕集效率的CFD模拟[J].建筑热能通风空调,2015,34(1):49-51.(Wang Liang,Fu Hai-ming,Zhu Hui.Simulation of collection efficiency on single fiber surface based on DPM[J].Building Energy and Environment,2015,34(1):49-51.)
[7]Skodras G,Kaidis S P,Sofialidis D.Particle removal via electrostatic precipitator:CFD simulation[J].Fuel Processing Technology,2006,87(7):623-631.
[8]Saiyasitpanich P,Keener T C,Khang S J.Removal of diesel particulate matter(DPM)in a tubular wet electrostatic precipitator[J].Journal of Electrostatics,2007,65(10):618-624.