| Chemical Engineering and Biochemical Engineering |
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| Numerical analysis of turbulence field and particle trajectory inside wet Electrostatic Precipitator |
| NING Zhi yuan, SHEN Xin jun, LI Shu ran, YAN Ke ping |
1. Industrial Ecology and Environment Research Institute, Zhejiang University, Hangzhou 310007, China;
2. School of Science, Shenyang University of Technology, Shenyang 110870, China |
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Abstract Finite element and multiphysics coupling methods were applied to visually analyze the flow pattern inside wet Electrostatic Precipitator (WESP). This work also obtained the trajectory of particle in different diameters and particle collection efficiency under various flow situations. Results suggest that, after high electric field was applied, the Electrohydrodynamic (EHD) flow has significant influence on primary flow, creating vortices before and after each discharge wire, especially when primary flow at a slow velocity. The moving wall function (to simulate the water flow inside WESP) makes inner flow pattern more complex and showing an obvious three-dimensional tendency. Meanwhile, the particle trajectory is also altered under given situation. Relatively, the trajectory of fine particles is more easily affected by altered primary flow.
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Published: 06 March 2017
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Cite this article:
NING Zhi yuan, SHEN Xin jun, LI Shu ran, YAN Ke ping. Numerical analysis of turbulence field and particle trajectory inside wet Electrostatic Precipitator. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(2): 384-392.
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湿式除尘器内部湍流场与粒子轨迹的数值分析
利用有限元多物理场耦合的方法,对湿式电除尘器内部的整体流场进行可视化分析,并指出耦合后流场对不同粒径颗粒运动轨迹以及收尘效率的影响.结果表明,在施加电场后,除尘器内的一次流在电流体（EHD）和壁面水膜流动的混合情况下产生了明显扰动.表现为在低流速的情况下,电晕线前后产生明显的涡旋.而在加入壁面水流的条件下,流场变得更加复杂,显现出明显的三维运动趋势.同时,流场的改变也使得颗粒物的运动轨迹变得复杂,相对来说,细颗粒物的运动轨迹更易受到流场变化的影响.
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