等离子体焊接除尘装置设计与数值模拟

中国机械工程

等离子体焊接除尘装置设计与数值模拟

吴仲伟1;夏金兵1;时惜今2

1.合肥工业大学机械工程学院，合肥，230009
2.德克萨斯A&M大学机械工程系，卡城，77843

出版日期:2019-12-10 发布日期:2019-12-10
基金资助:
国家自然科学基金资助项目（51305119）

Design and Numerical Simulation of Plasma Welding Fume Removal Devices

WU Zhongwei1;XIA Jinbing1;SHI Xijin2

1.Mechanical Engineering College,Hefei University of Technology,Hefei,230009
2.Department of Mechanical Engineering,Texas A&M University,College Station,77843

Online:2019-12-10 Published:2019-12-10

摘要/Abstract

摘要： 基于等离子体放电吸附原理，提出吸尘-滤尘-荷电-除尘新工艺来净化焊接烟尘，并设计了能实时跟踪焊接烟尘源的除尘装置。确定了两电极板的长度与间距等参数，对等离子体静电吸附装置进行了荷电计算与三维电场分析，研究了烟尘颗粒在电场中的运动轨迹及其变化规律；利用COMSOL软件进行仿真分析，讨论了烟尘粒径、入口气体流速和板间电压对烟尘颗粒吸附效果的影响。分析结果表明：板间电压在0.6~2.4 kV范围内，在电场中运动时间t≥0.1 s时，该除尘装置对0.1~1 μm粒径的烟尘颗粒能够实现快速有效地吸附，且获得了显著的净化效果。

关键词: 焊接烟尘, 等离子体, 除尘, 净化

Abstract: Based on the principles of plasma discharge adsorption, a new technology of fume collection, fume filtration, charge and fume removal was proposed to purify welding fumes. A fume removal device was designed which might track welding fume source in real time, and parameters of length and spacing of two electrode plates were determined. By the charge calculation and three-dimensional electric field analysis of plasma electrostatic adsorption device, the motion trajectory and the change law of fume particles in electric field were studied, and COMSOL software was used to simulate and analyze the effects of particle sizes, inlet gas flow rates and inter-plate voltages on the adsorption efficiency of fume particles. The results show that when the inter-plate voltage is in the range of 0.6~2.4 kV, while movement time in the electric field is as t≥0.1 s, the fumes with 0.1~1 μm particle size may achieve rapid and efficient adsorption, and resulting in significant purification.

Key words: welding fume, plasma, fume removal, purification

中图分类号:

TG40

吴仲伟1;夏金兵1;时惜今2. 等离子体焊接除尘装置设计与数值模拟[J]. 中国机械工程.

WU Zhongwei1;XIA Jinbing1;SHI Xijin2. Design and Numerical Simulation of Plasma Welding Fume Removal Devices[J]. China Mechanical Engineering.

参考文献

[1]PARK J H, CHUN C H. An Improved Modeling for Prediction of Grade Efficiency of Electrostatic Precipitators with Negative Corona[J]. Journal of Aerosol Science, 2002, 33(4)：673-694.
[2]HAQUE S M E, RASUL M G, KHAN M M K, et al. A Numerical Model of an Electrostatic Precipitator[C]∥Proceedings of the 16th Australian Fluid Mechanics Conference. Brisbane, 2007:1050-1054.
[3]NIKAS K S P, VARONOS A A, BERGELES G C. Numerical Simulation of the Flow and the Collection Mechanisms inside a Laboratory Scale Electrostatic Precipitator[J]. Journal of Electrostatics, 2005, 63(5)：423-443.
[4]TALAIE M R. Mathematical Modeling of Wire-duct Single-stage Electrostatic Precipitators[J]. Journal of Hazardous Materials, 2005, 124(1)：44-52.
[5]JIANG Xuedong, XU He, WANG Xin. Charging and Absorption Characteristics of Small Particulates under Alternative and Electrostatic Voltages in an Electrostatic Precipitator[J]. Chinese Physics B, 2014, 23(12):125201.
[6]高得力, 杨学昌, 陈波, 等. 低Reynolds数净化器除尘效率的计算流体动力学仿真与优化[J]. 高电压技术, 2014, 40(7)：2224-2231.
GAO Deli, YANG Xuechang, CHEN Bo, et al. Fumes Collections Efficiency of Low Reynolds Purifier via Computational Fluid Dynamic Simulation and Optimization[J]. High Voltage Engineering, 2014, 40(7)：2224-2231.
[7]陈汇龙, 赵英春. 感应荷电喷雾静电场与荷电特性分析[J].高电压技术, 2010, 36(10)：2519-2524.
CHEN Huilong, ZHAO Yingchun. Electrostatic Induction Field and Charging Property of Droplet in Electrostatic Spraying Process[J]. High Voltage Engineering, 2010,36(10)：2519-2524.
[8]刘功智, 邓云峰, 荣伟东, 等. 双极不对称预荷电静电增强过滤除尘技术的应用[J]. 中国安全科学学报, 2001(6)：75-78.
LIU Gongzhi, DENG Yunfeng, RONG Weidong, et al. Application of Electrostatic Enhanced Fabric Filtering Technology with Dual-electrode Non-symmetric Precharge[J]. China Safety Science Journal, 2001(6)：75-78.
[9]郭治明, 许德玄, 孙英浩, 等. 雾化电晕放电静电除尘的实验研究[J]. 北京理工大学学报, 2005,25(9)：145-148.
GUO Zhiming, XU Dexuan, SUN Yinghao, et al. Experimental Study on Electrostatic Precipitation with Spraying Corona Discharges[J]. Transactions of Beijing Institute of Technology, 2005,25(9)：145-148.
[10]唐敏康. 高压静电场中粉尘粒子的电气性能[M]. 北京：化学工业出版社, 2010.
TANG Minkang. The Electrical Characteristics of Fumes Particles in High-voltage Electrostatic Field[M]. Beijing:Chemical Industry Press,2010.
[11]李庆, 李海凤, 孙晓荣, 等. 电晕放电电流体状态实验研究与数值模拟[J]. 高电压技术,2010,36(11):2739-2744.
LI Qing，LI Haifeng, SUN Xiaorong, et al. Experimental Research and Numerical Simulation of Electro-hydrodynamic in Corona Discharge[J]. High Voltage Engineering, 2010,36(11):2739-2744.
[12]杜小强, 刘恩晓, 武传宇, 等. 基于高速气流的光伏板表面灰尘去除分析与试验[J]. 中国机械工程， 2018,29(24):2959-2965.
DU Xiaoqiang, LIU Enxiao, WU Chuanyu, et al. Analysis and Test of Dust Removal on Photovoltaic Plate Surfaces Based on High Speed Airflow[J]. China Mechanical Engineering, 2018,29(24):2959-2965.