悬浮导体电极电晕放电凝并亚微米颗粒物研究  

Study on Corona Discharge Coagulation and Submicron Particles with Floating Conductor Electrode

作　　者：向来 彭邦发 王荣刚 刘政妍 姜楠[1] 李杰[1] XIANG Lai;PENG Bangfa;WANG Ronggang;LIU Zhengyan;JIANG Nan;LI Jie(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,China;Suzhou TA&A Ultra Clean Technology Co.,Ltd.,Suzhou 215121,China;College of the Environment,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学电气工程学院,大连116024 [2]苏州天华超净科技股份有限公司,苏州215121 [3]大连理工大学环境学院,大连116024

出　　处：《高电压技术》2022年第12期5110-5119,共10页High Voltage Engineering

基　　金：国家自然科学基金(52107140,51877027);中国博士后科学基金(2021M700662,2022T150083)。

摘　　要：为提升亚微米颗粒物的凝并效果,提出在针-针高低压电极之间引入悬浮导体电极的结构,采用单极性直流高压电源供电,在悬浮导体电极两侧分别产生正、负电晕放电,实现对气体中亚微米颗粒物的荷电和凝并。研究了电极系统放电特性、颗粒物荷电量和凝并效果,以及电流体动力学模拟。研究结果表明:引入悬浮导体电极后,起晕电压、火花击穿电压略有增加,且在相同供电电压下电晕电流下降;在供电电压为15 kV的条件下,采用悬浮导体电极结构使颗粒物荷电量增加了10%,0.3μm和0.5μm粒径颗粒物的凝并效率分别增加了20%和35%;悬浮导体电极板开孔时凝并效果低于无开孔的悬浮电极板凝并效果,且随着悬浮导体电极开孔率增加亚微米颗粒物凝并效果下降。仿真结果表明引入悬浮导体电极后,增强了针尖区域内的离子风,增加了单个亚微米颗粒荷元电荷数,颗粒粒径越大荷元电荷数量提升越多;对于0.3μm的颗粒物,引入悬浮导体电极后荷电数量由195e提升至243e,荷电量提升了24%。In order to improve the coagulation effect of submicron particles,a structure of introducing a floating conductor electrode between the needle-needle high and low voltage electrodes is proposed.Unipolar DC high voltage power supply is used to induce the positive and negative corona discharges,which is favor of charging and coagulation of submicron particles in gases.Discharge characteristics of electrode system,particle charge and coagulation effects and electrohydrodynamic simulations are studied.The research results show that,the onset voltage and spark breakdown voltage are slightly increased after introducing the floating conductor electrode.The corona current decreases under the same supply voltage.When the power supply voltage is 15 kV,the floating conductor electrode structure increases the charge of particles by 10%,and the coagulation efficiency of the 0.3μm and 0.5μm particles increases by 20%and 35%.The coagulation effect of the floating electrode plate with opening holes is lower than that of the floating electrode plate without opening holes.The coagulation effect of submicron particles decreases with the increase of the opening rate of the floating conductor electrode.The simulation results show that,the introduction of floating conductor electrode enhances the ionic wind in the tip area and increases the charged elementary charge number of single submicron particle.The larger the particle size is,the more the charged charge number increases.For the particles of 0.3μm,the number of elemental charge increases from 195e to 243e,and the amount of charge increases by 24%after introducing the floating conductor electrode.

关 键 词：悬浮导体电极 单极性电源供电 双极性电晕放电 亚微米颗粒物 静电凝并 

分 类 号：TM721.1[电气工程—电力系统及自动化] O461[理学—电子物理学]