摘要
为了研究电除尘器内气流场对细颗粒物捕集的影响,采用二维粒子成像测速法(2D-PIV)对电除尘器内亚微米细颗粒物的运动规律进行测试.实验中,采用艾灸烟作为示踪粒子,线-板式电除尘器板间距为200mm,通过改变高压放电极或电晕放电极性进行实验.结果表明,对单线电极电除尘器施加50kV高压时,线电极周围会形成4个涡旋.对双线电极电除尘器来说,由于涡旋的相互作用,会形成更多的涡旋,且分布在双电晕线之间的4个涡旋更加均匀对称.从涡旋形貌来看,正电晕或负电晕放电具有相似的涡旋分布,采用线电极或芒刺电极时,也具有相似的涡旋分布.采用双芒刺电极时,由于注入更高的放电能量,颗粒物速度大幅提高,最高值可达1.6m/s,是一次流速的3倍.
In order to investigate the influence of gas flow field on fine particles precipitation of electrostatic pricipitator （ESP）, submicron particle movement inside an ESP was measured by using two-dimensional Particle Image Velocimetry （2D-PIV） technique. Moxa-moxibustion smoke was used as the tracer for the experiments. The wire-plate type ESP had gap distance of 200 mm. Experiments were performed with changing the high-voltage wires or corona discharge polarities. For a single high-voltage wire ESP and at the applied voltage of 50 kV, four generated vortexes around the wire are usually observed. For the ESP with double corona wires, more vortexes are produced due to their interaction. The four vortexes become much more symmetrical in between the two corona wires. Positive or negative corona discharges give simi- lar vortexes in terms of their shapes. They are also similar each other when using wire or spike type elec- trodes. The particle velocity, however, can be significantly increased when using the double spike elec- trode due to its larger discharge power. The observed maximum velocity is about 1.6 m/s, which is almost three times of the primary gaseous velocity.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第5期985-992,共8页
Journal of Zhejiang University：Engineering Science
基金
国家“863”高技术研究发展计划资助项目(2013AA065000)
浙江省公益技术应用研究项目(2010C31013)
