燃煤电厂电除尘PM10和PM2.5的排放控制Ⅳ:采用二维PIV除尘

被引：17

作者：

沈欣军 ^{[1
,2
]}

郑钦臻 ^{[1
]}

宁致远 ^{[1
]}

王仕龙 ^{[3
]}

韩平 ^{[3
]}

闫克平 ^{[1
]}

机构：

[1] 浙江大学工业生态与环境研究所

[2] 沈阳工业大学理学院

[3] 神华国能集团有限公司

来源：

科技导报 | 2014年 / 32卷 / 33期

基金：

国家高技术研究发展计划(863计划);

关键词：

电除尘; 粒子成像测速法; 细颗粒物; 颗粒物;

D O I：

暂无

中图分类号：

X773 [电力工业];

学科分类号：

080707 [能源环境工程];

摘要：

利用粒子成像测速法(PIV)和电子低压冲击仪(ELPI),研究实验室规模的电除尘器(ESP)内电场强度、电晕放电功率和气流场等因素对PM10(粒径小于10μm的颗粒物)分级收尘效率。电除尘器为线-板式电极结构,其中板-板间距为200 mm,高电压电极为单根或双根。实验颗粒物采用艾灸烟作为示踪粒子,气体流量85 m3/h,颗粒物初始质量浓度33 mg/m3左右。实验结果表明,随着电场强度或电晕放电功率的增加,在高压电晕极线周围气流场从有规律的单个涡旋发展为相互作用的多个涡旋,优化电晕放电离子风分布是提高PM10收集效率和降低电耗的关键。从颗粒物个数浓度、外加电场或电晕放电功率看,可将电除尘器性能以电场强度为3 k V/cm为界分为2个区域。当电场强度低于3 k V/cm时,分级除尘效率随着电场强度或电除尘指数的增加而增加。然而,当电场强度远大于3 k V/cm时,收尘效率基本不变或降低。

引用

页码：43 / 50

页数：8

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