湿式电除尘器性能测试方法及排放特征研究

doi:10.11930/j.issn.1004-9649.201805182

中国电力 ›› 2018, Vol. 51 ›› Issue (10): 123-129.DOI: 10.11930/j.issn.1004-9649.201805182

湿式电除尘器性能测试方法及排放特征研究

李皓然¹, 刘含笑², 赵琳², 颜士娟², 冯国华², 方小伟²

1. 国网冀北电力有限公司技能培训中心, 河北保定 071000;
2. 浙江菲达环保科技股份有限公司, 浙江诸暨 311800

收稿日期:2018-05-26 修回日期:2018-06-19 出版日期:2018-10-05 发布日期:2018-10-12
通讯作者: 刘含笑(1987-),男,通信作者,工程师,硕士,从事PM_2.5捕集增效技术研究,E-mail:gutounan@163.com
作者简介:李皓然(1989-),男,工程师,从事电力电子与电力传动方面的研究,E-mail:jsj07tong2@126.com
基金资助:
国家重点研发计划资助项目（2017YFC0804704；2016YFC0209107）。

Study on Performance Testing Method and Emission Characteristics of Wet Electrostatic Precipitators

LI Haoran¹, LIU Hanxiao², ZHAO Lin², YAN Shijuan², FENG Guohua², FANG Xiaowei²

1. State Grid Jibei Electric Power Company Limited Skills Training Center, Baoding 071000, China;
2. Zhejiang Feida Environmental Science & Technology Co., Ltd., Zhuji 311800, China

Received:2018-05-26 Revised:2018-06-19 Online:2018-10-05 Published:2018-10-12
Supported by:
This work is supported by National Key Research and Development Program of China (No.2017YFC0804704,No.2016YFC0209107).

摘要/Abstract

摘要： 湿式电除尘器收尘极被水膜覆盖，放电区域存在水雾，无振打二次扬尘，且细颗粒物团聚现象显著，可有效减少细颗粒物、SO₃等排放。采用一体化采样头（内置滤膜）采集颗粒物，采用重量法（PM-10）和电荷法（ELPI）测定PM_2.5；采用冷凝法或冷凝法与异丙醇吸收相结合的采样方法测定SO₃。测定结果表明，不同型式的湿式电除尘器颗粒物、PM_2.5一般分别在2~5mg/m³及3mg/m³以下，除尘效率一般在75%~95%，金属极板湿式电除尘器为连续喷淋，因不存在细颗粒物的二次扬尘，颗粒物排放可达1mg/m³以下；不同型式的湿式电除尘器SO₃排放一般在5mg/m³以下，SO₃脱除效率一般在60%~80%，导电玻璃钢湿式电除尘器板电流密度一般比金属极板湿式电除尘器大，因此其SO₃脱除效率普遍更高一些。

关键词: 超低排放, 燃煤电厂, 湿式电除尘器, 颗粒物, SO₃, PM_2.5

Abstract: Due to the water film covered dust collecting electrode, the existence of water mist in the discharge area and the absence of vibration and secondary dust extraction, particularly its mechanism to agglomerate the fine particles significantly, the wet electrostatic precipitator (WESP) is very effective to reduce the emission of fine particles such as SO₃. Particulate matter is collected by integrated sampling head (built-in filter membrane), while PM2.5 is determined by gravimetric method (PM-10) and charge method (ELPI), and SO₃ is determined by condensation method or condensation method combined with isopropanol absorption. The results show that the concentration of particulate matter in different types of WESP varies from 2mg/m³ to 5 mg/m³, and PM_2.5 is lower than 3 mg/m³ with the dust removal efficiency around 75%~95%. Continuous spray is applied in the metal plate type wet electrostatic precipitator. Since there is no secondary dust of fine particles, the emission of particulate matter is kept below 1mg/m³. The emissions characterization of SO₃ in different types of WESP is generally below 5mg/m³, with the SO₃ removal efficiency about 60%~80%. The current density of conductive fiberglass WESP is generally greater than that of metal plate WESP, hence its SO₃ removal efficiency is generally higher.

Key words: ultra-low emission, coal-fired power plant, WESP, particles, SO₃, PM_2.5

中图分类号:

李皓然, 刘含笑, 赵琳, 颜士娟, 冯国华, 方小伟. 湿式电除尘器性能测试方法及排放特征研究[J]. 中国电力, 2018, 51(10): 123-129.

LI Haoran, LIU Hanxiao, ZHAO Lin, YAN Shijuan, FENG Guohua, FANG Xiaowei. Study on Performance Testing Method and Emission Characteristics of Wet Electrostatic Precipitators[J]. Electric Power, 2018, 51(10): 123-129.

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https://www.electricpower.com.cn/CN/Y2018/V51/I10/123

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湿式电除尘器性能测试方法及排放特征研究

Study on Performance Testing Method and Emission Characteristics of Wet Electrostatic Precipitators

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湿式电除尘器性能测试方法及排放特征研究

Study on Performance Testing Method and Emission Characteristics of Wet Electrostatic Precipitators

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