采用辉光放电等离子体的烟气处理技术研究

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摘要

基于大气压空气辉光放电等离子体技术，采用多层网状接触式电极结构在烟道中形成大面积均匀稳定的辉光放电.利用放电过程中产生的强氧化活性粒子（·OH、O、O₃）氧化脱除烟气中的SO₂和NO_x.探讨接触式电极下辉光放电等离子体的生成特性和脱硫脱硝反应机制，分析不同电极层数、氧气浓度和待处理气体初始浓度等实验条件下的烟气处理效果.结果表明，在6层网状电极，氧气浓度为8%，烟气停留时间为1.2s的实验条件下，脱硫率在96.3%以上，NO氧化率为91.2%，脱硝率为36.7%.辉光放电等离子体以其高密度的带电粒子特性在烟气处理中显示出良好的能量利用效率.

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	刘文正
	赵帅
	柴茂林
	牛江奇
	赵强
	李静波

关键词 ：大气压空气辉光放电, 接触式电极, 脱硫脱硝

Abstract：

Based on the technology of atmospheric pressure glow discharge plasma in air, a multilayer mesh-like contact type electrode structure was used to form a large-area, uniform and stable glow discharge in the flue. During the discharge process, particles with high oxidative activity (·OH, O, O₃) were generated to remove the SO₂ and NO_x in flue gas. The characteristics of glow discharge plasma and the mechanism of desulfurization and denitrification with the contact electrode were discussed. The effects caused by different electrode layer numbers, oxygen concentrations and initial concentrations of gas to be treated were also analyzed. The results showed that removal rates of 96.3% for SO₂, 36.7% for NO_x, and oxidation rate of 91.2% for NO were obtained in the following experimental conditions:the layer number of mesh-like electrodes was 6; the concentration of oxygen was 8%; the reaction time of flue gas was 1.2s.With its high density of charged particles, the glow discharge plasma showed good energy utilization efficiency in the flue gas treatment.

Key words： atmospheric pressure glow discharge plasma in air contact electrode desulfurization and denitrification

收稿日期: 2017-01-12

PACS:

X701

基金资助:

北京市科技计划专项（Z15010101478）

通讯作者: 刘文正,教授,wzhliu@bjtu.edu.cn E-mail: wzhliu@bjtu.edu.cn

作者简介: 刘文正(1964-),男,北京人,教授,主要从事等离子体科学与技术的研究.发表论文50余篇.

引用本文:

刘文正, 赵帅, 柴茂林, 牛江奇, 赵强, 李静波. 采用辉光放电等离子体的烟气处理技术研究[J]. 中国环境科学, 2017, 37(8): 2905-2914. LIU Wen-zheng, ZHAO Shuai, CHAI Mao-lin, NIU Jiang-qi, ZHAO Qiang, LI Jing-bo. Technology of flue gas treatment with glow discharge plasma. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(8): 2905-2914.

链接本文:

http://manu36.magtech.com.cn/Jweb_zghjkx/CN/ 或 http://manu36.magtech.com.cn/Jweb_zghjkx/CN/Y2017/V37/I8/2905

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