翘片-筒式脉冲电晕流光放电装置对二氯甲烷的降解效果及其稳定性  

Degradation effect and system stability of dichloromethane by fins-cylinder pulse corona streamer discharge

作　　者：魏晓坤 王洪昌[2] 彭邦发 刘政妍 朱金伟[2] 崔宇韬[2] 张辰[2] 谭玉玲[2] 姜楠[3] 李杰[3] WEI Xiaokun;WANG Hongchang;PENG Bangfa;LIU Zhengyan;ZHU Jinwei;CUI Yutao;ZHANG Chen;TAN Yuling;JIANG Nan;LI Jie(School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China;School of Electrical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学环境学院,大连116024 [2]中国环境科学研究院,北京100012 [3]大连理工大学电气工程学院,大连116024

出　　处：《环境工程学报》2023年第6期1876-1885,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51877028);新疆生产建设科技发展基金资助项目(2019BC009);中央高校基本科研业务费资助项目(DUT22JC04)。

摘　　要：传统结构线-筒式电晕放电装置在降解VOCs时生成的副产物会粘附在放电区域(线电极)上,使得放电间距减小,导致降解效果不稳定。翘片-筒式脉冲电晕流光放电等离子装置的电极结构可将放电区域(翘片尖端-筒)与副产物粘附区域(连接翘片的轴线)分开,从而维持装置的放电强度和稳定性。当翘片-筒式脉冲电晕流光放电反应器相邻翘片间距/放电间距为1,在37 kV下,反应器功率为0.95 W,能量体积密度为和23.6 mJ·L-1,为最优电极配置;处理二氯甲烷2 h后的降解效率呈现小幅度下降后稳定在35%。因此,放电形成的气溶胶部分沉积在凹槽处,可维持反应器稳定的放电强度及对二氯甲烷的降解效率。本研究结果可为低温等离子体处理VOCs废气的性能提升提供参考。The conventional structure of corona discharge is mainly wire-cylinder,and the by-products generated during the degradation of VOCs will adhere to the discharge area(wire electrode) to reduce the discharge spacing,resulting in unstable degradation effect.Therefore,this study proposed a fins-cylinder pulsed corona streamer discharge plasma electrode structure,which separated the discharge area(tip of fins-cylinder)from the by-product adhesion area(axis connecting the fins)to enhance the system discharge intensity and stability.The results showed that the fins electrode structure with adjacent fin spacing/discharge spacing(A/B=1) was the best electrode design,with highest values of reactor power and energy volume density at 31 kV being 0.98 W and 37.9 mJ·L-1,respectively.The degradation efficiency of dichloromethane decreased slightly after 2 h treatment and then stabilized at 35%.Aerosols produced by the discharge were partially deposited in the grooves without substantially altering the electrode discharge,which guaranteed the stability of the intensity of the discharge and the degradation efficiency of dichloromethane..This study can serve as a foundation for future research on low temperature plasma treatment of VOC exhaust gas.

关 键 词：翘片-筒式 电晕流光放电 等离子体 降解 挥发性有机污染物 

分 类 号：X51[环境科学与工程—环境工程]