摘要
六氟化硫(SF_(6))是一种被广泛应用的优良绝缘气体,但其具有强温室效应,会对大气环境造成巨大的潜在危害。采用填充床式介质阻挡放电(DBD)降解SF_(6)是一种有潜力的治理手段,但目前填充介质尺寸等诸多参数影响尚且未知。该文基于填充床式介质阻挡放电研究直径为1mm、2mm和4mm的γ-Al_(2)O_(3)颗粒对降解SF_(6)的影响。发现小尺寸颗粒会缩减反应区域的气隙空间,使DBD体系趋于产生丝状放电;2mm填充体系的降解率及能效均优于1mm和4mm体系,主要原因可能是2mm填充颗粒兼顾较大的活性接触面积和较长的气体停留时间这两个重要因素;相比于2mm和4mm体系,1mm体系能够促进SO_(2)气体产生,抑制SO_(2)F_(2)、SOF_(2)和SOF_(4)气体的产生。该研究结果为SF_(6)工业无害化降解提供了理论支撑和技术指导。
Sulfur hexafluoride(SF_(6))is a widely used insulating gas,but its strong greenhouse effect can cause great potential harm to the atmospheric environment.Degradation of SF_(6) by dielectric barrier discharge(DBD)based on packed-bed reactor is a promising treatment,but the influence of many parameters such as the size of packed medium is still unknown.In this paper,the effects of γ-Al_(2)O_(3) particles with diameters of 1mm,2mm and 4mm on the degradation of SF_(6) were investigated based on packed-bed type DBD.It is found that the small size of the particles will reduce the air gap space in the reaction area,so that the DBD discharge system tends to produce filamentous discharge,the degradation rate and energy efficiency of 2mm packing system are better than those of 1mm and 4mm systems,which may be attributed to the fact that the 2mm packed particles take into account the important factors of larger active contact area and longer gas residence time.Compared with 2mm and 4mm systems,the 1mm system can promote SO_(2) gas production and inhibit SO_(2)F_(2),SOF_(2) and SOF_(4) production.The experimental results provide theoretical support and technical guidance for the industrial harmless degradation of SF_(6).
作者
张晓星
周畅
崔兆仑
张国治
伍云健
Zhang Xiaoxing;Zhou Chang;Cui Zhaolun;Zhang Guozhi;Wu Yunjian(Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment,Hubei University of Technology,Wuhan 430068,China;School of Electrical Power,South China University of Technology,Guangzhou 510640,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第18期4766-4776,共11页
Transactions of China Electrotechnical Society
基金
湖北省自然科学基金资助项目(2020CFB166)。
关键词
填充颗粒尺寸
介质阻挡放电
放电参数
降解处理
SF_(6)无害化
Packing particle size
dielectric barrier discharge
electrical discharge parameters
degradation treatment
SF_(6)harmless
