摘要
SF_(6)因其优良的绝缘性能被广泛应用于各种高压电气设备中,但SF_(6)是一种强温室效应气体,对SF_(6)进行降解可极大地减少SF_(6)对大气的危害。为此基于脉冲介质阻挡放电等离子体技术协同外加气体O_(2)和H_(2)O对SF_(6)进行降解处理。研究表明:O_(2)的加入对放电电流有促进作用,适量O_(2)的加入可有效促进SF_(6)的降解;随着外加O_(2)含量的增加,SF_(6)降解率和能量效率先上升后下降;2%的SF_(6)在输入功率为45 W、气体体积流量为50 mL/min的条件下,O_(2)体积分数为1%时反应体系获得最高降解率和能量效率,分别为58.40%、5.24 g/kWh。在SF_(6)/Ar/O_(2)/H_(2)O体系,H_(2)O的加入可提高SF_(6)的降解率,当加入1%H_(2)O时,SF_(6)具有最优的降解效果,而随着H_(2)O含量的继续增加,SF_(6)降解率逐渐降低;在1%H_(2)O和1%O_(2)加入时,SF_(6)具有最优降解率,此时SF_(6)降解率和能量效率分别为89.7%和8.05 g/kWh。此外,O_(2)的加入会抑制SO_(2)的生成,而H_(2)O的加入会促进SO_(2)的产生,同时随着H_(2)O含量的增加,SO_(2)F_(2)的产物选择性逐渐降低;在SF_(6)/Ar/O_(2)体系中,SO_(2)F_(2)与SOF_(4)为降解产物中的主要组成部分,还存在SOF_(2)、SO_(2)、SiF_(4)、SF_(4)等分解产物。该研究根据红外光谱图和分解产物详细分析了O_(2)参与下SF_(6)的分解路径。
SF_(6)is widely used in various high voltage electrical equipment because of its excellent insulation performance.However,SF_(6)is a strong greenhouse effect gas.The degradation of SF_(6)can greatly reduce the harm of SF_(6)to the atmos-phere.In this study,SF_(6)was degraded by pulsed dielectric barrier discharge plasma with the addition of O_(2)and H_(2)O.The results showed that the addition of O_(2)could promote the discharge current,and the degradation of SF_(6)could be effectively promoted by the addition of appropriate amount of O_(2).With the increase of O_(2)content,the degradation rate and energy efficiency of SF_(6)first increased and then decreased.The reaction system obtained the highest degradation rate and energy efficiency of 58.40%and 5.24 g/kWh,respectively,when the input power was 45 W,the gas flow rate was 50 mL/min,the content of O_(2)was 1%and the content of SF_(6)was 2%.In the SF_(6)/Ar/O_(2)/H_(2)O system,the addition of H_(2)O could im-prove the degradation rate of SF_(6).When 1%H_(2)O was added,the degradation rate of SF_(6)had the best degradation effect,but the degradation rate gradually decreased with the increase of H_(2)O content.The degradation rate and energy efficiency of SF_(6)were 89.7%and 8.05 g/kWh,respectively,when 1%H_(2)O and 1%O_(2)were added.In addition,the addition of O_(2)inhibited the formation of SO_(2),while the addition of H_(2)O promoted the production of SO_(2).At the same time,the product selectivity of SO_(2)F_(2)gradually decreased with the increase of H_(2)O content.In the SF_(6)/Ar/O_(2)system,SO_(2)F_(2)and SOF_(4)are the main components of the degradation products,and there are also decomposition products such as SOF_(2),SO_(2),SiF_(4)and SF_(4).In this paper,the decomposition path of O_(2)in SF_(6)is analyzed in detail according to the infrared spectra and decom-position products.
作者
李亚龙
杨照迪
万昆
张英
王明伟
张晓星
LI Yalong;YANG Zhaodi;WAN Kun;ZHANG Ying;WANG Mingwei;ZHANG Xiaoxing(Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan 430068,China;Scientific Research Institute of Electric Power,Guizhou Power Grid Company Ltd.,Guiyang 550002,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2024年第11期5219-5228,共10页
High Voltage Engineering
基金
湖北省自然科学基金创新群体项目(2021CFA025)
国家自然科学基金(52307170)
湖北省自然科学基金(2023AFB382)
贵州省科技支撑项目(黔科合支撑[2022]一般207)。
