填充床介质阻挡放电臭氧发生器的实验研究  

Experimental Study of Packed-bed Dielectric Barrier Discharge Applied on Ozone Reactor

作　　者：魏俊[1] 钱树楼 王城[1] 夏维东[1] 

机构地区：[1]中国科学技术大学工程科学学院,合肥230026

出　　处：《高电压技术》2017年第8期2696-2701,共6页High Voltage Engineering

基　　金：国家自然科学基金(11475174;11035005)~~

摘　　要：在介质阻挡放电间隙填充介质颗粒,即填充床介质阻挡放电形式可以提升臭氧生成浓度和能量效率。因而设计了一种外玻璃管式填充床介质阻挡放电臭氧发生器,填充颗粒为玻璃微珠和金属微粉混合物。实验研究了填充床和空床放电的电学特性,以及产生臭氧浓度和能效与放电功率间的关系,并分析了介质损耗、冷却水温度、能流密度等因素的影响。实验结果表明:填充床在低能流密度下相比空床放电生成臭氧质量浓度低约40%,而在高能流密度下质量浓度提升约30%,能效曲线先上升后下降,2 mm间隙填充的最大臭氧质量浓度达到60 g/m3;低温冷却水有利于臭氧生成,5℃冷却水的效果比20℃质量浓度提升约17%;添加金属微粉有利于增强放电、提升臭氧质量浓度和能效,提升幅度约25%。In order to improve the concentration and energy efficiency of generated ozone, dielectric particles were packed into space of dielectric barrier discharge （PB-DBD）. So we designed a PB-DBD reactor with glass beads and met- al powder packed inside the discharge gap, we studied the relationship between the electrical properties of DBD/PB-DBD and ozone concentration, yield, energy efficiency, and power. Moreover, we analyzed the influences of three parameters, such as the cooling water temperature, dielectric loss and energy flux density. The test results show that PB-DBD gets about 40 percent lower ozone generation than DBD when the energy flux density is small, but about 30 percent higher at large energy flux density. Energy efficiency curve rises first and falls later as power increases, and the max ozone concen- tration is 60 g/m^3 when the discharge gap is 2 rnm. Low-temperature cooling water is beneficial to ozone generation, such as that PB-DBD reactor using 5 ℃ cooling water gets about 17 percent higher ozone generation than that using 20 ℃ cooling water. Metal powder addition is also important in enhancing discharge and increasing ozone concentration and energy efficiency, which is about 25 percent.

关 键 词：臭氧 介质阻挡放电 填充床 折合场强 介质损耗 

分 类 号：TQ123.2[化学工程—无机化工]