[1]李海华,王魁英,杨小丽,等.水下脉冲放电等离子体系统及其放电特性研究[J].郑州大学学报(工学版),2022,43(03):93-97.
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水下脉冲放电等离子体系统及其放电特性研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年03期
页码:
93-97
栏目:
出版日期:
2022-04-10

文章信息/Info

Title:
Research on Pulsed Discharge Plasma System Underwater and Its Discharge Characteristics
作者:
李海华王魁英杨小丽王志琛张梦梦
文献标志码:
A
摘要:
采用 Ar / O2 混合气体作为放电气体,脉冲电源作为驱动电源以提高放电效率,采用微孔陶瓷电极以提高放电生成的活性物质的传质效果。 通过最低激发电压分析和光谱诊断·OH、H2 O2 、O3 等活性物质生成情况,分析不同放电条件下的靛蓝染料降解特性,系统研究了该水下放电系统的放电特性。 实验结果表明:该装置最低可实现 2. 1 kV 的低电压驱动水下大面积均匀放电,氧气占比对放电激发电压的影响最大光谱分析结果未能诊断到·OH 的特征光谱,但是显示有激发态的 H、O 等活性物质生成增加频率和电压有利于·OH、H2 O2 、O3 等活性物质的生成及染料脱色效率的增加增加气体流量有利于H2 O2 、O3 的生成,但是不利于·OH 的生成,整体上对染料脱色效率的影响不大随着氧气占比增加,O3生成量增加,但是·OH、H2 O2 及 最终 的染料脱色效率 先增加后降低。 综合考 虑各因素及成本问题, 系统最佳放电 条件:气体流量 Ar 为 160 mL / min、O2 为 40 mL / min、输出频率为 2 kHz、脉冲电源电压为 5 kV、脉宽为 1 μs,此条件下放电 1 0 min 后对靛蓝 二磺酸钠的 平均脱色 率达到 97. 8%。
Abstract:
Abstract : In this study , the discharge efficiency and mass transfer effect were improved with the Ar/O, mixed gas as discharge gas,a pulse power supply as driving power, and a specially designed microporous ceramicelectrode. Discharge characteristics underwater were syslematically studied by the analysis of the lowest excita-tion voltage ,emission spectrum , active substance generation ( such as·OH ,H,0,,0, ) ,and Indigo Carminedegradation characteristics. Experimental results showed that this system could achieve a large-area uniformdischarge underwater with driving voltage as low as 2.1 kV, the 0, proportion had the greatest effect on theexcitation voltage of the discharge. Although the attempt to find the characteristic spectrum of ·0H failed ,active substances such as H and 0 in excited state were detected in the spectral analysis results. The imncreaseof frequency and voltage was conducive to the generation of active substances,such as OH,H,0,,0,, andthe dye decolorization efficiency. The increase of gas flow was in favor of the H,0, and 0, generation,butadverse to the ·OH generation ,and had little effect on the dye decolorization efficiency. As the O, proportion increased , the generation amount of 0,increased gradually, but the·OH,H,0, generation,as well as thedecolorization efficiency increased firstly and then decreased. Discharge conditions and cost problems werecomprehensively considered ,the oplimum condition of this discharge system was as follow : gas flow 200 sccm( Ar 80% ,0, 20%) , frequency 2 kHz,voltage 5 kV , pulse width 1 us. The average decolorizaltion rale ofIndigo Carmine reached 97.8% in 10 minutes in this ideal discharge condition.
更新日期/Last Update: 2022-05-02