放电电源对DBD放电特性及室内空气净化效率影响的实验研究
发布时间：2018-10-13 18:26
【摘要】：近些年来,空气污染问题日益受到公众的关注。对居室、办公室、车辆等室内环境的空气污染状况及其净化措施的研究尤为重要,其中应用低温等离子体实现空气净化最为引人注目。本文首先对低温等离子体的产生原理进行初步的理论分析,对低温等离子体常用的几种产生方式(辉光放电、射频放电、微波放电、电晕放电、介质阻挡放电)进行简单介绍和比较;介绍介质阻挡放电的典型结构和几种工作模式(丝状放电模式、斑图放电模式、大气压辉光放电模式),解释低温等离子体室内空气净化的机理。然后以纳秒前沿脉冲电源为外加电源,完成在不同的脉冲峰值电压下,针阵电极的针尖间距对介质阻挡放电的放电特性和对SO_2气体净化效率的影响实验。利用相关理论对实验数据进行初步分析,找到了最佳针尖间距使放电能量密度和SO_2气体净化效率达最高。最后以高压高频正弦电源为外加电源,完成在不同的电源频率下,在一系列幅值电压下,针阵电极的针尖间距对介质阻挡放电的放电特性和对SO_2气体净化效率的影响实验。并利用实验数据和相关理论进行初步分析,找到了最佳针尖间距使放电功率密度和SO_2气体净化效率达最高。
[Abstract]:In recent years, air pollution has attracted increasing public attention. It is very important to study the indoor air pollution and its purification measures in the indoor environment such as room, office, vehicle and so on. The application of low temperature plasma to realize air purification is the most attractive one. In this paper, the generation principle of low temperature plasma is analyzed, and several kinds of generation methods (glow discharge, radio frequency discharge, microwave discharge, corona discharge) are analyzed. The typical structure of dielectric barrier discharge and several working modes (filamentary discharge mode, pattern discharge mode) are introduced. Atmospheric pressure glow discharge mode), explaining the mechanism of low temperature plasma indoor air purification. Then, the nanosecond forward pulse power supply is used as the external power source. The effect of the tip spacing of the needle array electrode on the discharge characteristics of dielectric barrier discharge and the gas purification efficiency of SO_2 is studied under different pulse peak voltages. The experimental data were preliminarily analyzed by using the relevant theory. It was found that the best tip spacing resulted in the highest discharge energy density and the highest efficiency of SO_2 gas purification. Finally, the high voltage high frequency sinusoidal power supply is used as the external power source, and the effect of the tip spacing of the needle array electrode on the discharge characteristics of dielectric barrier discharge and the purification efficiency of SO_2 gas is carried out under a series of amplitude voltages at different power frequencies. Based on the experimental data and related theory, it is found that the best tip spacing can achieve the highest discharge power density and SO_2 gas purification efficiency.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O53;O461.2
本文编号：2269532
[Abstract]:In recent years, air pollution has attracted increasing public attention. It is very important to study the indoor air pollution and its purification measures in the indoor environment such as room, office, vehicle and so on. The application of low temperature plasma to realize air purification is the most attractive one. In this paper, the generation principle of low temperature plasma is analyzed, and several kinds of generation methods (glow discharge, radio frequency discharge, microwave discharge, corona discharge) are analyzed. The typical structure of dielectric barrier discharge and several working modes (filamentary discharge mode, pattern discharge mode) are introduced. Atmospheric pressure glow discharge mode), explaining the mechanism of low temperature plasma indoor air purification. Then, the nanosecond forward pulse power supply is used as the external power source. The effect of the tip spacing of the needle array electrode on the discharge characteristics of dielectric barrier discharge and the gas purification efficiency of SO_2 is studied under different pulse peak voltages. The experimental data were preliminarily analyzed by using the relevant theory. It was found that the best tip spacing resulted in the highest discharge energy density and the highest efficiency of SO_2 gas purification. Finally, the high voltage high frequency sinusoidal power supply is used as the external power source, and the effect of the tip spacing of the needle array electrode on the discharge characteristics of dielectric barrier discharge and the purification efficiency of SO_2 gas is carried out under a series of amplitude voltages at different power frequencies. Based on the experimental data and related theory, it is found that the best tip spacing can achieve the highest discharge power density and SO_2 gas purification efficiency.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O53;O461.2
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