【摘要】：近些年來,空氣污染問題日益受到公眾的關注。對居室、辦公室、車輛等室內(nèi)環(huán)境的空氣污染狀況及其凈化措施的研究尤為重要,其中應用低溫等離子體實現(xiàn)空氣凈化最為引人注目。本文首先對低溫等離子體的產(chǎn)生原理進行初步的理論分析,對低溫等離子體常用的幾種產(chǎn)生方式(輝光放電、射頻放電、微波放電、電暈放電、介質阻擋放電)進行簡單介紹和比較;介紹介質阻擋放電的典型結構和幾種工作模式(絲狀放電模式、斑圖放電模式、大氣壓輝光放電模式),解釋低溫等離子體室內(nèi)空氣凈化的機理。然后以納秒前沿脈沖電源為外加電源,完成在不同的脈沖峰值電壓下,針陣電極的針尖間距對介質阻擋放電的放電特性和對SO_2氣體凈化效率的影響實驗。利用相關理論對實驗數(shù)據(jù)進行初步分析,找到了最佳針尖間距使放電能量密度和SO_2氣體凈化效率達最高。最后以高壓高頻正弦電源為外加電源,完成在不同的電源頻率下,在一系列幅值電壓下,針陣電極的針尖間距對介質阻擋放電的放電特性和對SO_2氣體凈化效率的影響實驗。并利用實驗數(shù)據(jù)和相關理論進行初步分析,找到了最佳針尖間距使放電功率密度和SO_2氣體凈化效率達最高。
[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.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O53;O461.2

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