负直流电晕诱发低压电极多孔绝缘层微放电的参数优化

发布时间：2018-05-22 07:23

本文选题：低压电极 + 多孔绝缘　；参考：《高电压技术》2017年06期

【摘要】：为提高放电等离子体强度并提升VOCs的降解效率,采用线—板型放电装置,在低压电极表面涂敷多孔绝缘材料,利用负直流电晕放电诱发低压电极多孔绝缘材料微放电发生,通过考察绝缘层电阻率、薄膜厚度、孔数、孔径等参数对放电伏安特性和生成臭氧浓度的影响,对负直流电晕放电诱发低压电极微孔放电体系的实验参数进行优化。实验结果表明:与采用裸片电极相比,在低压电极覆多孔绝缘材料能有效提高等离子体强度,在所研究的材料中以多孔聚四氟乙烯对放电等离子体强度的提高效果最好。增加绝缘层孔数、降低膜厚、减小孔径均能显著提高放电等离子体强度;在聚四氟乙烯厚度为50μm、孔数为50、孔径为10μm条件下,电压为12 kV时放电电流可达到1 296μA,生成臭氧体积质量为3.11 mg/L,比采用裸片电极时分别提高了4.5倍和2.2倍;低压电极覆多孔聚四氟乙烯产生微放电能有效提高甲苯降解率,电压为13 kV时,甲苯降解率为58%,比采用裸片电极时提高了31%。
[Abstract]:In order to improve the intensity of discharge plasma and improve the degradation efficiency of VOCs, a line plate type discharge device is used to apply porous insulating material on the surface of low voltage electrode, and the micro discharge of porous insulating material of low voltage electrode is induced by negative DC corona discharge. The discharge volt ampere, such as the resistance rate of insulation layer, film thickness, pore number, aperture and so on, is used for discharge volt ampere. The experimental parameters of the negative DC corona discharge induced by the negative DC corona discharge are optimized. The experimental results show that compared with the bare electrode, the porous insulating material in the low pressure electrode can improve the plasma intensity effectively, and the porous polytetrafluoroethylene (PTFE) is used in the materials studied. The increase of plasma strength is the best. Increasing the number of insulating layers, reducing the thickness of the membrane and reducing the aperture can significantly increase the strength of the discharge plasma. Under the condition of the thickness of polytetrafluoroethylene, the number of holes is 50, the pore size is 10 mu m, the discharge current can reach 1296 u A when the voltage is 12 kV, and the volume of the ozone volume is 3.11 mg/L, compared with the bare sheet. The microdischarge of porous polytetrafluoroethylene produced by low pressure electrode can improve the degradation rate of toluene effectively. When the voltage is 13 kV, the degradation rate of toluene is 58%, which is increased by 31%. than that of the bare electrode.
【作者单位】：大连理工大学环境学院;大连理工大学电气工程学院;中国石化安全工程研究院;
【基金】：国家自然科学基金(51477025)~~
【分类号】：O461.2

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