Factors affecting discharge performance of high-temperature coal pyrolysis gas

被引：0
|
作者：
Zhao Y.-F. [1 ]
Fang M.-X. [1 ]
Shi Y.-M. [1 ]
Xia Z.-X. [1 ]
Cen J.-M. [1 ]
机构：
[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2021年 / 55卷 / 11期
关键词：
Atmosphere; Discharge; High-temperature pyrolysis gas; Power supply polarity; Water vapor;
D O I：
10.3785/j.issn.1008-973X.2021.11.012
中图分类号：
学科分类号：
摘要：
A laboratory high-temperature discharge system was used to study factors affecting discharge performance of high-temperature coal pyrolysis gas for improving the dust remove efficiency and stability of high-temperature coal pyrolysis gas dust removal, focusing on the influence of temperature, atmosphere, conditioning optimization and power supply polarity on the discharge characteristics of pyrolysis gas. Results show that, increasing the temperature, the discharge current of the pyrolysis gas increases, and the corona and breakdown voltage decrease, which is not conducive to particle removal. For high-temperature pyrolysis gas, reducing the volume fraction of CH4 and increasing the volume fraction of H2 and CO2 reduce the discharge current, increase the corona and breakdown voltage, which is more conducive to particle removal. With adding water vapor, the corona initiation voltage increases, the discharge current obviously decreases, the corona discharge interval is wider, and the V-I characteristic curve shifts to the right, which has a more obvious optimization effect on the discharge performance. Applying voltage via positive polarity power supply at high temperature, the standard gas and the pyrolysis gas after tempering with water vapor have higher breakdown voltage and positive corona discharge area, and the performance is better than that of the negative polarity power supply. © 2021, Zhejiang University Press. All right reserved.
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页码：2115 / 2124
页数：9
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