Numerical Simulation Study on the Influence Factors of Graded Dust Collection Efficiency of Condensed Mist Eliminator

被引：0

作者：

Li X. ^{[1
]}

Ge C. ^{[1
]}

Liu W. ^{[1
]}

Jiang N. ^{[1
]}

Liu J. ^{[2
]}

Tang F. ^{[1
]}

机构：

[1] Zhejiang Tiandi Environmental Protection Technology Co. Ltd., Hangzhou

[2] Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2021年 / 41卷 / 13期

关键词：

Condensed mist eliminator; Graded dust collection; Inertial capture; Numerical simulation; Saturation; Thermophoresis;

D O I：

10.13334/j.0258-8013.pcsee.201106

中图分类号：

学科分类号：

摘要：

The synergetic effect of condensed mist eliminator can further reduce the emission of particulate matter from the coal-fired plants. The mathematical model and numerical method were established to describe the three-phase movement in the condensing mist eliminator, and the process of the influence of graded dust collection efficiency of condensed mist eliminator was simulated. Furthermore, the influence of flue gas velocity, relative temperature difference, relative humidity and heat exchange area of demister on particle size growth and removal were analyzed. The results showed that the major mechanism for capturing particles (£2.05μm) was thermo phoresis; the capture efficiency of particles (£1.03μm) was obviously affected by the humidity of flue gas; particles (³2.05μm) were captured mainly by inertial capture mechanism; the collection efficiency of particles increased with the increase of the heat exchange area of the demister. It can be seen that when the inlet flue gas temperature was kept above 50℃, the relative humidity of flue gas is above 95%, the wall temperature of the demister is below 25℃, the flue gas flow rate was greater than 3.14m/s, the channel gap of the demister was kept within 20mm, the length of the channel was more than 350mm, and the number of peaks was greater than or equal to 2, which was conducive to improve the collaborative dust removal performance of the condensing mist eliminator. The research results can provide theoretical guidance for structure optimization and engineering application of condensing mist eliminator. © 2021 Chin. Soc. for Elec. Eng.

引用

页码：4594 / 4602

页数：8

共 20 条

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