Numerical Simulation of Synergetic Removal of Particulate Matter by Spraying During Wet Flue Gas Desulfurization

被引：0
|
作者：
Li C. [1 ]
Ji B. [1 ]
Song Q. [1 ]
Yao Q. [1 ]
机构：
[1] Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 04期
基金：
国家重点研发计划;
关键词：
Dedust; Inertial capture; Particulate matter; Spray; Thermophoresis; Wet flue gas desulfurization (WFGD);
D O I：
10.13334/j.0258-8013.pcsee.181424
中图分类号：
学科分类号：
摘要：
The synergetic effect of wet flue gas desulfurization (WFGD) system can further reduce the emission of particulate matter from the coal-fired plants. Mathematical model and numerical method were established to describe the gas-liquid-solid three-phase movement in the tower, and the process of particle removal by spraying in WFGD system was simulated. The results show that the efficiency of particle removal increases with the increase of particle size. The major mechanism for capturing submicron particles is thermophoresis, and the region with large gas-liquid temperature difference is the main capturing area. Micron particles are captured mainly by inertial capture mechanism, and the capture efficiency of single droplet near the spray layers is the highest. Besides, the area near the flue gas inlet is with high concentration of droplets, large temperature difference and high particle concentration in the original flue gas, so it is the most important area to remove particles of each size. The dedusting performance of WFGD can be optimized by increasing the temperature difference between gas and liquid, the relative velocity of gas and liquid, and the ratio of liquid to gas. © 2019 Chin. Soc. for Elec. Eng.
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页码：1070 / 1078
页数：8
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