湍流团聚促进燃煤烟气中PM10及痕量元素脱除的研究

来源期刊:中南大学学报(自然科学版)2021年第1期

论文作者:段钰锋 申奥 杨林军 吴新 梁财

文章页码:106 - 116

关键词:燃煤烟气;湍流团聚;PM10;痕量元素;协同脱除

Key words:coal-fired flue gas; turbulent agglomeration; PM10; trace elements; synergetic removal

摘    要:提出利用湍流团聚的方法实现2种污染物(PM10和痕量元素)的协同脱除。采用数值模拟优化湍流装置的结构,在燃煤热态试验平台上进行湍流团聚促进电除尘脱除PM10的研究,同时测定PM10样品中痕量元素的含量,发现PM10粒径和痕量元素含量之间的关联。研究结果表明:不同结构的扰流涡片耦合作用对PM10具有更好的团聚效果;湍流团聚使电除尘出口处PM10的数量浓度降低了50%;由于反应过程的复杂性,具有不同挥发特性的痕量元素在PM10中的含量有较大差异,Hg由于挥发性较强受到PM10粒径的影响较大但总体含量较少,其他挥发性较差的痕量元素受PM10粒径的影响较小但总体含量较多;湍流团聚能够通过促进PM10的脱除实现颗粒态痕量元素的协同脱除。

Abstract: The turbulent agglomeration was proposed to achieve the synergistic removal of the two kinds of pollutants(PM10 and trace elements). The structure of turbulent device was optimized by numerical simulation study. The removal of PM10 by electrostatic precipitator enhanced by the turbulent agglomeration was studied on a coal-fired experimental facility. The content of trace elements in PM10 samples was determined and the relationship between them was discussed in depth. The correlation between the particle size of PM10 and the content of trace elements was also studied. The results show that the coupling action of different disturbing blades can enhance the agglomeration of PM10. The number concentration of PM10 at the outlet of electrostatic precipitator is reduced by 50% because of the turbulent effect. Due to the complexity of reaction process, the contents of trace elements with different volatile characteristics in PM10 are quite different: Hg is greatly affected by the particle size of PM10 due to its strong volatility, but its overall content is less; while other trace elements besides Hg are less effected by the particle size of PM10 but their total contents are high. Turbulent agglomeration can promote the synergistic removal of particulate trace elements in the way of enhancing removal efficiency of PM10.

相关论文

  • 暂无!

相关知识点

  • 暂无!

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号