Application of powdered activated carbon coating to fabrics in a hybrid filter to enhance mercury removal

论文摘要

Elemental mercury（Hg0） is predominant constituent of flue gas emitted from coal-fired power plants. Adsorption has been considered the best available technology for removal of Hg0 from flue gas. However, adsorbent injection increases the amount of ash generated. In the present study, powdered activated carbon（PAC） was coated on polytetrafluoroethylene/glass fiber filters to increase Hg0 removal while concurrently reducing the amount of ash generated. The optimal PAC coating rate was determined in laboratory experiments to ensure better Hg0 removal with low pressure drop. When PAC of particle size less than 45 μm was used, and the areal density was 50 g/m2, the pressure drop remained under 30 Pa while the Hg0 removal efficiency increased to 15.8% from4.3%. The Hg0 removal efficiency also increased with decrease in filtration velocity. The optimal PAC coating rate was applied on a hybrid filter（HF）, which was combined with a bag filter and an electrostatic precipitator in a single chamber. Originally designed to remove fine particulates matter, it was retrofitted to the flue gas control device for simultaneous Hg0 removal. By employing the PAC coating, the Hg removal efficiency of the HF increased to 79.79% from 66.35%. Also, a temporary reduction in Hg removal was seen but this was resolved following a cleaning cycle in which the dust layer was removed.

论文目录

文章来源

类型: 期刊论文

作者: Jin-Ho Sung,Seung-Ki Back,Eun-Song Lee,Ha-Na Jang,Yong-Chil Seo,Youn-Suk Kang,Myong-Hwa Lee

来源: Journal of Environmental Sciences 2019年06期

年度: 2019

分类: 工程科技Ⅰ辑,工程科技Ⅱ辑

专业: 环境科学与资源利用,动力工程,电力工业

单位: Department of Environmental Engineering, Yonsei University,Department of Environmental Engineering, Kangwon National University

基金: supported by the Korea Ministry of Environment as “The Eco-Innovation Project” (2013000110002),“The Environmental Health Action Program”(2015001370001),“Knowledge-based Environmental Service (Waste to Energy and Recycling) Human Resource Development Project”

分类号: X773

页码: 58-65

总页数: 8

文件大小: 614K

下载量: 66

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