[1]江贻满,段钰锋,杨祥花,等.ESP飞灰对燃煤锅炉烟气汞的吸附特性[J].东南大学学报(自然科学版),2007,37(3):436-440.[doi:10.3969/j.issn.1001-0505.2007.03.017]
 Jiang Yiman,Duan Yufeng,Yang Xianghua,et al.Adsorption characterization of coal fired flue gas mercury by ESP fly ashes[J].Journal of Southeast University (Natural Science Edition),2007,37(3):436-440.[doi:10.3969/j.issn.1001-0505.2007.03.017]
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ESP飞灰对燃煤锅炉烟气汞的吸附特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第3期
页码:
436-440
栏目:
能源与动力工程
出版日期:
2007-05-20

文章信息/Info

Title:
Adsorption characterization of coal fired flue gas mercury by ESP fly ashes
作者:
江贻满 段钰锋 杨祥花 杨立国 王运军
东南大学洁净煤发电及燃烧技术教育部重点实验室, 南京 210096
Author(s):
Jiang Yiman Duan Yufeng Yang Xianghua Yang Liguo Wang Yunjun
Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
飞灰 汞吸附 孔隙结构 表面利用率
Keywords:
fly ash mercury adsorption pore structure surface utilization rate
分类号:
TK224.93
DOI:
10.3969/j.issn.1001-0505.2007.03.017
摘要:
用氮气(N2)等温吸附(77 K)测量了一座600 MW煤粉锅炉电厂静电除尘器(ESP)各个电场飞灰的比表面积、孔径、孔比表面积、孔容积和孔分布,采用扫描电镜(SEM)和X射线能谱分析仪(EDX)分析了飞灰颗粒表面结构和化学组分.结果表明,颗粒粒径越小,比表面积越大,飞灰的汞吸附趋于增加.飞灰含碳量与汞含量呈正相关关系,亚微米级颗粒物对汞的吸附不仅与其比表面积有关,而且与其比表面积的利用率有关.静电除尘过程中飞灰的孔隙结构在不断地变化和发展,孔分布越宽越有利于对汞的吸附,微孔越发达且可利用率越高,越有利于汞的被吸附.
Abstract:
Fly ash samples were collected from the hopper of each electric field of an electrostatic precipitator(ESP)of a 600 MW pulverized coal boiler. The particle specific area, pore size, pore specific surface area, pore volume and pore distribution of the ash samples were measured via nitrogen adsorption at 77 K. The morphologies and chemical compositions of ash samples were analyzed by scanning electron microscope(SEM)and energy dispersive X-ray(EDX)detector respectively. The results show that the smaller the particle diameter, the bigger the specific surface areas and thus the more mercury adsorbed by fly ash. There is a positive correlation between carbon content and mercury content. The mercury adsorption on the micron fines is related not only to its specific surface area, but also to its surface utilization rate. The pore structures of fly ashes in different ESP electric fields are diversified. Wider pore distribution is beneficial to mercury adsorption. Developed pores with high surface utilization rate can adsorb more mercury.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2002CB211604, 2006CB200301)、985教育部“振兴行动计划”一期联合资助项目.
作者简介: 江贻满(1982—),男,硕士生; 段钰锋(联系人),男,博士,教授,博士生导师, yfduan@seu.edu.cn.
更新日期/Last Update: 2007-05-20