| 燃煤电厂污染控制单元对汞释放的控制作用 |
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| 引用本文： | 钟丽萍,曹晏,李文英,潘伟平,谢克昌.燃煤电厂污染控制单元对汞释放的控制作用[J].燃料化学学报,2010,38(6):641-646. |
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| 作者姓名： | 钟丽萍 曹晏 李文英 潘伟平 谢克昌 |
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| 作者单位： | 1.Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province,;
Taiyuan University of Technology, Taiyuan 030024, China;
2.Institute for Combustion Science and Environmental Technology, West Kentucky University, Bowling Green, Kentucky 42101,USA |
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| 基金项目： | 国家自然科学基金西部重大计划重点项目，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 采用Ontario-Hydro方法和半连续汞排放监测仪,研究了电厂现有污染控制单元,选择还原催化(SCR)、静电除尘(ESP)、烟气脱硫(FGD)对烟气中汞的脱除能力。实验结果表明,在SCR催化剂V2O5/TiO2的作用下,50%以上的Hg0被氧化成Hg2+,但SCR本身不能控制汞释放量;ESP通过对飞灰的捕获直接降低了烟气中颗粒汞的比例;FGD依据Hg2+易溶于水的性质,通过吸收烟气中的Hg2+控制总汞的释放,部分Hg2+和FGD系统中的亚硫酸盐等发生反应,被还原为Hg0,发生了二次汞释放问题,造成脱汞整体效率降低。研究中考察了SCR开闭两种状态下整个系统汞的释放量,发现SCR单元启用时,由于烟气中Hg2+的浓度较高,二次汞释放现象更严重。
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| 关 键 词： | style="font-size: 9pt line-height: 燃煤电厂" target="_blank">150%">燃煤电厂 烟气 选择还原催化单元 静电除尘单元 烟气脱硫单元 汞释放 |
| 收稿时间： | 1 April 2010 |
| 修稿时间： | 26 May 2010 |
Effect of the existing air pollutant control devices on mercury emission in coal-fired power plants |
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| ZHONG Li-ping,CAO Yan,LI Wen-ying,PAN Wei-ping,XIE Ke-chang.Effect of the existing air pollutant control devices on mercury emission in coal-fired power plants[J].Journal of Fuel Chemistry and Technology,2010,38(6):641-646. |
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| Authors: | ZHONG Li-ping CAO Yan LI Wen-ying PAN Wei-ping XIE Ke-chang |
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| Institution: | a Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China;b Institute for Combustion Science and Environmental Technology, West Kentucky University, Bowling Green, Kentucky 42101, USA |
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| Abstract: | Ontario-Hydro method(OHM) and semi-continuous mercury emission(SCEM) were used to study the effects of the existing air pollutant control devices on mercury emission in coal-fired power plants.The results indicate that more than 50% of Hg0 is oxidized into Hg2+ by selective catalytic(V2O5/TiO2) reduction(SCR),but SCR itself couldn't control mercury emission.The collection of fly ash by electrostatic precipitator(ESP) directly lowers the proportion of particle mercury in the flue gas.For water soluble Hg2+,w... |
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| Keywords: | coal-fired power plant flue gas selective catalytic reduction electrostatic precipitator flue gas desulphurization mercury emission |
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