Mercury speciation and emissions from coal combustion in Guiyang, Southwest China.
Mercury speciation and emissions from coal combustion in Guiyang, Southwest China.
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DOI：
10.1016/j.envres.2007.03.008
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发表时间：
2007-10
影响因子：
8.3
通讯作者：
Shunlin Tang;Xinbin Feng;J. Qiu;G. Yin;Zaichan Yang
中科院分区：
文献类型：
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作者：
Shunlin Tang;Xinbin Feng;J. Qiu;G. Yin;Zaichan Yang
尽管中国已被认为是最大的人为汞排放源之一，但迄今为止，对汞的形态、燃烧产生的汞排放以及中国排放控制装置对汞的捕获的实际测量非常有限。针对贵阳市汞形态的测定，采用安大略Hytro法对无控制装置的中小型工业蒸汽燃煤锅炉（10- 30 t/h）、湿法脱硫的中小型工业蒸汽燃煤锅炉和电除尘器的大型燃煤锅炉烟气中汞形态进行了研究。得到了贵阳市2003年和全省1986 ~ 2002年三种有代表性的燃煤汞排放因子和汞排放估算值。贵阳市燃煤汞排放量为1898 kg，其中36%来自电厂，41%来自工业燃煤，23%来自生活用户，汞的排放量分别为267 kg、813 kg和817 kg。贵州省汞排放量从1986年的5.8t急剧增加到2002年的16.4t。随着国家西部大开发战略的实施，预计到2015年全省燃煤汞排放量约为32 t。
Although China has been regarded as one of the largest anthropogenic mercury emission source with coal combustion, so far the actual measurements of Hg species and Hg emissions from the combustion and the capture of Hg in Chinese emission control devices were very limited. Aiming at Hg mercury species measurements in Guiyang, the capital city of Guizhou province in Southwest China, we studied flue gases of medium-to-small-sized industrial steam coal-firing boiler (10–30t/h) with no control devices, medium-to-small-sized industrial steam coal-firing boiler with WFGD and large-scale coal combustion with ESPs using Ontario Hytro method. We obtained mercury emission factors of the three representative coal combustion and estimated mercury emissions in Guiyang in 2003, as well as the whole province from 1986 to 2002. Coal combustion in Guiyang emitted 1898kg mercury to the atmosphere, of which 36% Hg is released from power plants, 41% from industrial coal combustion, and 23% from domestic users, and 267kg is Hgp, 813kg is Hg2+and 817kg is Hg0. Mercury emission in Guizhou province increased sharply from 5.8t in 1986 to 16.4t in 2002. With the implementation of national economic strategy of China's Western Development, the annual mercury emission from coal combustion in the province is estimated to be about 32t in 2015.