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环境化学  2015 

燃煤烟气中汞形态分析的实验研究

Keywords: 烟气,,形态分布

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Abstract:

在一维煤粉燃烧炉台架上采用EPA推荐的OntarioHydro方法,测量了燃烧不同煤种排放的烟气中汞的形态分布情况.结果表明,烟气中汞以颗粒态和气态汞的形式存在.气态汞总量在9—23μg·Nm-3范围内,主要以单质汞的形式存在,占气态汞总量的52%—83%,而二价汞占17%—48%.飞灰中汞的浓度大大超过了底灰中汞的浓度,表明汞在飞灰中富集,在底灰中分散的行为.

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