电厂燃煤中有害微量元素的燃烧迁移行为研究

Burning and Migration Behavior of Trace Elements of Coal Used in Power Plant

采用仪器中子活化和电感耦合等离子体原子发射光谱法对鄂尔多斯盆地北缘石嘴山电厂、上湾电厂、大柳塔电厂和海勃湾电厂的原煤、灰渣、飞灰、超细飞灰进行了有害微量元素含量的测定 ,研究了 As,Pb,Hg,Cd,Cr,Se,Mn,Ni,Co,U,Th,Be,Sb,Br等元素在粉煤燃烧过程中的散逸、迁移行为 ,揭示了他们在燃煤过程中在气态产物和固态产物 (底灰、飞灰、超细飞灰 )中的分配富集特征 ,分析了这些元素的环境效应 .结果表明 :对于挥发性元素 Hg和半挥发性元素 As,其富集系数由大到小为 :超细飞灰 >飞灰 >底灰 .

Some harmful trace elements in raw coal, ash, flyash, and superfine flyash from Shizuishan, Shangwan, Daliuta and Haibowan power plants were tested using INAA and ICP AES methods. Burning and migration behavior and its environment effect of As, Pb, Hg, Cd, Cr, Se, Mn, Ni, Co, U, Th, Be, Sb, Br were researched and their distribution and enriching characteristics in coal, bottom ash, flyash and superfine flyash were analyzed. The result shows that for elements Hg and As, the enriching coefficients, from great to small, are in the order of superfine ash, flyash, bottom ash.