煤添加高岭土燃烧控制有害微量元素的排放

Studies on the controlling hazardous trace element emission with Kaolinton during coal combustion.

通过在一维煤粉燃烧炉上进行无烟煤添加高岭土吸附剂的燃烧实验,研究了无烟煤及其燃烧产物中18种环境有害微量元素的含量和分布:计算了高岭土在不同燃烧工况条件下对每种环境有害微量元素的吸附率.结果表明,高岭土对环境有害微量元素Cd,Pb,Sb,Sn,Ba,Co,Be,Cr,Ni,Mo,Tl,V, U,Mn,Th具有不同的吸附作用,吸附率为11.6%～500%;吸附效率与元素种类、燃烧工况等因素有关,环境有害微量元素Cd,Pb,Zn,Sb,Ba,Co,Be,Cr, Ni,Mo,Tl,V, U,Mn,Th的吸附能力,分级燃烧比不分级燃烧吸附效果更好,总吸附率差为8.4%～481%.

The content and distribution of 18 environmental hazardous trace elements in the anthracite and its burnt products were studied with coal combustion test of anthracite added Kaolinton absorbent in one-dismensional boiler. The efficiencies of absorptions of Kaolinton to every environmental hazardous trace elements under different combustion conditions were calculated. Kaolinton possessed different absorptive action to environmental hazardous trace elements (Cd, Pb, Sb, Sn, Ba, Co, Be, Cr, Ni, Mo, Tl, V, U, Mn, Th), with absorption rate 11.6%~500%. The absorption efficiency was related to factors such as the kind of the element, combustion working conditions and so on. The air staged combustion was better than non-air staged combustion in the absorption ability on most of the environmental hazardous trace elements (Cd, Pb, Zn, Sb, Ba, Co, Be, Cr, Ni, Mo, Tl, V, U, Mn, Th), and its difference of all efficiency was 8.4%~481%.