新疆原煤中汞含量分布及燃煤大气汞排放量估算

通过对新疆不同地区45个煤矿进行采样,分析新疆煤炭汞含量的空间分布特征,同时对燃煤大气汞释放量进行估算,确定新疆煤炭消费对大气汞排放的贡献。结果表明新疆原煤中汞含量处于较低水平,平均含量为5.43×10-2 mg/kg,远小于我国其他地区,新疆原煤汞含量空间分布具有明显的地域差异性,最高点位于奇台地区,原煤汞含量为17.05×10-2mg/kg,最低点位于塔城地区,原煤汞含量为2.03×10-2 mg/kg,总体呈北疆地区高南疆地区低的特点。初步估算显示,2008年新疆各行业燃煤大气汞排放总量为2039.02kg,其中民用燃煤汞排放量约占5.13%,远小于14%～15%的全国平均值,在全国处于较低水平。

The Mercury Contents in Raw Coals from Xinjiang Uygur Autonomous Region and the Estimation of Mercury Emission from Coal Combustion

Spatial distribution features and the proportion of mercury emission from civil coal consumption to the whole emission into atmosphere were analyzed.Coal from Xinjiang 45 coal mines was sampled,and mercury contents as well as the mercury emission from civil coal combustion were estimated.The results show that mercury content in Xinjiang coals was lower with an average value 5.43×10-2 mg/kg,compared with other provinces in china;spatial distribution displayed an obvious geographical diversity.Mercury contented in coals from northern Xinjiang was higher than that from the south such as the highest(17.05×10-2 mg/kg) located in Qitai,while the lowest(2.03×10-2 mg/kg) located in Tacheng region.The calculated results show that,in 2008,the total mercury emission in different sectors in Xinjiang was 2039.02 kg,of which mercury discharged from civilian coal combustion accounted for 5.13%,which was far below the national level.