我国煤中汞含量水平及洗选过程汞流向分析  

Analysis of mercury content level in coal and mercury migration during washing process in China

作　　者：唐翠梅 TANG Cuimei(BCEG Environmental Remediation Co.,Ltd.,Beijing 100015,China)

机构地区：[1]北京建工环境修复股份有限公司,北京100015

出　　处：《能源环境保护》2020年第2期82-86,共5页Energy Environmental Protection

摘　　要：介绍了我国煤中汞含量与分布特征、煤中汞的赋存形态,分析了汞释放对环境的影响以及汞的脱除与控制技术。结果表明:我国(华南)晚三叠世(T3)煤中汞含量最高,平均含量为0.26μg/g;贫煤和无烟煤中汞含量最高,平均含量都超过0.20μg/g。含汞较高的晚三叠世、晚二叠世煤田主要分布于华南各地;多数煤中汞含量在0.300μg/g以下,但华南的江西、广西、贵州等地煤中汞含量总体水平较高;汞的赋存形态可分为有机结合态和无机结合态,煤中汞的控制方法可分为利用前脱汞、利用(燃烧)后脱汞和过程中汞形态转化。提出了煤炭洗选过程汞分布、脱除率和汞平衡等计算公式,指出了煤炭洗选过程中汞迁移行为的主要影响因素。The content,distribution characteristic and occurrence form of mercury in coal in China were introduced.Furthermore,the impact of mercury release on environment,removal and control technologies of mercury were analyzed.The results show that the average mercury content of late Triassic(T3)coal in south China is 0.26μg/g,which is the highest among the coal from all the mining areas in China.The average mercury contents of lean coal and anthracite are both above 0.20μg/g and higher than other kinds of coal.The late Triassic and late Permian coalfield,which contain relatively high mercury content,mainly distribute in south China.The mercury contents of most coal are below 0.30μg/g,however,the ones of coal in south China(such as Jiangxi,Guangxi and Guizhou)are at a high level.The occurrence forms of mercury can be divided into organic and inorganic combined states.The mercury in coal can be controlled by mercury removal before use,mercury removal after use(combustion)and transformation of mercury occurrence forms during use.The calculation formulas of mercury distribution,removal rate and mercury balance during coal washing process were put forward.The main impact factors affecting the mercury migration behavior in coal washing process were also pointed out.

关 键 词：赋存形态 煤炭洗选 重介工艺 跳汰工艺 汞迁移 汞平衡 脱汞率 

分 类 号：X752[环境科学与工程—环境工程]