酸洗处理对典型高硫煤性质的影响研究  

Effect of Chemical-Related Acid Leaching on Characteristics of Typical High Sulfur Coal

作　　者：黄芳[1] 陈颖[1] 辛善志[1] 米铁[1] HUANG Fang;CHEN Ying;XIN Shanzhi;MI Tie(Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,Jianghan University,Wuhan 430056,Hubei,China)

机构地区：[1]江汉大学工业烟尘污染控制湖北省重点实验室

出　　处：《江汉大学学报（自然科学版）》2020年第1期5-15,共11页Journal of Jianghan University：Natural Science Edition

基　　金：湖北省教育厅科研计划指导性项目(B2018253)

摘　　要：研究了煤化学处理中的酸洗处理对煤性质的影响。典型煤(铜川高硫煤)在几种酸溶液中浸洗后,对得到的煤样进行有机质和无机质特性分析、热化学及动力学分析,发现硝酸易与煤中有机大分子发生硝化反应,导致煤中有机大分子分解成有机小分子。气质联用分析显示硝酸较其他酸更易断裂煤中不稳定大分子结构,可能是硝酸与煤中含硫及铁类矿物反应形成酸溶性物质而降低其含量。大部分酸液对钠、钙及镁等的脱除效果较为明显,而氢氟酸对硅、铝、钾等脱除效果明显。氢氟酸液洗煤的活化能较原煤高,硝酸及硝酸盐酸混液酸洗的煤样反应活化能明显下降,即这两种酸液洗后的煤样更易热解燃烧。This study mainly investigated the effect of the common acid leaching process on coal(Tongchuan high sulfur coal) characteristics.Several acid solutions were used in chemical leaching process.Organic and inorganic characteristics, thermochemical and kinetic analysis were carried out in the research.It was found that nitric acid easilyreacted with coal organic macromolecules and decomposed them into smaller molecules.The GC-MS analysis also showed that the nitric acid fractured instable coal macromolecular structure more easily compared to other acids.Nitric acid could react with sulfur and iron containing material to form acid soluble substances.Most acid solutions could significantly reduce the content of sodium, calcium and magnesium.However, hydrofluoric acid could effectively reduce silicon, aluminum and potassium.Hydrofluoric acid leaching process caused the activation energy of coal becoming higher than raw coal.While nitric acid, nitric acid and hydrochloric acid mixed leaching process caused coal sample reaction activation energy decreasing obviously;these suggested that the two coal samples after acid leaching are more likely to pyrolyze and combust.

关 键 词：高硫煤 酸洗 脱灰脱硫 煤特性 动力学分析 

分 类 号：TK227.3[动力工程及工程热物理—动力机械及工程]