准东煤中碱金属的赋存形式及其在燃烧过程中的迁移规律实验研究

刘敬 王智化 项飞鹏 黄镇宇 刘建忠 周俊虎 岑可法

引用本文: 刘敬, 王智化, 项飞鹏, 黄镇宇, 刘建忠, 周俊虎, 岑可法. 准东煤中碱金属的赋存形式及其在燃烧过程中的迁移规律实验研究[J]. 燃料化学学报, 2014, 42(3): 316-322. shu
Citation:  LIU Jing, WANG Zhi-hua, XIANG Fei-peng, HUANG Zhen-yu, LIU Jian-zhong, ZHOU Jun-hu, CEN Ke-fa. Modes of occurrence and transformation of alkali metals in Zhundong coal during combustion[J]. Journal of Fuel Chemistry and Technology, 2014, 42(3): 316-322. shu

准东煤中碱金属的赋存形式及其在燃烧过程中的迁移规律实验研究

    通讯作者: 王智化(1977-),男,教授,主要从事煤粉高效低污染燃烧、多种污染物一体化协同脱除等,E-mail:wangzh@zju.edu.cn
  • 基金项目:

    国家重点基础研究发展规划(973计划,2012CB214906)。 (973计划,2012CB214906)

摘要: 对新疆煤采用三步化学提取实验(蒸馏水洗、醋酸铵洗、稀盐酸洗)以分析其碱金属赋存特性,对水溶的阴离子进行了离子色谱分析。分别检测了在不同温度、不同停留时间下准东煤灰的碱金属量,并用Factsage软件模拟该煤灰中碱金属的析出形式。结果表明,煤中的钠主要是水溶钠,钾主要以不可溶钾存在,水溶碱金属主要以水合离子形式的氯化物存在。准东煤中碱金属在400~600 ℃析出最快,主要是水溶态碱金属的释放,碱金属的释放主要发生在燃烧后期。灰中碱金属在高温下会与烟气中的成分发生反应,主要产物是氯化物以及氢氧化物。在700 ℃钠对准东煤中低温共融物的形成有很大贡献。

English

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  • 收稿日期:  2013-09-03
  • 网络出版日期:  2013-11-25
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