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过程工程学报 ›› 2015, Vol. 15 ›› Issue (4): 541-547.DOI: 10.12034/j.issn.1009-606X.215210CSTR: 32067.14.jproeng.215210

• 流动与传递 •    下一篇

新疆准东高碱煤流态化气化过程中碱金属的迁移特性

宋国良 齐晓宾 宋维健 吕清刚   

  1. 中国科学院工程热物理研究所 中国科学院工程热物理研究所 中国科学院工程热物理研究所 中国科学院工程热物理研究所
  • 收稿日期:2015-04-30 修回日期:2015-05-27 出版日期:2015-08-20 发布日期:2015-08-20
  • 通讯作者: 宋国良

Migration Characteristics of Alkali Metals in Zhundong High-alkali Coal from Xinjiang

SONG Guo-liang QI Xiao-bin SONG Wei-jian LU Qing-gang   

  1. Institute of Engineerig Thermophysics, Chinese Academy of Sciences Institute of Engineerig Thermophysics, Chinese Academy of Sciences Institute of Engineerig Thermophysics, Chinese Academy of Sciences Institute of Engineering Thermophysics, Chinese Academy of Sciences
  • Received:2015-04-30 Revised:2015-05-27 Online:2015-08-20 Published:2015-08-20
  • Contact: SONG Guo-liang

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被引次数

19

摘要： 在0.25 t/d高碱煤热化学转化热态实验台上对不同气化温度下神华准东高碱煤中碱金属的迁移分配特性进行了实验研究. 结果表明，煤中Na主要以水溶态形式存在，K主要以不溶态形式存在. 在不同气化温度下，底渣中的Na含量总体上高于循环灰中，气化温度越高对飞灰中Na, K的迁移分配特性影响越显著，Na, K迁移特性差异明显. 在850~1000℃气化条件下，煤中86.7%~93.1%的Na冷凝富集于飞灰中，主要以NaCl晶相形态存在.

关键词: 准东高碱煤, 流态化, 气化, 碱金属, 迁移, 分配

Abstract: The distribution and migration characteristics of alkali metals in Shenhua Zhundong high-alkali coal at different gasification temperatures were studied with a 0.25 t/d high alkali coal thermochemical conversion apparatus. The experimental results show that sodium in the coal exists mainly in a water soluble form, and potassium mainly in an insoluble form. At different gasification temperatures, sodium content of bottom ash is generally higher than that of the circulating ash, the higher the gasification temperature is, the greater the impact of gasification temperature on the fly ash alkali metal distribution characteristics is, the migration characteristics of sodium is significantly different from that of potassium. At the gasification temperatures from 850 to 1000℃, 86.7%~93.1% of sodium in the coal is condensated in fly ash, sodium in fly ash exists mainly in NaCl crystal phase form.

Key words: zhundong high-alkali coal, fluidization, gasification, alkali metal, migration, distribution

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