Migration Characteristics of Alkali Metals in Zhundong High-alkali Coal from Xinjiang
SONG Guo-liang QI Xiao-bin SONG Wei-jian LU Qing-gang
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
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.
宋国良 齐晓宾 宋维健 吕清刚. 新疆准东高碱煤流态化气化过程中碱金属的迁移特性[J]. 过程工程学报, 2015, 15(4): 541-547.
SONG Guo-liang QI Xiao-bin SONG Wei-jian LU Qing-gang. Migration Characteristics of Alkali Metals in Zhundong High-alkali Coal from Xinjiang. Chin. J. Process Eng., 2015, 15(4): 541-547.
2015, Vol. 15 
