热力发电2024，Vol.53Issue(1)：82-90,9.DOI:10.19666/j.rlfd.202309164
高碱煤热转化过程中钠的释出特性实验研究
Experimental study on sodium release characteristics during thermal conversion of high-alkali coal
摘要
Abstract
In order to study release characteristics of sodium during thermal conversion of high-alkali coals,the release characteristics of sodium in high-sodium coal and low-sodium coal were compared and analyzed through combustion experiments and pyrolysis experiments of raw coal and water-washed coal,so as to explore the release law changes of different forms of sodium in coal samples during combustion and the influence of atmosphere changes on sodium release.The results show that,during the combustion experiment,the release of sodium from high-alkali coal increases slowly at 300～500 ℃ and rapidly at 500～1 100 ℃,and the release of sodium from low-alkali coal increases rapidly at 300～500 ℃ and slowly at 500～1 100 ℃.It can be seen that,coal quality is one of the main reasons affecting sodium release,and sodium release will be greatly affected by the difference in coal composition.The release law of sodium during combustion and pyrolysis is basically the same,the sodium release rate changes slowly during the pyrolysis process,and is about 7.0％lower than that of the combustion process.The release characteristics of organic sodium and water-soluble sodium are different due to different release routes.关键词
高碱煤/钠释出/赋存形态/燃烧/热解Key words
high-alkali coal/sodium release/occurrence form/combustion/pyrolysis引用本文复制引用
廖伟辉,赵永椿,饶勇,吕兴城,阮志龙,傅勇强,李华鸿,陈端,马帅,姚斌..高碱煤热转化过程中钠的释出特性实验研究[J].热力发电,2024,53(1):82-90,9.基金项目
国家重点研发计划项目(2022YFB4202000)National Key Research and Development Program(2022YFB4202000) （2022YFB4202000）
