燃料化学学报2018，Vol.46Issue(4)：391-398,8.
燃烧放热对准东煤成灰过程中钠盐释放的影响
Effect of combustion heat on release and transformation of the sodium during Zhundong coal ash-forming process
摘要
Abstract
As a typical Zhundong coal, Wucaiwan coal was chosen as the object of the investigation. The combustion ash with coal sample and the reheated ash with ashing sample at 400 ℃ were prepared in a muffle furnace. K-type thermocouple was used to measure the temperature,XRF and XRD were used to investigate the composition of ash, and the sequential chemical extraction was used to examine the modes of occurrence of Sodium. The results show that the combustion ash and the reheated ash have marked differences in composition and melting points,sodium content in the reheated ash is higher than that in the combustion ash and the melting temperature of the reheated ash is lower than that in the combustion ash. With the increase of temperature, the total content of sodium decreases obviously, the water-soluble and ammonia-soluble sodium decreases rapidly, while the HCl soluble sodium increases first and then decreases and the insoluble sodium increases. The sodium released is mainly soluble. Heating temperature and time have an influence on the releasing of sodium, and the combustion reaction leads to the temperature on particle surface higher than surrounding temperature by 200℃, which is the main cause of releasing more sodium.关键词
准东煤/钠释放/灰成分/燃烧反应Key words
Zhundong coal/sodium release/ash composition/combustion reaction分类
化学化工引用本文复制引用
余圣辉,张成,张小培,周安鹂,许豪,方庆艳,陈刚..燃烧放热对准东煤成灰过程中钠盐释放的影响[J].燃料化学学报,2018,46(4):391-398,8.基金项目
The project was supported by National Natural Science Foundation of China(51676076),National Program of International Science and Technology Cooperation(2015DFA60410)and Graduates'Innovation Fund of HUST(5003120003).国家自然科学基金(51676076),国家国际科技合作专项(2015DFA60410)和华中科技大学自主创新研究基金(5003120003)资助 （51676076）
