摘要
分析燃煤电厂脱硫石膏中汞的化合物形态及其释放规律,对脱硫石膏的利用具有指导意义。利用X-射线荧光光谱仪(XRF)对2个火电厂石膏样品进行成分分析;为确定石膏中汞的热稳定性和形态分布,对各石膏样品和石膏滤渣样品进行2种加热方式的热处理,测定热处理前后各样品的失重率和汞含量。研究结果表明,2个电厂脱硫石膏汞的初始释放温度不同,分别为100℃和200℃;石膏及石膏滤渣样品的快速释放温度在200～400℃;所有样品在500℃时基本完成汞的释放;石膏滤渣中的总汞含量有所减少;脱硫石膏中含有的汞化合物主要有HgCl2和HgS。
Identifying the Hg species and release characteristics have guiding significanee for WFGD gypsum utilization. The X-ray flttoreseence spectrometry （XRF） was used to make the composition analysis of the two gypsum samples of Ihe coal-fired power plant. In order to determine the Ihermostability and species distribution of Hg in gypsum, the gypsum sample and gypsum residue sample were healed by two healing melhod and the gypsum weight loss and Hg contents were measured after heating treatment. The results show thai the Hg release hegan al 100 ℃ and 200℃ respectively tor the two gypsum samples： the rapid release oecurred al the tenlperalure helween 200 ℃ and 400 ℃ the ttg release fildshed al 500 ℃ for all the gypsum samples： the Hg in gypsum residue decreased and the main Hg compounds in WFGDwere HgCl2 and HgS.
出处
《中国电力》
CSCD
北大核心
2013年第9期145-149,共5页
Electric Power
基金
广东省省部产学研结合重点项目(2012B091000166)
关键词
燃煤电厂
湿法脱硫
脱硫石膏
汞
coal-fired plant： wet flue gas desulphurizalion （WFGD） desulphrized gypsum： merctnw
