摘要
以煤液化油衍生油为溶剂,在热萃取装置上研究了大唐胜利褐煤等低阶煤的热萃取性能,考察了热萃取温度、热萃取时间、溶煤比、溶剂类型和煤种等因素对煤热萃取性能的影响,同时对大唐胜利褐煤在热萃取过程中氧元素的脱除情况进行了研究.结果表明:煤的热萃取率随温度升高而明显增加,由340℃时的18.7%(daf)增加到430℃时的59.5%(daf),而固体热萃取物回收率在390℃时达到最高值32.4%(daf),反应停留时间以60min为宜,溶剂与煤的合适质量比为5∶1,在煤液化加氢循环溶剂中具有较高的热萃取率.热萃取过程中大唐胜利5#煤中氧元素的脱除率可达23%(daf).
Thermal extraction of some low rank coals was studied on thermal extraction device using coal derived liquids. The influences of temperature, residence time, solvent-coal ratio, solvent and coal rank on thermal extraction yield were studied. Furthermore, the deoxidiza- tion yield of coal in the process of thermal extraction was investigated as well. The results show that the thermal extraction yield of coal increased from 18.7% （daf） at 340 ℃ to 59.5% （daf） at 430 ℃. However, the maximal the solid extract yield 32.4% （daf） at 390 ℃ can be obtained . The optimal residence time and ratio of solvent to coal was 60 rain and 5 ： 1 respectively. Using the coal liquefaction recycle solvent, higher coal thermal extraction yield was obtained. 23 % oxygen content of Datang Shengli No. 5 lignite was removed during the processing of thermal extraction at 390 ℃.
出处
《煤炭转化》
CAS
CSCD
北大核心
2009年第1期34-39,共6页
Coal Conversion
基金
国家高技术研究发展计划(863)项目(2007AA05Z322)
煤炭科学研究总院青年创新基金资助项目(2006QN36)
关键词
低阶煤
热萃取
脱氧
煤液化衍生
low rank coals, thermal extraction, deoxygenation, coal derived liquids
