摘要
为了解决褐煤热萃取率低的问题,以酸碱作溶剂对原煤进行预处理,在操作温度为380℃、常压、溶煤比为10∶1的工艺条件下,对预处理后的原煤进行热萃取反应制备超纯煤,考察了不同酸碱溶剂对热萃取率的影响。结果表明:与原煤相比,经不同种类的酸碱溶剂处理后褐煤的热萃取率均得到了不同程度的提高,其中经氢氧化钾预处理后褐煤的热萃取率最高,达到66.5%;红外光谱表明,采用酸碱溶剂预处理原煤,可以有效破坏煤的分子结构,使无机矿物质盐裸露在外,也使有机官能团得到充分暴露。因此,通过预处理手段可以获得更高的超纯煤收率,减少配煤炼焦行业中优质煤的使用量。
In order to solve the problem of low thermal extraction rate of lignite,the raw coal is pretreated with acid and alkali as solvent,and then the pretreated raw coal is subjected to thermal extraction reaction to prepare ultra-pure coal under the process conditions of operating temperature 380℃,normal pressure and coal dissolution ratio of 10∶1.The effects of different acid and alkali solvents on thermal extraction rate are investigated.The results show that compared with raw coal,the thermal extraction rate of lignite treated with different kinds of acid-base solvents has been improved to different degrees,and the thermal extraction rate of lignite pretreated with potassium hydroxide is the highest,reaching 66.5%.Infrared spectrum shows that pretreatment of raw coal with acid-base solvent can effectively destroy the molecular structure of coal,expose inorganic mineral salts and fully expose organic functional groups.Therefore,higher yield of ultra-pure coal can be obtained through pretreatment,and the usage of high-quality coal in coal blending and coking industry can be reduced.
作者
叶阳天
张文娜
崔咏梅
陈曦
郭颖
贾梦淑
许永权
YE Yangtian;ZHANG Wenna;CUI Yongmei;CHEN Xi;GUO Ying;JIA Mengshu;XU Yongquan(School of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;College of Chemical Engineering,Shijiazhuang University,Shijiazhuang,Hebei 050035,China)
出处
《河北科技大学学报》
CAS
2019年第4期366-370,共5页
Journal of Hebei University of Science and Technology
基金
河北省自然科学基金(B2016208014)
河北省高等学校科学技术研究项目(ZD2016088)
关键词
煤炭能
褐煤
预处理
热萃取
红外光谱
coal energy
lignite
pretreatment
thermal extraction
infrared spectrum
