化工学报2017，Vol.68Issue(10)：3693-3707,15.DOI:10.11949/j.issn.0438-1157.20170169
煤热解过程分析与工艺调控方法
Analysis and control methods of coal pyrolysis process
摘要
Abstract
Coal pyrolysis is an efficient route for the clean utilization of low-rank coals due to its producing scarce gas and oil resources. This paper focuses on the key technical problems of the unmanageable yield and quality of tar and the high dust content in tar. From coal pyrolysis mechanism, the types and occurrence conditions of volatile secondary reactions and the major influence factors on pyrolysis are discussed in detail. Combining the application of coal pyrolysis technology, it is summarized that gas phase secondary reactions of volatiles are responsible for the decrease of tar yield. Meanwhile, the coal particle fragmentation mechanism and the source of dust during pyrolysis are analyzed. Based on previous research results, we propose that the control methods for coal pyrolysis process, such as changing volatile flow direction from high temperature zone to low temperature zone, coupling pyrolysis with gasification andin situ tar upgrading and dust removal, which can inhibit heavy tar formation, improve light tar content and reduce dust content in tar, and thus realize oriented coal pyrolysis.关键词
煤/热解/二次反应/焦油提质/除尘/调控/传热/气化Key words
coal/pyrolysis/secondary reaction/tar upgrading/dust removal/control/heat transfer/gasification分类
化学化工引用本文复制引用
陈兆辉,高士秋,许光文..煤热解过程分析与工艺调控方法[J].化工学报,2017,68(10):3693-3707,15.基金项目
国家重点研发计划项目(2016YFB0600304). Foundation item:supported by the National Key Research and Development Program of China (2016YFB0600304). （2016YFB0600304）
