文献类型：期刊文献

中文题名：水煤浆气化炉内飞灰的形成机理

英文题名：Ash formation mechanisms during gasification in coal-water slurry gasifier

作者：池国镇[1];郭庆华[1];龚岩[1];张婷[1];梁钦锋[1];于广锁[1]

机构：[1]华东理工大学煤气化教育部重点实验室,上海200237

年份：2012

卷号：63

期号：2

起止页码：584

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20120814790416);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金项目(21006026);国家重点基础研究发展计划项目(2010CB227004)~~

语种：中文

中文关键词：煤气化;飞灰形成;矿物转化

外文关键词：coal gasification; ash formation mechanism; mineral transformation

摘要：基于实验室规模的多喷嘴对置式水煤浆气化炉,利用SEM、马尔文激光粒度仪和XRD表征气化炉内飞灰的粒径分布和组成,并分析了气化炉内飞灰的形成机理。结果表明,喷嘴平面处飞灰与气化炉出口处飞灰的粒径分布及化学组成存在显著差异,不同气化阶段飞灰的形成机理也不同。气化燃烧阶段飞灰的形成机理为部分固定碳燃烧和外在矿物转化,而在焦炭气化反应阶段,飞灰的形成机理为焦炭破碎和内在矿物释放及转化。
Ash formation during coal gasification was investigated based on bench-scale OMB gasifier.Particle size and composition of the initial minerals and the resulting fly ash were measured by SEM,XRF,XRD and Malvern Laser Particle Size Analyzer.The results showed that particle size distribution and composition of fly ash were significantly different between fly ash at impinging zone and fly ash at gasifier outlet.Particle size distribution of fly ash at impinging zone was slightly finer than that of raw coal,composition of fly ash at impinging zone was quartz,calcite and FeS.Particle size distribution of fly ash at gasifier outlet dramatically decreased compared to that of fly ash at impinging zone,and composition of fly ash at gasifier outlet was quartz,calcite,FeS,mullite,anorthite,gehlenite and calcium oxide.Ash formation mechanisms at different gasification stages were also different.Part of fixed carbon combustion and excluded mineral transformation were the mechanisms of ash formation at the combustion stage,char fragmentation and included mineral liberation and transformation were the mechanisms of ash formation at the char gasification stage.