水冷壁气流床气化炉熔渣形态分析  

Analysis of Slag Morphology in Membrane Wall Entrained-Flow Gasifier

作　　者：侯国君[1] 梁钦锋[1] 孙立[1] 许建良[1] 刘海峰[1] 

机构地区：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海200237

出　　处：《燃烧科学与技术》2013年第4期377-381,共5页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB227005);国家自然科学基金资助项目(21106046;20906020)

摘　　要：基于实验室水冷壁气流床气化炉,采用神府气化灰渣干法进料、柴油伴烧的方法研究了不同气化温度下自然冷却粗渣的形态、密度及孔隙率的变化规律.利用ImageJ软件测量了熔渣的平均长度和宽度;采用水浸渍法测定了熔渣的密度,计算出熔渣孔隙率.结果表明:气化温度较低时,粗渣以扁球状渣粒居多,气化温度较高时,粗渣以条状渣居多;随着气化温度升高,粗渣颗粒平均质量和平均长度均逐渐增加,平均宽度先增加后略有减小,长宽比值与气化温度符合指数关系;粗渣的孔隙率随气化温度升高逐渐减小.The characteristics of nature-cooled slag at different gasification temperatures were studied in a lab-scale membrane wall entrained-flow gasifier using dry-feed and diesel combustion method. The average length and width of coarse slag were measured using ImageJ. The density and porosity of slag were investigated using immersion method. The result showed that the number of spheroid-type slag was reduced when the gasification tempera^tre was low; the number of strip-type slag was increased when the gasification temperature was high. The average length and the aver- age mass of coarse slag gradually increased and the aspect ratio fitted the exponential relationship with the gasification temperature. When the gasification temperature was lower than the flow temperature, the average width increased first and then decreased. When the gasification temperature increased, the porosity of coarse slag decreased.

关 键 词：水冷壁气化炉 自然冷却 熔渣形态 孔隙率 

分 类 号：TQ54[化学工程—煤化学工程]