气流床气化炉内气体浓度的分布规律  

Gas Concentration Distribution in an Entrained-Flow Gasifier

作　　者：牛苗任[1] 王增莹[1] 张志文[1] 梁钦锋[1] 于广锁[1] 王辅臣[1] 于遵宏[1] 

机构地区：[1]华东理工大学洁净煤技术研究所,上海200237

出　　处：《燃烧科学与技术》2009年第1期66-73,共8页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2004CB217705);教育部新世纪人才支持计划资助项目(NCET-05-0415);上海市曙光计划资助项目(06SG34);长江学者和创新团队发展计划资助项目(IRT0620)

摘　　要：常压条件下，在两喷嘴对置热模试验平台上，对含碳化合物（柴油）的气化过程进行了试验研究．在不同的氧油比条件下，用水冷不锈钢取样探头在炉内3个轴向位置和合成气出口位置取样，气体经预处理系统后，用质谱仪分析主要气体（O2、CO2、CO、H2和CH4）的体积分数．研究了不同试验条件下的气化炉升温过程，以及稳定工况下气化炉内不同径向位置气体分布规律．结果表明，喷嘴平面附近，升温速率以1000℃为界限，明显地分为两个线性区，CH4体积分数可作为指示气化炉温度的指标．最佳氧油比为0．90—1．20m3／kg左右．On a laboratory-scale testing platform of impinging entrained-flow gasifier with two opposed burners, the detailed measurements of gas concentration distribution have been performed for carbonaceous compound （diesel oil） under atmospheric pressure. At different O2/fuel ratios, gas samples are collected at three axial positions and the syngas exit position with stainless steel water-cooled probes, and the concentrations of the major gases （O2, CO2, CO, H2 and CH4） are analyzed with a mass spectrometry. Both the heating-up process and the distribution law at different radial positions under a stable operating state are studied. The results clearly illustrate that 1 000℃ is the threshold temperature of heating-up process near the burner plane, and that the methane content in the syngas is the best indicator for monitoring the temperature of a gasifier. The optimal O2/fuel ratio is about 0.90-1. 20 m^3/kg. These data are used to clarify the mixing and reaction characteristics within the reactor, to give an insight into the combustion process and to provide a database for evaluating predictive mathematical models.

关 键 词：气化 气流床气化炉 气体浓度分布 

分 类 号：TQ546.2[化学工程—煤化学工程]