摘要
建立了一个预测高温空气气化的卵石床气化炉性能的数学模型。建模采用"小室模型"的方法,将气化炉沿纵轴分段,建立起各小室内气体成份,固体和碳质量平衡以及总体能量平衡。模型详细考虑了气固流动过程以及包括水煤气反应、CO2还原、变换反应等10多种均相和异相反应在内的动力学反应过程。由于卵石床气化炉的结构比较特殊,在建模过程中将气化炉分为喷流床段和卵石床段,分别用不同的方法考虑在两个段中的停留时间,从而能够在计算有限停留时间内气化炉中反应的情况。该模型的特点是能够反映气化炉的几何尺寸和结构对各主要参数的影响,并计算有限的停留时间内卵石床气化炉内的主要参数及其分布。通过与实验数据比较,模型的结果具有一定的定量准确性。
This article establishes a mathematical model to predict the performance of high temperature air pebble bed gasifier. Cell model is used to set up the total energy balance and mass balance of solid flow, carbon flow and eight gas components. More than ten chemical reactions are considered in this model. In order to predict the chemical composition of the gasifier before chemical balance is achieved, different methods for calculating the residence time are applied to different section of the gasifier to deal with the special structure. This model can reflect the influence of the gasifier's geometry and structure. Also can it predict the distribution of most of the important operation parameters in the gasifier. The model is reliable as compare with the experimental data.Figs 9, tables 6 and refs 7.
出处
《动力工程》
CSCD
北大核心
2003年第5期2652-2659,共8页
Power Engineering
基金
国家重点基础研究发展规划资助项目(G2000026309)
关键词
卵石床
高温空气气化
数学模型
pebble bed gasifier
high temperature air gasification
mathematical model
