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化工学报  2012 

煤灰熔融黏温特性及对气流床气化的适应性

DOI: 10.3969/j.issn.0438-1157.2012.10.034, PP. 3243-3254

Keywords: 煤灰,CaO,Fe2O3,黏温特性,FactSage

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Abstract:

以21个中国典型煤样为研究对象,根据煤灰中CaO和Fe2O3含量,将之分为低钙低铁类、中钙中铁类、中钙高铁类、高钙低铁类、高钙高铁类等类别。利用高温黏度计测量煤灰熔渣黏温特性,并利用计算软件FactSage对煤灰熔融状态进行热力学平衡计算,研究了液相熔渣及固体矿物质结晶与熔渣黏度的关系,分析整理了煤灰最初硅铝比(SiO2/Al2O3)、固体结晶物以及液相熔渣组成3个因素对煤灰熔融特性和熔渣黏温特性的影响,为根据煤灰组分分析来预测不同煤的熔渣黏温特性及对气流床气化的适应性提供了一个简单而实用的判断方法。对气流床气化液态排渣的适应性从高到低依次为:中钙高铁类、高钙低铁类、中钙中铁类、低钙低铁类和高钙高铁类。

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