高挥发份燃料在循环流化床燃烧室中挥发份释放的统计模型

A STATISTICAL MODEL FOR VOLATILE MATTER LIBERATION OF HIGH VOLATILE FUELS IN CIRCULATING FLUIDIZED BED COMBUSTOR

研究高挥发份燃料的挥发份在循环流化床燃烧室（ＣＦＢＣ）中的释放分布对这类燃料在ＣＦＢＣ中的燃烧计算非常重要。本文根据现有的文献和实验结果，认为挥发份在燃烧室中的释放分布可用威布尔（Ｗｅｉｂｕｌｌ）函数来描述。用优化方法求得了不同挥发份成分的分布参数。将得到的分布参数带入ＣＦＢＣ综合模型，计算燃烧室中烟气成分的浓度场，结果较其它分布模型更接近于实验值。

It is very important to study characteristics of volatile matter liberation of high volatile fuels in circulating fluidized bed combustor (CFBC). This paper suggests that the volatile matter liberation model of the fuels in CFBC follows Weibull function. The distribution parameters of the function for CO, H2, CO2 and CxHy were found out by the optimization algorithm DSFD. The concentration profiles of flue gas components (CO2, O2, CO, CxHy) in CFBC, that were calculated by a comprehensive one-dimension CFBC model containing the distribution model of Weibull function, are in better agreement with the experimental profiles than other distribution models.