一种研究飞灰粒径分布和磨耗的简单方法

A Simple Method to Investigate the Ash Size Distribution and Its Attrition

基于对流化床燃烧条件下煤的成灰磨耗过程的分析,提出了用静床燃烧和振动筛分研究煤燃烧成灰磨耗的简化方法,以代替复杂的流化床热态实验.将该方法的实验结果与冷态流化进行比较,并进行了理论分析,表明该方法与流态化方法是完全相似的.通过这种方法可以方便地得到可靠的流化床条件下的煤燃烧成灰磨耗参数.

In this paper, a simple method to investigate the ash size distribution and its attrition was suggested. An oven and a sieving machine were used instead of hot CFB facility to test the ash formation character of coal in CFB boiler. A cold CFB test rig was also built, whose results were used to compare with that from the suggested method. The theoretical basis of the simple method was also discussed. The result shows that the sieving method is quite similar to the fluidizing method in the investigation of the ash size distribution and its attrition. The information of coal ash size formation and its attrition from the suggested method is available for CFB boiler design.