生物质成型燃料流化床燃烧粘结机理实验研究  

Experimental Study on Agglomeration Mechanism of Biomass Briquette Fuels in Fluidized Bed

作　　者：宁新宇[1,2] 李诗媛[1] 吕清刚[1] 矫维红[1] 

机构地区：[1]中国科学院工程热物理研究所 [2]中国科学院研究生院

出　　处：《电站系统工程》2008年第6期17-19,共3页Power System Engineering

基　　金：国家自然科学基金(50706055)

摘　　要：在小型鼓泡流化床实验装置上,以石英砂为床料,进行了不同温度下果木枝条成型燃料流化床燃烧床料粘结机理实验研究。试验结果表明,温度是影响生物质流化床燃烧床料粘结的重要因素。通过对实验中形成的结团进行扫描电子显微镜、X射线能谱(SEM/EDX)以及对床料的X射线荧光光谱(XRF)分析表明,床料中碱金属元素的含量不能作为判断床料是否将要发生粘结的依据,而是取决于碱金属的存在形态;同时果木枝条灰中的Ca是构成结团颗粒粘附物的重要组分,其对床层发生结团有一定的影响作用。Agglomeration during the combustion of biomass briquette fuels was investigated at different temperatures in a bench-scale bubbling fluidized bed using quartz sand as bed materials. The experiment results indicate the bed temperature plays an important role on the agglomeration. Scanning electron microscopy, energy-dispersive X-ray （SEM/EDX） was used to analyze the agglomerates, and X-ray fluorescence （XRF） was used to analyze the bed material after experiments. The analysis shows the agglomeration doesn＇t depend on the content of alkali metals but the formation in the bed material. Calcium is one of the elements composed of eutectics, which has some effect on the agglomeration.

关 键 词：生物质 粘结 流化床 燃烧 

分 类 号：TK6[动力工程及工程热物理—生物能]