垃圾焚烧飞灰颗粒的微观形态特征及能谱研究

利用SEM/EDX，观察了垃圾焚烧飞灰颗粒的微观形态特征，探讨了其主要组成元素及其质量分数。实验结果表明，飞灰颗粒形态多样化，其中以不规则形状聚合体居多，球形体、絮状集合体相对较少，少数颗粒为棒状集合体。球形飞灰颗粒很少有重金属分布，不规则形状聚合体或絮状集合体的表面易分布重金属。从飞灰颗粒表面、内部组成元素的质量分数来看，Si、Ca、Al为主要元素。飞灰颗粒表面、内部有重金属Pb、Cu等分布，局部测定点其质量分数可高达16.2%和14.5%。

Microstructure characteristic and X-ray energy dispersive microanalysis of MSW incineration fly ash

The microstructure characteristic and the major elements analysis of the fly ash from the municipal solid waste incinerators(MSWI) was conducted by using scanning electron microscope(SEM) and X-ray energy dispersive microanalysis(EDX).The results show that the shape of fly ash particles is various.Most particles are irregular,some are baculiform and very few particles are spherical and flocculent.It is found that the spherical particles contain little heavy metal,but there are a number of heavy metals on the surface of irregular and flocculent particles.On the surface and in the inner of the fly ash particles,the major elements are Si,Ca and Al as well as heavy metals such as lead and copper.At some micro-areas/points the weight percentage of lead and copper reaches 16.22% and 14.48%,relatively.