电子探针分析炉内沾污结渣动态过程

在0.25 MW试验炉内壁选取两块代表性的渣样，分别代表沾污和结渣，借助电子探针分析沿渣样剖面厚度方向不同位置各矿物元素的动态分布，结果表明，Fe、Na和S的富集是形成结渣初始层的重要原因，而Na、Si、Al和S的富集则是沾污初始层的最大特点，Fe、Ca对结渣的贡献比对沾污的贡献大;单个样品中Si和Al具有相同的分布规律.

Fouling and slagging dynamic processes in boiler with electron probe microanalyzer

Two pieces of typical slags specimens were sampled from 0.25 MW test furnace wall to represent fouling and slagging, respectively.Each mineral element dynamic distribution was analyzed along the slag sample’s thickness direction by using electron probe microanalyzer.Enrichment of iron,sodium and sulphur was the substantial reason leading to forming slag’s initial layer, while enrichment of sodium,silicon,aluminum and sulphur was the most outstanding trait of the fouling sample’s initial layer.Iron and calcium played much more important role in the course of slagging than fouling.Silicon and aluminum showed identical distribution regularities in two individual samples.