Abstract

In order to alleviate the problem of slagging caused by biomass combustion, this paper studied the slagging characteristics of peanut shell shaped granular fuel under different inorganic additives and their mixing ratios. X-ray fluorescence spectroscopy, X-ray diffraction and five evaluation indexes, such as contamination index, iron-calcium ratio, alkali-acid ratio, silicon ratio and silicon-aluminum ratio, were used to analyze the ash generated by the combustion of peanut shell shaped granular fuel. The results showed that the more acidic oxides, the less alkaline oxides, the higher the ash melting point, the less easy to slag, that is, the smaller the alkali-acid ratio, the less easy to slag. Comparing the values of the five evaluation indexes, such as contamination index, iron-calcium ratio, alkali-acid ratio, silicon ratio and silicon-aluminum ratio, it was found that the slag removal effect of kaolin additive was the best. Under the high temperature mode, the five evaluation indexes were 0.32, 0.56, 0.30, 0.79, 1.83, respectively. Under the low temperature mode, they were 0.17, 0.67, 0.25, 0.81, 1.68, respectively. It was obviously better than the slag removal effect of MgO, CaO or the proportional mixture of the three additives. This study provides a certain reference for reducing the slagging phenomenon generated by the combustion of peanut shell shaped granular fuel.

中文翻译：

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无机添加剂对花生壳颗粒燃料结渣特性的影响

摘要

为了缓解生物质燃烧造成的结渣问题，研究了不同无机添加剂及其混合比例下花生壳状颗粒燃料的结渣特性。采用X射线荧光光谱、X射线衍射和污染指数、铁钙比、碱酸比、硅比、硅铝比等5项评价指标对花生燃烧产生的灰分进行分析。壳形颗粒燃料。结果表明，酸性氧化物越多，碱性氧化物越少，灰熔点越高，越不易结渣，即碱酸比越小，越不易结渣。比较污染指数、铁钙比、碱酸比、硅比、硅铝比等5个评价指标的数值，发现高岭土添加剂的除渣效果最好。高温模式下，5个评价指标分别为0.32、0.56、0.30、0.79、1.83。低温模式下，分别为0.17、0.67、0.25、0.81、1.68。明显优于MgO、CaO或三种添加剂按比例混合的除渣效果。该研究为减少花生壳状颗粒燃料燃烧时产生的结渣现象提供了一定的参考。