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通过灰成分分析、热重-差示扫描量热-傅里叶红外光谱分析联用(TG-DSC-FTIR)试验,对桉树类生物质锅炉燃烧后飞灰可燃物含量的分析方法进行了研究.结果表明:桉树类生物质燃烧后飞灰中含有多种金属化合物,在空气高温加热过程中会同时发生缓慢氧化反应、碳酸盐分解反应、碱金属氯化物的蒸发过程,影响其中可燃物含量的准确测量;灰中可燃物燃烧温度约在350~550℃范围内,采用低浓度硫酸酸洗对灰样进行预处理,可排除碳酸盐分解反应、碱金属及氯元素的蒸发过程对可燃物含量测量的干扰,且以10K/min及以下的低升温速率加热时灰样中化合物不会发生缓慢氧化反应,使灰中可燃物含量测量结果较为准确.
The analysis methods of fly ash combustibles content after combustion of eucalyptus biomass boiler were studied by means of gray component analysis and TG-DSC-FTIR The results showed that many kinds of metal compounds were contained in the fly ash after the combustion of the eucalyptus biomass, and the slow oxidation reaction, the carbonate decomposition reaction and the alkali metal chloride evaporation process occurred simultaneously during the heating process of the air, which affected the combustibles The combustion temperature of combustibles in ash is about 350-550 ℃. Pretreatment of ash samples with low concentration sulfuric acid pickling can eliminate the decomposition reaction of carbonates and the evaporation process of alkali metals and chlorine. Combustible content measurement interference, and to 10K / min and below the heating rate of low heating rate when the ash sample compound does not occur slow oxidation reaction, the ash content of combustible content measurement more accurate.