高硅煤燃烧颗粒物的生成特性研究

The Formation and Characteristic of Particulate Matter During High Silicon Coal Combustion

利用沉降炉对高硅煤燃烧过程中可吸入颗粒物的生成特性进行了详细研究,采用XRD、XRF及扫描电镜对高硅煤低温灰、高温灰、燃高硅煤电厂飞灰中矿物及元素组分进行了系统分析,实验结果表明:高硅飞灰中识别出的矿物主要包括石英和莫来石,石英在较小粒径飞灰颗粒中含量较高;亚微米颗粒(PM_(1.0))和总悬浮颗粒(PM_(10))排放量随着燃烧温度的升高而增加;温度升高导致细颗粒中Si含量有所增加,S含量下降。

To understand the formation and characteristic of inhalable particulate matter during high silicon coal combustion, systematic experiments were conducted using drop tube furnace. The X-ray diffraction spectrometry （XRD）, X-ray fluorescence spectrometry （XRF） and scanning electronic microscopy （SEM） were using to analyzer the mineral and chemical composition of lower temperature ash, high temperature ash of high silicon coal, and the high silicon fly ash from power plant. The results indicated that： the mineral component in high silicon fly ash is quartz and mullite, quartz is enriched in fine fly ash particles. With the temperature increasing, the emission amount of submicron particulate matter （PM1.0） and total particulate matter （PM10） increased. The silicon content in fine particle also increased with temperature increasing, while sulfur content in fine particle decreased.