| 型煤燃烧固硫中的温度效应 |
| 摘要点击 1744 全文点击 2518 投稿时间：1997-05-28 |
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| 中文关键词 型煤 固硫 X射线粉末衍射 X射线荧光光谱分析 |
| 英文关键词 coal briquette sulfur capture X-ray powder diffraction method X-ray fluorescent spectrometry |
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| 中文摘要 |
| 以氧化钙作为固硫剂的型煤中适当加入Fe、Si添加剂组分,燃烧生成新的固硫体系后进行2种不同温度条件下的进样实验。①型煤样品分成6份,进行逐渐升温实验,分别加热到1170℃-1220℃,温度间隔10℃,恒温1/4h;②型煤样品分成7份,进行先升温后进样实验,将加热炉分别升温至要求温度1000℃-1300℃后进样,温度间隔50℃,恒温1/2h.实验表明:在Fe、Si体系的型煤燃烧过程中,当进样温度条件不同,即当型煤直接进入高温炉燃烧时其固硫率比逐渐升温燃烧明显提高,在1300℃时实验②固硫率为77%,实验①已降到30%以下。对所生成的燃烧产物采用X射线粉末衍射法与X射线荧光光谱法进行分析与表征,讨论温度对固硫率的影响,以阐明高温条件下的固硫效果及其固硫作用机理。 |
| 英文摘要 |
| In this paper,the effect of temperature on efficiency of sulfur capture was studied for coal briquette with an additive(Fe,Si)at high temperature combustion.The results showed that the coal briquette of Fe-Si system in process of combustion at different sampling conditions,the rate of sulfur capture is obvious difference.During the coal briquette entered into the furnace directly at 1300℃,the rate of sulfur capture reached up to 77%.Characterization of the slags left after combustion has been carried out by using X-ray powder diffraction method and X-ray fluorescent spectrometry.No other crystalline sulfur containing species besides CaSO4 and CaS were found.A vitreous iron oxides and small amounts of silicate were identified on the surface of sulfur containing grains by means of other method.This might explain the diffusion barrier mechanism of sulfur fixation during coal briquette combustion at high temperature. |
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