水煤浆气化炉中煤粉燃烧前后的矿物质变化

doi:10.19286/j.cnki.cci.2020.09.029

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摘要

为探究气化炉中煤粉燃烧前后矿物质的变化情况，以渭南化肥厂正常生产工段水煤浆气化炉制浆原料煤、灰渣为研究对象，对比观察了气化前后样品的表面形貌与XRD，结果表明，炉温升高加剧了煤中物质粒子的扩散运动，矿物质相变过程中存在着化学键的断裂与重排，并伴随有大量物质相互间的转化；灰渣是矿物质熔融体与未燃炭、杂质共同组成的混合物，其表面由于质点的强烈热运动导致的气体逸出和晶格缺陷而产生发达孔隙结构；高温使矿物质原本的晶体结构被破坏，最终呈玻璃相固化于灰渣中。

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	吴阳1
	李博2

关键词 ：煤气化, 灰渣, 表面形貌, XRD, 相变, 晶格缺陷

Abstract：

In order to investigate the changes of minerals before and after the combustion of pulverized coal in the gasifier, the surface morphology and XRD of the samples before and after the gasification were compared and observed with the raw materials of coal-water slurry gasifier in the normal production section of the Weinan Chemical Fertilizer Plant, and the results showed that the increase of the furnace temperature exacerbated the diffusion movement of the material particles in the coal, and there were chemical bond breaks and rearrangement accompanied by a large number of substances during the phase change of the minerals. Phase transformation; ash is a mixture of mineral melt with unburned carbon and impurities, the surface of which has a well-developed pore structure due to gas escape and lattice defects caused by the strong thermal movement of the mass; the high temperature destroyed the original crystal structure of the minerals and finally presented a glassy phase solidified in the ash.

Key words： coal gasification residue surface topography XRD phase change lattice imperfection

作者简介: 吴阳（ 1991— ），男，新疆石河子人，助教。

引用本文:

吴阳1，李博2. 水煤浆气化炉中煤粉燃烧前后的矿物质变化[J]. 煤炭与化工, 2020, 43(9): 102-106. Wu Yang1, Li Bo2. Mineral changes before and after combustion of pulverized coal in a coal-water slurry gasifier. CCI, 2020, 43(9): 102-106.

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http://www.mtyhg.com.cn/CN/10.19286/j.cnki.cci.2020.09.029 或 http://www.mtyhg.com.cn/CN/Y2020/V43/I9/102

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