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Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration
Zhao J(赵京); Wei XL(魏小林); Li T(李腾); Li HX(李慧鑫); Bin F(宾峰)
发表期刊ENERGY & FUELS
2018-04-01
卷号32期号:4页码:4417-4423
ISSN0887-0624
摘要Fly ash containing high levels of alkali metals likely causes deleterious effects during municipal solid waste incineration, including fouling, slagging, corrosion, and deterioration of materials. This study aimed to understand the occurrence of alkali metals in fly ash, the attachment phenomenon of fly ash, and the corrosion mechanisms of high-temperature surfaces in heat exchangers. The presence of alkali metals was studied through a three-step extraction. Additionally, scanning electron microscopy energy-dispersive spectrometry was used to analyze the surface microstructure of fly ashes. X-ray fluorescence and X-ray diffraction (XRD) spectroscopies were used for content and crystalline phase analyses of alkali metals. The experimental results indicated that the surfaces of fly ash that contained higher levels of alkali metals were smoother and the content of alkali metals tended to increase with a slight fluctuation with the declining effluent gas temperature. The alkali metals were mainly water-soluble. On the basis of the XRD analyses, the water-soluble alkali metals were primarily alkali chlorides and sulfates, existing as NaCl, KCl, and K3Na(SO4)(2). Moreover, the transformation of alkali metals could accelerate corrosion of the heat exchanger as a result of the formation of a low-temperature eutectic melt.
DOI10.1021/acs.energyfuels.7b03001
收录类别SCI ; EI
语种英语
WOS记录号WOS:000430783300037
关键词[WOS]HIGH-TEMPERATURE CORROSION ; CIRCULATING FLUIDIZED-BED ; VICTORIAN BROWN-COAL ; EARTH METALS ; INORGANIC CONSTITUENTS ; WOOD COMBUSTION ; RELEASE ; TRANSFORMATION ; RESIDUES ; CHLORIDE
WOS研究方向Energy & Fuels ; Engineering
WOS类目Energy & Fuels ; Engineering, Chemical
项目资助者National Key R&D Program of China(2016YFB0600601)
论文分区二类
力学所作者排名1
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77482
专题高温气体动力学国家重点实验室
空天飞行科技创新研究中心(筹)
推荐引用方式
GB/T 7714
Zhao J,Wei XL,Li T,et al. Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration[J]. ENERGY & FUELS,2018,32(4):4417-4423.
APA 赵京,魏小林,李腾,李慧鑫,&宾峰.(2018).Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration.ENERGY & FUELS,32(4),4417-4423.
MLA 赵京,et al."Behavior of Alkali Metals in Fly Ash during Waste Heat Recovery for Municipal Solid Waste Incineration".ENERGY & FUELS 32.4(2018):4417-4423.
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