Coal Blending with Petroleum Coke in a Pulverized-Fuel Power Plant

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• 作者：Katia S. Milenkova ; Angeles G. Borrego ; Diego Alvarez ; Rosa Mené ; ndez ; Henrik I. Petersen ; and Per Rosenberg
• 刊名：Energy & Fuels
• 出版年：2005
• 出版时间：March 2005
• 年：2005
• 卷：19
• 期：2
• 页码：453 - 458
• 全文大小：543K
• 年卷期：v.19,no.2(March 2005)
• ISSN：1520-5029

文摘

The current work investigates the performance of petroleum coke (PC) as a blended fuel underpulverized-fuel combustion conditions. Three full-scale combustion experiments were carriedout: a pure Carboniferous, high volatile bituminous coal and two blends of this coal with differentproportions of PC. The samples studied included feed fuels and blends, fly ashes, chars taken atdifferent positions of the combustion chamber, and chars prepared in a drop tube reactor to testthe performance of the individual fuels. The addition of PC led to a substantial increase in theunburned carbon of the fly ashes. The petrographic analysis of the granulometric fractions ofthe fuels revealed that this increase cannot be attributed to an enrichment in coke of the coarserfractions, as reported in the literature. On the contrary, the finer fraction contained slightlymore coke than the raw blend. The petrographic analysis of the chars collected with the suctionprobe and the fly ashes showed that the two blended fuels were strongly enriched in PC-derivedmaterial, indicating a poorer combustibility compared to the high volatile bituminous coal. It isconcluded that the reactivity of the blends in the later stages of combustion is related with thecontents of PC-derived chars and the burnout itself.