Combustion and NO Emission of Shenmu Char in a 2 MW Circulating Fluidized Bed

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• 作者：Zhiqiang Gong ; Zhicheng Liu ; Tuo Zhou ; Qinggang Lu ; Yunkai Sun
• 刊名：Energy & Fuels
• 出版年：2015
• 出版时间：February 19, 2015
• 年：2015
• 卷：29
• 期：2
• 页码：1219-1226
• 全文大小：478K
• ISSN：1520-5029

文摘

The combustion and NO emission characteristics of Shenmu coal and char were investigated with a thermogravimetry鈥搈ass spectrometry (TG鈥揗S) system and on a pilot platform of a 2 MW circulating fluidized bed (CFB), respectively. Unlike Shenmu coal, the disadvantages of Shenmu char combustion include late ignition, poor combustion stability, and poor burnout. Despite its well-developed pore structure, there is less volatile content and more carbon crystal for Shenmu char, resulting in lower combustion reactivity compared to Shenmu coal. The combustion of Shenmu char has a higher dependence upon the combustion temperature, and it improves when the combustion temperature exceeds 900 掳C. NO emission from the combustion of Shenmu char decreases with an increase in the combustion temperature, which is in contrast with the combustion of Shenmu coal. However, with an increase in the excess air ratio and a decrease in the secondary air ratio and the height of the secondary air port, NO emission from the combustion of both Shenmu char and coal increases.