A study on fluidized bed combustion characteristics of corncob in three different combustion modes

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• 作者：Chien-Song Chyang^a ; ^{cschyang@cycu.edu.tw} ; ^{cschyang@gmail.com} ; Feng Duan^b ; Shih-Min Lin^a ; Jim Tso^c
• 关键词：VFBC ; vortexing fluidized bed combustor ; FGR ; flue gas recirculation ; LHV ; lower heating value ; FBC ; fluidized bed combustor ; CFB ; circulating fluidized bed ; ID fan ; induced draft fan ; EA ; excess air ratio (%) ; Yi ; the combustion fraction in the each zone
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：July, 2012
• 卷：116
• 期：Complete
• 页码：184-189
• 文件大小：511 K

摘要

This paper presents results obtained from corncob combustion in a pilot scale vortexing fluidized bed combustor (VFBC). Three combustion modes including direct combustion, staged combustion and flue gas recirculation (FGR) combustion were employed, and their combustion and pollutant emission characteristics were studied. In addition, the effects of combustion fraction and bed temperature on pollutant emission characteristics were investigated. The experimental results show that the combustion fractions vary with different combustion modes, resulting in different CO and NO emission characteristics. Staged and FGR combustions can reduce the NO emission concentration. Under similar working condition, NO concentration decreases by 30%in FGR mode, while 15%in staged mode compared with direct mode.