Study on the Deposits Derived from a Biomass Circulating Fluidized-Bed Boiler

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• 作者：Lianming Li ; Chunjiang Yu ; Fang Huang ; Jisong Bai ; Mengxiang Fang ; Zhongyang Luo
• 刊名：Energy & Fuels
• 出版年：2012
• 出版时间：September 20, 2012
• 年：2012
• 卷：26
• 期：9
• 页码：6008-6014
• 全文大小：435K
• 年卷期：v.26,no.9(September 20, 2012)
• ISSN：1520-5029

文摘

Biomass tends to form deposits and tends to slag during combustion. This study focused on deposits obtained from a circulating fluidized bed (CFB) in a biomass power plant. Analyses using scanning electron microscopy, energy-dispersive spectrometry, and X-ray diffraction are also included. The results indicate that the deposits are dense with a certain hardness, which resulted from the erosion of particles in the CFB. The deposits are high in K, Na, Cl, and Ca, whereas Si, Al, Mg, and S contents are relatively lower. KCl and K₂SO₄ are the main components of the deposits. The particles in the flue are captured by the viscous layer that was formed by the condensation of gaseous KCl and K₂Ca(SO₄)₂ on the surface of the tubes. Moreover, deposits are formed under the effect of the adhesion and capturing processes, in alternation.