Combustion and NOx Emission Characteristics of Shenmu Char in a Circulating Fluidized Bed with Post-combustion

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• 作者：Zhiqiang Gong ; Tuo Zhou ; Qinggang Lu ; Yongjie Na ; Yunkai Sun
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：January 21, 2016
• 年：2016
• 卷：30
• 期：1
• 页码：31-38
• 全文大小：545K
• ISSN：1520-5029

文摘

Combustion and NO_x emission characteristics of Shenmu char have been investigated in a circulating fluidized bed test platform composed of a circulating fluidized bed and a post-combustion chamber. The effect of the combustion temperature in the circulating fluidized bed furnace and arrangement of post-combustion air were examined on the post-combustion of Shenmu char. NO_x emission is below 100 mg/m³ in all post-combustion experiments. The effect of the temperature in the circulating fluidized bed furnace or post-combustion chamber on NO_x emission is not obvious. When the post-combustion air injection position moves upstream, NO_x emission decreases. In a reducing atmosphere, most fuel nitrogen is converted to N₂. NO_x is mainly formed from the reaction of residual N in the char contained in fly ash and O₂ from post-combustion air in the post-combustion chamber. Nitrogen in char is gradually released and converted during combustion and not instantaneously.