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化工学报  2015 

流化床中燃烧高水高氮酒糟的NO排放特性

DOI: 10.11949/j.issn.0438-1157.20150182, PP. 2694-2701

Keywords: 酒糟,流化床,燃烧,NO排放浓度,高含水燃料,高含氮燃料

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Abstract:

采用流化床反应器,研究富水蒸气条件下酒糟燃烧的NO排放特性。结果表明,增加过量空气系数和升高燃烧温度,NO排放浓度升高;对送入燃烧反应器的气体中添加水蒸气模拟高水分燃料燃烧有效地降低了酒糟燃烧的NO排放浓度及总排放量,且在适当条件下可减少NO排放约46%(质量)。酒糟灰分中的金属氧化物对NO的还原有催化作用,且随着温度的升高变强。在含H2或CO的N2气氛中,灰分对NO催化还原作用更明显。水蒸气本身对NO没有明显还原作用,说明水蒸气是通过与碳氢化合物反应生成还原性气体,如H2和CO,从而在酒糟灰催化作用下强化NO的还原。

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