无烟煤挥发分和焦炭独立燃烧过程中NO生成规律
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摘要: 采用固定床反应器，将无烟煤粉的燃烧分为焦炭燃烧和挥发分燃烧两部分，研究了各自燃烧过程中产生NO的规律，评价了焦炭N和挥发分N对煤粉燃烧产生NO的相对贡献。结果表明，煤粉N﹑焦炭N和挥发分N的转化率都随过量空气系数α和温度的增加而增加；焦炭N是无烟煤粉燃烧过程中NO的主要来源；煤粉的转化率都小于煤粉分解燃烧时挥发分转化率加焦炭的总转化率；还原性气氛或氧化性气氛越强，挥发分和焦炭在煤粉燃烧时的相互作用越强。Abstract: The experiments on the combustion of volatile and char of anthracite were carried out separately in a fixed-bed reactor. The NO release characteristics of volatile N and char N combustion and the relative contribution of volatile N and char N to NO formation of coal combustion were studied. It is found that coal N, volatile N and char N conversion increases as the excess air coefficient and temperature increase. Char N is the primary resources of NO formation during anthracite combustion. The coal N conversion is less than the total conversion of volatile N and char N, which is resulted from the interaction between volatile and char during coal combustion as it is in the reductive or oxidative atmosphere.
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Key words:
- anthracite /
- combustion /
- NO release
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