A new route for unburned carbon concentration measurements eliminating mineral content and coal rank effects.
A new route for unburned carbon concentration measurements eliminating mineral content and coal rank effects.
复制标题
消除矿物质含量和煤品位影响的未燃烧碳浓度测量新途径
DOI：
10.1038/srep04567
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发表时间：
2014-04-02
影响因子：
4.6
通讯作者：
Yu HT
中科院分区：
文献类型：
--
作者：
Liu D;Duan YY;Yang Z;Yu HT
全世界每年产生5亿吨粉煤灰，仅占总利用量的16%。因此，使用粉煤灰的潜在应用具有环境和工业利益。未燃碳浓度测量是有效应用粉煤灰的基础。目前在线测量精度受矿物质含量和煤阶的强烈影响。本文介绍了一种测量未燃碳浓度的半焦/灰颗粒团光谱发射率法。在此理论上预测了不同未燃碳浓度下的煤焦/灰颗粒团光谱发射率，表明该测量方法对未燃碳浓度敏感，但在短波长下对矿物质含量和煤阶不敏感。结果表明，半焦/灰颗粒团光谱发射率法是一种不受煤中矿物质含量和煤阶影响的在线测量未燃碳浓度的新方法。
500 million tons of coal fly ash are produced worldwide every year with only 16% of the total amount utilized. Therefore, potential applications using fly ash have both environmental and industrial interests. Unburned carbon concentration measurements are fundamental to effective fly ash applications. Current on-line measurement accuracies are strongly affected by the mineral content and coal rank. This paper describes a char/ash particle cluster spectral emittance method for unburned carbon concentration measurements. The char/ash particle cluster spectral emittance is predicted theoretically here for various unburned carbon concentrations to show that the measurements are sensitive to unburned carbon concentration but insensitive to the mineral content and coal rank at short wavelengths. The results show that the char/ash particle cluster spectral emittance method is a novel and promising route for unburned carbon concentration on-line measurements without being influenced by mineral content or coal rank effects.
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