| 造纸污泥与煤/生物质掺混燃烧特性及动力学分析 |
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| 引用本文： | 方诗雯,丁力行,陈姝,沈向阳,王澜珂.造纸污泥与煤/生物质掺混燃烧特性及动力学分析[J].仲恺农业工程学院学报,2021,34(1):41-47. |
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| 作者姓名： | 方诗雯 丁力行 陈姝 沈向阳 王澜珂 |
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| 作者单位： | ;1.仲恺农业工程学院机电工程学院;2.中国科学院可再生能源重点实验室 |
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| 摘 要： | 为研究造纸污泥与煤/生物质混合原料的燃烧特性及其动力学行为，通过热分析试验和分布式活化能模型方法，研究20%O2/80%N2的燃烧气氛下，造纸污泥在10 ℃/min升温速率下与混煤、蔗渣在不同掺混比下的燃烧特性和动力学参数．研究结果显示：1）随着混煤掺混比的增加，燃烧过程的温度范围不断缩小，综合燃烧特性指数先增加后减小再增加，平均活化能增加至219.41 kJ/mol（10Z90H）后下降．在低温范围内，污泥与混煤的掺混对减少物料的质量残留率具有促进作用，高比例的混煤与污泥掺混在高温阶段对反应具有抑制作用．结果表明，90Z10H为污泥与混煤的最佳掺混比．2）随着蔗渣掺混比的增加，着火温度先增加后减低，终止温度不断降低，综合燃烧指数不断增加，活化能从190.97 kJ/mol不断增加至215.24 kJ/mol，低温阶段两者并没有明显的交互作用．综上所述，50Z50Z为污泥与蔗渣的最佳掺混比．
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| 关 键 词： | 造纸污泥 混煤 蔗渣 混合燃烧 分布式活化能模型 |
| 收稿时间： | 2021-04-01 |
The analysis of co-combustion characteristics and kinetic of paper sludge and mixed coal/biomass |
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| Abstract: | It is necessary to master the combustion characteristics and dynamic behavior of the mixed raw materials (paper sludge mixed with coal/biomass). Through thermogravimetric experiments and distributed activation energy model method, the co-combustion characteristics and kinetic parameters of paper sludge and mixed coal/bagasse at different mixing ratios, at 10 ℃/min heating rate, under 20% oxygen /80% nitrogen atmosphere were studied. The results is as follows: 1) With the increasing of mixed coal ratio, the temperature range of the combustion process continued to narrow. The comprehensive combustion characteristic index increased first and then decreased again increased. The average activation energy increased to 219.41 kJ/mol (10Z90H), then fell. Within the scope of the low temperature, the mixing of sludge and the mixed coal could promote the reduction of mass residual rate of materials. The blend with high proportion of mixed coal could inhibit the reaction at high temperature stage. Above all, 90Z10H was the best mixing ratio of sludge and mixed coal. 2) With the increase of bagasse ratio, the ignition temperature first increased and then decreased, the burnout temperature kept dropping, the comprehensive combustion characteristic index increased continually and activation energy increased from 190.97 kJ/mol to 215.24 kJ/mol. In the low temperature stage, there was no obvious interaction between the two. To sum up, 50Z50Z was the optimal mixing ratio of sludge and bagasse. |
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