| 引用本文: | 刘国伟,董芃,韩亚芬,别如山.富氧条件下煤燃烧特性的热重分析实验研究[J].哈尔滨工业大学学报,2011,43(1):104.DOI:10.11918/j.issn.0367-6234.2011.01.021 |
| LIU Guo-wei,DONG Peng,HAN Ya-fen,BIE Ru-shan.Experimental study on combustion characteristics of coals under enriched-oxygen condition by thermo-gravimetric analysis[J].Journal of Harbin Institute of Technology,2011,43(1):104.DOI:10.11918/j.issn.0367-6234.2011.01.021 |
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| 摘要: |
| 为研究氧气浓度变化对煤燃烧特性的影响规律,利用热重分析对4种煤样在不同氧气体积浓度(21%、30%、40%、70%、100%)条件下的燃烧特性进行实验研究,根据实验结果分析氧气浓度对不同煤样燃烧动力学参数的影响.结果表明:随着氧气浓度的增大,煤样的着火温度及燃烬温度均呈下降趋势,且燃烬温度相对于着火温度下降得更快,煤粉着火时间提前且燃烧时间缩短,最大失重速率增大;煤粉燃烧符合一级反应规律;随着氧气浓度的增大,煤种的表观活化能增大,频率因子也增大,且从褐煤到无烟煤,表观活化能增大的幅度越来越大. |
| 关键词: 氧气浓度 燃烧特性 热重分析 动力学参数 |
| DOI：10.11918/j.issn.0367-6234.2011.01.021 |
| 分类号:TK16 |
| 基金项目: |
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| Experimental study on combustion characteristics of coals under enriched-oxygen condition by thermo-gravimetric analysis |
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LIU Guo-wei, DONG Peng, HAN Ya-fen, BIE Ru-shan
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School of Energy Science and Engineering,Harbin Institute of Technology,150001 Harbin,China
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| Abstract: |
| Four different coals have been used to study the effects of oxygen concentration on coal combustion characteristics under different oxygen volume concentration ( 21% 、30% 、40% 、70% 、100% ) by thermo-gravimetric analysis experiments. The results show: with the oxygen concentration increases,the ignition and burnout temperatures of coal decrease and the burn-out temperature decreases faster; The ignition time brings forward,the combustion time shortens and the maximum weight-loss rate increases; The combustion of pulverized coals complies with the rule of one-rank reaction; The apparent activation energy and frequency factors of coals increase,and from brown coal to anthracite,the magnitude of apparent activation energy increases faster. |
| Key words: oxygen concentration combustion characteristics thermo-gravimetric analysis kinetics parameters |
