| 许芸芸.煤自燃氧化特性测试系统的耗氧规律分析[J].唐山学院学报,2019,32(6):57-62 |
| 煤自燃氧化特性测试系统的耗氧规律分析 |
| Analysis of Oxygen Consumption Law Based on Test System of Coal’s Spontaneous Combustion Oxidation Characteristics |
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| DOI：10.16160/j.cnki.tsxyxb.2019.06.014 |
| 中文关键词: 煤自燃 氧化特性 耗氧速率 氧浓度 表观活化能 |
| 英文关键词: coal’s spontaneous combustion oxidation characteristics oxygen consumption rate oxygen concentration apparent activation energy |
| 基金项目:国家自然科学基金项目（51474086）；河北省自然科学基金项目（E2014209138） |
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| 中文摘要: |
| 基于煤自燃氧化特性测试系统，推导煤自燃过程中的平均耗氧速率和标准耗氧速率计算式，求解各温度点煤体的平均氧浓度数值以及氧浓度和耗氧速率分布函数，确定煤自燃氧化动力学参数表达式。采用模拟实验对此系统的耗氧规律进行分析，结果表明，煤自燃过程中随着温度升高，反应体平均氧浓度点逐渐沿气体流动方向远离流动距离中心点，各温度点煤体氧浓度及耗氧速率沿流动路径呈负指数分布，当温度较低时可近似作线性处理。此外，分析表明，若以平均耗氧速率作为煤自燃氧化反应速率，可更全面、直观地对煤自燃氧化阶段进行划分。 |
| 英文摘要: |
| The formulas for calculating average oxygen consumption rate and standard oxygen consumption rate during the spontaneous combustion is inferred with the test system of coal's spontaneous combustion oxidation characteristics. Then the average oxygen concentration value and the distribution function of oxygen concentration and consumption rate is calculated. Based on the above research,the kinetic parameters of coal's spontaneous combustion oxidation is determined. With the simulation experiment for coal's spontaneous combustion adopted for analysis, the results show that the average oxygen concentration of the reaction body gradually moves away from the center of the gas flow path as the temperature rises during coal's spontaneous combustion. The oxygen concentration and consumption rate of the coal at each temperature point are negatively distributed along the flow path,and it could be approximated as linear treatment when the temperature is low. In addition,the analysis shows that the stages of coal's spontaneous combustion oxidation could be divided more comprehensively and apparently if the rate of average oxygen consumption is taken as the rate of coal's spontaneous combustion oxidation. |
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