基于程序升温实验的煤低温氧化特性数值模拟研究
Numerical simulation research on low-temperature oxidation characteristics of coal based on temperature-programmed experiment
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摘要: 为了更细致地理解煤低温氧化特征及其物理过程，采用程序升温实验研究了不同煤样粒径的低温氧化过程关键参数的演变规律，并采用数值模拟方法进一步阐释了煤低温氧化过程的多物理场演化细节特征，依据实验结果对数值模拟的正确性进行了验证，基于实验与数值模拟结合的方式探究了程序升温实验仓内煤样的温度、反应物与生成物质量分数和流体流动等特征。结果表明：数值模拟可以很好地表征煤低温氧化过程，并展示了各物理场时序的变化特性；根据煤氧化过程的气体排放与氧气消耗，可以将煤低温氧化划分为2个阶段，70 ℃为其临界值；随着煤低温氧化的发展，煤氧化反应的前沿是向高氧气体积分数区域移动。Abstract: To understand the characteristics of coal low-temperature oxidation and its physical process in more detail, temperature-programmed experiments are used to study the evolution of key parameters of the low-temperature oxidation process of different coal sample sizes. The numerical simulation method is used to further explain the detailed characteristics of the multi-physical field evolution of the coal low-temperature oxidation process. The correctness of the numerical simulation was verified based on the experimental results. Based on the combination of experiment and numerical simulation, the characteristics of temperature, mass fractions of reactants and products, and fluid flow of the coal samples in the temperature-programmed experimental chamber were explored. The result shows that the numerical simulation can well characterize the low-temperature oxidation process of coal, and show the change characteristics of the time series of various physical fields in detail. According to the gas emission and oxygen consumption of coal oxidation process, low-temperature coal oxidation can be divided into two stages, with 70 ℃ as the critical value. With the development of low-temperature coal oxidation, the frontier of coal oxidation reaction is moving to the region of high oxygen volume fraction.
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期刊类型引用(2)
1. 赵旭光，原海波，李辉. 煤自燃特性参数试验分析及自燃指标分级预警体系研究. 劳动保护. 2025(02): 84-86 . 
百度学术
2. 杨博，王昊宇，司俊鸿，程根银. 基于程序升温的沙曲一矿煤自燃特性实验研究. 华北科技学院学报. 2024(04): 49-55 . 百度学术
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