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一种计算煤自燃耗氧速率的新方法(英文)
An innovative method to calculate oxygen consumption rate
【摘要】 根据煤自燃的热量传导和传质特性、阿伦尼乌兹公式和Ranz-Marshall方程,提出了一种估算煤在高温自燃耗氧速率的新方法。与传统方法相比,该方法不仅考虑了煤的自燃动力学特性和温度,还包含了煤粉的环境气流特性和粒径,并通过煤自燃程序升温实验与理论结果的对比,表明该方法计算的氧耗速率与实验结果一致,验证了该方法的有效性。
【Abstract】 Based on heat and mass transfer characteristics of spontaneous combustion of coal, Arrhenius equation and the Ranz-Marshall correlation, a novel approach was proposed in this paper to estimate oxygen consumption rate of self-ignition of coal at high temperature. Compared with the conventional methods, this approach involves not only kinetic properties of self-ignition of coal and temperature, but also the ambient air flow characteristics and diameter of coal particle. To testify the proposed approach, oxygen consumption rates at high temperature were measured by the programmable isothermal oven experiments. Comparisons between experimental and theoretical results indicate that the rates of oxygen depletion calculated by the proposed approach agree well with those measured from laboratory-scale experiments, which further validates the proposed approach.
【Key words】 self-ignition of coal; oxygen consumption rate; oxygen transport; timescale; critical temperature; programmable isothermal oven experiment;
- 【文献出处】 Journal of Central South University ,中南大学学报(英文版) , 编辑部邮箱 ,2019年04期
- 【分类号】TD752.2
- 【被引频次】1
- 【下载频次】90