煤中原始水分对煤自燃影响的绝热氧化试验研究

发布时间：2018-03-19 15:10

本文选题：原始水分　切入点：绝热氧化　出处：《中国煤炭》2016年05期 　论文类型：期刊论文

【摘要】：为研究煤样中原始水分对煤自燃的影响,对同一煤样的干燥煤样和新鲜煤样进行了绝热氧化试验。通过对试验数据的处理分析发现新鲜煤样在自然升温过程中确实存在一个水分蒸发阶段,该阶段内温度无规律地上下波动、升温缓慢,能延缓煤自燃进程。通过对煤自燃动力学参数分析,拟合得出了两类煤样的ln((dT)/(dt))和-1/(RT)关系,干燥煤样的ln((dT)/(dt))和-1/(RT)基本呈线性关系,新鲜煤样则只在水分蒸发阶段前呈线性关系。干燥煤样和新鲜煤样在低温时期的活化能基本相同,即煤样原始水分对煤自燃倾向性鉴定没有影响。
[Abstract]:In order to study the effect of raw moisture in coal sample on coal spontaneous combustion, The adiabatic oxidation tests of dry and fresh coal samples from the same coal sample were carried out. Through the analysis of the test data, it was found that there was a phase of water evaporation in the natural heating process of the fresh coal sample. In this stage, the temperature fluctuates irregularly up and down slowly, which can delay the process of spontaneous combustion of coal. By analyzing the kinetic parameters of coal spontaneous combustion, the relationship between the two types of coal samples is fitted, and the relationship between the two types of coal samples is obtained. The relationship between the dry coal samples and the dry coal samples is basically linear, and there is a linear relationship between the two types of coal samples. The activation energy of dry coal sample and fresh coal sample at low temperature is basically the same, that is to say, the original moisture of coal sample has no effect on the determination of coal spontaneous combustion tendency.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;
【分类号】：TD752.2

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