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为了鉴定玉华长焰煤、安山不黏煤和华丰气肥煤这3种不同变质程度煤样的自燃倾向性,利用程序升温试验,建立了耗氧速率与煤体温度之间的阿伦尼乌斯公式并对其进行对数处理得到活化能方程,分析该方程的线性回归直线斜率并计算出煤样低温氧化表观活化能,再采用傅里叶变换红外光谱仪对煤样的表面分子结构进行了分析,揭示了不同变质煤样自燃倾向性差异的原因。结果表明:在3种试验煤样中,随着变质程度的加深,表观活化能呈现出逐渐增大的趋势,自燃倾向性降低;随着变质程度的加深,煤样表面分子结构中有利于自燃的基团减少,不利于自燃的基团增大,导致自燃倾向性逐渐降低。
In order to identify the spontaneous combustion tendencies of three kinds of coal samples with different degrees of metamorphosis, such as long-flame coal, non-stick coal from Anshan and coal from Huafeng, non-stick coal and Yufeng coal were used to establish the relationship between oxygen consumption rate and coal temperature Lennox formula and logarithmically processed to obtain the activation energy equation, analysis of the linear regression slope of the equation and calculate the apparent activation energy of low temperature oxidation of coal samples, and then use the Fourier transform infrared spectroscopy of the surface of the coal sample The molecular structure was analyzed and the reasons for the differences in the spontaneous combustion propensity of different metamorphic coal samples were revealed. The results show that the apparent activation energy shows a trend of increasing gradually and decreasing the tendency of spontaneous combustion. With the deepening of the degree of metamorphism, the apparent molecular structure of the sample surface is favorable Spontaneous reduction of the group is not conducive to spontaneous combustion of the group increases, leading to a gradual decrease in spontaneous combustion tendency.