AKTS模拟分析龙口油页岩与半焦混烧动力学特性

Research on combustion characteristics of Longkou oil shale and semi-coke based on AKTS

利用热重分析仪对龙口油页岩与其500℃半焦按照不同比例混合燃烧时着火温度和燃烧特性进行探究考察。基于3种升温速率下燃烧试验所对应的TG-DTG曲线,整个燃烧过程可分为3个阶段,分别为水析出阶段、燃烧低温段和燃烧高温段。不同比例样品的燃烧特性参数随掺入的页岩比例增大呈现出增大的趋势。利用AKTS-Thermokinetics软件对实验得到的DTG数据分析,对比实验曲线与模拟曲线,并进行反应动力学的计算。基于计算结果发现,随着样品中油页岩的比例增大,活化能呈现出先减小后增大的趋势。综合各样品燃烧特性参数,发现页岩与半焦比例2∶1为当前燃烧试验最优混合比。

Thermo-gravimetric analysis was performed to study influence on ignition temperature and combustibility index during blended combustion of Longkou oil shale and 500℃ semi-coke at the different blended proportions. Based on the TG-DTG curves, the whole combustion process was divided into three combustion reaction stages, that is, water precipitation stage, low-temperature stage and high- temperature stage. The results reveal that there is a tendency to increase for the combustion release index with increasing the ratio of the oil shale. Furthermore, dynamic calculation is carried out by AKTS- thermokinetics software. Compare experimental curves with the theoretical simulation curves. Based on the results, it found by the proportion of oil shale samples increased, activation energy first decreases and then increases. Comprehensive each sample combustion parameters, shale and semi-coke ratio of 2 ： 1 is found as the current combustion test the optimal mixing ratio.