棉花秆粉末掺混油泥制备成型颗粒的燃烧特性研究

COMBUSTION CHARACTERISTICS OF PRESSED PELLETS PREPARED BY COTTON STRAW BLENDED WITH OIL SLUDGE

为提高油泥与棉花秆低能耗掺混成型的资源化利用,将油泥与棉花杆粉末按不同比例进行掺配,在50℃下制备成型颗粒,开展热天平分析和成型颗粒燃烧失重实验,根据等温热分析双对数法进行动力学分析。结果表明:在50℃时棉花秆粉末与油泥即可实现成型,但密度比高温成型时稍小。炉温较低时,添加油泥降低了成型颗粒挥发分的析出和燃烧速度,炉温较高时却明显加速这一过程。纯棉花秆粉末在120℃条件下制备的成型颗粒燃烧反应活化能为75.12 kJ/mol,油泥添加后降低了反应活化能,当添加比例为20%时,燃烧反应活化能降低至34.46 kJ/mol。

To realize low energy consumption shaping of the cotton straw(CS) and energy utilization of the oil sludge(OS),the OS was evenly mixed into the CS powder with different proportions,then the pressed pellets were prepared at 50 ℃. Thermal balance analysis of powder and combustion weightlessness experiments of pressed pellets and kinetics analysis were carried out by double logarithmic(lnln)analysis. The results indicate that the mixed powder can be pressed into pellets at 50 ℃ once the OS blended into CS powder. The density of the pressed pellets prepared by mixed powder at 50 ℃ is lower than that of prepared at high temperature slightly. When the furnace temperature is low,the added OS may reduce the devolatilization and volatile matter combustion process. However,the high furnace temperature accelerates the process obviously. As the OS proportion rise from 0% to 20%,the combustion activation energy of the pellets decreased from 75.12 kJ/mol to 34.46 kJ/mol.