旋转锥式热解炉内煤颗粒混合热解的实验研究

设计出一种旋转锥式煤热解炉,对炉内煤颗粒热解过程进行实验研究,测定了煤颗粒平均粒径、热解温度、旋转锥旋转速率及煤热解失重的关系.实验结果表明,随着煤颗粒平均粒径的增加、热解温度的降低和旋转锥旋转速率的减小,热解失重呈现出明显的下降趋势;此外,在煤颗粒中加入载热体,可促进煤颗粒热交换过程的传热效果,而且随着载热体混合量的增加使煤热解失重呈现增加趋势.研究结果有助于深入理解煤热解机理,为新型旋转锥式热解炉的深入研究和推广应用提供参考.

Experimental Study on Pyrolysis of Coal Particle-Heat Carrying Medium Mixtures in a Rotating Cone Reactor

A rotating cone shaped reactor has been designed for studying pyrolytic process of coal particles mixed with a heat carrying medium.The effects of the coal particles' mean size,pyrolysis temperature,cone's rotational speed and the proportion of the mixture on the coal's pyrolytic weight loss were tot determined.Experimental results show that the pyrolytic weight loss drops noticeably with increasing coal particle size,with reducing pyrolysis temperature and the cone's rotational speed.Moreover,addition of a heat carrying medium to the coal particles enhances the heat transfer effect within the mixture;the pyrolytic weight loss tends to increase with the heat carrier's increasing share.Study results are helpful for deepening our knowledge concerning the coal pyrolysis mechanism and may serve as a reference for further research on rotating pyrolytic reactors and be helpful for popularizing their application.Figs 8,table 1 and refs 11.