炉前干馏过程中煤与热载体混合方式的研究

在热解反应器的上部设置混合段 ,在混合段内安装几层特制的挡板 ,固体热载体与煤颗粒在进入热解反应器之前先进入混合段 ,在挡板的作用下依靠重力进行快速分散、混合 ,然后落入反应器内进行热解反应 .实验在 1 kg煤～ 1 0 kg热载体的间歇粉煤快速热解反应装置上进行 ,并与用螺旋搅拌桨进行搅拌混合的热解实验结果进行了比较 .结果表明 ,在混合段内设置几层挡板是一种非常有效的混合方式 ,可以被用于炉前低温干馏过程 .

STUDY ON THE MIXING TYPE OF COAL AND HEAT-CARRIERS IN THE PROCESS OF LOW TEMPERATURE PYROLYSIS

Mixing sect is set at the top of the pyrolysis reactor. And four fanlike baffles with tapered constriction are equipped in it. Coal and heat-carriers are fed into mixing sect before flowing into the pyrolysis reactor. In the mixing sect coal and heat-carriers are dispersed and mixed quickly by the action of baffles under gravity. Experiments are carried out in the batch reactor of fine coal fast pyrolysis which scale is 1 kg coal and 10 kg heat-carriers. And the results are compared with the pyrolysis experimental results in which coal and heat-carriers are mixed by screw propeller. It shows that it is a very effective mixing type and can be used in the process of low temperature pyrolysis.