加压导向管喷动流化床气化炉气体扩散规律研究

A Study of the Gas Diffusion Mechanism in a Spout-fluidized Bed Gasifier with a Pressurized Guide Pipe

采用CO2 作为示踪气体在内径 2 0 0mm ,高 5m的全尺寸加压导向管喷动流化床中对床内气体扩散特性进行了研究 ,主要考察了操作参数 (喷动气流率、流化气流率、操作压力、颗粒粒径和物性参数 )对床内气体扩散的影响。归纳了喷动气旁路份额和流化气旁路份额随操作参数影响的试验关联式 。

With CO 2 serving as a tracer gas a study was conducted of the gas diffusion characteristics in a full scale (inner diameter 200 mm, height 5 m) spout fluidized bed with a pressurized guide pipe. Mainly investigated was the effect of operating parameters (spout gas flow rate, fluidized gas flow rate, operating pressure, particle diameter, physical parameters) on the gas diffusion in the bed. Deduced was an experimental correlation of the variation of spout gas bypass share and fluidized gas bypass share with the change of operating parameters. This can serve as reference data for engineering design calculations and practical operation.