烧结矿余热回收竖罐内气体的流动特性  

Gas flow characteristics in vertical tank for sinter waste heat recovery

作　　者：冯军胜[1] 董辉[1] 李含竹 高建业[1] 

机构地区：[1]东北大学冶金学院,国家环境保护生态工业重点实验室,辽宁沈阳110819

出　　处：《中南大学学报（自然科学版）》2017年第1期1-8,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51274065);辽宁省科技计划项目(2015020074-201)~~

摘　　要：采用对Ergun型方程量纲一化的方法对气体通过烧结矿床层的压力降和流态进行研究,考察气体表观流速和烧结矿颗粒直径对床层内压力降及流态的影响。研究结果表明:当颗粒直径一定时,床层内单位料层高压力降随气体表观流速的增大呈二次方关系增大。当气体表观流速一定时,单位料层高压力降随颗粒直径的增大呈指数关系衰减。提出床层内临界颗粒雷诺数随颗粒当量直径变化的实验预测关联式,相对误差在±5%以内。提出床层内Forchheimer流区和湍流区的压力降实验预测关联式,相对误差均在±8%以内,显示良好的预测性能。The dimensionless method of Ergun＇s type equation was used to investigate pressure drop and flow regime of gas flow through bed layer. The effects of gas superficial velocity and sinter particle diameter on pressure drop and flow regime were studied. The results show that for a given particle diameter, pressure drop of unit bed layer height in sinter bed layer increases as a quadratic relationship with increasing gas superficial velocity. For a given gas superficial velocity, pressure drop of unit bed layer height increases as an exponential relationship with the increase of particle diameter. Experimental correlation is proposed for predicting the change of critical particle Reynolds number with particle equivalent diameter, and the deviation of the correlation is within ±5%. Experimental correlations are proposed for predicting pressure drop of Forchheimer zone and Turbulence zone in bed layer, and the deviations of the correlations are all within ±8%, showing good prediction.

关 键 词：烧结 填充床 压力降 流态 临界雷诺数 

分 类 号：TK115[动力工程及工程热物理—热能工程]