撒料装置对预热器换热管内压力损失影响的试验研究  

Investigation of the effect of dispersing equipment on pressure drop in the heat-exchange pipe of a suspension preheater

作　　者：刘文欢[1] 徐品晶[1] 陈延信[1] 李辉[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2014年第3期432-436,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家"863计划"资助项目(2003AA33X060)

摘　　要：根据气固两相流在预热器换热管内的运动规律,设计开发了三种不同结构参数的撒料装置.对装有三种撒料装置的预热器换热管内的压力损失进行了试验研究,结果表明:随着固气比Z的增大,换热管内压力损失均不断增大.在不同风速、不同固气比条件下,装载三种撒料装置都起到了分散粉体物料,减小换热管内压力损失的作用,2#撒料箱降低换热管压力损失的效果最显著,降阻幅度最大可达到30%;3#撒料箱的降阻幅度可达到20%;1#撒料箱最低,但仍可达到15%.随着固气比的增大,三种撒料装置降低压力损失的作用越明显.Based on the gas-solid two-phase flow motion theory in the heat-exchange pipe, three dispersing equipments of different structure parameters were designed. The construction of the pressure drop of the heat-exchange pipe and the influences have been investigated. The results indicated that the pressure drop is increasing with the increase of solid-gas ratio. It can be seen that each of the three dispersing equipments has the effect of dispersing the powder and decreasing the pressure drop in different superficial gas velocity and solids loading. No.2 dispersing equipment has the best effect in decreasing pressure drop, with the maximum amplitude to 30%; and the maximum amplitude of No.3 dispersing equipment to 20%. No. 1 has the weakest effectwhere maximum amplitude reached 15%. The effect of decreasing pressure drop by three dispersing equipments is becoming more obvious with the increase of the solid loading.

关 键 词：预热器 换热管 撒料装置 压力损失 固气比 

分 类 号：TQ170.2[化学工程—硅酸盐工业]