煤粉和油页岩颗粒流化行为研究  

Research on fluidization behavior of pulverized coal and oil shale particles

作　　者：李国智 王松江 张振千 LI Guozhi;WANG Songjiang;ZHANG Zhenqian(Luoyang R&D Center of Technologies,Sinopec Engineering(group) Co.,Ltd.,Luoyang 471003,China)

机构地区：[1]中石化炼化工程(集团)股份有限公司洛阳技术研发中心,河南洛阳471003

出　　处：《洁净煤技术》2018年第6期66-70,共5页Clean Coal Technology

摘　　要：为了研究煤粉和油页岩颗粒流动特性,在直径400 mm、300 mm循环流化床冷模试验装置上,考察了不同操作条件下煤粉和油页岩细粉物料的流化性能,并对煤粉、油页岩粉的流化特性进行了对比。结果表明,油页岩粉物料的起始流化速度约0. 043 m/s,煤粉物料约0. 023 m/s;油页岩粉的小颗粒带出速度约0. 7 m/s,煤粉约0. 6 m/s,2种物料的大颗粒带出速度约1. 4 m/s。床层表观气速在0. 1～0. 7 m/s时,床层密度沿床层高度有所降低,其中油页岩粉床层密相密度为800～350 kg/m^3,煤粉床层密相密度为750～300 kg/m^3。在提升管内随提升管高度的增加和表观气速增大,床层密度表现为由下至上逐渐降低,有一定波动的S形分布,提升管内床层密度为20～110 kg/m^3。To clarify the flow characteristics of pulverized coal and oil shale particles,the different operating conditions of these irregular fine powder were investigated in this study base on a set of circulating fluidized bed cold model test equipment with diameter of 400 mm and 300 mm.Meanwhile,the fluidization characteristics of pulverized coal and oil shale particles were also compared.The results show that the initial fluidization velocity of the oil shale powder and pulverized coal are about 0.043 m/s and 0.023 m/s,respectively.The small particle take-out velocity of oil shale powder and pulverized coal are about 0.7 m/s and 0.6 m/s.Likewise,the velocity of the large particles take-out velocity of two kinds of materials are about 1.4 m/s.Additionally,the bed density decreases along the bed height when the apparent gas velocity of the bed layer is between 0.1 m/s to 0.7 m/s.In that case,the density of oil shale bed is between 800 kg/m^3 and 350 kg/m^3 ,and the density distribution of pulverized coal bed is ranging from 750 kg/m^3 to 300 kg/m^3 .With the increase of the height of the riser and superficial gas velocity,the density of bed layer in the riser decreases from the bottom to the top,and it demonstrates a certain fluctuation similar S shape.In addition,the density of the bed layer in the riser is between 20 kg/m^3 and 110 kg/m^3 .

关 键 词：煤粉 油页岩粉 循环流化床 冷模试验 

分 类 号：TQ534[化学工程—煤化学工程] TK16[动力工程及工程热物理—热能工程]