焦炭颗粒在循环流化床提升管中的浓度分布  

Coke particles in circulating fluidized bed riser of concentration distribution

作　　者：程文嘉 燕兰玲 刘梦溪 卢春喜 

机构地区：[1]中国石油辽河石化公司,辽宁盘锦124000 [2]中国石油大学(北京)化学工程学院,北京102200

出　　处：《石油化工》2017年第8期1065-1071,共7页Petrochemical Technology

摘　　要：在冷态提升管装置和热态工业循环流化床装置上,考察了表观气速和焦炭颗粒循环速率对提升管中部稳定区颗粒含率的影响。研究结果表明,冷态条件下焦炭颗粒循环速率较低(20~250 kg/(m^2·s)),提升管稳定区的颗粒含率小于0.12,且相同循环速率下,颗粒含率随表观气速的增大而减小;热态条件下焦炭颗粒循环速率较高(200~450 kg/(m^2·s)),在表观气速为10.50~13.20 m/s时,提升管稳定区颗粒含率小于0.35,并回归出冷热态条件下颗粒含率和极限颗粒含率的关联式。对冷热态相同表观气速和颗粒循环速率条件下的颗粒含率进行比较,工业装置的颗粒含率大于冷态实验的颗粒含率。The influence of gas rate and circulation rate to particles contain rate in the cold riser and the thermal industrial circulating fluidized bed were investigated. The experimental results show under cold experimental condition, circulation rate is lower（20-250 kg/（m^2·s））, particles contain rate is lower than 0.12, particles contain rate decreases with the gas rate at the same circulation rate; under hot experimental condition, circulation rate is higher（200-450 kg/（m^2·s））, when gas rate is in the range of 10.50-13.20 m/s, particles contain rate is lower than 0.35, also get a associated formula about particle contain rate and the maximum particle contain rate under cold and hot experimental condition. Particles contain rate of hot experiment is greater than that of cold experiment under the condition of the same gas rate and circulation rate.

关 键 词：循环流化床 颗粒含率 焦炭颗粒 

分 类 号：TQ032.41[化学工程]