鼓泡流化床稀相空间颗粒粒度分布的时变特性  

Time-varying characteristics of particle size distribution in dilute phase space in bubbling fluidized bed

作　　者：伍林 于化龙 胡霞[2] 余红杰 彭威 魏耀东 WU Lin;YU Hualong;HU Xia;YU Hongjie;PENG Wei;WEI Yaodong(Faulty of Engineering,China University of Petroleum-Beijing at Karamay,Karamay 834000,China;Department of Mechanical Engineering,Karamay Vocational and Technical College,Karamay 834000,China;Patent Examination Cooperation Sichuan Center of the Patent Office,Chengdu 610056,China;CNPC Chuanqing Drilling Engineering Company limited,Chengdu 610056,China)

机构地区：[1]中国石油大学(北京)克拉玛依校区工学院,新疆克拉玛依834000 [2]克拉玛依职业技术学院机械系,新疆克拉玛依834000 [3]国家知识产权局专利局专利审查协作四川中心,四川成都610056 [4]中国石油川庆钻探工程有限责任公司,四川成都610056

出　　处：《中国粉体技术》2023年第3期12-20,共9页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:21776305。

摘　　要：鼓泡流化床稀相空间的催化剂颗粒粒度分布一方面与流化床流化速度有关,另一方面与流化床中藏量的细小颗粒跑损有关,即随着流化床操作的连续进行,流化床系统中的细颗粒不可避免的存在跑损,进而影响到稀相空间的颗粒粒度分布。由于这种跑损是连续发生的,因此稀相的颗粒粒度分布变化具有时变特性。选用催化裂化平衡催化剂和二维流化床,在连续流化操作过程中采集稀相空间中的颗粒样品,分析颗粒的粒度分布,考察稀相空间中颗粒粒度分布随流化操作时间的变化。结果表明:随着流化床系统中细颗粒的跑损,稀相颗粒粒度分布的中位粒径和峭度逐渐增加,稀相空间的颗粒逐渐粗化,经过一段流化操作时间后颗粒粒度分布变化趋于稳定。The panicle size distribution of catalyst in the dilute phase space of a bubbling fluidized bed is related to the fluidization velocity of the fluidized bed,and also related to the loss of fine particles in the fluidized bed.As the fluidization process operates continuously,the fine particles loss inevitably from fluidized bed,which directly influences the particle size distribution in the dilute phase space.Therefore,the particle size distribution in the dilute phase space has a time-varying characteristic.In this work,catalytic cracking balance catalyst and two-dimensional fluidized bed were selected to collect particle samples and analyze the particle size distribution in the dilute phase space,investigate the particle size distribution varying with time during the continuous fluidization.Experimental results show that the particle size distribution in the dilute phase space become coarser,median particle size and kurtosis become bigger with fine particle loss and tends to be stable after a period of operation.

关 键 词：鼓泡流化床 稀相空间 粒度分布 时变特性 催化剂 

分 类 号：TQ051[化学工程]