文献类型：期刊文献

中文题名：轴径向二维流反应器中催化剂封内流动特性的研究

英文题名：Flow Properties in the Catalyst Sealing of an Axial-Radial Flow Reactor

作者：李瑞江[1];吴勇强[1];朱子彬[1]

机构：[1]华东理工大学大型工业反应器工程教育部工程研究中心,上海200237

年份：2010

卷号：24

期号：3

起止页码：395

中文期刊名：高校化学工程学报

外文期刊名：Journal of Chemical Engineering of Chinese Universities

收录：CSTPCD;;EI(收录号：20102713051808);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：中国石油化工股份有限公司资助项目(101034;407032)

语种：中文

中文关键词：轴径向流;反应器;催化剂封;流场

外文关键词：axial-radial flow; reactor; catalyst sealing; flow field

摘要：在高7m、直径3m的轴径向二维流反应器冷模装置上考察了催化剂封内流体的流动行为,并采用二维流动模型进行了模拟和剖析。研究结果表明,轴径向二维流反应器催化剂封区内存在轴向和径向流并存,且以轴向流为主的二维流动特性。催化剂封区内流体的停留时间受催化剂封高影响显著:封高为0.5m时,通过催化剂封顶部的流量达到6.5%,但最短停留时间仅为床层主体的一半;封高为1.6m时,通过催化剂封顶部的流量为3.1%,但最长停留时间达到床层主体的6倍多。限流区的设置可对催化剂封区内的流场分布作微调,并不改变床层主体的停留时间分布,当限流比为25%时,催化剂封内最短停留时间可提高30%,最大停留时间仅提高10%。适宜的催化剂封高的设置是保证催化剂封利用率和反应器安全性的关键。
The flow properties of fluid in the catalyst sealing of an axial-radial flow reactor were studied in a cold experimental plant with 3 m diameter and 7 m height. The two-dimensional flow model was also used to simulate and analyze the flow properties of the fluid in the catalyst sealing. The results show that both the axial and radial flow are coexisted and the axial one is dominate in the catalyst sealing of the axial-radial flow reactor. The effect of the catalyst sealing height on the residence time of the fluid in the catalyst sealing is significant. When the height of the catalyst sealing is 0.5 m, there is 6.5% of outflow flowing through the top of the catalyst sealing, and the smallest residence time of the fluid in the catalyst sealing is half of that in the main catalyst bed. When the catalyst sealing height is 1.6 m, there is 3.1% of outflow flowing through the top of the catalyst sealing, and the longest residence time of the fluid in the catalyst sealing is six times of that in the main catalyst bed. Setting a catalyst limiting zone can finely change the flow field distribution, but does not affect the residence time of fluid in the main catalyst bed. Compared with the situation of without setting limiting zone, when the distributor perforated ratio of the set limiting zone is 25% of that of the main catalyst bed, in the catalyst sealing the smallest residence time increases by 30% and the longest residence time increases only 10%. An appropriate height of the catalyst sealing is the key factor for the application efficiency of the catalyst sealing and the safety of the reactor.