液体分布器类型及催化剂布局对结构化多相反应器内液相混合特性影响的实验研究  

Study of influences of distributor design and catalyst block configuration on liquid mixing in multiphase monolithic reactor

作　　者：周媛[1] 陈亚岚[1] 刘辉[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《现代化工》2012年第8期92-96,98,共6页Modern Chemical Industry

基　　金：国家"973"计划(2006CB202503);教育部博士点基金资助项目(2006001005)

摘　　要：以空气和水为体系,采用示踪-响应实验方法,通过电导探针获得浓度-时间曲线,系统考察了在胞密度为400 cpsi的催化剂床层下,以喷嘴分布器和玻璃珠静态分布器为液体分布器的整体式和分段式结构化多相反应器的液相平均停留时间和轴向扩散程度。结果表明,对以喷嘴和玻璃珠静态分布器为液体分布器的整体式和分段式结构化多相反应器,液相平均停留时间基本上都随表观气、液速的增大而减小,但对分段式结构化多相反应器,在较大的表观气速下,平均停留时间随表观气速的变化有趋于一致的趋势。表观液速对平均停留时间的影响更大。以喷嘴为液体分布器的结构化多相反应器内的轴向扩散程度比以玻璃珠静态分布器为液体分布器的结构化多相反应器内的轴向扩散程度要小。为更好地减小轴向扩散,可在结构化多相反应器内设置多重分布段。In this article, the ＂tracer-response＂ c-t data in 400 cpsi monolith reactor at different gas-liquid flow was detected using conductivity probe technology, with nozzle and glass bead distributor as liquid distributor in water-air system. The average residence time and the degree of axial dispersion in the monolith reactor at different gas-liquid flow were detected simuhaneously. Results showed that the average residence time decreased with an increase in liquid flow, decreased with an increase in gas flow,the liquid flow was the main factor affecting the average residence time ;the degree of axial dispersion in integral monolith bed is larger than that in segmented monolith bed, so segmented configuration can reduce the axial dispersion in muhiphase monolithic reactor.

关 键 词：结构化反应器 轴向扩散 平均停留时间 

分 类 号：TQ021.4[化学工程]