结构化反应器床层中两相流动特性实验研究  

Hydrodynamic performance of multiphase monolithic reactors

作　　者：詹翔鹏[1] 许闽[1] 黄海[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：《北京化工大学学报（自然科学版）》2009年第5期18-22,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

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

摘　　要：以空气-水为介质，分别以喷嘴和填充直径1mm玻璃珠的30cm高的床层为分布器，在表观液速为0．0522-0．1306m／s，表观气速为0．0739～0．5171m／s，气液并流向下的操作条件下，测定了0．1m直径塔中。孔径分别为1．1和2．1mm的2种结构化催化剂床层中的总压降和液含率等流动参数。结果表明。床层总压降随着表观气速、表观液速的增大均增大。液含率随着表观气速的增大而减少，随着表观液速的增大而增大。通过对2种分布器的比较可以发现，相同条件下，以喷嘴为分布器的床层总压降和液含率比以玻璃珠为分布器的床层总压降和液含率小。比较2种床层可知，相同条件下，结构化催化剂的孔径越小，其床层总压降与液含率越大。此外，建立了能较好预测两相摩擦因子以及液含率的经验关联式，偏差在±15％以内。The total pressure drop and liquid holdup in two different monolith beds have been investigated experimentally in co-current downward flow with a reactor diameter of 0.1 m. The influences of superficial gas （0. 0739 - 0. 5171 m/s） and liquid （0. 0522 - 0. 1306 m/s） velocities, distributor type （nozzle distributor and glass distributor of 30 cm height and diameter of 1 mm packed with glass） and different monoliths （with channel diameter dh = 1.1 and dh = 2.1 mm） on the total pressure drop and liquid holdup were examined. The results indicated that the total pressure drop increased with increasing superficial gas and liquid velocities. The liquid holdup increased with increasing superficial liquid velocity, but decreased with increasing superficial gas velocity. For the same monolith bed, the total pressure drop and liquid holdup were greater when using the nozzle distributor. For the same distributor, the smaller the channel diameter, the greater the total pressure drop and liquid holdup. Two correlations were derived for predicting the two-phase friction factor and liquid hold. The predicted values were within ±15 % of the measured values.

关 键 词：分布器 结构化催化剂 压降 液含率 

分 类 号：TQ021.4[化学工程]