An investigation of liquid maldistribution in trickle beds |
| |
Authors: | NA TsochatzidisAJ Karabelas D GiakoumakisGA Huff |
| |
Affiliation: | a Chemical Process Engineering Research Institute and Department of Chemical Engineering, Aristotle University of Thessaloniki, University Box 455, GR 54124 Thessaloniki, Greece b BP Oil,Refining Technology, Naperville, IL, USA |
| |
Abstract: | The influence of liquid maldistribution at the top of the packing on flow characteristics in packed beds of gas and liquid cocurrent downflow (trickle beds) is experimentally investigated. Particular attention is paid to the effect of gas and liquid flow rates on flow development. Tests are made in the trickling and pulsing flow regimes. A uniform, a half-blocked and a quarter-blocked liquid distributor is tested. Packings of various sizes and shapes are employed. Data are presented on pressure drop and liquid holdup as well as trickling to pulsing flow transition. Diagnosis of radial and axial liquid distribution is made by means of conductance probes. The effects of liquid foaming, bed pre-wetting, top-bed material, and blockage midway the bed on liquid distribution are also examined. Overall, liquid waves in the pulsing flow regime have a beneficial effect, promoting uniform liquid distribution in the bed cross section. |
| |
Keywords: | Trickle bed Liquid distribution Pulsing flow Hydrodynamics |
本文献已被 ScienceDirect 等数据库收录! |
|