| Although, in large packed columns of sound service, high efficiency of the packing is important, the internals involved, especially liquid and vapor distribution unit, contribute a lot, sometimes crucial importance, to the whole work. That is, the high performance of the packing will be submerged without the aid of the sound distributors. With the development of packing of large voidity, low pressure drop and the wide application of large-diametered column with large diameter/bed depth ratio, the importance of gas distribution draws more and more attention.Previously, the design of gas-liquid apparatus is based on experiment and experience, which, without the support of theory, is now far apart from the need of large scale unit design. With the development of industrial design, the feasibility of on-site test and mind scale by experience is disappearing. Seeing this situation, this paper takes the study on gas phase flow field of a chimney-trayed vapor distributor. As for computational technology, the professional software GAMBIT is the tool to build three- dimensional structure grid, and standard k-εmodel is chosen to establish the Reynolds equation. Then, commercial CFD software FLUENT is programmed to simulate gas-liquid distributor with different gas distribution configuration to facilitate the comparison of theory and the measured. As experimental study on gas phase flow field of tray-type gas distribution structure, in the lab, a chimney-tray gas-liquid distributor with different configuration in the experiment tower is studied. At the end of the research, the data from the experiment note and that computed should reasonable fit.
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