Study Of Gas Distributor Used In Large-scale Desulfurization Packed Columns

Packed columns are widely applied to rectification and absorbabilityunit because they are high-efficient, lower pressure drop, big flux andflexible. With renewal of filler and the use of big-diameter packedcolumns and shallow bed packed columns and in-depth study in the column,more and more scholar realize that performance of the uniform distributioncan affect the column efficiency. Gradually people give up the opinionthat we can make the airflow itself uniform and put adhere more importanceto gas distribution.The paper is based on the technology of seawater desulfurization.Through experiment and CFD simulation to the test column, we compare theuniform distribution on the condition of setting grid-type distributorand on the condition of empty tower. We prove that the desulfurizationefficiency was affected by gas uniform through the desulfurization test.At the same time, we exploit three type distributors, which are simple,convenient in maintenance and suited to large-scale towers, and comparetheir performances and desulfurization efficiency;meanwhile we valuetheir merits and defects. Contrasting the simulation results and testresults, we find that these results are consistent. That illustrate CFDis an effective method in valuing gas distribution in packed column. Bysimulating to test column we find a suitable setting height for orificeplate. Furthermore, we simulate the practical packed column and comparethe effect on flow pattern in packed column that was installed three typedistributors mentioned above. We find an distributor suited tolarge-scale packed column and find a suitable distance between the floorof filler and the center of inlet. Enlarging the distance can make themisdistribution factor fall 20% percent in the column without gasdistributor.