Abstract
AbstractIn a WFGD spray column, spraying droplets have dual duties of optimizing flow uniformity and providing interfacial area for mass transfer but have contradiction in selection of diameter. In this paper, a synergistic effect between smaller and bigger droplets is proposed to improve the performance of the column, which is to enlarge the interfacial area and optimize the flow uniformity in different layers, and it is used to create a novel design scheme. Through the study of the flow uniformity in the spray column, the detail of this design scheme is proposed as followed: The minimum flow rate and proper droplet diameter should be selected in the bottom layer to achieve the flow uniformity, and smaller droplets can be used in the rest layer to enlarge the interfacial area as much as possible. Compared with the traditional scheme, the liquid hold‐up has increased 16%–30%, and the interfacial area has increased 32%–56% in novel scheme. In practice, this novel design scheme can provide reference and guidance for large scale spray columns.
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