Packing vs.trays

Of the above parameters, the ability to increase gas/liquid contact will always result in higher absorption efficiency in a wet scrubber. If temperature can be reduced and the liquid-to-air ratio increased, then the absorption efficiency will also be improved in the scrubber. The actual design of the tower (diameter, height, depth of packed bed, etc.) will also depend on the given vapor/liquid equilibrium for the specific pollutant/scrubbing liquor. Additionally, the type of tower (packed vs tray, and so on) used will affect this equilibrium. The design of wet scrubbers is not covered in this chapter, but design examples can be found elsewhere in the literature (14). 

FIGURE 12.70 Generalize(f comparison of capacities, structure(f packings vs. high-capacity trays. [J. L. Bravo, 1998. Chem. Eng. 105 (2) 77.]... 

Trays vs. Random Packings The following factors generally favor trays compared to random packings, but not compared to structured packings. 

Comparison with Trays. The pressure drop for a tray with 0.61-m spacing was found to be 58.4 mm liquid. The comparative packing pressure drop is 66(0.61) = 40.3 mm liquid. The diameter for the packed column is 3.21 m vs. 3.36 m for the trays. If a lower approach to flood for the packing is used, to make the column diameter 3.36 m, the packing pressure drop becomes less than half that of the trays. 

Trays vs. Packing In Selective Treating with 50% MDEA Solution... 

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