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Comment PDF Separation Processes

Dry-Tray Pressure Drop of Sieve Trays Revisited

By Dan Summers, Sulzer and Tony Cai, FRI |

Data points from literature are refined into a single correlation defining dry-tray pressure drop in sieve trays The sieve tray has been in the marketplace as a distillation device for many decades. It has been used extensively on distillation tray equipment worldwide as a highly efficient vapor- and liquid-contacting device (Figure 1). Many people have previously examined dry-tray pressure drop data for sieve tray decks, including the authors of this article. Ref. 1 is an article correlating the data from literature into an equation (Dry Tray Pressure Drop of Sieve Trays). However, Ref. 1 leaves the “door open” for additional refinement of this correlation for those applications that might have high ratios of tray thickness ( TT) to hole diameter ( Dp) — for instance, tiny-hole applications in aluminum, as has been practiced in air separations processes. Ref. 2 is a recent presentation on this subject, covering the use of computational fluid dynamics (CFD) for very thick trays. This article combines Refs. 1 and 2 into a single definitive correlation for the dry-tray pressure drop of sieve trays. An improved correlation with the proper functionality for the dry-tray pressure drop of sieve trays is presented here. It incorporates…
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