Baffle tray columns

Figure 8-153. Simple side-to-side baffle arrangement, with liquid flow cascades, for baffle tray column. Used by permission. Fair, J. R., Hydrocarbon Processing, V. 72, No. 5 (1993) p. 75, Gulf Pub. Co., all rights reserved.

Example 8-42 Mass Transfer Efficiency Calculation for Baffle Tray Column (used by permission [211])... 

E. Baffle Tray Column (or, Termed Shower Deck, No Holes, Caps, or Other Contact Devices)... 

M, = average molecular weight of vapor, m = exponent for baffle tray columns. 

Baffle Tray Columns Baffle tray columns are similar to spray columns except that baffles are added to reduce backmixing. The... 

The internals for these columns have also been called splash decks or shower decks, descriptive terms to indicate the type of phase contacting expected. Vapor (or gas) flows upward through the baffle openings and there contacts the liquid showering down from one baffle to the next. Figure 12.42 shows a representative baffle tray column containing segmental baffles. 

FIGURE 12.42 Section of a baffle tray column, containing side-to-side segmental baffles. 

FIGURE 12.43 Flooding capacity of baffle tray columns. [J. R. Fair, 1993. Hydrocarbon Proc. 72 (5) 75.]... 

A model for predicting the efficiency of dualflow-type trays has been reported and is mechanistic in character. A large efficiency database, provided by Fractionation Research, Inc. (FRl), was used in constracting the model. Efficiency data for counterflow baffle tray columns are sparse, and the only model available is based largely on a heat transfer database, using the appropriate analogies. 

Figure 2.27. Baffle tray columns, (a) Disk and doughnut baffle column, (fc) Shower tray column.

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