Fractionator Souders-Brown

Souders-Brown. The Souders-Brown method (References 1, 2) is based on bubble caps, but is handy for modem trays since the effect of surface tension can be evaluated and factors are included to compare various fractionator and absorber services. These same factors may be found to apply for comparing the services when using valve or sieve trays. A copy of the Souders-Brown C factor chart is shown in Reference 2. 

Trays, fractionating assembly of sieve trays, 428 bubblecap, 428,430-433 capacity, F-factor, 429 capacity, Jersey Critical, 432 capacity, Souders-Brown, 432 cartridge, 428 design data sheet, 429 dualflow, 426 efficiency, 439-456 Linde, 430 ripple, 426 sieve, 428,429 turbogrid, 426 types, 426 valve. 429.430.432 Trickle reactors, 576, 607 Tridiagonal matrix, 407 Trommels, 335... 

Entrainment flooding is predicted by an updated version of the Souders and Brown correlation. The most popular is Fair s (1961) correlation (Fig. 20), which is suitable for sieve, valve, and bubble-cap trays. Fair s correlation gives the maximum gas velocity as a function of the flow parameter (L/G)V(Pg/Pl), tray spacing, physical properties, and fractional hole area. 

Souders, M. and Brown, G. G. (1934) Ind Eng Chem. 26, 98. Design of fractionating columns. Strigle, R. E. (1994) Random Packings and Packed Towers Design and Applications, 2nd ed. (Gulf). 

A fractionating tower must have sufficient cross-sectional area to handle the rising vapors without excessive carry-over of liquid from tray to tray. The maximum allowable vapor velocity, applicable for any specific location in the column is given by Souders and Brown as follows ... 

As an alternative to the continuous countercurrent model an equilibrium stage model of the adsorptive fractionation system exists (Chinget a/. 1985). In effect the concentration ratio cl/co for each column is represented by the well-known equation (Kremser 1930, Souders and Brown 1932) ... 

Diameter of Bubble Towers. It is evident from the foregoing that no simple method of establishing the diameter of a fractionator is possible. Perhaps the maximum in simplification is tfie preparation of charts similar to Fig. 16-11 or 16-12 for the situation at hand, or for a number of common situations. Nevertheless, some rapid means of approximation is useful, so the familiar Brown and Souders equation (16-8) will be used. This equation was originally based on entrainment, but some doubt has arisen regarding its relationship to entrainment. The equation was also related to surface tension of the liquid, and this concept has also been discredited.Finally, everyone agrees that the K constants... 

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