Glitsch CMR

Glitsch performance data for their Cascade Mini-Ring are shown in Figures 9-34A, B, and C for HETP with other published data and pressure drop for comparison with Pall rings and sieve trays. Note the abbreviation CMR stands for Cascade Mini-Rings. 

Figure 9-34A. Efficiency versus C-factor for various metai packings. Iso-octane/toluene, 740 mm Hg, reflux ratio 14 1,15-in. i.D. column, 10-ft bed height. Not Glitsch test data. Note CMR = Cascade Miniring . Used by permission of Glitsch, Inc., Bull. 345.

Figure 8.4 Third-generation plastic random packing , to) Cascade MiniRing (CMR ) (6) Hiflow ring. (Pori a, courtesy of Glitsch, Inc. port b, courtesy of Rauschert Industries, Inc.)...

Glitsch e rule of thumb (Table 8.6) for CMR random packings when the packing surface area exceeds 43 ft2/ft8. Both Ludwig (63) and the author like these rules, but they only apply to CMR 1, 1.5, and 2. To extend these rules to other packings, the author applied Schmidt s model (102). Equation (8.38) gives... 

The surface area per unit volume is about 75 for CMR 1 57 for CMR 1.5, and 45 for CMB 2. It is conceivable that Glitsch s rules are based on an average value of Op of about 60. Equation (8.40) will then become... 

This was confirmed by studies using CMR Glitsch rings, where the effective form factor cpp,exp = 0.437 exceeded the calculated value (pp,calc = 0.223 approximately by a factor of 2 [34, 35]. 

Figure 3-32. Resistance coefficient i]/ as function of Reynolds number of vapour or gas Rev, valid for random CMR Glitsch rings made of metal and plastic, various sizes...

Figure 4-24. Relative deviation S(Ap/H) of experimental data for determination of pressure drop (Ap/H)exp up to flooding point acc. to Eq. (4-49) and (4-54), valid for CMR rings by Koch-Glitsch made of metal and plastic. No. of system see Table 2 -2. Test conditions see Table 4-4.

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