Page 170 - Packed bed columns for absorption, desorption, rectification and direct heat transfer
P. 170
165
Raschig Super-Ring
Third Generation (Late 1970's- 199O's}
CMR Ring Nutter Ring IMTP Ring Fleximax
Second Generation (Late 1950' s- Early 1970'si
Pall Ring Intalox Saddle
First Generation {1895 - 1950)
Raschig Ring Beri-Saddle
Fig. 11. Scheme of the history of development of the random packings after the time of Gay-
Lussac [321].
3.2.1.2.1.1.2. Equation for determination of the presswe drop
3.2.1.2.1.1.2.1. Presstire drop of dry packings
The pressure drop of a dry packing can be calculated using the
equation:
(6)
dk 2
where AP 0 is the pressure drop in Pa;