Page 314 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

300

0 4 • 0
w* ° * r * t
1.0 am o T - • a n n 1 * '
o.g
10 20 30 40 50
Lp L/(w ap B)

Fig. 71. Loading point ki, values for different packinp {Table 31).

3.2.2.2.2.2. Dynamic holdup of packings with boundary layer turbulizers
The investigations of the dynamic holdup are carried out [154] for all
packings presented in Table 31. Some experimental data are represented in Figs.
72 and 73.

• - PO-117
*- P15-117
• - P7.5-117
- - P3.75-117
10

Fig. 72. Holdup of packings with h= 117 mm, and different distances between the turbulizers vs.
liquid superficial velocity L in the absence of gas flow.

The value of the dynamic holdup of the packing is presented [154] as a
sum of the holdup under the loading point (H^ and an additional holdup
(AH d) due to the forces between the gas and the liquid phase, For calculating
each of them, the following equations are proposed.