Page 308 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

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3.2,2.2, Structured packing with boundary layer turbulizers (Turbo-pack)

3.2.2.2.1. Description of the structured packing with boundary layer turbulizers
The usage of thermopressed plates for honeycomb packings allows to
press on there walls special "turbulizers" of the mass tansfer boundary layer
[148-156] for intensification of the heat and mass transfer processes. A packing
block with such a construction is presented in Fig. 65.

Fig. 65. Block of a jacking with boundary layer turbulizers.

The investigated constructions of this type of packing are presented in
Table 31. All turbulizers are formed as horizontal grooves stamped in the sheets
so as to ensure an identical direction of the depressions of all grooves and
lamellas. The groove cross-section has the form of a semicircle with a 3 mm
diameter.

3.2.2.2.2. Performance characteristics of the packings with boundary layer
turbulizers

3.2.2.2.2.1. Pressure drop

3.2.2.2.2.1.1. Experimental data
The experimental data for the pressure drop of the packing PI5-235,
Table 31, are presented in Fig. 66 [153]. The data show that such a packing with
2 3
a specific surface area equal to 182 m /m is able to operate at liquid superficial
3
3
2
velocities to 0.11 m /(m s) (396 m /(m h)) and more. The gas velocity reaches
about 3.5 m/s at pressure drop about 20 mm water column per m packing
height. That is, the packing is able to operate at extremely high gas and liquid
superficial velocity at low pressure drop.