Simulation and Optimization of Defluorination and Desulfurization …
129
Fig. 4 Effect of liquid flow rate on volumetric mass transfer coefficient AK and CO 2 utilization.
(Color figure online)
filled tower, the more absorption liquid. When the liquid falls in the filler layer, the
liquid flow rate can improve the wettability of the filler, increase the mass transfer
area between gas and liquid in the filler layer, and effectively increase the absorption
rate . Considering the economic benefits of increasing the liquid flow rate, the liquid
flow rate of 10–12m
3 /h can be selected (Fig. 4).
Effect of Filler Type on Absorption Rate
It can be seen from Fig. 5 that the volumetric mass transfer coefficient and CO 2
utilization efficiency of the Bauer ring are higher than those of the step ring under the
same experimental conditions. This is because the filling density of the Bauer ring
is higher than that of the Stepped ring, which indicates that the Bauer ring has better
hydrodynamic performance as the filler. It can make the gas–liquid distribution in
the packing section more uniform, more residence time, greater mass transfer driving
force, better mass transfer effect, more thorough absorption reaction, and faster gas–
liquid mass transfer and absorption rate. Therefore, Bauer ring can be used as filler
in the experiment.
129
Fig. 4 Effect of liquid flow rate on volumetric mass transfer coefficient AK and CO 2 utilization.
(Color figure online)
filled tower, the more absorption liquid. When the liquid falls in the filler layer, the
liquid flow rate can improve the wettability of the filler, increase the mass transfer
area between gas and liquid in the filler layer, and effectively increase the absorption
rate . Considering the economic benefits of increasing the liquid flow rate, the liquid
flow rate of 10–12m
3 /h can be selected (Fig. 4).
Effect of Filler Type on Absorption Rate
It can be seen from Fig. 5 that the volumetric mass transfer coefficient and CO 2
utilization efficiency of the Bauer ring are higher than those of the step ring under the
same experimental conditions. This is because the filling density of the Bauer ring
is higher than that of the Stepped ring, which indicates that the Bauer ring has better
hydrodynamic performance as the filler. It can make the gas–liquid distribution in
the packing section more uniform, more residence time, greater mass transfer driving
force, better mass transfer effect, more thorough absorption reaction, and faster gas–
liquid mass transfer and absorption rate. Therefore, Bauer ring can be used as filler
in the experiment.