Physical Simulation of Bubble Behaviors and Optimization …
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Number of bubbles
Diameter(mean)/mm
e=0
e=0.2
e=0.4
Fig. 10 Bubble size distribution under different eccentric stirring. (Color figure online)
(a) 0.06m
3
/h
(b) 0.09m
3
/h
(c)0.12m
3
/h
(d) 0.15m
3
/h
Fig. 11 Static images of bubbles with different inlet gas flow
to the increase of gas flow rate, which increases the speed of bubbles rushing to the
liquid surface, and makes small bubbles merge to large bubbles after splitting.
Effects of the Height of Agitator
When the stirring speed is 600 r/min, the inlet gas flow is 0.12 m
3 /h, and eccentric
stirring is 0.4, and the agitator is SSB-D, inquiry into effects of three height of agitator
on the micro-bubble.
It can be seen from Fig. 13 that the height of the agitator from the bottom of the
reactor has little effect of micro-bubble. When the height of agitator is 2 and 3 cm,
the dead zone in the reactor is smaller. When the height of agitator is 4 cm, the
bottom left of the reactor the end dead zone is larger. According to Fig. 14, it can be
seen that the average bubble size is mainly distributed between 0.5 and 3 cm. When