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Liquid-Gas
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Macro level mixing - Physical processing
Macro-level mixing topics covered here describe how the
flow pattern generated by the impeller or impellers affects the dispersion
of gas bubbles within the vessel. The discussion of the quality of the gas
distribution, which includes flooding, minimum, intermediate, and uniform
gas distribution, belongs here. The description of the sparging or gas
introduction device and how it affects gas handling is also a topic here.
Spargers include sparge pipes, lances, sparge rings, sparge plates and caps, and
shaft induction spargers. Other parameters that affect the gas dispersion
are impeller power, isothermal gas expansion power, superficial gas velocity,
specific volumetric gas flow rate (vvm), pressure, and temperature. The gas
hold-up is also a major topic in this mixing category. Boiling
is quite different from the dispersion of a continuously forced gas stream, but
also is discussed here.
We are currently in the process of updating the mixing forum. Please check back here at a later date for more information.
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