Regarding the gas-liquid contact in a packed tower, is it better to have the gas phase removed from the top of the tower or to introduce it at the bottom of the tower?
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Regarding the gas-liquid contact in a packed tower, is it better to have the gas phase removed from the top of the tower or to introduce it at the bottom of the tower?
For the tower, when drawing air from the top of the tower, there is negative pressure inside the tower； If air is blown in from the bottom of the tower, the pressure inside the tower is positive; from the perspective of gas absorption, it would be better to have a higher pressure inside the tower. For fans, the gas that is blown in from the bottom of the tower is untreated gas, while the gas that is drawn out from the top of the tower is clean, treated gas; therefore, the material choices may vary slightly. Consider it all together.
As for the tower itself, what filler to use is another matter. The basic principles of absorption towers and distillation towers are similar, but one thing is common to them: both require an upward flow of air at the point where it meets the liquid flowing downward. Whether it is \"inflation\" or \"extraction\", it is necessary to create a pressure higher at the bottom of the tower than at the top; only by establishing this pressure difference can gas flow. So this cannot be simply described as “insufflating” or “extracting”. If air is only blown in and not drawn out, overpressure will inevitably occur. Direct twitching without inflation will inevitably cause the tower to collapse. As for which one is better, it depends on the process conditions.
Thank you. In our case, we are building a small stripping tower to remove certain gases from the water
Thank you. In our case, we are building a small stripping tower to remove certain gases from the water
“Blow out some of the gas in the water”? It should be called “evaporation” or “distillation”, using gas to blow? Won’t more dissolve then? It is still recommended to provide a brief process description and indicate the name of the liquid/gas you are feeding in, to facilitate more detailed discussions.
It is a wastewater treatment unit with a treatment capacity of around 10 m3; its main function is to remove hydrogen sulfide and carbon dioxide from the treated clean water
This post was last edited by CHANGBAISHI on 2019-6-28 at 17:25. If carbon dioxide is to be used as the rising gas, it is better to blow it in, to avoid corroding the equipment at the outlet. Moreover, the pipes for export also need to be corrosion-resistant.