Design issues of packed towers
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Why are the packed absorption towers, which use water to absorb ammonia gas, designed with different diameters at the top and bottom? Could we analyze it from the perspectives of economy and gas-liquid phase compatibility?
The main reason is that ammonia gas is highly soluble in water; therefore, the diameter of such absorption towers is usually small. It is also necessary to maintain a certain amount of circulation, which is why there is a space at the bottom to store more liquid phase for use in this circulation process.
Is it related to the required amount of rising air volume?
The lower part serves a buffering function, while the upper part enhances the efficiency of mass and heat transfer in the medium as well as meets the requirements for absorption
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