Comparison between packed towers and plate towers

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For many counter-current contact processes, both packed towers and plate towers can be used. Different tower types have their own advantages and disadvantages, and a choice should be made based on a comprehensive consideration of the process system. 　　⑴The operating range of a packed tower is limited, and it is particularly sensitive to changes in the liquid load. 　　⑵Packed towers are not suitable for treating materials that are prone to polymerization or contain solid suspensions. 　　⑶Packed towers are not suitable when cooling is required during the gas-liquid contact process to remove reaction heat or heat of solution. Furthermore, when there is a side-line discharge, packed towers are also less convenient than plate towers. 　　⑷The diameter of a packed tower can be quite small, but the diameter of a plate tower is generally not less than 0.6 m. 　　⑸Design data for plate towers is more readily available and more reliable, allowing for smaller safety factors. 　　⑹When the tower diameter is not very large, the cost of a packed tower is low. 　　⑺For systems prone to foaming, a packed tower is more suitable. 　　⑻For corrosive systems, a packed tower is more suitable. 　　⑼For thermosensitive systems, a packed tower is preferable. 　　⑽The pressure drop of a packed tower is lower than that of a plate tower, making it more suitable for vacuum operations.