Design issues of absorption towers
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Waste gas flow rate: 1500 m3/h; composition of the waste gas: acetic acid, **furan, methanol; concentration of the waste gas: 60 g/m3. Absorption towers are needed for recovery. Should I use a packed tower or a random packing design? When designing bulk packing, it is possible to use Ekt’s correlation diagram for calculations and look up values in tables; however, the flow rate of the liquid is required in these calculations. How can the flow rate of the liquid in the absorption tower be determined? Is there a design basis? Please give me some advice!
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I’ve just started working; please don’t laugh at me if I make mistakes. Different packed towers have different requirements regarding spray density. The tower diameter is determined by the volume and flow rate of gas; the spray volume is determined by the tower diameter and spray density; the feed rate is determined by material balance, which in turn determines the circulation volume. This is a rough estimate; I won’t do an exact calculation.
Could you give a specific calculation method? Are people currently using software or a large number of mathematical formulas for calculations?
I can’t do the calculations, but I know that software is needed – ASPEN, PRO2. They are used for process calculations.
Is there a place where software is available? You can find the relevant software there; please let me know
1. Selection between bulk and structured types: For small towers, as well as systems that are prone to clogging and have high corrosivity, bulk packing is a more suitable choice. 2 Determination of liquid flow rate: The absorption requirements of the process and the wetting limit of the packing determine the liquid flow rate. 3 When designing bulk packing, calculations can be carried out using Ekt’s correlation diagram