A question about tower design
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Recently, I used KG-TOWER to design a tower; the meteorological density was relatively high at 75 kg/m3, while the liquid-phase density was 426 kg/m3. The software issued a warning stating that the system pressure was too close to the critical pressure. It turned out that this software requires the liquid-phase density to be more than 8 times greater than the gas-phase density in order to avoid such a warning. I would like to ask experienced engineers: is this requirement applied when designing towers? ?
What is this of yours? Such a high vapor density?
The higher the gas phase density, the more likely mist entrainment will occur, and the empty tower gas velocity will be very low. I suspect the calculation of the gas density is incorrect; not to mention 75 kg/m3, even 7.5 kg/m3 is a very high value.
The operating pressure of my tower is relatively high, at 2.7 MPa.G; it is used for the separation of C4 and C2 compounds. The density of the lower trays in this tower is 75 kg/m3