Strict calculations for the Aspen distillation column
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When using RAD-FRAC for the design calculations of plate columns, what determines the plate spacing? Because the plate spacing also needs to be entered when performing TRAY-sizing calculations; likewise, it is required when calculating fill towers. But what determines this value?
The spacing between packing columns is approximately 0.4–0.5 m; it can be determined based on the plate height data provided by the packing manufacturer. For tray columns, the spacing is typically 0.5–0.6 m, as determined by experience
For accurate calculations of distillation columns, during the process calculation phase it is not necessary to enter the structural dimensions of the column; only the number of theoretical plates needs to be provided. When performing hydrodynamic calculations on a tower, it is necessary to input the structural dimensions of the tower; for plate towers, this includes the tower diameter, plate type parameters, plate spacing, weir height, and the width of the liquid falling zone ； For a packed tower, parameters such as tower diameter, packing type, and plate height need to be entered ； Check the tower’s design manual; it contains detailed instructions.
In a packed tower, there is no such concept as plate spacing; instead, there is an equal plate height, which is a parameter used to describe the separation efficiency. In a tray tower, the design is based on the tower diameter, with approximate empirical values used; in reality, the design is determined by factors such as liquid flooding and mist entrainment, as well as ease of maintenance. What was said upstairs is correct; take a look at the tower design
Thanks for the help; it seems I still need to carefully read the manual for the tower equipment
I took a look at the comments and felt that, compared to my previous understanding, I gained some new insights