On the optimization of the number of trays and reflux ratio in Aspen distillation columns
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Regarding the issues of the optimal number of trays and reflux ratio: The optimal number of trays and reflux ratio are those that minimize the total cost of the equipment. Does everyone use the DSTWU model for simulation and plotting in order to find an appropriate value for these parameters? However, choosing a different point will result in different reflux ratios and the number of theoretical plates when using radfrac for simulation, although both methods can achieve the desired separation effect. For example, one I designed: it has 64 plates and a reflux ratio of 11, which meets the separation requirements ； A plate count of 70 and a reflux ratio of 5 are also sufficient to meet the requirements. . . . How can we determine which one is better?
Consider the cost, the material used for the trays, as well as the load on the reboiler; all of these need to be taken into account, along with R being 0.8 to 2 times Rmix
Reply to 2# wang1651: Oh, but we’re only responsible for the calculations; costs related to equipment and other operational expenses are handled by other people. It seems I’ll need to find out more about the specific materials used for the trays and their prices as well. Hehe
It’s actually a matter of the difference between equipment costs and operation costs; it needs to be calculated based on the specific expenses