How to calculate the theoretical total recovery rate of a atmospheric and vacuum distillation unit
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Due to design requirements, it is necessary to calculate the theoretical total extraction rate of the atmospheric and vacuum distillation unit. My approach is as follows: 1) First, use ProII to simulate atmospheric and vacuum distillation, and then calculate the theoretical stripping ratio based on the properties of the crude oil. 2) First, check whether the properties of the vacuum dewaxing oil match those predicted by theory; viscosity data is then used for verification, as there is a significant difference in viscosity between dewaxed and desulfurized oils. It is not clear, however, which software should be used to calculate the properties of the vacuum dewaxing oil when various crude oil types are mixed together. 3) Are there any other methods or software available to calculate a good theoretical pull-out rate?
There’s no need to go to the trouble of simulating a tower. Taking HYSYS as an example, based on the properties of crude oil distillation (other properties can also be added, depending on the data available), a crude oil stream is obtained; if there are multiple streams, they are generated separately and then combined. The theoretical draw rate is obtained by calculating the vaporization rate of the mixture flow based on the pressure at the bottom of the tower and the temperature at that location.