Original Title: Aspen Premium Case | Batch Distillation This paper introduces the basic operation and analysis process of batch distillation simulation. 1 Introduction to batch distillation Batch distillation is a common chemical unit operation, which is widely used in the separation process of specialty chemicals, pharmaceuticals and other fields. Compared with continuous distillation, batch distillation is a kind of separation technology which can effectively separate small batches of substances and has very flexible operation flexibility. Simulation method of batch distillation Simulation of batch distillation can be carried out either in the independent Aspen Batch Modeler of AspenTech or in the batch distillation module BatchSep of Aspen Plus. Personally, I feel that it is more convenient in Aspen Plus, so this article will use Aspen Plus to simulate. Expand the full text 3 Example of batch distillation 1) Definition of components and physical properties Open the Aspen Plus program and go to Aspen Properties to enter the components tetrahydrofuran and water Select the NRTL property method to view the interaction parameter Run Aspen Properties to complete the property definition section. 2) Establish process Enter Simulation, select the batch distillation module BatchSep in the module and draw a simple flow chart. Enter the composition information for Feed F 3) Input structure data Click Blocks-B1-Main to start defining the structure information of the batch distillation column. 1) Click Configuration, select Batch distillation column, and set the number of trays to 20 2) Click Pot Geometry to define the structure of the heating kettle. There are three definition methods (diameter + height; diameter + volume; height + volume). Here, the experimental distillation column is taken as the standard, and the second mode is selected, with the diameter of 0.1 m and the volume of 1 L. 3) Click OverHead to set the condenser at the top of the tower, rotovap distillation ,cbd centrifugal extractor, and select the total condenser here. And click Reflux to set the reflux ratio 4) Click Heat Transfer to set the heating method. Select the default heating method here. 5) Click Jacket Heating to define the heating load, which is set as 0.1 KW here. 6) Click Pressure/Holdups to set the pressure drop and liquid holdup. 7) Click Receivers to set the number of receivers, which is set as 1 here. 4) Input operation steps Click Initial Conditions and input the initial feeding amount (the amount of material added to the batch distillation still). Click OperatingSteps to define the operation process and create a new operation step Select End Condition to set the termination condition, and set the termination after 3 H of batch distillation. At this point, the basic conditions are set, and you can run to view the results. 5) Result analysis Click Time Profile-Composition, select Condenser to view the real-time composition of the liquid phase condensed from the condenser, and select Pot to view the real-time composition of the bottom of the column You can also click on Holdup to see the amount of distillate collected at the top of the tower in real time. This is a small example of batch distillation with Aspen Plus. According to the actual situation, the structure and operation parameters of batch distillation column (including tray number, column bottom size, column pressure, heating load, addition, termination conditions, etc.) Will be different, but the basic operation process and analysis ideas are similar. Chemical industry has never been so wonderful. — Chemical Frontier,wiped film distillation, Chemical Application, Chemical Information, Learning Exchange — Return to Sohu to see more Responsible Editor:. toptiontech.com