I am not saying that is easy to program this, I am just saying the way it works, and it is the same way you would do the calculation by hand. Remember that Our grandpa did not have computers and software to do plant design.
If you do not have a commercial process simulation software to practice I will give you two options.
And the second one is Coco, developed by Jasper von Baten. Both software is free to download and use and very similar to Aspen Plus where you need to run your simulation to verify the results.
DWSim also has some exclusive features for Patrons, mobile options and so on, but in general terms, you can use it in your computer without extra content to get familiar with plant design. As free software, its developers are not able to spend thousands or millions of dollars is the process simulation development. For that reason, it may not have a so easy interface or more complex options than other commercial software.
After mastering the basics of a distillation separation process and its performance the simulator also gives an ability to understand the need and power of a process control. The users can fearlessly play with the distillation column, change PID control loop tuning parameters in real-time without no possibility of process or plant problems or a shutdown. PiDISTILL, as practical distillation column simulator can mimic all typical behaviors of a distillation process providing valuable knowledge, understanding and experience which students can directly use in any separation industry.
With increasing emphasis on training, safety, reliability, and stricter government regulations, PiDISTILL is expected to be a required software module in modern chemical engineering subjects and laboratories for all technical universities and colleges worldwide. Schedule A Demo First Name. With Prode Properties you can easily solve staged columns with one or more feeds and one or more side streams, this Excel application example shows how to specify inputs and print in Excel a detailed table with results.
In this page you can define different kind of columns, distillation columns with reboiler and condenser, absorbers etc. Once the column has been defined it is suggested to verify the input data specifically for inconsistent specifications, if you are sure that all is Ok run the solver button Solve Column.
The design of a distillation column involves many parameters: product compositions, product flowrates, operating pressure, total number of trays, feed tray location, reflux ratio, reboiler heat input, condenser heat removal, column diameter, and column height. A rigorous degrees-of-freedom analysis involves counting the number of variables in the system and subtracting the number of equations that describe the system. A typical situation in distillation design is that the feed conditions are given: flowrate, composition, temperature, and pressure.
The desired compositions of the product streams are also typically known. Whatever process simulator software you are using Hysys, Aspen Plus, ChemCad, Pro II , the first step is to open a blank worksheet and add a pieces of process equipment: column, condenser, reboiler as part of the column or separate , pumps and valves and add a streams between them.
Optionally, you can also define accumulation vessel for the condensate. Most of the software packages will suggest the thermodynamic property package that suits defined components. If you do not have any specific knowledge or requirements, it is best to use the suggested thermodynamics package. The input streams to the process must be specified.
In a simple case, as the basic column described above, there is only one input stream, the column feed stream. The flowrate, composition, temperature, and pressure of this stream must be specified. If you are using any additional input streams such as steam for heating or additional feed, then those streams need to be specified as well. The parameters for all the equipment included must be specified by opening equipment icons and defining necessary data.
If you do not have any specific data or requirements, it is appropriate to make the assumptions that both pumps will generate a pressure difference of 5 bars between suction and discharge. So, make the specification for both pumps in accordance.
The pressure at the exit of the feed valve must be equal to the pressure on the feed tray. We do not know exactly what this is at this point, but we will make an assumption and define it as slightly higher than expected to be on a safe side for the calculation purposes.
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