What data is needed for distillation tower design?
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What basic experimental data are needed to design a distillation column? Which of them are required and which are optional?
1. The total amount of materials entering the distillation tower, the molar concentration of each component, and the concentration requirements and flow rate of the top and bottom materials are used to facilitate the material balance of the entire tower, determination of the operating line, selection of tower height and tower diameter, etc. 2. The enthalpy of rising steam and distillate at the top and bottom of the tower is used to calculate the heat of the entire tower and determine the heat load of the top condenser and bottom reboiler. These are the main parameters. If there are any omissions, please ask an expert to add them.
The first is the gas-liquid balance data. Next is the physical property data of each substance. Finally, according to the design requirements, the design parameters are determined.
The operating pressure at the top of the tower and the pressure drop across the tower are also known. If it is determined to be a packed tower, the form of packing must also be selected.
What does this gas-liquid balance data include? You can't test a gas-liquid balance curve and come up with it, right?
Um~~~ What I mean is that if you want to design a distillation column, what data do you need to test to provide a basis for the design?
Measure the physical parameters of your medium. According to the specific requirements of your process, you need to know that the data of the medium are often mixtures, so you have to use experiments to determine them. Then design the packed tower based on these.
If the materials of your distillation system are conventional and not particularly unfamiliar substances or sensitive substances (military industry, drugs, etc.), professional software can be used to complete the process. You only need to tell the material composition and content, and the distillation requirements. Professional--that is, everything from process simulation to hydraulic calculations is done. No one does calculations by hand anymore. It is best to have professionals do it. Otherwise, you may not dare to use your own results, and your boss may not dare to use it either.
Well, what I do should be relatively unfamiliar. Most of the process simulation software does not have these things. The things calculated in this way need to be verified. The problem now is that if a tower needs to be designed, then those who need to provide experimental data as a reference for the design are to provide experimental data to professionals.
The most important thing is to obtain the vapor-liquid equilibrium data and then calibrate the binary interaction parameters in the simulation software. After the equilibrium simulation, hydraulic calculations are performed. Transfer properties such as density and viscosity are also best obtained experimentally.