Vacuum distillation gas velocity
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How should the gas velocity in the gas phase tube be selected during vacuum distillation in a batch reactor?
First, the properties of the medium need to be considered, and then it is necessary to check whether the conductance meets the requirements. Analyze specific issues individually; otherwise it’s too general.
How is it generally calculated? Are there any relevant design standards or materials that cover this? I’ve been searching for a long time in chemical process design manuals but couldn’t find it. Do you know where it can be found?
The experience value requirement isn’t that strict; 20-30 m/s is sufficient
Is it that small? I calculated using 80 m/s, and the resulting liquid output is similar to that of the units produced previously; however, I’m not aware of any standards or design specifications regarding this
There are relevant descriptions in the HG20570 specification
For high vacuum, values of 50 m/s to 80 m/s can be achieved
HG/T 20570-95 Technical Specifications for the Engineering Design of Process Systems contains a dedicated chapter on the calculation of vacuum systems.