A beginner seeking advice; please help out, everyone
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I would like to ask: what are the differences between the two-stage and three-stage distillation processes for methanol, and what are their respective advantages and disadvantages? Thank you!
The three-column distillation process is more energy-efficient; by using the condensation heat from the vapor at the top of the pressurized column as a heat source for the reboiler at the bottom of the atmospheric column, steam and cooling water consumption can be reduced, resulting in an energy consumption that is 10–20% lower than that of the two-column process. It is capable of producing high-purity anhydrous methanol (99.95% or higher) without increasing methanol losses, with a methanol recovery rate of over 99% ； Separate organic impurities, particularly ethanol, from the methanol product without increasing the amount of methanol loss ； The heat source can be utilized efficiently. Reference: http://bbs.hcbbs.com/viewthread.php?tid=680948&highlight=%BC%D7%B4%BC%BE%AB%C1%F3
Search for the topic on your own – there are many results. In general, the three-tower system is energy-efficient, while the two-tower system requires fewer devices, is simpler to operate, and has lower investment costs