Treatment of residual methanol on the trays after shutdown of low-temperature methanol washing
Thread Content
After the low-temperature methanol washing unit is shut down, if methanol needs to be recovered, what method is used to deal with the methanol remaining on the trays? I’d like some advice.
What needs to be done after shutting down low-temperature methanol washing? Generally, no liquid remains in the trays after shutdown. In other words, there is no liquid; if any is present, it’s only in small amounts. If a major repair is carried out, water replacement is required.
It’s easy to understand that a packed tower does not retain liquid, but it’s harder to understand why a plate tower also does not retain liquid. What is the principle behind this? Could you explain it in detail? Newbie, thank you.
The so-called tray liquid holding refers to the phenomenon where, with gas flow present, the gas holds back the liquid, enabling mass and heat transfer on the tray; meanwhile, the liquid flows down to the next tray through the downcomer, past the tray’s overflow weir. On the contrary, after parking, the liquid will flow down through the openings in the tray. The tray liquid collection tanks are equipped with weep holes during installation, to stop the inflow of liquid after shutdown. The liquid in the collection tank also flows down through the tears.
There are holes in the tray collection tank, so the liquid slowly drains down after the machine stops running
Where is the methanol-containing wastewater discharged during the water cycle, and is its volume particularly large?