Special solid-liquid separation
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This post was last edited by zhu*qiangsy on 2012-4-1 20:06. The material that comes out continuously from the reactor is methanol containing aromatic organic compounds, with about 10% water present and a temperature of around 65 degrees. The melting point of these aromatic organic compounds is 90 degrees, while their decomposition temperature is above 230 degrees. Now, methanol is to be separated out, while the aromatic organic compounds are to be discharged in liquid form (with water and impurities allowed). I would like to ask the experts if there is any suitable way. The process must be continuous, and as much methanol as possible should be distilled off. The material coming out of the reactor contains a small amount of solids, which are in the form of fine crystals.
Getting a design firm to design a distillation tower or something should work, right?
The difficulty is: the melting point of the aromatic compound being targeted is 90°C, while the boiling point of methanol is 65°C; so how should the temperature in the distillation tower be set? If the temperature is set too low, the target substance will solidify; but if it’s too high, won’t the amount of methanol vaporize be too large?
It seems to be a process-related issue; once the process is determined, it’s not difficult to choose the equipment.
May I ask if the methanol at the material inlet is in gaseous form? If so, there is a solution. Please send the parameters to my email so that I can consult with the experienced designers. FBLZT2008@163.COM
The methanol at the inlet contains water, and it remains in a liquid state at 65°C. I’ll send the materials to your email. Thank you!
I have received the email you sent. I will get back to you tomorrow after consulting with the senior designers. Please wait a moment.
A low-temperature forced-circulation evaporator is used; when the solid content reaches around 20%, continuous centrifugation is carried out to separate the solids, and the mother liquor that remains is almost entirely water and can be reused.
Solids contain a small amount of salt that must be removed; it is easier to remove this salt in the molten state, so the material needs to be discharged in a liquid form.
20% solids and 80% liquid can be discharged; forced circulation does not cause scaling!