Issues related to the purification of mirabilite decahydrate after cryogenic denitration
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This post was last edited by sunjl1981 on 2013-1-6 at 23:56. How can mirabilite decahydrate (with a sodium sulfate content of 35–40%) produced as a result of cryogenic denitration be converted into anhydrous mirabilite through simple treatment? The main equipment and operational control parameters are # + + .
Actually, your nitrate content is already this high; the treatment methods are as follows: 1. Freezing. That is, the freezing process is used to cause sodium sulfate in the brine to precipitate as sodium sulfate decahydrate at low temperatures; however, sodium sulfate decahydrate must be converted into anhydrous sodium sulfate through heat treatment (which requires energy). Second, the co-production of salt and nitrate is employed, whereby evaporation takes place in evaporators at different temperatures to separate salt and nitrate, and after drying, dry salt and dry nitrate are obtained.
If your company has natural gas or gas, a dryer equipped with it would work just fine.
It’s better to freeze it! That’s how it’s done for most of them!
The key to recycling sodium sulfate decahydrate lies in whether the cost is appropriate. If economic benefits and investment are not taken into account, the solution is relatively simple. After freezing, separation is carried out directly using a centrifuge; the resulting product is sodium sulfate dihydrate. After concentration through evaporation (in two stages), separation is performed again using a centrifuge followed by packaging, and the resulting product is anhydrous sodium sulfate
By low temperature, what range are you referring to?