How can the mother liquor after MVR treatment be better reintroduced into the evaporation system?
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After MVR concentration and crystallization, the mixture is separated using a centrifuge. The mother liquor resulting from this process is a saturated salt solution; it is usually allowed to flow back into the initial feed tank, thereby returning to the system. However, since this mother liquor is at high temperature and has a high solubility, upon coming into contact with the feed wastewater at normal temperature in the feed tank, a large amount of salt crystals are formed there. Later, a heating strip was added to the raw material tank to maintain the temperature; as a result, less salt was produced. However, even with the condensate water generated by the MVR being used to feed the heating strips, the heat generated was not sufficient to keep the temperature in the raw material tank high enough, and salt continued to be formed inside the tank, which caused blockages in the pipelines. How can this problem be solved? I need the advice of experts.
Is there no expert to give guidance? . . . .
There’s no rush; once the question is posted, it might wait until someone sees it.
You cannot first crystallize or separate out part of the salt, rod. And then pour the low-concentration salt solution into the raw material tank?
Why not send it back directly to the evaporator system to continue the crystallization in the evaporator?
What is your process? Is it possible to feed the mother liquor into a pre-concentration evaporator?
Our MVR units send the material back directly to the system for further evaporation and crystallization
Find a design manufacturer – if this can’t be solved, then what’s the point of having crystal production equipment?
It was sent straight back to the evaporator, and the problem was resolved
The final concentrated solution is what results when nothing else can be done with it; if it is fed back in, the end outcome might be evaporation, crystallization, and aggregation, ultimately leading to the collapse of the system
A shell-and-tube heat exchange crystallization unit is installed in front of the mother liquor feed tank; the centrifugated mother liquor flows through the shell side, and after salt crystallization occurs, it is fed into the feed tank.