The fastest method for desalination
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This post was last edited by sunjl1981 on 2013-1-6 at 22:30. Question: When dissolving raw salt in water, is it faster to use forced stirring for dissolution, or is it faster to use a method where water is introduced from the bottom, flow occurs upward, while the raw salt remains stationary? # hcbbs
Salt dissolution rate? I’m not sure what the original poster meant; increasing the dissolution rate can be achieved through methods such as stirring and heating. I guess the original poster might be looking for a better method for salt treatment? When brine and raw salt are brought into countercurrent contact, the contact time resulting from a certain height ensures that the solution reaches a saturated state. This traditional salt-tingling tank ensures that the saline solution remains saturated, and it also allows insoluble mechanical impurities to settle at the bottom of the tank, preventing them from flowing into subsequent stages. The stirring suggested by the poster can indeed speed up the dissolution process, but it requires higher costs for power and mechanical maintenance. Moreover, insoluble mechanical impurities will also be stirred up and carried forward to subsequent stages, imposing an additional burden on them.
The stirring should be faster, but the salt sludge is also stirred up, resulting in unnecessary increase in energy consumption.
Why such a quick pace? It’s too fast; the concentration might not meet the standards. Isn’t there a need for a holding time? At least half an hour, I guess
None of the methods suggested by the original poster are fast; the fastest approach is to combine multiple methods and carry them out in stages. During high-volume production, speed indeed becomes a critical factor. 1. The salt added may accumulate in certain corners; it can be washed away using treated return brackish water, and uniform mixing can be achieved through compressed air introduced from the bottom ； 2. The overflowed brine passes through a baffle tank before entering another tank where it is stirred again.