What is the appropriate brine purification process for mineral salts?
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The raw material is mineral salt; so, for the purification of brine, should a ceramic membrane or an organic membrane process be used? Please ask the experts to analyze it! Thank you!
Some people say that the fine sand particles in mineral salts can scratch the ceramic membrane layer. Also, I saw a post in the group yesterday; some people said that the ceramic membrane process involves a high filtration load. Please also provide an explanation! Thank you!
I would also appreciate it if the experts could provide a detailed explanation based on both practical applications and theory. Thank you!
It’s better to use mineral salts or organic membrane processes; inorganic membranes not only cause scratches on the coating but also require high energy consumption, especially in the case of filter presses. Nowadays, organic membranes have also become mature without the need for any pre-treatment process
Organic membranes are recommended; ceramic membranes have too many drawbacks. From my current experience with them, they are extremely problematic – in the event of a leak, it causes a lot of trouble, and such leaks cannot be monitored! ! !
We currently use organic membranes for 300,000 tons of caustic soda, and we are preparing to install ceramic membranes for 150,000 tons as a backup in case of failures in the pre-treatment system. I’m not sure what the disadvantages of the ceramic membrane you mentioned are; could we discuss this?
First, the ceramic membrane consumes a lot of electricity; second, leaks cannot be monitored; third, the initial investment is high. Although it is theoretically possible to use it for a long time, it broke down twice in two years, which is very troublesome. Fourth, the organic membrane process is mature and can also be applied to processes that do not use pre-treatment units. In summary.
It is recommended to use organic membranes; the organic membranes used by our company operate stably