In the production of heavy soda ash via liquid-phase hydration, how should the filtrate with excessive salt content be treated to reduce its salt concentration?
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How should excessive amounts of high-salinity filtrate be disposed of? The volume of soda ash process mother liquor keeps increasing. Is there any good method for dealing with it? Let’s all communicate more! Thank you
We’re delivering baking soda, which serves as a raw material for producing baking soda, because currently there are no standards regarding the salt content in regular baking soda. In some alkali plants, brine is sent to the brine treatment section, where it is diluted to produce refined caustic soda solution.
The filtrate with a high content of hydrated salts in the liquid phase is a saturated solution of sodium carbonate monohydrate. Is it feasible to use this filtrate as wash water in filtration?
Reply to 3# Qingtan Xiaolong: It’s acceptable to send it to a filter for washing, but since the carbonization solution keeps accumulating, there’s really no point in sending it over. Moreover, it would also mess up certain indicators. Therefore, I’d like to dispose of it. I wonder which units might need such filtered liquid?
This is intended for vacuum salt production; it might yield good results. Currently, the process has been designed this way, but it hasn’t been put into operation yet.
Reply to #4 by ouyygang: May I ask what are the total alkalinity and salt content in your filtrate? Is it possible to provide a benchmark?/
Reply to 6# hziee16206: They are all supersaturated sodium carbonate solutions, with a soda content of generally over 30%. It’s because the sodium chloride content is somewhat high—around 3%—that a portion of it needs to be removed through treatment.
Reply to 7# ouyygang: How much volume is there per day? Maybe we can cooperate!
Add me on QQ: 332312031, let’s discuss the details
Reply to 8# hziee16206: The daily output is around 50 cubic meters; sometimes it’s a bit more. Add me on QQ at 332312031 for further discussion, or email me at 10490322@163.com
For 50 cubic meters per day of brine with high salt content, there should be at least 3 sets of liquid-phase hydration units