How effective are MVR evaporators for the concentration of ammonium fluoride solutions, and is it possible to achieve continuous operation with continuous product discharge?
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As the title suggests, I’m wondering if there are anyone who has used MVR evaporators to concentrate ammonium fluoride. Everyone is welcome to share their experiences and discuss this topic; I’d like to learn more about the reliability of MVR evaporators.
We have previously used the MVR process to evaporate high-salt solutions; from the perspective of MVR alone, there is certainly no problem. Other factors depend on your medium and the design of the process
As long as the boiling point elevation is not too high, MVR can be used; moreover, what about corrosion? What material was the originally used equipment made of, and how many effect evaporation stages did it have?
As long as the boiling point elevation is not too high, MVR can be used; also, what about corrosivity, such as Q? What material was the originally used equipment made of, and how many effect evaporation stages did it have?
Help, please – do you know anything about the corrosivity of 300 mg/L fluoride ions?
The medium is 22% ammonium fluoride, and single-effect evaporation is planned to be used
Ammonium fluoride undergoes slight pyrolysis when heated, releasing a small amount of HF and NH3. We previously used a two-effect evaporation system based on graphite; it seems that the equipment had issues and didn’t function properly, so we are considering using an MVR system and have come to learn more about it
It will decompose to produce HF and ammonia; therefore, graphite-based equipment must be used. A MVR should be employed, and a gas scrubber must be installed after the separator in order to minimize the HF content in the steam, otherwise the compressor will get corroded. There are currently no HF-resistant materials available for compressors.
MVR is completely unsuitable; the compressors used in this process simply cannot withstand hydrofluoric acid. If one wants to concentrate 22% ammonium fluoride to 40%. Other processes can be considered; for more information, please contact Q1007088056
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