Are the shells of film-evaporators lined with enamel?
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Due to the corrosive nature of the material and its presence of a certain amount of chloride ions, ordinary metal materials are not suitable for use. I’m not sure whether an enamel lining can be applied to the shell of a film-evaporation evaporator to be used for concentrating this material
The gap between the cylinder of the film evaporation evaporator and the scraper is very small; this is necessary to enable thin-film evaporation to take place. Therefore, this type of manufacturing requires great precision, and care must also be taken during operation to prevent scraping of the cylinder walls. Even with metal-based film evaporators, when the material being processed is sticky or forms clumps, scraping of the cylinder walls can occur if the evaporator is not properly designed, manufactured, or operated, which can cause significant damage to the scraper or the cylinder. Enameled material is more fragile than porcelain, and it cannot be used for the cylinder body.
Agree with the person above. If elastic segment rings are used, friction against the kettle wall is inevitable.
I have seen glass-lined film-evaporators at a equipment manufacturing company in Wuxi.
We have used titanium film-evaporation evaporators, and the results were good; the original poster might want to give them a consideration. The use of glass-lined materials is not recommended.
Glass-lined evaporators can be used, mainly to reduce costs; the performance is good at first but deteriorates over time. If funding is not a concern, it is better to use titanium for construction.
There are already manufacturers of enamel film evaporators in Wuxi, Jiangsu, which can overcome the problem of chloride ions