Regarding the issue of single-evaporation concentration, guys.
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I saw someone say that in a single-effect sodium chloride concentration system, the steam inlet valve should be closed; yet the temperature of the evaporator doesn’t drop over several days and remains at 100 degrees. What’s causing this? It is this that leads to continuous evaporation of water inside the evaporator, resulting in ongoing concentration of the material. Have you encountered a situation where the temperature of such an evaporator doesn’t drop even when the steam supply is turned off? How can this be resolved?
Closing the hydrophobic valve before and after it yields better results than closing the steam valve.