What is the reason for the continuous decrease in pressure in an MVR falling-film evaporator?
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In an MVR falling-film evaporator operating according to a process similar to the one below, why does the pressure in the separator adjacent to it keep dropping? I would like to ask experts what the reasons are
This post was last edited by huohuli on 2018-4-8 11:17. I’m not very familiar with MVR; what is your control method? I guess it’s because the area of the heat exchanger is large; increasing the liquid level in the evaporator would help.
In principle, the pressure in the separator keeps decreasing, and the cause of this is nothing other than the MVR compressor. Does your system rely solely on MVR compressors? Is there a vacuum pump?
It is mainly related to the liquid phase temperature inside the separator and the amount of gas evacuation from the system. If the temperature rises while the amount of evacuation remains unchanged, a decrease in pressure is normal； If the temperature of the liquid phase remains constant or decreases, then the vacuum level should increase