What is the most commonly used evaporator these days?
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A falling-film evaporator? MVR evaporators are being used more and more, right?
The mainstream evaporation process these days is still likely to be multi-effect evaporation. MVR needs to be balanced based on electricity and steam prices, and MVR refers to a steam compressor, not an evaporator
Yes, single-effect and triple-effect ones are more common.
MVR, mechanical vapor recompression, does it convert mechanical energy into thermal energy?
This post was last edited by EdwardLau on 2017-3-31 at 16:17. A compressor is used to increase the pressure of the steam (to around 50 kPa), raising its temperature by about 20°C, so that it can be used as a heat source for evaporation
The increased temperature isn’t that high either; the economic value must be limited, right?
It is related to electricity costs; this technology claims to require no more than 70 kWh to evaporate one ton of water. If the electricity price is below 0.7 yuan per kilowatt hour, its advantages over multi-effect systems become greater
In other words, they are multi-functional competitors.
The MVR evaporation methods are also diverse nowadays, including plate-type evaporation, traditional submerged heat exchangers, vertical tube falling film evaporation, and horizontal tube falling film evaporation. The choice is primarily determined based on the properties of the material being processed, and there are successful applications for each of these methods