Under what operating conditions can an MVR evaporator be used? A more detailed explanation is needed
Thread Content
I want to know what materials are suitable for MVR evaporators. For example, materials that tend to foam – if they are suitable, then what exactly are these materials that tend to foam? Substances with a small increase in boiling point. What does it mean that the increase isn’t significant? Exactly how much is considered not much?
Why is it suitable when the increase in boiling point is not significant?
I know there is brine:) for salt production
If you want to know what materials are suitable for MVR evaporators, consider the question from another perspective: What factors affect MVR evaporators? Just to get things started: 1. Regarding the main equipment involved in MVR evaporators: Compressors – Factors affecting efficiency: other volatile components besides water vapor, as well as the corrosive effect of these other components on the compressor ； Liquid is present at the compressor inlet; liquid can easily be carried along in the steam of the foaming material ； The flow rate range of the compressor itself, as well as its saturation temperature rise range. Heat exchanger----heat transfer coefficient, water scale formation. The impact of medium corrosivity on equipment. Boiling point elevation -- The boiling point of a solution is higher than that of the pure solvent; this phenomenon is known as boiling point elevation of the solution. The degree of increase in boiling point is influenced by factors such as the type of salt, whether salts are mixed together, and the presence of other non-volatile components. 2. Considering investment and operating costs, it needs to remain within an acceptable range, etc. 3. Advantages and disadvantages compared to other technologies.
A specific technical and economic analysis is required to determine this. For example, for sodium chloride, the boiling point of its saturated solution increases by about 8 degrees; the heat transfer temperature difference should also be around 8 degrees. Therefore, the saturated temperature rise required of the compressor is 16 degrees, which results in a higher compression power. In contrast, the boiling point increase for sodium sulfate is just over 3 degrees, showing a significant difference.