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Classification of multi-effect evaporators
Feb 15, 2021

1. According to the evaporation method: natural evaporation: that is, the solution evaporates at a temperature lower than the boiling point, such as sea water drying salt. In this case, because the solvent only vaporizes on the surface of the solution, the solvent vaporization rate is low. 2. According to the heating method: direct heat source heating is to mix fuel and air. 3. According to operating pressure: can be divided into normal pressure, pressurized and reduced pressure evaporation operations. Obviously, for heat-sensitive materials, such as antibiotic solutions, fruit juices, etc., should be carried out under reduced pressure. High-viscosity materials should be heated by pressurized high-temperature heat sources (such as heat transfer oil, molten salt, etc.) for evaporation. 4. According to the number of effects: can be divided into single-effect and multi-effect evaporation. If the secondary steam produced by evaporation is directly condensed and no longer used, it is called single-effect evaporation. If the secondary steam is used as the next-effect heating steam and multiple evaporators are connected in series, this evaporation process is multi-effect evaporation.

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