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Brine Evaporator – Classification and Main Components of Evaporators
Release time:
2022/05/30
The evaporator consists primarily of two main sections: the heating chamber and the evaporation chamber. The heating chamber supplies the liquid with the heat required for evaporation, causing the liquid to boil and vaporize. The evaporation chamber ensures complete separation of the gas and liquid phases. The steam generated in the heating chamber carries a large amount of liquid droplets; once it enters the larger space of the evaporation chamber, these liquid droplets are separated from the steam either through their own natural condensation or by means of demisters. In shell-and-tube condensers, demisters are typically located at the top of the evaporation chamber.
The evaporator consists primarily of two main sections: the heating chamber and the evaporation chamber. The heating chamber supplies the liquid with the heat required for evaporation, causing the liquid to boil and vaporize. The evaporation chamber ensures complete separation of the gas and liquid phases. The steam generated in the heating chamber carries a large amount of liquid droplets; once it enters the larger space of the evaporation chamber, these liquid droplets are separated from the steam either through their own natural condensation or by means of demisters. In shell-and-tube condensers, demisters are typically located at the top of the evaporation chamber.
Evaporators are broadly classified into two major types: circulating and film-type. According to the flow pattern of the solution within the evaporator, they can be further divided into circulating types and single-pass types. In circulating evaporators, the boiling solution passes repeatedly over the heating surface in the heating chamber; examples include the central circulation tube type, suspended basket type, external heating type, Levitt type, and forced circulation type. In single-pass evaporators, the boiling solution flows once through the heating surface without recirculation—instead, the concentrated liquid is immediately discharged. Examples of single-pass evaporators include the rising-film type, falling-film type, stirred-film type, and centrifugal-film type.
Direct-contact type: In this type, the heating medium directly contacts the solution for heat transfer, such as in immersion-fired evaporators. During operation, evaporation units consume large amounts of heating steam. To conserve heating steam, evaporation units can be combined with vapor-compression evaporators.
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