Falling film evaporator explained

  There are several kinds of evaporators, which have the similar functions and different structures. These evaporators all can separate, concentrate, and extract substances from mixtures with a very high efficiency. But they have different structures and systems, let’s see them together.

  Falling film evaporator is a separation device, which is to use ethanol as washing solvent to extract, concentrate or separate substances. Falling film evaporator consists of two types--vertical falling film and horizontal falling film. These two kinds of falling film evaporator have the totally different structure.

  Vertical falling film evaporator’s structure is vertical, which works from the top to the bottom. Vertical falling film evaporator is used on the recycling of industrial waste heat and also many fields such as energy, sea water desalination, refrigeration and other fields.

  Horizontal falling film evaporator works horizontally, which is opposite to vertical falling film evaporator. Horizontal falling film evaporator is widely used in chemical engineering, oil refining, sea water desalination and other fields.

  Wiped film evaporator is a new type of high-efficiency evaporator that is forced to form a film through a rotating wiper and flows at high speeds. It has high heat transfer efficiency and short residence time (about 10 to 50 seconds). It can perform falling film evaporation under vacuum conditions.

  Thin film evaporator is a type of evaporator, which is characterized in that the liquid of the material flows along the wall of the heating tube to perform heat transfer and evaporation. The advantages are high heat transfer efficiency, fast evaporation speed and short material residence time, so it is particularly suitable for heat sensitivity.

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