Four-effect Falling Film Evaporator

Working Principle

The concentrated liquid is pumped into the top of the heating tube, forming a liquid film that flows downward along the inner wall of the tube. During this process, due to external heating, the liquid film inside the tube begins to boil and partially evaporate. In the lower part of the tube and in the downstream separator, the remaining liquid and steam are separated.

Properly determine the fluid flow rate inside the heat exchange tubes to prevent dry areas at the bottom, while ensuring adequate liquid film thickness, achieving optimal heat exchange efficiency and minimizing energy consumption.

Membrane evaporators can perform both recirculating evaporation and single-pass evaporation promptly.

Application Scope

Single unit processing capacity up to 200T/H

Suitable for thermally sensitive materials

Suited for materials with low concentration, low solid content, and low scaling tendency.

Product Features

High thermal conductivity, small temperature difference, vacuum evaporation.

Ensure the material remains in a suitable boiling state within the heat exchanger tubes, preventing dry wall and scaling due to intense vaporization.

No loss of boiling point due to liquid column, low circulation volume, and minimal energy consumption.