Key Features
※The feed liquid of a falling film evaporator is added at the top and flows down the tube wall in a film-like manner under the force of gravity, evaporating and concentrating during this process to obtain a concentrated liquid at the bottom. Falling film evaporators can evaporate materials with high concentration and high viscosity (e.g., within the range of 0.05~0.45 Ns/m2). ※Due to the film-like flow of the solution in a single-pass evaporator, the heat transfer coefficient is high. ※Short residence time, which is less likely to cause material deterioration, is suitable for processing heat-sensitive materials.
Small liquid hold-up, the falling film evaporator can operate quickly in response to changes in energy supply, vacuum level, feed rate, and concentration. Near constant. As the process fluid flows solely under the influence of gravity rather than driven by a high temperature difference, low-temperature difference evaporation can be employed.
The Falling Film Evaporator is suitable for the evaporation and concentration of foaming materials. As the feed liquid forms a film and evaporates within the heating tube, a vapor-liquid separation is achieved. Meanwhile, at the bottom of the evaporator, most of the feed liquid is removed, leaving only a small portion along with all the secondary steam to enter the separator for enhanced separation. Throughout the process, there is minimal impact on the feed liquid, thereby preventing the formation of foam.