Advantages
Falling film (FF) evaporators are a staple in the industry, known for their low energy consumption and short residence times. Dedert Falling Film Evaporators can concentrate to higher viscosities and suspended solids by using the Full Cone Spray Nozzle Distribution System, which not only reduces the tube blockages, yet also maintains the shear produced by the pump as it passes through the nozzle. Note that the nozzles can be polished for sanitary applications.
For applications with higher viscosities and suspended solids that foul or scale:
- Perforated distribution baskets suffer blockages leading to downtime due to more frequent mechanical cleaning of the tubes. When a plate hole blocks, the tubes below the plate also block
- The increased shear, or turbulence, reduces the viscosity on the evaporation tube walls
- Reduced manufacturing costs, since large heat exchangers (tubes up to 18m long with a 3.5m diameter and 10,000m² of surface area) can be manufactured economically
- Smaller pump and motor requirements for reduced power consumption and operating costs
- Low operating volume reducing residence time and producing better product quality, especially for heat-sensitive products
- Reduced CIP product volumes
- Constant liquid temperature throughout the unit for a lower ∆T requirement
- Improved steam economy in steam heated or TVR systems
- Reduced fan power consumption in MVR systems
