Hyvap - Horizontal Thin Film Evaporator

For the thermal separation of a mixture a thin film is produced at the heated wall of a cylindrical or conical evaporator. A distribution ring on the rotor distributes the liquid evenly across the periphery. Then, the blades fitted at the rotor spread the liquid as a thin film of min. 0.5 mm over the heat transfer surface. The model concept for the flow in the thin film evaporator assumes that prior to each rotor blade a bow wave is formed. In the gap between the rotor blade and the heating surface, fluid is supplied from the bow wave of a highly turbulent area with intense heat and mass transport. This results in a good heat transfer performance even with viscous products. In addition, the formation of deposits is avoided and the intensive mixing also protects temperature-sensitive products from overheating.

Systems & Modules SMS designs, manufactures and supplies complete systems & modules for evaporation, drying and membrane applications. Our scope of supply includes: Consulting / Feasibility Studies Pilot Test Process Design Plant Engineering Project Management Procurement / Manufacturing / Delivery Erection / Installation Start-Up / Commissioning After-Sales Service Skid-Mounted Modules For more than 40 years SMS has been supplying skid-mounted units for the benifit of our customers. The skids are fully assembled, including piping, wiring and testing in the SMS Workshop or in our partners´ workshop. The modular design significantly reduces the required amount of work for assembly and start-up which minimizes the downtime of the existing plant equipment and - as a result - just minor effects occur on the current production.

The falling film principle requires an even distribution of the feed liquid. To achieve this distrubution one or more distribution trays are located in the top head of the evaporator over the complete tube sheet. Our proven distribution system makes sure that the inner surface of each individual tube is properly wetted. The liquid film moves down the tubes by gravity force. Heat applied through the tube wall effects boiling-off the light fraction from the film. The picture shows a co-current operating evaporator with vapour and liquid leaving the bottom of the evaporator into the separator vessel.