Advantages of vacuum paddle dryer
What are the specific advantages of vacuum paddle dryers? The rake vacuum dryer is mainly composed of a shell, a rotating shaft and rake teeth. Unlike paddle dryers, the rotating shaft and rake teeth of vacuum paddle dryers are not used as heating surfaces; they merely serve to stir the material and update the surface. Vacuum paddle drying features a simple structure, convenient operation, long service life, stable and reliable performance, low steam consumption, strong applicability, and good product quality. It is particularly suitable for drying paste-like materials that are not heat-resistant, flammable, and prone to oxidation at adjusted temperatures. This machine has been proven by long-term use by users to be an outstanding drying equipment. The commonly used drying medium for vacuum paddle dryers is usually steam, heat transfer oil or hot water with a pressure of 0.1 to 0.3Mpa. The vacuum degree inside the dryer is 50 to 90kPa, the filling rate of the material is 30% to 80%, and the thermal efficiency is 70% to 80%. The rotational speed of the shaft is 6 to 30rpm with stepless speed regulation.
Under the continuous tumbling of the rake teeth, the surface of the material in the paddle vacuum dryer is constantly renewed when it comes into contact with the shell wall. The material to be dried is directly heated by steam. It is a novel horizontal intermittent vacuum drying equipment. The wet material is evaporated through conduction. The scraper mixer continuously removes the material on the hot surface and pushes it in the container to form a circulating flow. After the water evaporates, it is extracted by the vacuum pump. This machine adopts a heating method that combines interlayer and internal mixing, featuring a large heat transfer surface and high thermal efficiency. This machine is equipped with a mixing function, which enables the materials to form a continuous circulation state, further enhancing the uniformity of material heating. This machine is set for mixing and can smoothly dry slurry, paste and pasty materials. This machine adopts mechanical seals, which can well control the vacuum degree of the equipment. The method of heating the interlayer and the inner mixing together is adopted, which has a large heat transfer surface and high thermal efficiency. This enables the materials to form a continuous circulation state within the cylinder, further enhancing the uniformity of material heating. Then, the drying of slurry, paste and paste-like materials can be carried out smoothly.
