Drum scraper dryer is a drying equipment widely used in many industries such as chemical, food, and medicine. The following is a detailed introduction to it:

Working Principle

The working principle of Dingli drum scraper dryer is to allow liquid or slurry materials to form a thin film on the drum surface heated by water vapor or other heat carriers, and the materials are dried during one rotation of the drum. The heat is transported to the inner wall of the drum through the pipeline, transferred to the outer wall of the drum, and then transferred to the material film, so that the moisture in the material film is evaporated and dehumidified, and the material containing moisture is dried. The dried material is scraped off the drum by the scraper installed on the surface of the drum, and then to the screw conveyor placed under the scraper. The dry material is then concentrated and packaged by the screw conveyor.

Performance characteristics

1. High drying rate: Because the material film is very thin and the heat and mass transfer directions are consistent, the surface of the material film can maintain a high vaporization intensity.

2. High operational flexibility: Wide adaptability, can meet the requirements of a variety of materials and different outputs.

3. High thermal efficiency: Its general thermal efficiency is high, about 80%~90%.

4. Short drying time: The drying cycle of the material is short, suitable for heat-sensitive materials.

5. Compact structure: Small footprint, easy to install and maintain.

Application range

The drum scraper dryer is suitable for drying liquid or viscous materials in the chemical, dye, pharmaceutical, food, metallurgy, yeast and other industries. For example, in the food industry, it can be used to dry rice flour, oatmeal, α starch, potato flour, jam, starch paste, etc.; in the chemical industry, it can be used to dry some paste-like chemical raw materials.