Scraper type thin film evaporator is a kind of high-efficiency evaporation and distillation equipment which uses high-speed rotation to distribute liquid into uniform thin film for evaporation or distillation. It can also carry out deodorization, defoaming reaction, heating, cooling and other unit operations. It can be widely used in Chinese and Western pharmaceutical, food, light industry, petroleum, chemical industry, environmental protection and other industries.
Performance and characteristics
The equipment adopts centrifugal sliding groove rotor, which is a new structure evaporator in foreign countries at present. It can also form film when the flow is very small. The deposit in the treatment liquid attached to the inner wall of the evaporation section of the cylinder can be quickly removed by the movable scraper. Compared with the fixed gap scraper evaporator, the evaporation capacity can be increased by 40-69%. It has the following properties and characteristics:
1. The heat transfer coefficient is high, the evaporation capacity is large, the evaporation intensity can reach 200kg / m2 · HR, and the thermal efficiency is high.
2. The heating time of the material is short, about 5 seconds to 10 seconds, and it works under vacuum condition, which is more beneficial to the heat sensitive material, to keep all kinds of ingredients without any decomposition, and to ensure the product quality.
3. It can adapt to a wide range of viscosity changes. High and low viscosity materials can be treated, and the viscosity of materials can be as high as 100000 centipoise (CP).
4. By changing the rotation direction of the scraper groove, the material handling time in the evaporator can be adjusted.
5. The inner wall of the evaporation section cylinder is precisely bored and polished, and the surface is not easy to produce coking and scaling.
6. It is easy to operate and adjust the product index. Under the closed condition, it can carry out continuous production automatically.
7. The equipment covers a small area, has simple structure, convenient maintenance and easy cleaning.