Flash evaporation dryer has a reasonable design, compact structure, and wide range of applications. It can be used in various chemical and light industries such as pigments, dyes, fine chemicals, pesticides, fertilizers, feed, food, medicine, electronics, etc., to dry paste materials with high moisture content.
Flash drying machine has the following characteristics:
1. The bottom of the drying chamber is equipped with an inner cone structure, which continuously increases the cross-sectional area of the dryer gas flow from bottom to top. The lower part has a relatively high gas velocity, while the upper part has a relatively low gas velocity, ensuring that the large particles in the lower part are in a fluidized state while the small particles in the upper part are also in a fluidized state. The inner cone structure also shortens the length of the cantilever part of the stirring shaft, thereby increasing the reliability of operation. In addition, this structure can effectively prevent the bearings from working in harsh conditions in high temperature zones, thereby extending the service life of the bearings.
2. Install a scraper on the mixing teeth. While the material is being rotated and crushed by the stirring teeth, it is also thrown towards the wall and stuck to the surface. If the material stuck to the wall is not scraped off in time, serious "scarring" phenomenon will occur, leading to abnormal operation. Installing a scraper on the stirring teeth can ensure that the material is peeled off before it is firmly bonded to the wall.
3. A grading ring is installed at the top of the drying room. Its main function is to separate and block materials with larger particles that have not yet dried, and continue drying to ensure that the product meets the requirements of narrow particle size distribution and uniform moisture content.
4. Install a cooling jacket at the hot air inlet of the cone bottom. At the point where the hot air comes into contact with the material, the temperature is very high, usually close to the temperature of hot air, far higher than the temperature in the bed. During operation, it is inevitable that a small amount of material will bond near the annular gap, stay for too long, and cause material deterioration or even melting. To avoid this phenomenon, a local jacket can be added to reduce the temperature of the wall at this location, allowing the operation to proceed smoothly.