Fluidized bed drying is an efficient drying technology that is widely used in a variety of industries. The principle is that the granular materials are stacked on the distribution plate in the equipment, and when the air flow enters the bed from the lower part of the equipment, with the increase of the air velocity, the solid particles will appear in a boiling state in the bed, forming a fluidized bed.
Fluidized bed drying has many advantages. First of all, it has a high-efficiency drying effect, which can make the material reach a dry state in a short time. Secondly, fluidized bed drying has a higher yield, which is suitable for large-scale continuous production. In addition, it has also been widely used due to the low drying temperature, easy operation and small footprint of fluidized bed drying.
In fluidized bed drying, hot air plays a dual role as both a fluidizing medium and a drying medium. The dried material is tumbled, mixed, friction and collided in the hot air flow, and heat and mass transfer are carried out at the same time, so as to achieve the purpose of drying. This drying method can effectively remove the moisture in the material and improve its dryness.
In boiling drying, a stream of hot air blown in from the bottom of the fluidized bed is used to suspend and tumble the particles to form a "boiling shape". This dynamic beating greatly increases the evaporation surface of the material, and the hot air flow passes through the suspended particles for heat exchange, taking away the moisture, and achieving the purpose of drying. If vacuum boiling drying is used, the drying efficiency can be further improved.
In conclusion, fluidized bed drying and boiling drying are both efficient and practical drying technologies that are widely used in various industries. They can effectively remove water from the material, improve its dryness, and have the advantages of high efficiency, high output, and low energy consumption.