Industrial development history of vibrating fluidised bed dryer

Fluidisation technology originated in 1921, and the earliest application in drying industrialised mass production is the Dole-Oliver solid fluidisation unit established in the United States in 1948. And our country until 1958 began to develop this technology. Fluidised bed dryer is divided into single-layer type, multi-layer type, multi-chamber type according to the structure form. Vertical and horizontal. According to the additional device is divided into with vibrator and indirect heating. According to the operation mode is divided into continuous and batch type. These are two commonly used classifications of fluidised bed dryer.



With the development of multi-pole drying, vibration fluidised bed is applied, and its basic structure is similar to that of ordinary fluidised bed, which is a kind of improved product with mechanical vibration added to the fluidised bed. The material relies on mechanical vibration and perforated airflow dual role of fluidisation, and under the action of vibration forward for the piston form of movement, the use of convection, conduction, radiation to the material layer to supply heat, you can achieve the purpose of drying.



Vibrating fluidised bed due to material transport is completed by vibration, the supply of hot air is only used for heat and mass transfer, so it can significantly reduce energy consumption. In addition, due to the strong vibration of the bed, the resistance of heat and mass transfer is reduced, improving the drying rate of the vibrating fluidised bed, and at the same time, it is not easy to produce a large number of entrainment or fluidisation of fast mass or highly dispersed materials can be dried smoothly, overcoming the ordinary fluidised bed is prone to return to mix, ditch flow, sticky wall and other phenomena. In addition to good drying function, this equipment can also be attached according to the needs of the process of material granulation, cooling, screening and conveying process. At present, it has been widely used in chemical, pharmaceutical, food, food, salt, and mining and metallurgy industry sectors. This technology is basically mature, and has formed a series.