Fluidized bed dryer is a commonly used drying equipment, widely used in chemical industry, pharmaceutical, food, metallurgy and other fields. It achieves the purpose of drying by suspending the material in hot air and using the action of heat and air flow to evaporate the moisture in the material. The working principle of the fluidized bed dryer is to send materials into the drying chamber through a conveying device, and then introduce hot air into the drying chamber through a hot air fan. The hot air forms a fluidized bed in the drying chamber, suspending the material in it. Under the action of hot air, the moisture on the surface of the material evaporates and is discharged from the drying chamber together with the moisture in the hot air. At the same time, moisture is discharged through the exhaust system to maintain a dry indoor environment. The origins of fluidized bed dryers can be traced back to 1921, when fluidization technology was invented. Fluidized bed dryer, also called ebullating bed dryer, refers to the process of drying solid particles in a fluidized state. Since the invention of fluidization technology, drying is one of the earliest fields of application. In 1948, the United States established a Dole-Oliver solid fluidization device. The fluidized bed has a diameter of 1.73m, a bed temperature of 74°C, and a processing capacity of 50 tons of dolomite particles per hour, which is used to separate dust. to obtain a coarser product. Fluidized bed drying technology has been developed in my country since 1958 and was first applied in the salt industry.
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