Fluidized bed dryer ^ simple single-layer cylinder type, has been used for ammonium sulfate, ammonium chloride, anhydrous sodium sulfite, table salt, polytetrafluoroethylene, calcium gluconate, alkaline qinglin dye, catalyst particles and other materials drying. This kind of dryer is easy to operate, but the disadvantage is that the residence time of the material in the fluidized bed is widely distributed, and the humidity of the product after drying is not uniform.
The multi-layer fluidized bed dryer overcomes the disadvantage of single-layer fluidized bed dryer, the residence time distribution is greatly narrowed, the drying degree of products is even, easy to control the drying quality of products. As the residence time is reduced and the thermal efficiency is high, it is suitable for the material with longer slow-down drying stage and the material with higher moisture content. It has been used for drying polyester chips, sodium salicylate, amino aspirin, oxytetracycline, aureomycin, tetracycline, tablet starch granulation, sugar powder and other materials.
The drying time of horizontal multi - chamber fluidized bed dryer can be adjusted arbitrarily, and the product with uniform drying can be obtained. It is suitable for drying all kinds of hard drying powder materials and heat sensitive materials. Such as polyvinyl chloride resin, polypropylene resin, nylon 1010, o-chlorobenzoic acid, oxytetracycline, chloramphenicol, tetracycline, sugar powder and other materials drying.
The stirred fluidized bed dryer is equipped with agitator in the fluidized bed, which can also be used to dry some wet granulated materials or materials that are easy to agglomerate. It can be used for drying ammonium sulfate, copper sulfate, sodium fluoride, amino acid, anhydride casein, polypropylene resin, phenolic resin and other materials.
Vibration fluidized bed dryer is a very successful modified fluidized bed, which adds mechanical vibration to the fluidized bed. Compared with conventional fluidized bed, it can reduce the air volume and pressure required for fluidization. Mainly used in mining, metallurgy, chemical industry, pharmaceutical industry, food industry, such as sugar, asbestos mine, milk powder and other materials drying.
There is a belt fluidized bed dryer, is equipped with a belt conveyor on the bed surface of the fluidized bed, moving forward with the material. When hot air is blown into the bed surface, the material is fluidized or aerated, making the surface water evaporate. It has been widely used in the drying of compound fertilizer, calcium carbonate, clay, kaolin, clay, grain, distiller's grains, activated sludge and other materials.
According to the needs of production, the fluidized bed drying equipment is being improved continuously, and its application scope in industry is getting larger and larger.