Air Supply system for fluid bed dryer: A continuous fluid-bed dryer/cooler is a machine in which a continuous flow of air is conveyed over a perforated bed. The product is dried in the first section of the machine and cooled down in the second part. Drying occurs because of the direct contact between the “wet” material and the hot air blown through the material. There are many ways to heat the supply air; The air can be heated by a direct or indirect gas burner, a steam heat exchanger, hot water heat exchanger , electrical heater or using waste heat/heat recovery. Sometimes it is necessary to dehumidify the air before the air enters the drying and/or cooling section of the fluid bed system. The DEHUMIDIFICATION of the supply air can be done by using dehumidifier by condensing heat exchanger or by using a desiccant air dryer (Silica gel or LiCl).
