On the drying of wet powdered materials

For the drying of moist powdery materials, spray dryers and fluidized bed dryers are commonly used. The processing methods of these two types of dryers can both solve the drying problem of powdered materials, while preventing blockages during material transfer. 1. Spray dryer: It disperses moist materials into hot air through high-pressure spraying or atomization, allowing the materials to dry rapidly in a short time. This method ensures that the particle distribution of the material remains uniform during the drying process, and it prevents any clogging of the material. 2. Fluidized bed dryer: A fluidized bed dryer dries materials by placing wet powdered substances in a fluidized bed and introducing heated air at a constant temperature from the bottom, creating an air flow that passes between the material particles and keeps them in a state of fluid motion, thereby achieving drying. This method allows the humidity between particles to be quickly balanced during the drying process, resulting in high drying efficiency and preventing the material from clogging. To address the issue of blockages in material transportation, it is recommended to clean the conveying equipment regularly, or to use specially designed conveying devices such as screw conveyors or pneumatic conveyors. Additionally, pre-treatment of the materials, such as granulation, can also be considered to ensure smoother transportation and drying processes. .

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