Vibrating fluid bed nanoparticle processing

  • 2 min read

Description:

The fluidization of fine particles has been applied to several operations, such as coating, separation, drying, granulation, crystallization, heat transfer and several chemical reactions. Recently, more and more attention has been paid to the fluidization of nanoparticles, which are usually defined as primary particles with a size of less than 100 nanometers. It is known that nanoparticles provide the possibility of generating new materials by controlling properties such as nano-scale morphology, spatial arrangement, size, surface chemistry and composition. Therefore, processing nanoparticles in a vibrating fluid bed dryer is an important operation.

screw conveyor
Vibrating Fluid Bed

  

Due to strong cohesion, the fluidization of ultrafine particles is characterized by aggregation. The nature of the agglomerate, rather than the nature of the primary particles, usually determines the fluidization behavior of the ultrafine particles. Various combinations of inter-particle forces such as electrostatic interaction and liquid bridging may occur in a vibrating fluid bed dryer.

screw conveyor
Vibrating Fluid Bed

  

These forces can form a structure with such a high strength that it is impossible to fluidize, which is the typical behavior of C particles in the classification. Different systems that provide external agitation to the bed, such as sound and mechanical vibration, have been applied in order to improve the fluidization quality of ultrafine particles.

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Vibrating Fluid Bed Dryer

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