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Difference between revisions of "Vibrating Fluid Bed Dryers"
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==Physical Properties== | |||
These materials are often characterized by having one or more of the following physical properties: | These materials are often characterized by having one or more of the following physical properties: | ||
* Wide particle size distribution | * Wide particle size distribution | ||
* Low strength of wet or dry particles | * Low strength of wet or dry particles | ||
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In the vibrated fluid bed dryer, the material is easily transported through the dryer by the combined effect of fluidization and vibration. The fluidization velocity can be judiciously selected, to minimize entertainment of the smaller particles, to avoid gas bubbling m the fluid bed thereby minimizing attrition. The residence time can be adjusted, by varying the bed height, through the overflow weir position. A cooling section can also be provided, by partitioning of the plenum chamber.<br /> | In the vibrated fluid bed dryer, the material is easily transported through the dryer by the combined effect of fluidization and vibration. The fluidization velocity can be judiciously selected, to minimize entertainment of the smaller particles, to avoid gas bubbling m the fluid bed thereby minimizing attrition. The residence time can be adjusted, by varying the bed height, through the overflow weir position. A cooling section can also be provided, by partitioning of the plenum chamber.<br /> | ||
'''Typical products handled:''' | '''Typical products handled:''' | ||
* Salt | * Salt | ||
* Milk products (used as a secondary dyer) | * Milk products (used as a secondary dyer) | ||
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==Operations== | |||
* Material is easily transported through the dryer due to fluidization and vibration | * Material is easily transported through the dryer due to fluidization and vibration | ||
* Fluidization velocity can be judiciously selected to minimize entertainment of the smaller :particles | * Fluidization velocity can be judiciously selected to minimize entertainment of the smaller :particles | ||
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==Advantages== | |||
* Well suited for constant | * Well suited for constant | ||
* Well suited for failing rate drying | * Well suited for failing rate drying | ||
* By preheating the air, the residual moisture can be reduced | * By preheating the air, the residual moisture can be reduced | ||
* Can fluidized well the solids having a well defined particle size | * Can fluidized well the solids having a well defined particle size | ||