Citric acid vibrating fluid bed dryer machine

The materials enter the machine from the feed port. Under the action of vibration force, the materials are thrown forward in a horizontal direction and move continuously. After the hot air passes upward through the fluidized bed and exchanges heat with the wet materials, the wet air is discharged by the exhaust after being dedusted by the cyclone separator (or pulse bag filter), and the dry materials are discharged from the discharge port, and then collected and packaged.

A vibrating fluidized bed is to increase the vibration of the bed on the basis of material fluidization so that the materials have a process of throwing and loosening. The two are organically combined to achieve the fluidization effect of the low bed. It is different from the traditional Fluidized Bed Dryer in that the material transportation and fluidization of the ordinary fluidized bed dryer are completely completed by wind (hot air), while the Vibrating Fluidized Bed Dryer is mainly completed by vibration force. It can reduce the minimum fluidization speed of materials, especially the particles near the bottom that fluidizes first, improve the fluidization quality of particles at the bottom, and enable some materials that are difficult to fluidize to carry out normal drying operations.

Application of vibrating Fluid Bed Dryer: 

It is widely used in drying, cooling of power or granules state materials, such as citric acid, salt, bread crumbs, milk powder, monosodium glutamate, borax, ammonium sulphur, compound fertilizer, beanm lees, mineresides, and sugar in chemical, pharmaceutical, foodstuff, grain, mine industry and so on.

Design condition of vibrating fluid bed dryer: 

Fluidized bed operation has the advantages of good mixing of solid particles and large surface area of heat and mass transfer between gas and solid, but its main shortcomings are:
1. The treated particles should be greater than 50 ~ 100 μ m. Otherwise, it is easy to form gully flow and stagnation zone;
2. When the particle size distribution is wide, the entrainment is serious
3. When the particle temperature is high, it is easy to form agglomeration or agglomeration;
4. For nonspherical particles such as wheat grain, fiber, and slice, they can not fluidize well.

A vibrating fluidized bed is a successful modified fluidized bed. It is a fluidized bed supported on a group of springs and powered by an exciting motor. The bulk materials put into the dryer are thrown to the outlet end and output to the VI end under the action of exciting force on the perforated plate. The hot air is blown under the perforated plate and passes through the material layer to transfer the heat to the material, and the water vaporized from the material is discharged from the exhaust port to dry the material. Because the materials are in motion under the action of mechanical vibration in the vibrating fluidized bed, dynamic drying can be achieved only by blowing in an appropriate amount of hot air. Therefore, the thermal efficiency is high and the materials are dried evenly.

Parameter of vibrating fluid bed dryer: