• Fluid Bed Dryer Vs Spray Dryer Manufacturers, Fluid Bed Dryer Vs Spray Dryer Factory, Supply Fluid Bed Dryer Vs Spray Dryer
Fluid Bed Dryer Vs Spray Dryer

Fluidized bed dryer is second only to spray dryer.It is divided into a fluidized bed dryer with stirrer and a fluidized bed dryer with internal heat transfer.When a fluidized bed is used to dry the powder and granule materials which are easy to be consolidated or agglomerated, the fluidization difficulty will occur in the feeding section with relatively large moisture content.

At this time, the agitator is set in the feeding section to eliminate the agglomeration problem, and the normal fluidization can be achieved.The latter is a combination of conduction heat transfer and convection heat transfer. When the amount of hot air used in the normal fluidized state is far from enough to meet the heat required for drying, an internal heat exchanger is used to supply part or most of the heat. This operation mode can significantly save energy.Internal heat exchangers come in many forms.Fluidized beds are also often used in combination with second - and third-stage dryers.

The vibrated fluidized bed is called vibrated fluidized bed when vibration is applied on ordinary fluidized bed.Vibration fluidization can be divided into two types from the source of vibration: one type is vibration motor drive;The other is the ordinary motor through the vibration box to make the spring vibration.When the vibratory fluidized bed size is large, the latter effect is better.

The process of fluidized bed spray dryer is an organic combination of fluidization technology, atomization technology and drying technology.It sprays the atomized feed liquid onto the fluidized seed bed to make the seed grow and dry continuously.The equipment is small in size and can produce large particles.The industrial applications of the equipment have been increasing.


Spray dryer spray drying is one of the most advanced drying equipment.There are three conventional atomization methods: rotary atomization, pressure atomization and airflow atomization.

Rotary atomization spray drying is characterized by large single production capacity (spray volume can reach 200t/h), easy control of feed volume, flexible operation and wide application. The characteristics of pressure atomizer and spray dryer are that coarse particles can be produced and maintenance is convenient.As the nozzle hole is small, easy to plug, so the liquid must be strictly filtered.Nozzle hole easy wear, wear - resistant materials must be made.Pressure nozzle also has a new structure, called pressure - air flow nozzle.It is characterized by a pressure nozzle in the center and an air flow nozzle in the surrounding environmental gap.Atomization is divided into two stages: the pressure nozzle first forms a liquid film, which is atomized by the airflow for the second time, making the droplets finer.Advantages of this type of nozzle :(1) adjust the pressure of compressed air, then can adjust the diameter of droplets, simple operation;(2) the feed liquid with large yield and high viscosity can also be atomized into fine droplets;If the compressed air is stopped, the original pressure nozzle can also be used.

Air flow atomizer is mainly used in laboratory and intermediate factory.The first two kinds of atomizers can not atomize the feed liquid, the adoption of air flow atomizer may atomize.High viscosity paste, paste and filter cake materials can be atomized by three fluid nozzles.

Air dryer air drying technology is mature, if there are operational data, you can directly design.At present, there are many drying equipment manufacturers can provide this type of equipment.

1.Product moisture content is too high
Exhaust air temperature is the main factor affecting the moisture content of finished products, so the reason for the high moisture content of products is generally the exhaust air temperature is too low. And the exhaust air temperature can be adjusted by the amount of feed. Therefore, the corresponding measures are appropriate to reduce the amount of feed, in order to improve the exhaust temperat...more
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