Four major process design methods for rotary flash drying machine

The new equipment of rotary flash dryer adopts multiple devices, such as multiple feeding devices, to ensure continuous and stable feeding, and the feeding process will not produce bridging phenomenon; The bottom of the dryer adopts a special cooling device to avoid material sticking and deterioration in the high-temperature zone at the bottom; By using special pneumatic sealing devices and bearing cooling devices, the service life of the transmission part is effectively extended; By using a special air distribution device, the equipment resistance is reduced and the processing air volume of the dryer is effectively provided; The drying chamber is equipped with grading rings and swirl blades, which can adjust the material fineness and final moisture content; Using a stirring and crushing device to generate strong shearing, blowing, and rotating effects on the material; Air filters, cyclone separators, bag filters, etc. are used to effectively remove dust and avoid environmental and material pollution. This equipment has strong mass and heat transfer, high production intensity, short drying time, and short material retention time. So today, experienced drying equipment manufacturers in Changzhou will introduce to you the four major process design methods of rotary flash dryers!

1、 Determination of drying room
The evaporation intensity of some materials processed by the rotary flash dryer and the volumetric heating method are theoretical design methods for the rotary flash dryer. However, the key volumetric heating coefficient in this method is difficult to determine, so it lacks operability. The evaporation intensity method is an indirect method of volumetric heating method, which can be calculated as long as there is certain experimental data. It is a commonly used method in industrial design. The evaporation intensity method calculates the volume of the drying chamber based on the amount and intensity of evaporation, and then calculates the effective height based on the relationship between diameter and height.

2、 Drying chamber diameter
Another method is to calculate the required air consumption through material balance and heat balance, and then determine the diameter of the dryer based on the range of air velocity.

3、 Height and graded particle size of dryer
The hot air from the hot air distributor enters the drying chamber through a circular gap in a tangential direction. The material in the drying chamber rotates and rises in a spiral motion under the action of the hot air blowing and the push of the agitator. When studying the fluid motion of smaller particles under centrifugal force fields, the influence of gravity is minimal and can therefore be ignored.

4、 Application of Rotary Flash Drying Machine
The operating conditions of the partial rotary flash dryer include a grading ring at the upper part of the drying chamber, which is mainly used to separate materials with larger or undried particles from qualified products. Blocking them in the drying chamber can effectively ensure the required particle size and moisture content of the products. Replacing grading rings with different diameters can meet the particle size requirements of the product. Cold air protection is installed at the location of the cone bottom hot air population to prevent materials from overheating and deteriorating due to contact with high-temperature air. The drying system is enclosed and operates under slight negative pressure, preventing dust leakage and protecting the production environment, ensuring safety and hygiene.