Rotary flash dryer four major process design methods

The special air separation device reduces the resistance of the equipment and effectively provides the dryer's handling air volume; the drying chamber is equipped with grading ring and cyclone sheet, which can adjust the fineness and final moisture of the material; it adopts stirring and crushing device, which produces strong shear, blowing floating and rotating effects on the material; it adopts air filters, cyclone separator and bag dust collector, which can effectively remove the dust and avoid the pollution of the environment and the material. The equipment has strong mass and heat transfer, high production intensity, short drying time and short material residence time. So today by the experienced Changzhou Haihan drying equipment manufacturers to introduce you to the rotary flash dryer of the four major process design methods!

 

First, the determination of the drying chamber

  Rotary flash dryer processing part of the evaporation intensity of the material, the volume to the heat method is the theoretical design of the rotary flash dryer but the key volume of this method to the heat coefficient is difficult to determine, so the lack of operability. Evaporation intensity method is an indirect method of volume heat method, as long as there is a certain experimental data can be calculated, is often used in industrial design methods. Evaporation intensity method is based on the evaporation of water and evaporation intensity to calculate the volume of the drying chamber, and then according to the relationship between the diameter and height to calculate the effective height.

 

Second, the diameter of drying chamber

  Another method is to calculate the required air dosage through material accounting and heat accounting, and then determine the diameter of the dryer according to the range of air velocity.

 

Third, the height of the dryer and grading particle size

  From the hot air distributor out of the hot air into the tangential direction through the ring-shaped gap into the drying chamber, the drying chamber of the material in the hot air under the action of blowing and stirrer driven by the spiral rotating upward movement. The study of smaller particles in the centrifugal force field under the action of fluid movement, the effect of gravity is very small, so it can be ignored.

 

Fourth, the application of rotary flash dryer

  Part of the operating conditions of the rotary flash dryer, the upper part of the drying chamber is equipped with a grading ring, whose role is mainly to make the larger particles or not drying the material and qualified product separation, blocking the drying chamber can effectively ensure that the product size and moisture requirements. Replacing the grading ring with different diameters can meet the requirement of product size. The hot air population at the bottom of the cone is equipped with cold air protection to prevent the material from overheating and deterioration in contact with high temperature air. The drying system is closed, and operated under micro-negative pressure, the dust is not leaked, to protect the production environment, safety and hygiene.