Four design methods for rotary flash dryer

The flash dryer adopts a variety of advanced devices, such as a variety of feeding devices, so that the feeding is continuously stable, the bridging phenomenon does not occur in the feeding process; the special cooling device is adopted at the bottom of the dryer to avoid the sticking of materials in the high temperature region at the bottom. And the deterioration phenomenon; the special air pressure sealing device and the bearing cooling device are used to effectively extend the service life of the transmission part; the special air separation device is adopted to reduce the resistance of the equipment and effectively provide the treatment air volume of the dryer; The ring and the swirling sheet can adjust the fineness and final moisture of the material; the stirring and pulverizing device is used to produce strong shearing, blowing and rotating effects on the material; and the air filter, cyclone separator and bag filter are used to effectively remove Dust, avoid environmental and material pollution. The device has strong mass transfer heat transfer, high production intensity, short drying time and short material residence time. So today, we will introduce the four process design methods of the rotary flash dryer by the experienced drying equipment manufacturer in Changzhou area - Wanqun drying equipment !

a) Determination of the drying chamber

The rotary flash dryer processes the evaporation intensity of some materials. The volumetric heating method is the theoretical design method of the rotary flash dryer. However, in this method, the key volumetric heat coefficient of Zui is difficult to determine, so it lacks operability. The evaporation strength method is an indirect method of volumetric heating method, which can be calculated as long as there is certain experimental data, and is a method commonly used in industrial design. The evaporation strength method calculates the volume of the drying chamber based on the amount of evaporated water and the evaporation strength, and calculates the effective height based on the relationship between the diameter and the height.

　　 b) Drying chamber diameter

Another method is to calculate the required air consumption by material balance and heat balance, and then determine the diameter of the dryer according to the air speed range.

c) the height of the dryer and the graded particle size

The hot air from the hot air distributor enters the drying chamber through the annular gap in a tangential direction, and the material of the drying chamber is spirally rotated and raised under the action of hot air blowing and the agitator. When studying the fluid motion of smaller particles under the action of a centrifugal force field, the effect of gravity is small and therefore negligible.

　 4) Application of dryer

The operating conditions of the partial rotary flash dryer, the upper part of the drying chamber is provided with a step ring, the main function of which is to separate the material with large or no dry particles from the qualified product, and the product in the drying chamber can effectively ensure the product granularity and moisture requirement. Replacing the grading rings of different diameters can meet the product size requirements. Cold air protection is provided at the hot air population at the bottom of the cone to prevent the material from coming into contact with high temperature air to cause overheating. The drying system is closed and operates under micro-negative pressure. The dust does not leak, protecting the production environment, and being safe and hygienic.