Rotary flash dryer four major process design method

Abstracts:

Rotary flash dryer new equipment using a variety of devices, such as the use of a variety of feeding devices, so that the feeding of continuous and stable, feeding process will not produce bridging phenomenon; dryer bottom with a special cooling device, to avoid the material in the bottom of the high-temperature area of the phenomenon of sticking to the wall and deterioration; the use of a special pneumatic sealing device and bearing cooling device, effectively extend the service life of the transmission part…

            Rotary flash dryer new equipment using a variety of devices, such as the use of a variety of charging devices, so that the charging of continuous and stable charging process will not produce the phenomenon of bridging; the bottom of the dryer using a special cooling device, to avoid the material in the bottom of the high temperature area of the phenomenon of sticking wall and deterioration; the use of a special pneumatic sealing device and bearing cooling device, effectively extend the service life of the transmission part; the use of a special wind distribution device to reduce the resistance of the equipment, and effectively provide the dryer processing air volume; the drying chamber is equipped with grading ring and cyclone sheet, can adjust the material fineness and final moisture; the use of stirring and crushing device, the material to produce strong shear It adopts special air separation device, which reduces the resistance of the equipment and effectively provides the processing air volume of the dryer; 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 floatation and rotating effect on the material; it adopts air filter, cyclone separator and bag duster, which can effectively remove the dust and avoid the pollution of the environment and material. This equipment has strong mass and heat transfer, high production intensity, short drying time and short material residence time. So today by the experienced Changzhou area drying equipment manufacturers to introduce you to the rotary flash dryer of the four major process design methods!

I. Determination of 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 method 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 diameter and height to calculate the effective height.

II. Diameter of drying chamber
Another method is to calculate the required air consumption through material accounting and heat accounting, and then determine the diameter of the dryer according to the range of air velocity.

III. Height of dryer and graded 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. Study of smaller particles in the centrifugal force field under the action of fluid movement, the effect of gravity is very small, and therefore can be ignored.

IV. 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.