Flash dryer and boiling dryer are two commonly used drying equipment, and they have some differences in structure and working principle.
Inlet direction and speed control:
The inlet air of the flash dryer is in the tangential direction, which means that the air enters from one side of the equipment and rotates around the center. The rotational wind speed in the drying section is determined by the inlet air velocity and is always an indefinite value. This design makes the contact time between the air and the material relatively long, which is conducive to the drying of the material.
The boiling dryer is different in that the direction of the air inlet is radial, and air enters from one side of the equipment and flows along the rotating boiling bed. This design results in a shorter contact time between the air and the material, but a higher drying efficiency. In addition, the rotating wind speed of the boiling dryer is powered by the high-speed rotating crushing disc, which is not disturbed by the system, thus ensuring the reliability of production and the stability of product quality.
Grading device: Flash dryers usually use a grading ring as their grading device, which can adjust the speed to adapt to the drying needs of different materials.
The boiling dryer uses a unique grading device that automatically classifies the material according to its size and degree of dryness. This type of classifier usually consists of multiple screens of different sizes, through which air separates the materials of different sizes. This grading method is more precise and efficient, allowing for better control of the particle size and dryness of the material.
Silencer and noise control:
Boiling dryers are often equipped with a unique silencing device that reduces production noise and provides a quieter working environment. This design is more in line with the needs of modern factories for environmental protection and noise control.
Flash dryers may not have a dedicated silencer, so their noise levels may be relatively high.