Many friends who do chemical powder processing will encounter a very headache problem.
Like various ultrafine chemical powders and mineral powders, the particles are particularly light and fine. If there is wind or airflow disturbance in the drying equipment, the powder is very easy to float up and scatter around.
Not only does it cause material loss and waste of raw materials, but dust dispersion can also pollute the workshop environment. At the same time, ultrafine dust is suspended in the air, which also poses certain safety hazards. This has been a difficult drying problem for many powder processing industries to solve.
So many people are curious: when microwave tunnel ovens dry ultrafine chemical powders, the temperature is increasing and the material is dehydrating, why does the powder hardly scatter or dust?
Today, I will explain the principles in a simple and understandable way to everyone.
The principle of conventional hot air drying and oven drying is to use hot air circulation to remove moisture. The device will continuously generate a flowing airflow inside, and the wind will continue to blow. And lightweight chemical powders themselves have extremely low weight. As long as there is wind, small particles will be swept up by the airflow, naturally resulting in dust, flying powder, and material layering and loss.
But the principle of microwave drying is completely different. Microwave does not belong to hot air drying, it does not rely on blowing or circulating airflow for heating. During the entire drying process, except for the dehumidification system, there is almost no air convection inside the equipment chamber, and the internal environment is static. Simply put, without wind, there is no power to take away powder, which is the core reason why powder will not scatter.
QQ