Drying and screening process of NPK fertilizer production line
Drying and screening are indispensable links in the NPK fertilizer production line , playing a key role in ensuring the quality of fertilizer products. The fertilizer granules after granulation contain a certain amount of moisture. If not removed in time, they are not only prone to clumping, but also affect the storage period and effectiveness of the fertilizer. Therefore, the particles first enter the drying process. Drying equipment usually uses fertilizer dryers, commonly including drum dryers . The particles slowly move forward in the dryer as the drum rotates, while high-temperature hot air is blown in from the other end. Hot air comes into full contact with particles and carries away the moisture in the particles through heat transfer. During the drying process, it is necessary to strictly control the temperature and residence time. Excessive temperature may lead to the decomposition of certain components in fertilizers, affecting nutrient content; If the resid...