As the main pelletizing equipment of organic fertilizer making machine, the main structure of rotary drum pelletizer is an inclined rotary cylinder, which can be driven by constant speed or variable speed. When the liquid content of the feed powder is appropriate, it will agglomerate and roll in the drum. The rotary drum has a certain slope, and the angle between its axis and the horizontal is less than 10 degrees, which can help the material roll along the length of the drum.
The feed end of the rotary drum granulator is often equipped with a retaining ring to prevent the material from flowing back. A retaining ring can also be installed at the discharge end to increase the thickness of the material layer and prolong the residence time in the main drum. In other occasions, the spiral discharge ring is often used to transport the material to the screen at the back end of the drum.
Sometimes, the drum granulator's cylindrical screen and drum are integrated to form a product discharge port. The feeding system can use belt conveyor, chute pipe or other similar equipment. The adhesive liquid is injected either before the solid material enters the rotary cylinder or immediately after the solid material enters the rotary cylinder.
