Rotary drum granulator is a common equipment for granulating phosphate compound fertilizers, mainly used in the production of monoammonium phosphate (MAP), diammonium phosphate (DAP), nitrogen-phosphorus-potassium compound fertilizer (NPK), triple superphosphate (TSSP), urea-based nitrogen-phosphorus-potassium and other products. The drum ammoniation granulator is used in the process of continuous ammoniation granulation.
Rotary Drum Granulator Structure
• The rotary drum granulator has two rollers installed outside the cylindrical drum, each supported on the front supporting wheel and the supporting wheel support with a blocking wheel setwheelset. The drum is installed on the foundation at an angle. The transmission device is composed of a small gear meshing with a large gear on the drum body, and the drum body is driven by an electric motor to rotate. The machine is equipped with a slurry spraying pipe and an ammonia distributor, and the granulated products are discharged from the discharge box at the tail end of the drum.
• The slurry nozzle adopts a standard centrifugal or spiral nozzle, which requires the spray droplets to be uniform. The size and quantity are selected according to the required spraying amount of the slurry.
• To prevent the material from sticking inside the steel cylinder, several flexible rubber sheets are laid on the inner wall of the cylinder, and they are fixed to the cylinder wall with screws using flat steel strips. The number of flexible rubber sheets and the way they are laid often affect the reliability of production operations. Several breathing holes are opened on the cylinder wall behind each rubber sheet, and the size of the holes should be such that the air between the rubber sheet and the cylinder wall can be quickly removed, ensuring that when the cylinder rotates upward, each rubber sheet automatically sags and deforms due to its own weight and the gravity of the adhesive, and the adhesive cracks and falls off, thereby removing the adhesive on the cylinder wall.
Ammoniated granulation is a production process mainly used to manufacture fertilizer products such as nitrogen fertilizer and urea. In the ammoniated granulation process, nitrogen and hydrogen are usually reacted with a catalyst to generate ammonia, and then ammonia and carbon dioxide are reacted to generate urea. Finally, the urea is granulated and crystallized to obtain a granular urea product. This process usually involves multiple steps, including ammonia preparation, urea synthesis, urea crystallization and granulation. Ammoniated granulation is an important fertilizer production process that improves the quality and production efficiency of nitrogen fertilizer products.
Triple superphosphate (TSSP) is a chemical compound with the chemical name trithiophosphate calcium. It is usually a white crystalline solid and can be used as a type of phosphate fertilizer.
The rotary drum granulator for producing granular TSP has only a granulating device in the drum, and the nozzle is washed with water to atomize the steam and spray it onto the rolling material bed to wet the material and form granules. The speed of the drum should be designed to be adjustable to meet the requirements of the process operation time.
Rotary Granulator for Fertilizer Production Line
In fertilizer production lines, rotary drum granulators are often used in the production of fertilizer granules for chemical fertilizers, organic fertilizers and compound fertilizers.
Continuous production can improve production efficiency and provide an efficient and stable granulation solution for fertilizer production.
