Fertilizer Granulation Machine Equipment & Systems, Rotary Drum Compound D NPK Granulator Factory - Video

https://npk-fertilizer.com/ A Tongli rotary drum granulator is a type of fertilizer granulation equipment used in the production of compound fertilizers. It consists of a rotating drum, which is typically lined with a rubber lining for durability. The drum is inclined slightly and driven by a motor, causing the material inside to tumble and mix.

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How does a rotary fertilizer granulator work?
Material Feeding: Raw materials, usually a combination of nitrogen, phosphorus, and potassium sources along with other additives, are fed into the rotating drum.
Spraying Liquid Binder: A liquid binder, typically water or a solution containing phosphoric acid or ammonia, is sprayed onto the material inside the drum. This helps to agglomerate the particles and form granules.
Granule Formation: As the drum rotates, the material inside rolls and tumbles. The combination of the tumbling action and the liquid binder causes the particles to adhere together, forming granules.
Drying: After the granulation process, the granules may still contain excess moisture. To remove this moisture and stabilize the granules, the product is typically passed through a dryer, which can be a separate unit or integrated into the granulator itself.
Screening and Coating (optional): Once dried, the granules may be screened to remove oversized or undersized particles. They can also be coated with additional nutrients, coatings, or anti-caking agents to improve their quality and handling characteristics.

What is the structure of a rotary drum granulator?
Rotating Drum: The main component where the granulation process occurs. It is typically made of stainless steel or lined with rubber for durability.
Motor and Drive System: Provides the necessary power to rotate the drum.
Support Frame: Supports the drum and other components.
Liquid Spraying System: Consists of nozzles or sprayers that evenly distribute the liquid binder onto the material inside the drum.
Discharge Chute: Allows the granulated product to exit the drum and be transported to subsequent processing steps.
Drying System (optional): If integrated, this system includes a heat source, such as a burner or electric heater, and a means of removing moisture, such as a hot air flow.
Control System: Regulates the operation of the granulator, including drum speed, liquid spraying rate, and temperature control for drying.
Overall, the rotary drum granulator offers an efficient and versatile method for producing compound fertilizers in a continuous process.

What is the difference between steam drum granulation and roller extrusion granulation?
Steam granulation involves the use of steam as a binder to agglomerate fine powder particles into granules. In this process, dry powder particles are mixed with a small amount of water and then exposed to steam, which causes the particles to become sticky and adhere to each other, forming granules. The granules are then dried to remove excess moisture and improve their stability.

On the other hand, roller press extrusion granulation utilizes mechanical pressure to compact and agglomerate powder particles into granules. In this method, the powder is fed between two counter-rotating rollers, which exert high pressure on the powder, forcing it to form into dense, uniform granules. The granules produced by roller press extrusion granulation typically have a higher density and better flow properties compared to those produced by steam granulation.

Overall, while both steam granulation and roller press extrusion granulation are effective techniques for granule production, they differ in their mechanisms of action and the properties of the granules they produce.

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