In the field of organic fertilizer production, disc granulators and roller extrusion granulators are commonly used equipment, each with its own characteristics.
From the perspective of granulation principle, the disc granulator aggregates materials into granules through continuous rolling on a rotating disc, utilizing centrifugal force, friction force, and gravity, with a relatively gentle process; The roller extrusion granulator relies on strong pressure to forcefully extrude the material through the mold holes, resulting in a more robust granulation process.
In terms of particle quality, the particles produced by the disc granulator have a rounded shape, relatively uniform size, and are more evenly distributed in the soil, which is conducive to the absorption of nutrients by crops. However, its particle strength is average. The particles produced by the roller extrusion granulator have high density and strength, and are not easily crushed and powdered during storage and transportation, but their shape is mostly cylindrical and relatively single.
In terms of raw material adaptability, the disc granulator has strict requirements for raw material humidity and viscosity, as being too dry or too wet can affect the granulation effect. The roller extrusion granulator has stronger adaptability to raw materials, and can handle materials with high viscosity and fiber content well.
In terms of production efficiency, the disc granulator has a simple structure, easy operation, strong continuous production capacity, and is suitable for large-scale production. The production efficiency of the roller extrusion granulator is not low, but the equipment structure is complex and difficult to maintain, which will to some extent affect the continuity of production.
In terms of energy consumption, the disc granulator mainly relies on disc rotation, which has relatively low energy consumption; The roller extrusion granulator requires strong pressure and high energy consumption.
In terms of investment cost, the price of the disc granulator is relatively cheap, and the initial investment is small; The cost of roller extrusion granulator equipment is high, and the cost of mold replacement is also not low.
In summary, if pursuing a beautiful particle appearance, high production efficiency, and low investment cost, a disc granulator is a good choice, suitable for producing organic fertilizers with low requirements for particle strength. If the raw materials are complex and diverse, with high requirements for particle strength and shape control, the roller extrusion granulator can better meet the needs, despite its high energy consumption and cost.