Tag: fertilizer granulator

organic fertilizer equipment

Benefits of Using a Disc Granulator in Organic Fertilizer Production Lines

by organic fertilizer production line

Among the core equipment in organic fertilizer production lines, disc granulators are the preferred choice for many companies, especially small and medium-sized production lines, due to their strong adaptability, high-quality granulation, and convenient operation. They significantly improve production efficiency and product quality.

The disc granulator‘s most prominent advantage is its excellent granulation performance. Its unique disc structure uses the synergistic effect of centrifugal force and gravity to create a stable “rolling granulation zone” within the disc, achieving a granulation rate exceeding 90%, far exceeding that of some extrusion granulation equipment. The resulting granules are not only highly rounded and smooth, but also uniform in size (typically controlled within 2-5mm). This not only prevents nutrient loss due to granule breakage during transportation, but also meets the granule shape requirements of mechanized fertilization, significantly enhancing product market acceptance.

Secondly, it offers excellent raw material compatibility. Organic fertilizer raw materials come from a wide range of sources, from decomposed chicken manure and cow dung to straw powder and mushroom residue, with widely varying composition. The disc granulator can easily adapt to different raw material characteristics by adjusting the disc inclination angle (45°-55°), rotation speed (15-20 rpm), and feed rate.

Disc granulators also offer significant advantages in terms of operation and cost. The device boasts a simple structure, with the disc and drive system as its core components. Routine maintenance requires only regular inspections of bearing wear and disc flatness, resulting in maintenance costs approximately 30% lower than those of a drum granulator. Furthermore, its energy consumption is low, with a single unit consuming approximately 5-10 kWh per hour. This makes it suitable for the production needs of small and medium-sized production lines (with a single unit capable of flexibly adjusting daily output to 5-20 tons). The investment threshold is significantly lower than that of large-scale drum granulation equipment, enabling companies to quickly achieve operational and profitability.

Disc granulators also align with green production trends. Their enclosed design reduces dust emission from raw materials, and combined with a spray moisturizing system, they effectively control dust pollution during the production process. Some units can also be integrated into the production line’s waste heat recovery system, further reducing energy consumption. For organic fertilizer production companies that pursue high efficiency, economy and environmental protection, disc granulator is undoubtedly the ideal choice to balance quality and cost.

organic fertilizer equipment

How does a rotary drum granulator work in an organic fertilizer production line?

by organic fertilizer production line

In an organic fertilizer production line, a rotary drum granulator is the core equipment for converting powder into granules. Its operating principles revolve around material agglomeration and granulation. Through a combination of physical and mechanical processes, it transforms fermented organic raw materials into granular products that are easy to store, transport, and apply.

After the equipment is started, fermented and pulverized organic materials (such as decomposed cow dung and straw powder) are introduced into the inclined drum of the rotary drum granulator along with an appropriate amount of binder (usually water or starch solution). The drum rotates at a constant speed of 10-15 revolutions per minute. Lifting plates on the inner wall of the drum continuously scoop up and drop the material, creating continuous agitation and mixing. During this process, the binder moistens the surface of the raw material particles, forming a sticky interface and paving the way for particle agglomeration.

As the drum rotates continuously, the material gradually forms tiny “master particles” under the combined effects of gravity, centrifugal force, and friction. These masterbatch particles continuously roll within the drum, attracting surrounding powdered raw materials like a snowball, gradually increasing in size. Furthermore, the drum’s tilt angle (typically 3-5°) ensures that the material moves slowly toward the discharge end, preventing accumulation within the drum and ensuring that each particle is evenly stressed and grows.

To ensure pellet quality, the drum granulator also uses a temperature control system to regulate the drum temperature (typically between 40-60°C). This prevents excessive moisture content from causing pellet adhesion, while also preventing low moisture content from affecting agglomeration. When the pellets reach the preset size (typically 2-5mm, controlled by adjusting the drum speed and residence time), they are discharged from the discharge end and enter the subsequent drying and cooling processes.

Compared with other granulation equipment, the advantages of the rotary drum granulator are large processing capacity (a single device can produce 50-200 tons of fertilizer per day), high particle strength (compressive strength can reach 15-30N), and strong adaptability to raw materials. Whether it is poultry and livestock manure, straw or mushroom residue, it can be granulated stably. It is an indispensable key equipment in large and medium-sized organic fertilizer production lines.

organic fertilizer equipment

Double axis Mixer: The “Golden Blender” of NPK Fertilizer?

by organic fertilizer production line

In the NPK compound fertilizer production chain, the double axis mixer, like a skilled “golden blender,” silently shouldered the crucial task of uniformly mixing raw materials. The nutrient accuracy of NPK fertilizer directly impacts crop growth. With two counter-rotating mixing shafts and staggered mixing blades, the twin-shaft mixer can quickly blend and stir raw materials of varying properties, such as urea, monoammonium phosphate, and potassium chloride, into a uniform mixture, eliminating nutrient gaps and laying a perfect foundation for subsequent granulation.

This NPK fertilizer production line relies on the coordinated efforts of multiple devices. Before the double axis mixer enters the production line, the raw material crusher crushes the lumpy phosphate rock and potash fertilizer granules, refining the raw materials to a particle size that meets the mixing standards. Next, the batching scale, like a rigorous “measurer,” accurately weighs the amount of each raw material according to the preset nitrogen, phosphorus, and potassium ratios to ensure the exact nutrient ratio. When the double axis mixer completes mixing, the fertilizer granulator takes over, squeezing and rolling the uniform mixture into granules of uniform size. Finally, the drum fertilizer dryer and cooler work in sequence.

The dryer removes excess moisture from the pellets, the cooler cools the pellets to room temperature to prevent clumping, and the screener removes unqualified pellets for reprocessing to ensure the quality of the finished product.

The advantages of the double axis mixer are particularly prominent in this production line: its mixing efficiency is 30% higher than that of conventional mixers, and its mixing uniformity exceeds 95%. It can also adjust the speed to suit different raw material characteristics, reducing both material waste and energy consumption. Fertilizer plants around the world now rely on this production line to produce NPK fertilizers tailored to the needs of various crops.

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