New Type Organic Fertilizer Granulator

The new type organic fertilizer granulator is a wet-process pelletizing machine specifically designed to overcome the challenges of granulating fermented organic materials. Materials such as fermented chicken, sheep, and cattle manure are characterized by high fiber content, high moisture, and inconsistent adhesiveness. Inside the vertical cylindrical chamber, the machine uses high-speed rotating mixing paddles to toss the material into the air; a fine water spray allows the particles to tumble and bond into pellets as they move through the air and against the chamber walls. Because the material remains in constant motion within the chamber—without stagnating or accumulating—issues such as clogging and wall adhesion are significantly minimized. The machine features a simple structure, with the mixing paddle disc and spray pipe serving as the core components, making both operation and maintenance straightforward.

Working Principle of New Type Organic Fertilizer Granulator

The pelletizing process of this new type organic fertilizer granulator combines three mechanisms: centrifugal throwing, spray wetting, and rolling agglomeration. Upon entering the vertical chamber, the powdered material lands on a high-speed rotating paddle disc, where mixing rods forcefully propel the material outward along a tangential path. This creates rotating curtains of material that extend from the edge of the disc to the upper sections of the chamber wall. An annular spray pipe located above the chamber sprays atomized water onto the material curtains; as the powder particles pass through the spray zone, their surfaces are evenly wetted, forming an ultra-thin liquid film. As the wetted particles continue to move and collide within the chamber, the surface tension of the liquid film binds them together, initially forming tiny granule nuclei. These nuclei are repeatedly tossed up by the paddle disc and tumble down along the chamber wall; through this cyclical motion, they continuously contact fresh wetted powder, adhering to it and growing in size.

Common Issues for New Type Organic Fertilizer Granulator

Insufficient granule strength is usually caused by inadequate water spraying or poor material adhesiveness. When moisture levels are low, the liquid film between particles is too thin, resulting in weak bonding and a loosely packed internal structure. Certain materials—such as pure straw powder or rice husk powder—have inherently poor adhesiveness, making it difficult to form pellets using water alone. In such cases, the formulation must be adjusted by adding an appropriate amount of fermented manure or a small quantity of binders (such as bentonite or starch), while also increasing the water spray volume.

If the mixing disc vibrates abnormally or emits a metallic clanking sound during operation, the common cause is long-fiber material wrapping around the disc or the entry of a hard object. Organic fertilizer raw materials inevitably contain incompletely pulverized long fibers—such as straw or hemp rope—which wrap around the mixing rods and accumulate, disrupting the dynamic balance of the disc. This issue can be resolved by shutting down the machine, removing the mixing rods, and clearing away the wrapped material.

If the discharged granules have "tails" or are irregular in shape, the mixing disc speed and water spray position may be poorly coordinated. If the rotation speed is too slow, the material is not thrown upward effectively; granules spill out without sufficient tumbling inside the drum, resulting in irregular shapes. If the spray position is off, some material remains dry, and dry powder adheres to the surface of wet granules, creating protrusions. Adjusting the rotation speed and spray angle is necessary.

Intermittent discharge is usually caused by uneven feeding. Unstable feeding screw speed or material bridging in the hopper leads to fluctuating material flow and varying material bed thickness inside the granulator, naturally causing unstable discharge. Maintain an appropriate amount of material in the hopper and ensure a stable feeder speed.

Maintenance Methods for New Type Organic Fertilizer Granulator

Perform checks before and after each production shift. Before starting, inspect the mixing disc for residual dried material clumps and remove them completely. Check the spray nozzles for blockages; clear any clogs using a thin steel wire. After shutdown, clean wet material adhering to the inner drum walls and mixing disc; once dried, wet organic fertilizer material becomes very hard and can accelerate mixing rod wear during the next startup. If the machine remains idle for more than two days, it is best to flush the interior of the drum with clean water.

Inspect the mixing disc weekly. Mixing rods are the components most prone to wear; check the extent of wear on the rods and ensure mounting bolts are tight. Severely worn rods reduce material dispersion and granulation efficiency; replace them promptly.

Clean the spray system monthly. The water used for organic fertilizer granulation—typically well water or tap water—contains impurities and microorganisms that accumulate over time, forming scale and sludge on the inner pipe walls and affecting spray uniformity.

Lubricate the gearbox and bearings. Change the gearbox oil after the first 500 hours of operation, and subsequently every six months or every 2,000 hours of operation. Apply grease to the main shaft bearings every three months; the fill level should be between one-half and two-thirds of the bearing cavity volume, as overfilling can cause the bearings to overheat during operation.

Target Users for New Type Organic Fertilizer Granulator

Livestock and poultry farms with in-house fertilizer processing facilities. Manure from chicken, pig, cattle, and sheep farms can be fermented and then processed into organic fertilizer granules using this equipment; the product can be used on-site or packaged for sale to generate additional revenue. A medium-sized unit with an hourly output of 1–2 tons can handle the manure output of a medium-scale farm; the investment is modest, and the payback period is short.

Township-level organic fertilizer processing centers. By leveraging raw materials and sales channels from local farms and agricultural bases, operators can purchase this equipment to set up small processing workshops, consolidating scattered livestock waste for processing into commercial organic fertilizer granules. The equipment is easy to operate and maintain, making it well-suited to the local rural workforce.

Bio-organic fertilizer startups. This process involves adding functional microbial agents to fermented organic materials and granulating them at ambient temperature; this minimizes the loss of microbial activity and creates a product with strong market appeal. The investment scale is manageable, making it an ideal choice for entrepreneurs and investors entering the organic fertilizer industry for the first time.