Cocoa bean cleaning machine

Cocoa bean cleaning machine can ensure the purity and quality of cocoa beans before further processing.

It is a combined system made up of five key units: a pre-cleaner for removing light and large impurities, a de-stoner for separating stones, a gravity separator for eliminating defective beans, a magnetic separator for extracting metal particles, and a grader for size classification.

By adopting advanced airflow separation, vibration screening, and magnetic selection technologies, the machine achieves a cleaning efficiency of over 99%, guaranteeing uniform and contaminant-free raw materials.

This equipment is widely applied in cocoa processing plants and other agricultural product cleaning industries, providing a reliable foundation for high-quality chocolate and cocoa product production.

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Cocoa bean cleaning machine working video

1. Cocoa bean cleaning machine

The cocoa bean cleaning machine is specially designed to remove light, small, and large impurities from raw materials, ensuring cocoa beans are clean and safe for further processing.

It can effectively handle not only cocoa beans but also a wide range of grains, seeds, and agricultural by-products such as corn, wheat, rice, soybeans, millet, sunflower seeds, grass seeds, spices, and more.

By integrating screening and air separation, the machine guarantees efficient cleaning, improves the overall quality of the raw materials, and lays a solid foundation for high-standard cocoa production.

How does the cocoa bean cleaning machine work?

• Feeding: Cocoa beans are fed into the hopper, where the feed roller distributes them evenly for smooth processing.

• Initial air separation: As beans pass through the top sieve plate and control gate, an air duct provides suction to remove husks, straw, dust, and shriveled beans.

• Screening by size: The material moves across layered sieves, where beans are separated according to width and thickness.

• Air screening and suction chamber: Graded beans enter the air screen and suction chamber, where strong upward airflow removes remaining light impurities.

• Discharge: Finally, clean cocoa beans and separated impurities are automatically discharged through different chutes for collection.

Cocoa bean cleaning machine features

• Capacity: 10–15 tons/hour.
• Zero-damage bucket elevator for bean protection.
• Adjustable airflow for different materials.
• Closed air channel for eco-friendly operation.
• High-quality vibration sieve with self-cleaning rubber balls.
• Movable design with tires for easy relocation.
• Branded electrical components ensure stability.
• High efficiency & easy operation.

Cocoa bean cleaning machine parameters

2. Destoner machine

The Destoner Machine is specifically designed to separate stones and heavy impurities from raw materials, ensuring a cleaner and higher-quality final product.

The machine operates based on the difference in density between the seed crops and stones. By adjusting the pressure and vibration frequency, the Destoner effectively separates stones from grains, achieving a stone removal efficiency of over 99.5%. This makes it an essential piece of equipment in seed processing.

Destoner machine working principle

• Airflow control: A high-precision multi-blade fan generates airflow. Lighter grains are lifted and suspended in the air, while heavier stones remain lower.

• Mesh separation: Stones, being denser, cling to the stainless steel mesh, while the grains pass through or remain suspended.

• Pressure adjustment: Air pressure is carefully adjusted to optimize the suspension of grains and the settling of stones.

• Vibration control: The Destoner table vibrates, and its frequency is tuned to facilitate precise separation of stones and grains.

• Fine regulation: A frequency conversion control device allows subtle adjustments, ensuring effective separation even when the density difference between stones and grains is minimal.

Destoner machine parameters

3. Gravity separator

The Gravity Separator is specially designed to remove defective or unwanted materials such as bad seeds, moldy grains, insect-damaged seeds, fuzzy or hairy seeds, rotten seeds, seeds affected by black powder disease, seeds with husks, as well as sand and stones mixed in the seeds.

In addition to seed cleaning, the Gravity Separator can also be applied in nut processing, effectively separating kernels from residual shells after dehulling.

By utilizing the density differences between materials, the machine ensures precise separation, resulting in cleaner, higher-grade products suitable for further processing or packaging.

Gravity separator features

• Complete Setup: Includes feeding elevator, gravity table, control box, seven air fans, vibration motor, recycle system, and side conveyor.

• Adjustable Vibration: Frequency-controlled vibration adapts to different seed types.

• Precise Airflow: Seven adjustable air fan chambers with pressure gauges for optimal wind control.

• High Cleaning Efficiency: Recycle system ensures cleaning rate above 99.8%.

• Enhanced Capacity: Side conveyor boosts throughput.

• Durable Table: Aluminum alloy frame with food-grade stainless steel mesh.

• Interchangeable Mesh: Easy-to-change mesh for different seed sizes.

• Mobile Design: Equipped with wheels for easy relocation.

Gravity separator parameters

4. Magnetic separator

The Magnetic Separator can remove metal and magnetic impurities from grains and seeds. It effectively separates metal fragments or magnetic soil particles that may be mixed with raw materials, ensuring the safety and quality of the processed grains.

By eliminating these contaminants, the machine helps prevent damage to downstream processing equipment and improves the overall quality of the final product.

How does the magnetic separator work?

• Grains mixed with metal or magnetic soil pass through a sealed strong magnetic field at an appropriate speed.
• Due to differences in magnetic attraction, metal particles, soil, and magnetic impurities are separated from the grains.
• The machine features a magnetic field strength of 18,000 Gauss and a magnetic separation surface width of 1,300 mm, ensuring high throughput and efficient operation.

Magnetic separator advantages

• Minimal Flux Leakage: Strict magnetic closure enhances separation efficiency.
• Uniform Bulk Grain Flow: Reduces maintenance and minimizes losses from vibration feeders.
• Stable Belt Operation: Precisely ground rollers ensure smooth, deviation-free running.
• Adjustable Speed: Frequency controller adapts rolling speed for different seeds.

Magnetic separator parameters

5. Grading machine

The Cocoa Bean Grader can sort cocoa beans with precision according to their size. At the heart of the machine is a multi-layer vibrating screen, which can be customized to meet specific requirements.

The dimensions of the screen openings—length, width, or thickness—can be adjusted to match the size of the beans, ensuring accurate and consistent grading.

Grading machine parameters

Conclusion

In summary, the Cocoa Bean Cleaning Machine integrates multiple processes such as pre-cleaning, destoning, gravity separation, magnetic separation, and grading, ensuring that impurities like dust, stones, bad seeds, and metal fragments are thoroughly removed.

With its high cleaning efficiency, customizable screen design, and user-friendly operation, this machine not only guarantees the purity of cocoa beans but also enhances production efficiency.

In addition, we also provide a Cocoa Bean Peeling Machine , which can be used in combination with the cleaning line to further improve processing results and support high-quality cocoa production.