TAOBO destoner operates by leveraging the dual action of specific gravity differences and airflow assistance to separate beans from high-density impurities such as stones and soil clods; it is suitable for a variety of crops, including red kidney beans, chickpeas, pigeon peas, and sesame seeds.

The raw material is evenly spread across an inclined, reciprocating vibrating screen deck, while a fan continuously directs a low-pressure airflow upward through the screen surface. Lighter beans are buoyed by the airflow and remain suspended in the upper layer, whereas denser, heavier stones and soil clumps cannot be lifted and instead remain in contact with the bottom of the screen deck.

The screen deck undergoes small-amplitude reciprocating vibrations and features a surface pattern of raised, fish-scale-like perforations. The beans in the upper layer move forward toward the discharge end along the incline of the screen, while the heavy stones at the bottom are obstructed by the fish-scale pattern; driven by the vibration, they continuously climb in the opposite direction toward the stone collection end, thereby achieving a counter-flow separation of beans and stones.

Key Features of the Legume Destoner

✅ Thorough destoning with minimal product loss.

Utilizing a combination of airflow and gravity-based vibratory separation, stones and soil clumps are effectively removed. The stone discharge outlet is equipped with an air-recirculation system that blows any entrained whole red kidney beans or chickpeas back into the main product stream, minimizing waste and ensuring high raw material utilization.

✅ Food-Grade Compliant Design

Parts in contact with grain are made of stainless steel; the surface is free of burrs, resistant to dirt and dust accumulation, and easy to clean. The design complies with food processing hygiene standards in the EU and various African nations, making it suitable for export-oriented legume processing operations.

✅ Highly versatile; suitable for a wide range of grains and legumes.

Parts in contact with grain are made of stainless steel; the surface is free of burrs, resistant to dirt and dust accumulation, and easy to clean. The design complies with food processing hygiene standards in the EU and various African nations, making it suitable for export-oriented legume processing operations.

The significance of removing stones from red kidney beans using beans destoner

✅ Ensuring product quality and meeting export inspection standards

After undergoing thorough destoning, the red kidney beans contain negligible amounts of stones; the finished product is clean, vibrant in color, and free of hard impurities, enabling it to successfully pass food safety inspections in the EU, Africa, and the Middle East, thereby securing stable export orders.

✅ Preventing severe wear and equipment downtime caused by jams

Stones are significantly harder than red kidney beans; if they enter polishing or gravity separation machines, they can scratch polishing rollers and puncture screens, leading to equipment jams and motor shutdowns due to overload. Removing stones beforehand drastically reduces the cost of replacing parts, ensures the continuous 24-hour operation of the production line, and lowers factory maintenance and operating expenses.

✅ Minimizing raw material loss and increasing finished product yield

Without a destoning process, grit and stones would be polished and sorted alongside the beans; the resulting friction and compression would cause a large number of beans to break, thereby reducing the yield of premium-grade beans.

It delivers excellent overall destoning performance, achieving a removal rate of over 99% for stones and grit of various sizes while minimizing bean loss. It ensures stable, continuous operation over the long term, and the processed beans fully meet international cleanliness standards for food exports, making it an indispensable piece of pre-processing destoning equipment for bean production lines.

The Taobo Destoner features a compact, modular design that minimizes the factory floor space required. With highly standardized inlet and outlet heights, it can be integrated directly in series with air-screen cleaners, gravity separators, and polishers, making it suitable for complete cleaning lines in both small- and large-scale bean processing plants.