The HSUP series of vibrating fluidized bed dryers, developed by Chenghai Company, have revolutionized the drying industry by completely replacing traditional fixed and vibrated fluidized bed dryers from domestic manufacturers. For any solid material, we can always implement a dual-vibrator system that ensures efficient and uniform drying with minimal energy consumption. In the ammonium sulfate industry, our dual-mass vibrating fluidized bed is considered the best in the country and even internationally, excelling in design, performance, functionality, and product quality. It effectively overcomes the limitations of traditional fluidized beds in China.
This advanced series of equipment integrates a new vibration mechanism and structural design for more effective fluidization and drying. It incorporates cutting-edge technologies to eliminate the drawbacks of conventional systems, such as fixed fluidized beds and two-side vibration motor-driven units. By doing so, it removes outdated methods and enhances overall efficiency.
Chenghai’s dual-mass vibrating fluidized bed offers exceptional stability, with uniform and synchronized excitation force. The bed surface is supported by leaf springs, ensuring it remains flat at all times. Combined with horizontal air distribution technology, this prevents issues like material death, movement, agglomeration, sticking, or backmixing. This unique vibratory conveying method allows for extended bed lengths, up to 20 meters, making it ideal for handling high-humidity, large-bulk, and difficult-to-handle materials—such as those with large particle size variations, fibers, leaves, ultrafine powders, lightweight, and heavy-density materials.
The HSUP system features a powerful automatic control system and scientific monitoring optimization technology, ensuring the lowest possible energy consumption while meeting process requirements. Compared to other domestic dryers, Chenghai’s equipment is significantly more energy-efficient.
This vibration mode achieves an ideal plug-flow (sub-fluidized) state, where material moves uniformly without backmixing. The airflow is just below the fluidization velocity, minimizing particle movement and ensuring consistent forward motion. Each particle moves the same distance during each vibration, resulting in even distribution and no mixing. This leads to lower air requirements, reduced auxiliary equipment, and significant energy savings.
In a plug-flow state, the material layer avoids bias flow, channel flow, and hysteresis, ensuring stable fluidization. Thermal energy utilization is maximized, with precise heat and mass transfer between hot air and material. Exhaust gas temperature is controlled to near saturation, reducing heat loss. The low wind speed minimizes product damage, preserves appearance, and reduces friction. Many products benefit from this ideal condition through a combination of fluidization and sub-fluidization techniques.
With an airflow velocity range of 0.2–5 m/s, the system supports a wide variety of processes, including rewetting granulation, spray granulation, coating, agglomeration, inert particle drying, cooling, sterilization, calcination, reaction, closed-cycle drying, solvent recovery, and hot air circulation.
The system allows for precise control of residence time (5–160 minutes), ensuring uniform temperature and humidity. It also uses horizontal airflow technology to create an air cushion, isolating the material from the bed and preventing sticking, overheating, and agglomeration.
The application scope is broad, accommodating materials with particle sizes under 60 mm and temperatures up to 600°C. This makes it suitable for high-temperature drying of large materials, which is an effective way to save energy.
The bed surface can be custom-designed, allowing flexible adjustment of material residence time and drying temperature. There is no conflict between required drying time and the bed’s capacity, enabling precise control over the drying process.
Compared to belt dryers, the dual-mass vibrating fluidized bed offers higher drying efficiency, greater capacity, and better performance. Especially in low-temperature drying, its advantages are clearly demonstrated.
Large-scale equipment with a single bed area of 44 m² provides high throughput and eliminates the need for multiple beds in series. For materials requiring long drying times, one bed is sufficient to complete the process.
Advanced evaporative cooling technology is integrated to improve energy efficiency and reduce operational costs.
The user-friendly design simplifies installation and maintenance. The equipment includes self-cleaning features, eliminating manual cleaning and reducing daily maintenance. It is easy to operate and designed with the operator in mind.
Additional functions such as stirring, screening, mixing, and crushing can be incorporated as needed.
High automation and stable performance ensure reliable operation. The PLC system automatically adjusts air volume based on feed rate and humidity, preventing unnecessary energy loss. The system’s stability prevents issues like sticking, channeling, or backmixing, eliminating the need for constant monitoring.
An internal dust collection system captures airborne particles and returns them to the bed, eliminating the need for additional dust collectors or pneumatic conveying systems.
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