The dual-mass vibrating fluidized bed dryer represents the next generation of large-scale drying technology, offering exceptional efficiency, energy savings, and superior performance. It excels in handling materials that are typically difficult to dry with conventional systems, making it a versatile solution across various industries such as petrochemicals, fine chemicals, pharmaceuticals, food processing, grain and oil, feed, salt, seafood, and ultra-fine material drying.
This advanced dryer consists of an upper chamber, a bellows, a base, and a fluidized bed. The upper chamber and bellows form the upper body, while the lower body is connected via plate springs and spiral springs. To isolate vibrations from the foundation, rubber buffers are used between the lower body and the base. At the rear of the bellows, a box-type exciter is installed, driven by a motor through a transmission shaft. This exciter generates both horizontal and vertical forces, with the leaf spring (resonance spring) playing a key role in creating the necessary vibration for material movement.
The horizontal force propels the material forward, while the vertical component lifts the material along with hot air passing through the nozzle plate, achieving a fluidized state. This ensures even heat transfer and efficient drying. The material is then discharged through an overflow weir and hopper, completing the drying process seamlessly.
By placing the excitation source at the front of the equipment, the overall stress distribution is improved, allowing the dual-mass system to replace multiple standard vibrators in series. This not only reduces capital investment but also lowers construction costs. The advanced vibration design ensures synchronized movement across the entire length and width of the bed, eliminating common issues like uneven current flow and channeling found in traditional dual-motor systems.
With increased length and area, the residence time of the material is significantly extended, which is ideal for drying larger particles. The combination of vibration and reduced fluidization velocity helps minimize wear and maintain particle stability during the process.
High-frequency vibrations ensure a more uniform distribution of hot air, enhancing heat transfer efficiency between the air and the wet material. Additionally, this vibration prevents local dead zones, wall buildup, and channeling—common problems in stationary fluidized beds. As a result, the dual-mass system can effectively handle viscous polymers and organic materials.
The dryer features a distribution board covered with a duckbill-shaped hood, which generates horizontal airflow, reducing product contact with the dryer floor and overheating. It also applies high-speed shear to large particles, ensuring even fluidization. When the machine stops, the hood prevents products from falling into the pressure equalizing bellows. An adjustable overflow weir allows for consistent material levels during operation, and observation windows on either side of the fluidization chamber make it easy to monitor the drying process.
**Application Areas:**
MBS, ABS, adipic acid, polyacrylamide, acrylamide crystals, polytetrafluoroethylene, phenolic resin, nylon, polypropylene resin, polyester chips, polyvinyl chloride, soda ash, salt, ammonium nitrate, potassium carbonate, potassium chlorate, potassium chloride, potassium nitrate, potassium phosphate, potassium sulfate, fermented feed, extruded granule feed, organic fertilizer, alcohol waste, antibiotic residue, and more.
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