(I) Working Principle of Centrifugal Spray Dryer: Air is heated by a heater and enters the hot air distributor at the top of the drying chamber. It then evenly distributes into the drying chamber, while the liquid material is pumped by a screw pump to a centrifugal atomizer at the top of the chamber, forming extremely small droplets. This allows the liquid material and hot air to come into contact in parallel flow, causing rapid evaporation of moisture. The equipment produced by Yuanze Drying dries the product into a finished product in a very short time. Most of the powdered product is collected and packaged by the lower cone. The humid air enters the cyclone unloader through the exhaust duct, unloading a small portion of the product carried away by the humid air, and then is discharged through a bag filter (or water film dust collector).
(II) Performance Characteristics of Centrifugal Spray Dryer:
1. Fast drying speed: After atomization, the specific surface area of the liquid material increases significantly, allowing 90%-95% of the moisture to evaporate instantly in the hot air. The drying process is completed in only 5 to 35 seconds.
2. The material itself is not subjected to high temperatures; most of the heat from the hot air contacting the material is used for moisture evaporation, making it particularly suitable for drying heat-sensitive materials.
3. The atomizer's speed can be adjusted by frequency conversion, making it easy to control the product particle size. The resulting product has uniform particle size, good flowability, excellent solubility, and high purity.
4. Simple operation, stable performance, convenient adjustment and control of the liquid flow rate, and can be automated.
5. No environmental pollution, no waste liquid discharge, and dust emissions meet national standards.
6. Wide range of liquid particle sizes, no need for strict filtration equipment, the atomizer is not easily clogged, and it is also suitable for materials with high viscosity.
7. Wide range of applications, including hot air drying, granulation, cooling granulation, spray crystallization, and reactions.
