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Product Introduction
The Industrial Powder Rotary Dryer is a highly versatile, heavy-duty thermal drying system engineered for continuous, large-scale moisture removal from bulk powders, granules, and fine-grained solids. It is widely utilized across diverse sectors, including chemical manufacturing, mineral processing, metallurgy, food production, and plastics engineering, to handle materials such as chemical salts, polymer powders, silica sand, industrial starches, metal concentrates, and fine clays.
Processing fine powders at high capacities presents unique industrial challenges, particularly regarding dust containment, uniform moisture distribution, and the prevention of thermal degradation or material clumping. This industrial rotary dryer is meticulously engineered to provide an optimized thermodynamic environment that rapidly evaporates moisture while preserving the physical and chemical properties of the powder, delivering a consistent, free-flowing, and ready-to-process final product.
Working Principle
The operation of the industrial powder rotary dryer is based on direct or indirect convective heat transfer combined with automated mechanical agitation:
Controlled Feeding and Conditioning: Moist powder is introduced into the drying drum via a variable-speed screw conveyor, rotary valve, or chute at the higher end of the inclined cylinder. The feeding interface is tightly sealed to maintain internal draft pressure and prevent material backtracking.
Lifting, Shuffling, and Curtain Formation: The interior of the rotating drum features a highly specialized layout of internal lifting flights, cross-shaped plates, or advanced shuffling flights. As the drum turns, these flights continuously lift the fine powder and cascade it down in a dense, uniform, and unbroken material curtain that spans the entire internal cross-section of the dryer.
High-Velocity Thermal Evaporation: A hot air furnace, steam heat exchanger, or gas burner supplies a continuous stream of thermal gas. Depending on the material's heat sensitivity, the system operates in a co-current arrangement (protecting heat-sensitive powders) or a counter-current arrangement (maximizing thermal stripping for high-temperature applications). The falling powder curtain maximizes contact with the heated air, achieving near-instantaneous moisture evaporation.
Centrifugal Separation and Fine Powder Collection: The dried powder is drawn or gravity-fed toward the lower discharge end. Because fine powders easily become airborne, the moisture-laden exhaust gas is pulled into a high-efficiency multi-stage collection network, comprising large-diameter cyclones and a heavy-duty pulse-jet baghouse filter, ensuring that 99.9 percent of the dried powder is cleanly recovered.
Product Features
Customizable Internal Flight Geometry for Powder Uniformity: Fine powders are prone to uneven drying if they aggregate. This dryer features a highly optimized internal architecture, mixing lifting, radial, and continuous flights to ensure the powder is uniformly agitated without dead zones, resulting in an exceptionally narrow and consistent final moisture profile.
Advanced Anti-Sticking and Dust-Suppression Systems: High-moisture powders can easily become sticky or form mud rings on the inner drum wall. The dryer is equipped with specialized non-stick internal linings, automated external pneumatic hammer rappers, or internal chain curtains that mechanically flex and clean the shell during operation, completely preventing material buildup.
Flexible Thermal Source and Indirect Heating Options: To process high-purity or highly combustible chemical and food powders that cannot come into contact with direct combustion gases, the plant can be configured as an indirect steam-tube or jacket-heated rotary dryer, keeping the heating medium completely isolated from the material.
Precise Automated PLC Process Control: Integrated with online moisture sensors and multi-point thermocouples at the inlet and outlet, a centralized PLC automation network continuously monitors the process. The system dynamically scales the burner output, drum rotation speed, and material feed rate to maintain the exact thermal window required, preventing over-drying or scorching.
Heavy-Duty Mechanical Build with High-Integrity Seals: Fine powders demand total dust containment. The kiln head and tail feature high-performance double-layered spring-loaded graphite or mechanical scale seals that keep the system under continuous negative pressure. The massive drum is fabricated from premium carbon or stainless steel steel, supported by forged alloy riding rings and self-aligning support rollers for smooth, non-stop 24/7 industrial service.
Technical Specifications
| Product Specs (m) | Capacity (T/H) | Main Motor Power (kW) | Main Motor Model | Main Gearbox Model | Ratio |
| φ1.2×10m | 2.5 | 7.5 | Y160M-R3 | ZL50-16-1 | - |
| φ1.5×12m | 3.3 - 4.9 | 10 | Y160L-6B3 | JZQ500-III-2F | - |
| φ1.5×15m | 4 - 6 | 18.5 | Y200L-6 | JZQ500-III-2F | - |
| φ1.8×12m | 4 - 6 | 11 | Y200L-6 | ZQ50-16II-2 | 16.46 |
| φ2.2×12m | 7 - 12 | 18.5 | Y160L-6 | JZQ650-III | 31.5 |
| φ2.2×14m | 7 - 12 | 18.5 | Y160L-6 | JZQ750-III | 31.5 |
| φ2.2×16m | 12 | 30 | Y225M-6 | JZQ750-III | 31.5 |
| φ2.4×14m | 12 | 30 | Y250M-6 | JZQ750-III | 31.5 |
| φ2.4×18m | 10 - 13 | 37 | Y250M-6 | ZL85-13-1 | 27.16 |
| φ2.4×20m | 10 - 14 | 37 | Y250M-6 | ZL85-13-1 | 27.16 |
| φ3×20m | 25 | 55 | Y250M-4 | ZL100-16-1 | 41.52 |
| φ3×25m | 32 - 36 | 75 | YR280M-4 | ZL100-16-1 | 41.52 |
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