A:
All Dongding dryers come with a 12-month warranty covering parts and workmanship from the date of commissioning. Lifetime technical support and spare parts supply are provided.
Introduction of Scraper Drum Dryer
The drum scraper dryer adopts an indirect heating mode. By heating the rotating drum, it evaporates moisture from the viscous materials adhered to the drum surface.
The operating parameters of the drum scraper dryer—such as feed concentration, film thickness, and drum rotational speed—are adjustable to meet the specific requirements of different material properties. It is suitable for the dehydration of viscous and heat-sensitive materials in industries such as yeast, chemicals, dyes, pharmaceuticals, food, and metallurgy.
Advantages of Scraper Drum Dryer
01
Uniform Drying
Thin evenly spread material film with consistent heat and mass transfer; eliminates uneven drying, ensuring stable product quality.
02
Wide Operating Flexibility
Adaptable to various materials and output capacities. Automatic control enables simple operation, easy maintenance and real-time parameter monitoring for stable running.
03
Premium Drum Construction
Material-contact drum adopts high-grade cast iron with corrosion resistance and zero contamination; stainless steel is optional for diverse drying demands.
04
High Thermal Efficiency
Thermal efficiency reaches 80%–90%.
05
Short Drying Cycle
Forms 0.5–1.5 mm thin wet film; drying completed within 10–15 seconds, ideal for heat-sensitive materials.
06
Working Principle of Scraper Drum Dryer
The drum scraper dryer system can handle material as followed;
Brewery yeast,
humic acid, potassium humate, potassium fulvic acid, sodium fulvic acid,
Lignin, ammonium salt,
other sludge and sticky materials in food, chemical, pharmaceutical and other industries
Wet materials evenly cover the drum surface from the feeding inlet. the drum forms a material film upon contact with wet materials during rotation. The internally heated drum transfers heat through its wall by steam or thermal oil to evaporate water in the material film. During the rotation, dried materials are scraped off by the internal scrapers, then collected at the discharge outlet. The finished products are available in flake, powder or granular forms.
Specifications of Scraper Drum Dryer
| Model | JHD1500×2500 | JHD2000×2000 | JHD2000×2500 | JHD2000×3000 | JHD2000×3500 | JHD2500×3500 | JHD2500×4000 | JHD3000×4000 |
| Output Capacity（kg/h) | 40-55 | 50-65 | 60-80 | 70-100 | 90-120 | 100-150 | 120-180 | 150-250 |
| Drum size （mm） | Φ 1500×2500 | Φ 2000×2000 | Φ 2000×2500 | Φ 2000×3000 | Φ 2000×3500 | Φ 2500×3500 | Φ 2500×4000 | Φ 3000×2500 |
| Rotation speed （r/min） | 4-8 | 4-8 | 4-8 | 4-8 | 4-8 | 4-8 | 4-8 | 4-8 |
| Steam working pressure （Mpa） | 0.15-0.3 | 0.15-0.3 | 0.15-0.3 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.8 | 0.3-0.8 |
| Big pressure of steam （Mpa） | 0.3 | 0.3 | 0.3 | 0.4 | 0.5 | 0.5 | 0.8 | 0.8 |
| Steam consumption （kg/h） | 280-370 | 320-390 | 360-480 | 370-500 | 380-520 | 380-550 | 400-600 | 450-800 |
| Main motor power （kw） | 7.5 | 11 | 15 | 18.5 | 22 | 30 | 37 | 45 |
| Total weight （T) | 8.5 | 10.7 | 12.2 | 13.5 | 15.0 | 17.0 | 21.0 | 25.0 |
Notice:
1. Any change of technical data shall not be advised additionally.
2. Parameters above are for reference; final configuration is tailored to your material and capacity.
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- 600+
- Projects Worldwide
With drying projects running across the globe, Dongding has earned long-term trust through reliable quality and responsive after-sales service.
Frequently Asked Questions
Common questions about our rotary dryers — pricing, customization, installation and after-sales.
A:
Please share your raw material, initial and target moisture content, required capacity (t/h), available fuel or heat source, and your target market. With these details our engineers can recommend the right model and send an accurate quotation.
A:
As a manufacturer, we accept orders starting from a single machine. We can also deliver complete drying production lines with auxiliary equipment such as hot air furnaces and dust collectors. Contact us for tailored pricing.
A:
Standard models are usually delivered within 25-40 days after the deposit. Customized machines or larger production lines may take longer depending on the configuration. The exact schedule is confirmed in your contract.
A:
Yes. Every dryer is engineered around your material, capacity, moisture and site layout. Heat source, material of construction, dust collection and automation level can all be customized to your process.
A:
Yes. We provide installation guidance, commissioning, operator training and lifetime after-sales support. Our engineers can also travel to your site, and all equipment comes with a warranty.
