Disc dryers, with their advantages of high efficiency, energy saving, and ease of operation, have become indispensable drying equipment in various industries. Through proper selection and configuration, disc dryers can effectively improve production efficiency, reduce energy consumption, and achieve both economic and environmental goals.
Advantages and Features
1、High Efficiency and Energy Saving: High thermal efficiency and low energy consumption, suitable for large-scale continuous production.
2、Small Footprint: Compact structure and small footprint, suitable for production environments with limited space.
3、Easy Operation: Simple configuration, convenient operation and control, and easy maintenance.
4、Environmentally Friendly: Good operating environment, no dust pollution, meeting environmental protection requirements.
5、Multifunctional: With different auxiliary equipment, it can perform various operations such as heating, cooling, calcination, sublimation, pyrolysis, and reaction.
Specifications and Models
Atmospheric Pressure Type: Suitable for conventional drying operations.
Sealed Type: Suitable for drying volatile, toxic, and harmful materials.
Vacuum Type: Suitable for drying heat-sensitive materials; can perform efficient drying at low temperatures. The drying area of disc dryers ranges from 4㎡ to 180㎡, with over 300 models to meet the needs of different users.
Structural Features
1、Drying Discs: The drying discs feature a hollow design, with heating media (such as saturated steam, hot water, thermal oil, hot air, and high-temperature molten salt) circulating inside. Drying discs are available in various sizes, with common diameters including φ1200, φ1500, φ2200, φ2500, φ3000, and φ4500. The drying discs are available in stainless steel, carbon steel, and a combination of carbon steel and stainless steel to suit the drying requirements of different materials.
2、Rake Arms and Rake Blades: The rake arms, equipped with rake blades, are mounted on the drying discs and rotate via a motor. The rake blades continuously agitate the material, ensuring uniform heating.
3、Feeder and Discharge Port: Wet material is continuously fed onto the drying discs at the top of the dryer via the feeder. The dried material falls from one layer of drying discs to the bottom of the shell and is finally discharged through the discharge port.
4、Auxiliary Equipment Equipped with finned heaters, solvent recovery condensers, bag filters, dry material remixing mechanisms, induced draft fans, and other auxiliary equipment, the drying capacity and operational flexibility can be improved. These auxiliary devices are helpful for handling special materials (such as pastes and heat-sensitive materials) and facilitate solvent recovery.
Working Principle
1、Material Flow Wet material is continuously fed from the feeder onto the small drying trays at the top of the dryer. The rake arm drives the rake blades in a rotary motion, continuously turning the material and causing it to flow along an exponential spiral path across the surface of the drying trays. The material falls from the outer edge of the upper small drying tray to the outer edge of the lower large drying tray, then moves inward and falls from the central discharge port into the next lower small drying tray. The large and small drying trays are arranged alternately, allowing the material to flow continuously throughout the dryer.
2、Heating Process A heating medium is introduced into the hollow drying tray, entering from one end and exiting from the other. The selection of the heating medium depends on the characteristics of the material and the drying requirements; common types include saturated steam, hot water, thermal oil, hot air, and high-temperature molten salt.
3、Moisture Discharge: Moisture overflows from the material and is discharged through the vent on the top cover. For vacuum disc dryers, moisture is discharged through the vacuum pump port on the top cover.
4、Dry Material Processing: The dried material falls from the first drying tray to the bottom of the shell and is moved by rake blades to the discharge port. The dry material can be directly packaged without further processing.