Views: 34 Author: Site Editor Publish Time: 2024-07-24 Origin: Site
The hollow screw vacuum dryer and the conical screw vacuum dryer are both types of vacuum dryers designed to operate in a vacuum environment. By reducing the ambient pressure, these dryers lower the boiling point of moisture, allowing for low-temperature drying that is ideal for heat-sensitive materials. They both use thermal conduction as their heating method, which significantly reduces energy consumption compared to traditional hot air drying. Although both can be referred to as vacuum screw dryers, there are significant differences in design and efficiency between the two dryers.
Cone-shaped Design: As its name, the conical screw vacuum dryer has a single cone design.
Space-saving: The single cone design generally occupies less floor space, making it suitable for production environments with limited space.
Dead Zone Formation: The conical shape can lead to material accumulation at the bottom, creating dead zones that are difficult to dry and discharge completely, thus affecting drying efficiency.
Cleaning Challenges: Cleaning is relatively more challenging, especially for larger conical screw vacuum dryers , as the bottom and side walls are harder to access, particularly the back of the ribbon.
Horizontal Design: The hollow screw vacuum dryer features a horizontal layout, typically placed level to the ground.
Prevention of Dead Zones: Our proprietary W-shaped shell design effectively prevents material accumulation in dead zones.
Ease of Maintenance: Regardless of size, the horizontal structure and openable top cover make the equipment easy to inspect, clean, and maintain.
Structure: Equipped with a ribbon that pushes materials to flip up and down within the cone.
Structure: Utilizes spiral blades to move materials along the heating surface, with rakes to enhance mixing efficiency.
Enhanced Heating: In addition to the inner wall, the hollow design of the main shaft and spiral blades allows for the introduction of heat transfer media (such as hot water, heat transfer oil, or steam). This greatly increases the contact area between the material and the heating surface, significantly improving drying efficiency—an advantage not found in other dryers on the market.
Both the Conical Screw Vacuum Dryer and the Hollow Screw Vacuum Dryer can utilize automatic feeding systems or manual feeding.
Due to its conical design, this dryer relies solely on automatic discharging.
Offers greater operational flexibility compared to the single cone design. It can automatically discharge materials like the Single Cone Ribbon Dryer, but it also features an openable top cover. This design allows for manual discharging and cleaning, making it more convenient and adaptable for various operational needs.
The effective heat transfer area of the single cone design is 1.5 times that of the internal surface area, leading to high drying efficiency. However, its operation is limited to batch processing.
Compared to other vacuum dryers, including the Conical Screw Vacuum Dryer,our Hollow Screw Vacuum Dryer features a larger heating area,the inner wall, main shaft and spiral blades can be heated, so the drying efficiency is much higher than other dryers. This design ensures more uniform heat distribution to the materials, significantly increasing drying efficiency, achieving 3 to 5 times the efficiency of other drying equipment.
In addition to batch processing, our Hollow Screw Vacuum Dryer can also perform continuous operations, allowing simultaneous heating and cooling. This feature further enhances production efficiency and expands its range of applications.
Wide Application: Both types of equipment are suitable for drying a variety of materials, including powders, liquids, slurries, and particulate materials.
Industry Suitability: Our Hollow Screw Vacuum Dryer is widely used across various industries such as chemical, food, pharmaceutical, and pesticide sectors, meeting the diverse drying needs of different industries.
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