Vacuum Screw Dryer

The vacuum screw dryer is a patented product developed independently by our company. Compared to traditional drying equipment, our hollow screw vacuum dryer significantly enhances production efficiency and capacity. Moreover, it allows for the recovery of nearly all solvents and toxic gases emitted during the process, ensuring safety, environmental protection, and energy conservation. Vacuum screw dryer is commonly used in industries such as chemical engineering, pharmaceuticals, and food processing.

Description Of Vacuum Screw Dryer

The main components of the hollow spiral vacuum batch dryer include: main shaft (hollow)spiral blades (hollow), wall (semi-pipe type) and other parts; the shell is w-shaped, withmultiple hollow spiral shafts arranged inside the shell; The body has a sealed and openableupper cover and is equipped with a filter and dust removal device to prevent material dustfrom leaking out. Different materials can be selected according to material requirements,and various supporting auxiliary equipment can be provided to meet customer productionneeds. According to the material temperature requirements, different media can be used forheating: such as hot water, steam, thermal oil, etc.

Advantage Of Vacuum Screw Dryer

Energy Efficiency

 
Utilizing indirect heat transfer, our vacuum spiral dryer system ensures maximum energy absorption by the materials being processed.

High Efficiency

 
With its large conduction area, materials are continuously mixed in the box, rendering it 3-5 times more efficient than traditional vacuum rake dryers.

Eco-Friendly Design

 
Operating under vacuum conditions, our vacuum spiral dryer system eliminates air-borne emissions. All vaporized solvents are recoverable via a heat exchanger, enabling zero-emission operation.

Cost Reduction

 
Engineered to provide a substantial heat transfer surface within a compact effective volume, our vacuum spiral dryer's minimized footprint significantly reduces both construction costs and spatial requirements.

Why Choose Our Vacuum Screw Dryer

Compared to other vacuum drying equipment like rake dryers or paddle dryers, the vacuum spiral dryer offers significantly higher drying efficiency and broader applicability. Its unique spiral structure and vacuum environment ensure uniform heating of materials during drying, reducing heat loss and drying time. Additionally, the spiral blades, main shaft, and inner drying wall can all be heated, greatly enhancing drying efficiency, typically 3-5 times more efficient than other vacuum dryers.
 
Our focus in research and development has always been on enhancing efficiency, environmental protection, and sustainable development in the drying industry, while also adapting to the demands of emerging markets.
 
Compared to conventional vacuum rake dryers, vacuum paddle dryers, and vacuum tray dryers, the vacuum hollow spiral dryer surpasses them in both structural design and operational efficiency. Its design offers significant advantages over other types of vacuum dryers. However, one drawback is that its price is considerably higher compared to other vacuum dryers. Therefore, it is best suited for materials that have high value and stringent drying requirements, where the investment in quality drying equipment is justified.
 
Our vacuum hollow spiral dryer is currently being continuously upgraded and improved to meet the increasing demands of our customers. Looking ahead, with advancements in automation and process control technology, we are confident that the vacuum hollow spiral dryer will undergo significant transformations. These advancements will enable seamless integration into Industry 4.0 initiatives, bringing about more efficient and intelligent solutions for the manufacturing sector. With the combination of precision engineering and advanced functionality, this pioneering drying technology will continue to lead the global industrial manufacturing industry forward, laying a solid foundation for future innovations and achievements.

Specification Of Vacuum Screw Dryer

Working Principle Of Vacuum Screw Dryer

Batch Drying
The drying process of the hollow screw vacuum batch dryer is to place the materials to be dried in a sealed drying chamber, using the shaft and blades to stir the materials and flow them, while using the vacuum system to evacuate, the materials are heated through the shaft, blades and the inner wall, so that the moisture inside the material is pumped away by the vacuum pump in a negative pressure environment. During the vacuum drying process, due to the low pressure state, the number of gas molecules is small, the density is low, and the oxygen content is low, so it can dry materials that are easily oxidized and deteriorate, and flammable and explosive dangerous goods, it can play a certain role in disinfection and sterilization of medicines, food and biological products, and can reduce the chance of material contamination or inhibit the growth of certain bacteria.
Continous Drying
The hollow screw vacuum continuous dryer consists of multiple chambers connected in parallel,each chamber can independently control the temperature and flow rate of the material, and can be converted to heating or cooling as needed.The hollow screw vacuum continuous dryer realizes continuous feeding and discharging under vacuum state, breaking through the technical problem of continuous feeding and discharging under vacuum state.The feeding amount can be freely set as needed, so that batch drying can be successfully transformed into dynamic continuous drying. while greatly increasing the output of dry products,also comprehemnsively production costs reducing.

Auxiliary Equipment

In addition to the main body of the vacuum screw dryer, a complete drying system requires a series of auxiliary equipment.The synergistic operation of these auxiliary devices is essential to ensure the proper functioning and efficient drying of the vacuum screw dryer.

Vacuum Pump

Water-ring vacuum pump or screw type vacuum pump

The vacuum pump which maintains the vacuum environment inside the drying chamber to ensure thorough evaporation of moisture from the materials and its removal.

Condenser

The condenser is used to condense the evaporated moisture from the materials into liquid form for subsequent processing and recycling.

Chiller

A chiller (or groundwater, cooling tower) is needed to provide a source of cooling water to maintain the proper operation and cooling effect of the condenser.

Temperature Controller

Heating media electric or gas

The temperature controller is utilized to regulate the temperature during the drying process, ensuring that the materials are dried under optimal temperature conditions for the best drying results.

Application Of Vacuum Screw Dryer

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In the food and beverage industry, vacuum hollow screw dryers play a vital role in drying sensitive products such as milk powder, instant coffee and fruit and vegetable powder (such as dragon fruit powder, coconut powder, pumpkin powder, red date powder, etc.). Its gentle drying process retains the nutritional content and flavor of the food and meets the strict quality standards of the consumer.
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The vacuum hollow screw dryer finds applications in chemical processing, where it is employed for drying catalysts, pigments, and specialty chemicals. Its ability to operate under controlled conditions ensures the purity and stability of chemical compounds, contributing to the success of diverse manufacturing processes.
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In the pharmaceutical sector, the vacuum screw dryer is utilized for drying active pharmaceutical ingredients (APIs), herbal extracts, and granules, ensuring the integrity and efficacy of pharmaceutical formulations.

Related Accessories & Support Equipment

Filter Bag
Baking Tray
Heat Exchanger
Rotary Valve

Vacuum Screw Dryer Case Studies

vacuum screw dryer
vacuum screw dryer
vacuum screw dryer
vacuum screw dryer

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Vacuum Screw Dryer FAQ

  • What are the key points to consider when buying a vacuum screw dryer?

    When buying a vacuum screw dryer, the key factors to consider are vacuuming and drying time, condenser efficiency, pumping volume, etc. In addition, the composition of the moisture to be extracted is also a very important factor because it affects the operating pressure.
  • How to choose the right vacuum screw dryer?

    Choosing the appropriate vacuum screw dryer involves considering factors such as material properties, drying requirements, and production capacity. It is recommended to collaborate with professional drying equipment manufacturers for customized selection to ensure optimal drying performance and production efficiency.
     
  • What is the price range of the vacuum screw dryer?

    The price of a vacuum spiral dryer is generally higher than that of other types of drying equipment due to its complex structure and high drying performance. However, considering its efficiency and quality drying results, investing in a vacuum spiral dryer typically provides excellent value for money.
  • What materials are suitable for the vacuum spiral dryer?

    The vacuum screw dryer is suitable for drying various materials, excluding highly viscous substances. It can handle powders, granules, flakes, liquids, and more. Common applications span across industries such as chemicals, food, pharmaceuticals, and metallurgy.

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