Vacuum Screw Dryer

Improving drying efficiency by 50% with our patented technology!

Our patented hollow screw design takes drying to the next level—boosting efficiency and output like never before. Recover nearly all solvents and toxic gases safely while cutting energy costs. Perfect for chemical, pharmaceutical, and food industries, it’s the smarter, greener way to dry.

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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. It supports various materials,and various supporting auxiliary equipment can be provided to meet customer production needs. 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

1. Wide Applicability - Suitable For Drying Various Materials

Whether your materials are Liquids, Granules, Powders, or Slurries, or heat-sensitive, toxic, hazardous, or flammable—our vacuum screw dryer handles them all with ease. Its unique design makes it a versatile drying solution, meeting the needs of industries uses.

2. 50% Energy Savings - Significantly Lower Operating Costs

Traditional hot air dryers waste substantial heat, but our vacuum screw dryer operates in a vacuum environment, using efficient heat conduction to deliver energy directly to the material. This reduces energy consumption by up to 50%, saving you costs while maintaining outstanding drying performance.

3. 30%-50% Efficiency Boost - Time Is Money

Thanks to the hollow screw structure with its expansive heating surface, our dryer ensures even heat distribution and faster drying, boosting efficiency by 30%-50%. Whether it’s high-volume production or tight deadlines, you’ll deliver quicker and stay ahead of the competition.

4. Pollution 0 - Environmental Protection Is Our Mission

Operating in a vacuum environment, our hollow screw vacuum dryer eliminates air pollution. Emissions consist solely of recoverable solvents, which can be reclaimed via a condenser for zero discharge. It meets environmental standards while adding value through resource recovery.

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Why Choose Our Vacuum Screw Dryer

Efficiency and versatility

Compared with other vacuum dryers (such as vacuum rake dryer, vacuum paddle dryer, conical vacuum dryer, vacuum plate dryer, etc.), our vacuum spiral dryer has the following outstanding advantages:

- Thanks to its unique spiral structure and multi-surface heating (screw blades, spindle and inner wall), the heating area is greatly increased, which improves the drying efficiency by 30%-50%.

- Due to the spiral blade structure, the material is heated more evenly through continuous stirring movement, and the drying effect is better.

- Wider applicability, very suitable for various materials, especially high-value materials with strict drying requirements.

Unique design

Compared with vacuum rake and paddle dryers, the structural innovation is better.

Reduce energy waste and speed up processing.

Special imported material coating, can be used to dry high-viscosity materials.

Continuous vacuum drying, materials can be fed, dried, cooled and discharged at the same time, greatly saving time and improving drying efficiency.

Current research direction

Many vacuum dryers currently lack advanced automated control and real-time monitoring functions, so our company will focus on integrated sensors and automated systems to enable precise control of the drying process, such as changes in the moisture content of materials during drying, and fault warnings,etc.

Also,to improve drying efficiency again, we have begun to introduce auxiliary heating technologies such as microwaves and radio frequency to shorten drying time

Note: Although the initial equipment investment cost is high, in the long run, such as energy consumption and output, this is a worthwhile investment.

Want to know more about the difference between Vacuum Screw Dryer and other dryers?

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Specification Of Vacuum Screw Dryer

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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

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.

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.

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.

Accommodates a diverse array of material states such as powders, liquids, slurries,and granular forms.

ldeal for heat-sensitive materials that are susceptible to degradation at elevated temperatures.

Designed for processes necessitating solvent recovery and the control of toxic gasemissions.

Perfectly suited for materials that are oxidation-prone, or present flammable and explosive hazards.

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Vacuum Screw Dryer Case Studies

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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.