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Double Cone Vacuum Dryer

The double cone vacuum dryer is a high-efficiency horizontal type vacuum drying equipment that integrates drying, vacuum decompression, and mixed powder.
The Hywell Machinery lab model double cone vacuum dryer has a few advantages that make it suitable. the rota cone vacuum dryer (lab scale) is an extremely gentle dryer/mixer for minimal particle size degradation. The drying phase is by vacuum with a solvent recovery system to allow for the recovery of the solvents that were used to dissolve the active ingredients. The discharge from the vessel is from the bottom of the cone by a full port valve. It also allows for the entire batch to discharge quickly with minimal residual material left behind.
  • SZG


  • 8419399090

  • SUS304/SUS316L/Titanium

  • Food/Pharmaceutical/Chemical

  • Yes


Double Cone Vacuum Dryer Description

SZG Series Laboratory model double cone vacuum dryer is a new generation drying device developed by our factory on the basis of combining the technology of similar equipment. It has two connecting ways, i.e. belt or chain. Therefore laboratory rotary vacuum dryers are stable in operation. The special design guarantees two shafts 

realize good concentricity.the double cone vacuum dryer is also called rota cone vacuum dryer, roto cone vacuum dryer, rotary cone vacuum dryers.

As for the working medium, it mainly uses hot water for the double cone vacuum dryer. For drying the adhesive raw material, we have designed specially a stirring plate buffer for you. Let the heat source (for example, low-

pressure steam or thermal oil, or hot water) pass through the sealed jacket. The heat will be transmitted to raw material to be dried through the inner shell; Under the driving of power, the tank is rotated slowly and the raw material inside it is mixed continuously. The purpose of reinforced drying can be realized; The raw material is under vacuum. The drop in steam pressure makes the moisture (solvent) at the surface of raw material reach the state of saturation and evaporate. The solvent will be discharged through a vacuum pump and recovered in time. The inner moisture (solvent) of raw material will infiltrate, evaporate and discharge continuously. The three processes are carried out unceasingly and the purpose of drying can be realized within a short time. The smallest model of the lab double cone vacuum dryer may be 30L. but hywell machinery has the industrial rotary cone vacuum Dryer whose biggest volume reach 8000L.

Double cone vacuum dryer video

Explosion-proof Rota Cone Vacuum Dryer

Double Cone Vacuum Dryer Specifications


Total volume (L)

Operation Volume(L)

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1.Hywell machinery reserves the right to the design without notice

2.All specifications are as accurate as is reasonably possible, but they are not binding.

How Does a Double Cone Vacuum Dryer Work?

A double cone vacuum dryer is a specialized equipment designed to efficiently remove moisture or solvents from various materials through a low-pressure environment. This drying technique involves a carefully controlled process to prevent thermal degradation and preserve the product's quality.

The double cone vacuum dryer consists of two interconnected, cone-shaped vessels, which are mounted on a central axis. The vessel design allows for excellent mixing and uniform drying of the material. The main components include the drying chamber, drive mechanism, heating system, vacuum system, and discharge valve.

The drying process begins by loading the wet material into the drying chamber. Once sealed, a vacuum is created inside the chamber, lowering the pressure and boiling point of the liquid or solvent. The heating system then provides gentle heat to the vessel walls, transferring the thermal energy to the wet material. As the liquid or solvent vaporizes, it is quickly removed by the vacuum system, maintaining the low-pressure environment. The movement and rotation of the double cone vessels ensure even drying and prevent product accumulation or overheating.

Double Cone Vacuum Dryer Construction Material

Hywell machinery is able to offer a lab series rotary double cone vacuum dryer with contact parts to be built in ss304, ss316l, titanium, duplex stainless steel, etc. Electrical parts of the control system of the rotary vacuum drying machine can be adapted to the customer’s needs.

Applications of Double Cone Vacuum Dryers

The versatility and effectiveness of double cone vacuum dryers make them indispensable in various industries. Some notable applications include:

  1. Pharmaceutical Industry: Double cone vacuum dryer machine are widely used in pharmaceutical manufacturing for drying active pharmaceutical ingredients (APIs), excipients, and intermediates. They ensure the production of high-purity, stable, and free-flowing powders for tablet formulation, capsule filling, and other pharmaceutical processes.

  2. Chemical Industry: In the chemical sector, double cone vacuum drying machine are employed for drying chemicals, pigments, dyes, and catalysts. The controlled drying conditions prevent chemical reactions, degradation, or product loss, enabling the production of high-quality chemical compounds.

  3. Food Industry: Double cone vacuum dryers find application in the food industry for drying ingredients, flavors, and extracts. By gently removing moisture at low temperatures, they preserve the natural flavors, colors, and nutritional values of food products. This is particularly crucial in the production of sensitive food items like herbs, spices, and dehydrated fruits.

How Does Rotary Double Cone Vacuum Dryer Work

the lab rotary double-cone vacuum dryer is a double-cone rotary tank. When the tank is in a vacuum state, steam or hot water is passed into the jacket for heating, and the heat is in contact with the wet material through the inner wall of the tank. The vapor that evaporates after the wet material absorbs heat is evacuated by a vacuum pump through a vacuum exhaust pipe. Since the tank body is in a vacuum state, and the rotation of the tank body causes the materials to continuously turn up and down, inside and outside, the drying speed of the materials is accelerated, the drying efficiency is improved, and the purpose of uniform drying is achieved.

Advantages of Using a Double Cone Vacuum Dryer

Double-cone vacuum dryers offer several advantages over conventional drying methods. These benefits make them a preferred choice in many industries:

Improved Drying Efficiency and Reduced Drying Time

The low-pressure environment and efficient heat transfer mechanism enable faster drying times compared to other drying methods. The double-cone design enhances mixing and facilitates uniform drying, minimizing the need for extended drying cycles.

Preservation of Product Quality and Integrity

The gentle drying process of double-cone vacuum dryers helps maintain the integrity of heat-sensitive materials. By avoiding exposure to high temperatures, the risk of thermal degradation, discoloration, or loss of volatile components is significantly reduced. This ensures that the final product retains its desired properties and meets quality standards.

Reduction of Heat Exposure and Potential Thermal Degradation

Traditional drying methods often involve high temperatures, which can cause thermal degradation or undesirable chemical reactions in certain materials. Double cone vacuum dryers operate at lower temperatures, minimizing the risk of heat damage and preserving the product's chemical composition.

Enhanced Product Uniformity

 The unique design of rota-cone vacuum dryers promotes excellent mixing and uniform drying. This results in consistent moisture removal throughout the material, leading to a more homogeneous end product with improved characteristics such as particle size distribution and color.

Flexibility in Handling Various Materials

 Double cone vacuum dryers are versatile and can handle a wide range of materials, including powders, granules, and pastes. They are particularly suitable for heat-sensitive and delicate substances that require gentle drying conditions.

Controlled Process Parameters

The drying process in roto-cone vacuum dryers can be precisely controlled, allowing operators to adjust parameters such as temperature, vacuum level, and rotation speed. This level of control ensures optimal drying conditions for different materials and enables customization to meet specific product requirements.

Double Cone Vacuum Dryer Feature

Hywell Machinery lab series double cone vacuum dryer had the following feature over conventional solutions. Vacuum dryers offer many benefits including:

1. Dry temperature-sensitive products because all liquids vaporize at a lower temperature at reduced pressures, it is possible to vaporize the liquids at very low temperatures.

2. Reduced energy since the evaporation of the liquid under vacuum occurs at a much reduce temperature, the temperature differential is increased without raising the temperature.

3. Safe for friable products the low speed at which double-cone vacuum dryers operate, just a few revolutions per minute, makes rota-cone dryers ideal for delicate and friable solids such as crystals, macromolecules, or agglomerated solids.

4. More complete discharge unlike agitated dryers, rota-cone dryers have the very little surface area and no agitator to trap product. The simple unobstructed 45-degree cone allows all products to freely discharge.

5. Low cross-contamination because there is only one moving part, the tumble dryer is an inherently simple and clean design, which improves yield and reduces cross-contamination.

6. Easily inspected the interior

Factors to Consider When Choosing a Double Cone Vacuum Dryer

When selecting a double cone vacuum dryer for your specific needs, several key factors should be taken into account:

  1. Capacity and Size Requirements

    Assess the volume of material you need to dry per batch and ensure the chosen dryer has an adequate capacity. Consider the available space in your facility to accommodate the equipment.

  2. Material Compatibility

    Different materials have varying drying characteristics and requirements. Ensure that the construction materials of the dryer are compatible with the substances you intend to dry. For hygroscopic or corrosive materials, appropriate material selection is crucial to ensure durability and product safety.

  3. Energy Consumption

    Evaluate the energy efficiency of the double cone vacuum dryer. Look for features such as insulation, heat recovery systems, and advanced control mechanisms that can optimize energy usage and reduce operating costs.

  4. Ease of Cleaning and Maintenance

    Maintenance plays a vital role in the longevity and performance of the equipment. Consider the ease of cleaning, accessibility of components for inspection and maintenance, and availability of spare parts and technical support.

Maintenance and Cleaning of Double Cone Vacuum Dryers

To ensure optimal performance and longevity of double cone vacuum dryers, regular maintenance and proper cleaning procedures are essential. Here are some important considerations:

  1. Regular Inspection and Preventive Maintenance

    Schedule routine inspections to identify any signs of wear, damage, or malfunctioning components. This includes checking the heating system, vacuum system, seals, and discharge valve. Replace any worn-out or damaged parts promptly to prevent operational issues.

  2. Cleaning Procedures and Considerations

    After each drying cycle, thoroughly clean the drying chamber to remove any residue or product buildup. Follow the manufacturer's guidelines for cleaning agents and techniques suitable for the specific materials processed in the dryer. Pay attention to hygiene and sanitation requirements, especially in industries such as pharmaceuticals and food, to avoid cross-contamination.

  3. Lubrication and Calibration

    Lubricate moving parts as recommended by the manufacturer to ensure smooth operation and minimize friction. Additionally, regularly calibrate temperature and vacuum sensors to maintain accurate and reliable drying conditions.

  4. Training and Operator Knowledge

    Proper training should be provided to operators to ensure they understand the equipment's operation, safety protocols, and maintenance procedures. Well-informed operators can identify potential issues early on and take appropriate action to prevent downtime or accidents.


Double cone vacuum dryers are highly efficient and versatile equipment used for drying a wide range of materials in various industries. Their unique design, gentle drying process, and precise control over parameters offer significant advantages over traditional drying methods. From pharmaceuticals to chemicals and food processing, double cone vacuum dryers ensure improved drying efficiency, preservation of product quality, and reduced heat exposure.

To maximize the benefits of double cone vacuum dryers, it's crucial to consider factors such as capacity requirements, material compatibility, energy consumption, and maintenance needs when selecting the equipment. Additionally, implementing proper safety precautions, regular maintenance, and cleaning procedures are essential to ensure safe and efficient operation.

As technology continues to advance, future developments in control systems and IoT integration will further enhance the performance and capabilities of double cone vacuum dryers, leading to more efficient and precise drying processes.

So, whether you're a pharmaceutical manufacturer looking to preserve the potency of APIs or a food processing company aiming to retain the natural flavors of ingredients, investing in a double cone vacuum dryer can revolutionize your drying operations, optimize product quality, and boost overall efficiency.

FAQs (Frequently Asked Questions)

  1. What is the advantage of using a double cone vacuum dryer over other drying methods?

    Double cone vacuum dryer machine offer improved drying efficiency, preservation of product quality, reduced heat exposure, enhanced product uniformity, and flexibility in handling various materials.

  2. Which industries benefit from using double cone vacuum dryers?

    Rotary cone vacuum dryers find applications in industries such as pharmaceuticals, chemicals, and food processing. They are particularly beneficial in drying heat-sensitive materials and preserving the quality and characteristics of the final product.

  3. What factors should be considered when choosing a double cone vacuum dryer?

    Capacity and size requirements, material compatibility, energy consumption, and ease of cleaning and maintenance are important factors to consider when selecting a double cone vacuum dryer.

  4. How can I ensure the longevity and optimal performance of a double cone vacuum dryer?

    Regular maintenance, including inspection, cleaning, lubrication, and calibration, is crucial. Following the manufacturer's guidelines, training operators, and promptly addressing any issues or worn-out parts will help ensure optimal performance and longevity.

  5. Are there alternative drying methods to consider alongside double cone vacuum dryers?

    Yes, tray dryers, spray dryers, and rotary dryers are some common alternatives. However, each method has its own advantages and limitations, and the choice depends on specific drying requirements, material characteristics, and production volumes.

  6. What are the future developments in double cone vacuum dryers?

    Future developments include advancements in control systems for precise process control and the integration of IoT technology for real-time monitoring and remote control capabilities. These advancements aim to further optimize drying processes and increase efficiency.


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