Features of Double Drum Dryer
The fanqun double-drum dryer can remove over 80% of the biological moisture content in one drying process.
- The vacuum double-drum dryer can preserve the structure, flavour and nutritional value of the product.
- There is a clear boundary between the mechanical area and the process area, which is clean and hygienic.
- Equipped with the Metris addIQ control system, it is easy to operate.
- It adopts high-speed air fuel (HVAF) coating, which is wear-resistant and durable.
- Multiple air lock configurations can achieve continuous drying.
GFQ-GDG-ST Double Drum Dryer
GDG Series drum dryer is a modern dryer, and it is an advanced technology that brought in Germany. It is widely used for drying sticky, colloidal, paste-like material, and it is adopted in foodstuff industry, chemical industry and pharmaceutical industry and so on The quality of dryer is good and stable.
Principle of GFQ-GDG-ST Double Drum Dryer
Liquid or muddy materials are dried by steam or other heating way, then the material is formed a pellicola After the drum run a circle, the material can be dried. And then the materials are taken out by scraper. So the machine can circle drying the material.
Features of GFQ-GDG-ST Double Drum Dryer
- The heat source is steam or heat conducting oil, the heating area is large, the heat efficiency is high and the heating is even.
- Drying efficiency is high and the direction of mass and heat transfer is the same. The difference in temperature is large and so the evaporating temperature of materials is very high
- The drying time is short, it is about 10~15s and it is suitable for heat sensitive materials.
- Operation is sample and maintaining is convenient.
Structure of GFQ-GDG-ST Double Drum Dryer
GDG Series drum dryer is made up of main drum, bracket, feeding device(feeding on the top or on the bottom), drive device crew feeding device, dusting device, scraper and so on.
Large application with oil and electric heating, Easy to operate auto multifunctional features Rust-free stainless steel with great dent endurance.
Dual and large vacuum drying equipment that uses steam heating, Explosion-proof and scratch resistant.
Stainless steel exterior and enhanced production stability, energy-saving and wide application for organic matter.
Dual cylinder rotary drum and large capacity, Various heating methods for continuous usage. Easy to operate with temperature control.
Great drying performance with wide application for chemicals and plastic processing.
Gas heating method and vacuum dryer equipment, has a rotating function that excels in fully drying in granulation.
The automatic rotary dual drum got efficient use and more energy saving application.
A food drying dual cone with multifunctional control and temperature adjustment, Heat dissipation and Multiple remote management.
- Our Factory
- Technical Parameters
| Model | Φ800×1600 | Φ1000×2000 | Φ1200×1200 | Φ1400×2400 | Φ1600×2400 | Φ2000×3000 |
| Compressure(MPa) | ≤0.6 | |||||
| Power(kw) | 3 | 2 | 2 | 5.5 | 7.5 | 15 |
| Heating area (m²) | 4 | 6.2 | 7.5 | 10.5 | 12 | 18.8 |
| Rotating revolution(r/min) | 0.5~10 | 0.5~8 | 0.5~5 | 0.5~5 | 0.5~5 | 0.5~3 |
| Heating medium | Steam or heat conducting oil | |||||
| Feeding way | Top or bottom | |||||
Note: Single drum or double drum or larger spec can be made according to clients’ capacity.
What Is a Double Drum Dryer
If you are looking for a reliable drying device for biological solids, the double-drum dryer is worth paying more attention to. It belongs to a type of contact drum dryer, with its core being two parallel rotating drums.
When in operation, your materials will be evenly spread in the narrow gap between the two cylinders. The cylinder is filled with a hot medium. Heat seeps in slowly through the cylinder wall, and with the light pressure brought by the rotation of the cylinder, the water is squeezed out.
The double-drum dryer is a continuous indirect dryer. Materials enter from one end, and dry materials exit from the other end without the need to shut down the furnace. It can gently remove water while preserving the original properties of the material, making it a practical choice.
How does A Double Drum Dryer Work?
Let’s get straight to the point and discuss its working mode in several key aspects, hoping to help you determine if it meets your production needs.
Step 1 – Heating
Heat the drum with steam. The temperature will be steadily controlled at around 300 degrees Fahrenheit, which is between 120 and 190 degrees Celsius when converted to the commonly used Celsius. This heat is just right, capable of efficiently squeezing out the moisture from the materials without damaging their inherent properties.
Step 2 – Material Contact Drum
The drum, carrying the material, rotates slowly, approximately three-quarters of a turn. This distance is sufficient for a large amount of moisture on the surface of the material to evaporate.
Step 3 – Evaporation
The high temperature on the surface of the drum and the high pressure between the two drums will cause the water in the material to turn into steam and escape. There is not much moisture left, and the material has become relatively dry, forming a thin layer of dryness.
Step 4 – Finished Product
When the drum rotates to a specific position, it will hit a fixed scraper. With a gentle scrape of a scraper, the dry material layer is completely peeled off. Turn it into the sheet or powder form you want and just drop it directly into the collection device.
Additional capacity for an easy, gentle, and hygienic drying with ANDRITZ double drum dryer
What Are The Benefits of Using A Drum Dryer?
Good Product Quality
When you choose a double-drum dryer, the first thing you will feel is its precise shaping ability for the product form. The material is evenly coated in a thin layer on the outer surface of the drum, avoiding the agglomeration or uneven shape caused by accumulation in traditional drying.
This film-type drying process ensures that your product particles are plump, the surface is smooth, and the appearance far exceeds that produced by conventional drying equipment.
Convenient Product Transportation
After dehydration, the volume of the product shrinks, and its density decreases, allowing you to significantly save on warehousing and logistics costs during transportation. Whether it’s food ingredients or chemical particles, you can obtain products with excellent consistency, enhancing the trust of downstream customers in your brand.
High Thermal Efficiency
The steam consumption can be as low as only 1.4 kilograms per kilogram of evaporated water, which is much lower than that of similar equipment. Its unique drum structure and heat exchange path reduce heat loss.
Energy Conservation
Meanwhile, our double-drum dryer can be optionally equipped with an energy recovery system to reuse the waste heat for the second time. In the long run, it can save you a considerable amount of electricity and steam fees. Especially in large-scale production, energy-saving advantages will be transformed into real profit margins.
Ultra-long Stable Operation
As the core equipment of the production line, stability is what you care about the most. The double-drum dryer is made of high-strength materials and processed precisely. Key components have undergone special reinforcement treatment, enabling them to withstand continuous operation for 24 hours.
Long Service Life
The mechanical transmission part has been optimised in design, significantly reducing wear. The surface of the drum is coated with high-speed air-fuel (HVAF) technology to form a dense and wear-resistant layer. Under normal use, the equipment can last for several decades, allowing you to focus on production without frequent replacements.
Clean Production
If you are in industries with extremely high hygiene requirements, such as food and medicine, the design of this device will give you peace of mind. It fully complies with the highest hygiene standards. The surface of the drum is smooth without dead corners, and the risk of material residue is extremely low.
It complies with both EHEDG (European Sanitary Engineering Design Group) and HACCP (Hazard Analysis and Critical Control Points) standards, eliminating hygiene risks structurally. There is almost no dust overflow during the drying process, and the workshop environment remains clean at all times.
Flexibly Adapt to Diverse Scenarios
Your production demands may be adjusted according to market changes, and the double-drum dryer has prepared a wide variety of versions for this purpose. Whether it is for handling heat-sensitive materials, high-viscosity slurries, or special components that require vacuum drying, there are corresponding models available for selection.
From small-scale test lines to large-scale industrial production, the equipment size, roller speed and heating method can all be customised. You don’t need to compromise on compatibility. One set of equipment can cover the needs of multiple products, reducing the additional investment in production line renovation.
Exclusive Protection Solutions for Heat-sensitive Products
For heat-sensitive components such as vitamins and enzyme preparations, high-temperature drying can easily lead to their failure. The vacuum double-drum dryer can solve this problem. It can not only quickly remove moisture but also retain the product’s activity to the greatest extent.
You will find that substances that were originally prone to denaturation at high temperatures will have a complete structure and stable efficacy after this treatment. Moreover, it can return to its original state when exposed to water, making it particularly suitable for the production of pharmaceutical intermediates and high-end food additives.
Fully Retain The Core Value of The Product
The low-temperature film drying mode of the double-drum dryer can precisely control the dehydration rate and prevent damage to the product structure caused by high temperatures.
Whether it is the natural flavour and nutritional components of food or the molecular characteristics of chemical products, they can all be completely preserved. Compared with traditional high-temperature drying, you will clearly notice that the finished product has a more natural colour and a more intense aroma. Especially for products like tea and spices, the value increase is obvious to the naked eye.
Ultimate Wear-Resistant Coating
The drum surface of the fanqun double-drum dryer adopts HVAF high-speed air fuel coating technology, forming a dense and uniform alloy layer. This coating not only has extremely high hardness but also can resist the erosion of abrasive materials such as quartz sand. It also has excellent acid resistance and can handle the drying of acidic waste.
Meanwhile, the coating meets food-grade safety standards. Even if it comes into contact with food raw materials, there is no need to worry about contamination, allowing you to use it with confidence in high-demand scenarios.
Intelligent Control
Modern production cannot do without intelligent management. The double-drum dryer is equipped with the Metris addIQ control system, allowing you to easily control the overall situation. The touch screen displays parameters such as temperature, rotational speed and energy consumption in real time.
Low Operating Costs
The double-drum dryer not only has low energy consumption but also requires much lower maintenance frequency than traditional equipment: the service life of vulnerable parts such as seals and bearings is long, and the annual maintenance cost is saved by more than 30%.
Application Fields of Double-Drum Dryers
- Food:
Dairy products
baby food or breakfast cereal
Fruit and vegetable puree
mashed potatoes
Cooked starch
waste yeast
- Pharmaceuticals and medical care:
highly active drug ingredients such as HPAPi
Vitamin
Protein extract
Nutritional health products
- Fine chemicals:
Some fine chemicals
Double-Drum Dryer vs. Single-Drum Dryer
Working Principle
The single-drum dryer forms a film of material on the surface of a heating drum and evaporates moisture through heat conduction. It is equipped with multiple coating rollers, allowing fresh materials to be dried layer by layer, eliminating voids, and ultimately producing high-density, low-dust thin sheets.
The double-drum dryer works in coordination with two parallel drums. Materials are filled in the gap between the two rollers and heated simultaneously, completing double-sided dehydration at the same time.
Comparison of Advantages And Disadvantages
The Advantages And Disadvantages of Single-Drum Dryers
- Advantages: The advantage of single-drum dryers lies in their ability to handle highly viscous materials such as pastes and concentrated liquids. It can precisely control the coating thickness, resulting in uniform density of the finished product and less dust.
- Disadvantages: However, its complex structure leads to high maintenance costs, time-consuming and laborious replacement of parts, and it is only suitable for a single type of sticky product.
The Advantages And Disadvantages of Double-Drum Dryers
- Advantages: The double drum excels in flexibility and efficiency. It can dry hundreds of liquids or pastes of different viscosities and densities, ranging from food to chemicals. Greater output and more energy-efficient.
- Disadvantages: It is not suitable for liquids with poor fluidity and is prone to clogging in the gaps of the drum.
Suggested Applicable Scenarios
If you mainly produce high-viscosity products (such as sauces and ointments) and pursue the ultimate bulk density and low dust, a single-drum dryer is a safe choice. Especially when you need small-batch fine processing, its multi-layer drying feature is very practical.
However, if you are dealing with multi-category switching (such as processing starch, dyes, and environmental protection agents simultaneously) or need large-scale continuous production, double drums would be more economical. Its wide adaptability enables you to handle multiple raw materials on a single line, and in the long run, the maintenance cost is lower. Be sure to avoid materials containing large particles to prevent roller jamming.
