INDUSTRIAL THERMAL SOLUTIONS
AIR-SWEPT
TUBULAR DRYER
Rapid, Efficient Drying for High-Moisture Materials
The Air-Swept Tubular Dryer is a continuous flash-drying system engineered for difficult, high-moisture materials. Adjustable paddles, air dams, controlled airflow, and high heat transfer efficiently transform slurries, filter cakes, powders, and granules into a consistent, free-flowing product.
PERFORMANCE SPECIFICATIONS
5%
starting Dry Solids
CUSTOM
ENGINEERED SYSTEM
3
DRYING ZONES
CONTINUOUS
DRYING PERFORMANCE
Available for testing in the Scott test lab facility
WHAT IS AN AIR-SWEPT TUBULAR DRYER?
An Air-Swept Tubular Dryer, or AST Dryer, is a continuous drying system that uses heated air, high-speed agitation, and controlled material movement to remove moisture from wet materials.
Unlike a basic hot-air dryer, the AST also mixes and breaks apart material as it dries. This exposes more surface area to the heated air, helping difficult materials such as slurries, filter cakes, sticky solids, powders, and granules dry more efficiently.
Explore the diagram and the AST Dryer animation below to see how material moves through each stage of the drying process. Together, they provide a step-by-step look at the airflow, material flow, and engineered components that deliver fast, efficient, and consistent drying performance.
Controlled Drying
Precision control of airflow, material movement, and retention time for optimal drying performance.
Versatile Capability
Effectively dries a wide range of materials, from fine powders to sticky, high-moisture substances.
high efficiency
Maximizes heat transfer and evaporation for faster drying and reduced operating costs.
consistent results
Delivers a uniform, free-flowing product with reliable quality, batch after batch.
HOW DOES THE AST DRYER WORK?
Inlet and Flash zone
High-velocity air and fixed agitator blades break up wet material and expose more surface area to heat. Adjustable paddles keep wetter material moving until it becomes free-flowing.
RETENTION ZONE
Adjustable paddles and controlled airflow keep material in the dryer long enough to reach the required moisture level.
discharge zone
The final zone provides additional drying as it moves the finished product toward discharge.
WHAT IS INCLUDED IN AN AST DRYER SYSTEM?
GAS FIRED BURNER
Provides the heated process air needed for drying. Direct- or indirect-fired options can be configured around the application.
CONTROLLED FEEDING SYSTEM
Provides a steady flow of material into the dryer. Depending on the material, the system may use a Cake Feeder, Mixer Feeder, or pump.
AIR SWEPT TUBULAR DRYER
Mixes the material with heated air and controls its flow through three drying zones until it reaches the required moisture level.
PRODUCT COLLECTOR AND EXHAUST FAN
Separates dried material from the process air while the exhaust fan maintains airflow and negative pressure throughout the system.
BUILT AROUND YOUR DRYING PROCESS
Every AST Dryer is sized and configured around your material, incoming moisture, desired final moisture, capacity, temperature limitations, and facility requirements
MATERIALS IDEAL FOR AN AST DRYER
Slurries
Filter Cakes
Wood flour & sawdust
Clay & kaolin
Calcium carbonate
Magnesium hydroxide
Lime sludge
Catalysts & resins
Fine powders
Moist granules
Poultry manure
Industrial byproducts
Chemical materials
Plastics & polymers
Specialty minerals
Difficult-to-handle wet solids
TECHNICAL SPECIFICATIONS
| Dryer Type | Continuous air-swept flash dryer |
| Construction | Carbon Steel, 304 stainless steel, 316 stainless steel, or specialty alloys |
| Feed Material | Slurries, filter cakes, powders, granules, and sticky materials |
| Drying Zones | Inlet, retention, and discharge |
| Heat Source | Direct-fired or indirect -fired burner |
| Operating Temperature | Configured for the specific product and process |
| Material Control | Adjustable paddles and air dams |
| Feeding Options | Cake feeder, mixer feeder, positive-displacement pump, or centrifugal pump |
| Product Collection | Baghouse or application-specific collection system |
| Airlow | Centrifugal exhaust fan with damper or variable-frequency control |
| System Pressure | Negative-pressure operation |
| Controls | PLC-based system with temperature and process controls |
AST DRYER IMAGE GALLERY
AST DRYER FAQs
How does an AST Dryer work?
Wet material enters the dryer and is mixed with high-velocity heated air. Agitator blades and adjustable paddles break apart and move the material, while air dams help control retention time. Material moves through inlet, retention, and discharge zones until it reaches the required moisture level.
Can an AST Dryer handle slurries?
Yes. The AST Dryer is designed to process slurries and other high-moisture materials. Starting solids capability depends on the material and process.
Can the AST Dryer handle filter cake?
Yes. Filter cakes are a common AST application. Agitation helps break apart wet material while heated airflow removes moisture.
Does the AST Dryer break up lumps while drying?
Yes. Mechanical agitation helps break apart and deagglomerate material during drying, exposing more surface area to heated air.
Is the AST Dryer a batch or continuous dryer?
The AST is a continuous drying system. The system continuously feeds material into the dryer, processes it through the drying zones, and discharges it.
Can I test my material before purchasing an AST Dryer?
Yes. Material testing can help evaluate drying performance and provide useful data for equipment sizing and system design.
Put our experience to work for you
CONTACT US TODAY TO LEARN ABOUT AST DRYER OPTIONS
Get in Touch
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601 6th St NW
New Prague, MN
56071
info@scottequipment.com
Monday - Friday
8:00 am - 5:00 pm
US Central Time
1-800-264-9519
(952) 758-2591
OUR PRODUCTS
BUSINESS HOURS
Monday - Friday
8:00 am - 5:00 pm
US Central Time
Monday - Friday
8:00 am - 5:00 pm
US Central Time
FIND US
605 4th Ave NW
New Prague, MN
56071
info@scottequipment.com
1-800-394-2591
(952) 758-2591
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