Belt dryer ST-15

The ST-15 Belt Dryer is part of a production line for dry feed for livestock. Drying takes place within a temperature range from 60°C to 110°C, and the temperature of the product removed from the dryer does not exceed 40°C.
Model ST-15 is used for drying and cooling the product. Hot air flows through the product from bottom to top, effectively removing moisture, which is discharged by fans mounted on the top of the unit.

The ST-15 dryer can be part of a process line based on ESK series pet food extruders.

In the standard version, the dryer does not include a heat exchanger or a hot-air blower — these can be added upon customer request.

For hygiene, air heating inside the ST-15 pet food dryer is carried out by means of a heat exchanger, without contact with combustion gases.

Belt dryers are often used in production lines for manufacturing soy snacks, pet foods, fish feeds, and dried fruits. The drying temperature range is 60…110 °C, and the discharge product temperature does not exceed 40 °C.

ST-15×50 Belt Dryers are suitable for both drying and cooling products.
Cooling occurs via two processes:

• convective cooling – heat exchange between the product and the air,
• evaporative cooling – removal of moisture from the product.
  
  

The drying or cooling process takes place in a crossflow or countercurrent system, depending on the number of belts. During drying, warm air flows from bottom to top through the product on the belts, perpendicular to their direction of movement, which allows effective moisture removal that is then exhausted by fans. This process ensures gentle and uniform drying of the product.

Main objectives of drying:

• gentle and uniform moisture removal,
• prevention of crust formation or surface cracking,
• ensuring optimal moisture for long-term storage.

Belt dryers can be built in a modular system, which enables adjustment of the product processing time. The design takes into account: product type, quantity, temperature, initial moisture, required moisture removal, air condition, and heating method. The residence time depends on the belt length and the adjustable speed range of its drive. Polymer Teflon mesh ensures reliable product transport through the dryer. A drive with a gear motor and frequency control allows you to set the product layer height and its processing time.

Main advantages of the ST-15

• The dryer is equipped with five ventilation–exhaust systems for moisture removal and air recirculation.
  
• It has five levels of food-grade conveyor belt, 15 meters long and 500 mm wide.
  
• The angle of inclination can be adjusted for greater convenience.
  
• Service doors on the sides and ends facilitate operation and maintenance.
  
• The unit is driven by a 1.5 kW gearmotor.
  
• The dryer’s legs are adjustable, enabling stable positioning even on uneven surfaces.

Technical drawing:

Applications

The ST-15 Belt Dryer is a reliable device supporting the final stage of the production process of cat, dog, and fish feed, as well as cattle feed.

Thanks to a modern approach to hygiene, energy-efficient design, and the ability to adapt to specific production needs, ST-15 is an important component of a modern processing line.

Examples of belt dryer applications:

• feeds (pellets or extrusion),
• pet food,
• fish feed,
• biomass,
• pelleted beet pulp,
• chopped grass, alfalfa,
• various grains,
• hop cones,
• wood waste and shavings,
• sewage sludge pellets,
• gypsum pellets,
• coal products,
• charcoal and briquettes,
• activated carbon,
• recycled products,
  and more.

Technical parameters:

• Number of belts (levels): 5
• Total belt length: 15,000 mm
• Mesh belt width: 500 mm
• Belt type: Teflon
  
• Minimum mesh aperture: 2×2 mm
• Mesh belt speed: 10…50 mm/s
• Installed drive power: 1.5 kW
• Maximum heat generator power: 50 kW
• Fuel type: wood pellets
• Drying medium temperature: 60…110 ºС
• Product fraction: 3…25 mm
• Feedstock moisture: max 25%
• Product moisture: max 8%
• Dimensions (L×W×H): 3600×950×2200 mm
• Weight: 1000 kg