Dryers
SETREM offers a wide range of dryers that meet the extrusion requirements: the type of product to be extruded and the quantity of water for evaporation
Dryers in the food industry are essential not only for the manufacturing process but also for ensuring that the final products meet expectations in terms of quality, safety, and shelf life.
Successful industrial process
Setrem offers a wide range of dryers that meet the extrusion requirements: the type of product to be extruded and the quantity of water for evaporation. Two technologies are proposed to match manufactured products and obtain the best possible energy efficiency : fluid-bed drying and counterflow drying.
Types of Dryers Used
Vibrated Fluid Bed Dryer
Ideal for specific products and/or small-sized and/or low-density products. A flow of hot air passes through the product layer, and the product is advanced by vibration. The vibrations allow for better particle circulation and a more homogeneous distribution of heat, thereby improving drying efficiency. This type of dryer is commonly used in the food, pharmaceutical, and chemical industries to process various sensitive materials.
Counterflow Dryer
The principle involves hot air passing through one or more layers of products, and it is available in single or multiple stages depending on the desired throughput. It is characterized by low energy consumption (between 0.8 and 0.9 kWh per kilogram of evaporated water). The air can be heated either with a gas burner or a steam heat exchanger.
Importance of Drying
Preservation and conservation
- Drying reduces water activity in food, inhibiting microbial growth and extending shelf life.
- It allows for more efficient storage and transportation.
Final product quality
- Precise moisture control is essential to maintain the texture, taste, and appearance of extruded food products.
- Inappropriate moisture levels can result in overly dry, brittle products or those with an unpleasant texture.
Manufacturing process
- Proper drying is crucial for the stability of the extrusion process. Raw materials that are too moist can cause blockages or inefficient extrusion.
- Moisture control is also important for the consistency of the final product, especially in the production of puffed or crispy foods, adhering to the target final moisture content.
Specific Considerations
Food Safety Regulations
Dryers must comply with food safety standards, including materials in contact with food, hygiene, and cleaning procedures.
Energy Efficiency
Dryers are often energy-intensive; hence, energy efficiency is a major concern, with innovations aimed at reducing energy consumption while maintaining drying efficiency.
Nutrient Preservation
Drying can affect heat-sensitive nutrients. Gentle or rapid drying technologies are often necessary to preserve the nutritional value of the foods.
Discover also
Extruders
Thanks to the flexibility of its extruders, SETREM has been able to follow and anticipate developments in the market by offering tailor-made systems to its customers.
Coater
Coaters are equipment used to apply a uniform layer of liquid or powder on extruded products.
System capacity table
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