The Application of the Drum Dryer in Cereal Flakes Production

Drum dryers are cutting-edge machines that stand out for their versatility in the food industry (and not only in the food industry). From their inception, these machines have evolved to meet an array of production needs, seamlessly integrating into various manufacturing processes while retaining their core functionality.
Drum dryers, furthermore, play a crucial role in the production of dry food, which is widely consumed by the population, especially in the West: cereal flakes. In this article, we’d like to explore the application of drum dryers in cereal flakes production.

Advantages of Using Drum Dryers in the Production of Cereal Flakes:
1. Distinctive Taste: The gentle drying process guaranteed by drum dryers preserves the natural taste of ingredients, ensuring a delicious and wholesome eating experience for infants.

2. Excellent "Porridge-Forming" Characteristics: The products dried using drum dryers exhibit exceptional solubility, swelling behavior, and water absorption properties. This facilitates the effortless preparation of smooth and creamy porridge, ideal for babies transitioning to solid foods.

3. Full Gelatinization: Drum drying technology guarantees that the product is fully gelatinized, ensuring optimal digestibility for babies and infants. This process breaks down starches into readily digestible forms, promoting easier assimilation and minimizing digestive discomfort.

4. Ideal for Baby Consumption: Drum-dried baby food possesses a unique mix of qualities and organoleptic properties, making it ideal for infant consumption. The gentle processing preserves nutritional integrity while ensuring safety and suitability for delicate digestive systems.

5. Nutritional Preservation: Drum dryers preserve the nutritional content of dry food by minimizing heat exposure and maintaining optimal processing conditions. This ensures that essential vitamins, minerals, and nutrients are retained, promoting healthy growth and development in infants.

6. Hygienic Processing: Drum drying technology offers hygienic processing conditions, minimizing the risk of contamination and ensuring the safety of baby food products. The closed-loop system prevents external contaminants from compromising product quality, meeting stringent food safety standards.

7. Consistent Quality: Drum dryers deliver consistent and uniform drying results, ensuring that every batch of dry food meets strict quality standards.

​8. Extended Shelf Life: The controlled drying process employed by drum dryers extends the shelf life of dry food products, reducing waste and ensuring product freshness over time.

Cereal Flakes Productive Process
As mentioned, drum dryers play a crucial role in the productive process of cereal flakes. We can break down the process into several steps.

Step 1: Cereals supply
The productive process of cereal flakes begins with silos or other types of containers that store raw ingredients.
Guided by meticulously crafted formulas, a precise combination of grains, flavorings, and additives, each in the required composition, is carefully weighed within dedicated weighing hoppers. Once they are accurately measured, they are transferred into a turbo mixer.

Step 2: Turbo Mixer
The turbo mixer combines the weighed ingredients with the appropriate amount of water to initiate the slurry preparation process. This stage is pivotal, as the quality of the final product depends on the thorough mixing achieved within the turbo mixer. The design of the mixer influences the uniformity and homogeneity of the slurry.

Step 3: Holding Tanks
Following the mixing process, the slurry is transferred to holding tanks. These are equipped with stirring units to facilitate the transition from batch-based mixing to continuous processing. The holding tanks play a crucial role in maintaining the consistency and temperature of the slurry as it progresses through the production line.

Step 4: Pre-Heating
At this stage, the slurry is pre-heated. The pre-cooking process can happen through a direct (Jet Cooker) or indirect (scraped surface heat exchanger) solution.
The pre-cooking process is essential for pasteurizing or sterilizing the slurry, ensuring a low bacterial count, and achieving optimal pre-gelatinization. It prepares the slurry for further processing in subsequent stages.

Step 5: Drum Dryer
The roller drum dryer stands as the cornerstone of the cereal flakes production line. At this stage, the slurry enters the drum dryer machine, where it is spread thinly and evenly onto the surface of a rotating drum.
The surface of the drum is heated, typically through steam or other mechanisms, so that moisture can evaporate from the thin layer of slurry and the desired moisture content can be obtained.
Then, a scraped blade removes the dry material from the surface, obtaining crisp cereal flakes.

Step 6: Mill Sifter 
After drying, the cereal flakes undergo milling and sifting processes to achieve the desired particle size and texture. The mill sifter removes any oversized or undersized particles, ensuring uniformity in the final product.

Step 7: Storage Silos
The storage silos provide temporary storage for the processed cereal flakes before they proceed to further processing or packaging. These silos help manage inventory and ensure a continuous supply of cereal flakes for packaging and distribution.

Step 8: Dry Mixer
In some production lines, a dry mixer may be utilized to blend additional ingredients or additives with the cereal flakes, such as sugar, cocoa, or other ingredients. This step allows for customization of the final product to meet specific consumer preferences or nutritional requirements.

Step 9: Package Machine
The package machine automates the packaging process, filling predetermined quantities of cereal flakes into packaging materials such as boxes, bags, or pouches. This step ensures efficient and hygienic packaging of the final product for distribution to consumers.

Step 10: Storage
Once packaged, the cereal flakes are stored in warehouse facilities before distribution to retailers or consumers. Proper storage conditions are maintained to preserve the quality and freshness of the cereal flakes until they reach their final destination.

Conclusion
In cereal flakes production, the roller drum dryer stands as a crucial element, highlighting the intersection of technological advancement and culinary refinement. Through this examination of its utility, the drum dryer has demonstrated its essential function in molding the manufacturing domain, embodying precision, dependability, and ingenuity. Its thanks to the application of drum dryers that cereal flakes can have the characteristics of flavor, versatility, and consistency that make them such a successful product worldwide.