An eggshell dryer is specialized equipment designed to remove moisture from eggshells for further processing. The dryer must ensure uniform and economical drying, preventing bacterial growth and extending the eggshell’s shelf life.
After the egg white and yolk are extracted, what remains is the eggshell — a valuable byproduct rich in calcium and other minerals. It is used as fertilizer, a feed additive for poultry and livestock, a dietary supplement for humans, and in pharmaceuticals.
However, after the egg mass is separated, the eggshell still contains residual moisture, which begins to spoil quickly. Therefore, the shells are dried immediately after centrifugation.
Our Dryers for Eggshells
The vibrating eggshell dryer is considered the optimal solution, as it offers several advantages over other types.
However, for very high production capacities, we recommend a conveyor dryer, which is more economically viable than multiple vibrating dryers.
Vibrating Dryers in Eggshell Processing: Efficiency, Uniform Drying, and Cost-Effectiveness
Vibrating dryers play a crucial role in eggshell processing due to their high efficiency, uniform drying, and economic benefits. This type of equipment utilizes the “fluidized bed” technology, where eggshells remain suspended in a stream of hot air, undergoing intensive yet gentle drying.
1. Fast and Efficient Drying
Thanks to intensive contact with high-temperature hot air (200–250°C), the eggshell loses moisture within minutes, significantly reducing the production cycle time. High drying speed is particularly essential for processing plants with continuous raw material input. Additionally, this temperature completely eliminates pathogenic microorganisms, ensuring long-term eggshell storage.
2. Uniform Drying Without Overheating
The fluidized bed technology ensures an even distribution of heat throughout the product mass. Unlike drum dryers, where localized overheating may occur, vibrating dryers prevent shell scorching, preserving its structure and nutritional content.
3. Gentle Product Handling
Vibrating drying is less aggressive compared to drum and screw drying systems. This is particularly important when processing crushed eggshells, as it minimizes mechanical damage and the formation of fine dust particles.
4. Energy Efficiency and Cost Reduction
Vibrating dryers are energy-efficient due to their optimal heat distribution and reduced drying time.
The use of a hot air recirculation system further lowers fuel costs, making the process more economical compared to other drying technologies without such systems.
5. Compact Design and Easy Integration
Vibrating dryers take up less space than conveyor or drum systems and can be easily integrated into existing production lines. Their simple construction and automation minimize the need for operator involvement, reducing maintenance costs.
6. Robust Construction
Scolari has been manufacturing vibrating dryers for over 30 years, accumulating vast experience in drying various materials.
Scolari dryers are resistant to:
- Heavy materials (e.g., crushed stone)
- Abrasive materials (e.g., sand)
- Aggressive environments (e.g., salt and other chemical elements)
Therefore, drying eggshells is a simple task for these dryers.
The product remains in a semi-suspended state (“fluidized bed”), minimizing friction between the material and the dryer components.
7. Maintenance and Repair
Since the dryer has no major rotating mechanisms, maintenance is straightforward, primarily consisting of inspection and monitoring of key components.
The absence of wear-prone parts ensures long-lasting operation without costly repairs (as often required for drum dryers).
8. Easy Cleaning
The Scolari vibrating dryer is designed so that sticky egg residues do not obstruct the drying process. With a properly functioning centrifuge, the dryer typically requires washing only once every 1–3 months.
The cleaning process is simple, with water easily draining through inclined lower surfaces and special drain hatches.
9. Hygiene and Compliance with Food Industry Standards
Most vibrating dryers are made of stainless steel, ensuring compliance with food and pharmaceutical industry regulations.
Conclusion
Using a vibrating dryer for eggshell drying ensures high productivity, minimal energy consumption, and optimal product quality. These advantages make it one of the most efficient solutions for processing eggshells in food, feed, and pharmaceutical industries.
Clients and Global Reach of Scolari Eggshell Dryers
Thanks to their excellent performance and cost efficiency, Scolari dryers are integrated into egg processing lines by leading companies such as:
- ACTINI,
- PELBO/MOBA,
- SANOVO,
and others.
Some Scolari clients operate multiple eggshell dryers, installed over different years. For example, the well-known Italian producer EUROVO has 10 Scolari dryers, installed at different times since 2002. Nine out of ten are vibrating dryers, while one is a conveyor dryer, chosen due to the high production demands of the facility.
Scolari vibrating eggshell dryers are used worldwide, from Mexico and Argentina in the southwest to Japan and China in the northeast. Naturally, a significant number of these dryers are also found across Europe.
In reality, the geographic reach of Scolari vibrating dryers extends far beyond eggshell drying, as they are also supplied for other industrial, agricultural, and food processing applications.