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Particle Drying Services
Particle Drying Services
||Featuring contract and continuous manufacturing particle drying services, in addition to research development, toll processing, and consulting, AVEKA offers four machines and three distinct particle drying methods: fluid bed drying, roll drying, and tray drying. Fluid bed drying is a process by which particles, typically greater than 50 microns, are fluidized by air passing through a dispenser plate. Drying temperatures can range from room temperature up to 100 degrees Celsius, and this process is typically used when a flowable powder is desired.
Roll drying, also known as drum drying, is a particle drying process wherein a paste, slurry, or solution is applied to the outside of heated rolls. At AVEKA, we apply the incoming mixture to the outside of counter rotating drums: the amount of time and temperature of the rolls ultimately determines the moisture content of the final product, which is scraped off the rolls in sheet form or flakes using a precision knife scraper. These sheets can then be milled or ground to a powder, as needed. AVEKA handles food grade products, and is capable of up to 700 pounds of water evaporation per hour. Highly viscous products, such as honey, are well-suited to roll drying.
Tray drying is typically used for specialty applications that require special handling, high yields, curing steps, or other special considerations. AVEKA features multiple ovens and is pleased to handle both large and small batches.
To learn more about our particle drying methods and how we can help you, please contact AVEKA today.
Particle Drying Specifications:
Research And Development
Innovation and IP Development
||ISO - 9001 - 2008
International Organization for Standardization
||Fluid Bed Drying
Fluid Bed Drying is a method by which air passes through a disperser plate which causes a bed of particles to fluidize. Typically particles greater than 50 microns can be fluidized. Drying temperatures typically range from room temperature to 100 degrees C. Fluid bed drying is often used when a flowable powder is desired while minimizing agglomeration. AVEKA Inc. has lab and pilot scale fluid bed dryers available for food and general purpose processing. The AVEKA Manufacturing facility has two production Glatt 120 fluid bed dryers for industrial and personal care materials.
- Vector FLM-1 lab scale fluid bed
- Fitzpatrick fluid bed
- Glatt 120 fluid bed (2)
- Witte continuous fluid bed (ready for installation)
Roll Drying, also known as drum drying, is a method of particle drying by which a paste, slurry, or solution is applied to the outside of heated rolls. The system can utilize either a single or double drum configuration. In the case of a double drum dryer, which is what is used at AVEKA, the incoming mixture is applied to the outside of counter rotating drums. The residence time and temperature of the rolls determines the % moisture of the final product. The product is removed from the rolls in the form of sheets or flakes using a precision knife scraper. The final product can be milled or ground to a powder using a hammer mill or cone mill.
Traditionally items that are difficult to spray dry are processed on a roll dryer. Materials such as honey, molasses, high viscous products, and materials that require Maillard reactions are well suited for roll drying. Roll drying can also be used for producing instant starches.
The AVEKA Group currently utilizes a roll dryer at the Cresco Food Technologies plant for processing food grade products. The system is rated for 700 lbs per hour of water evaporation.
Tray drying is a drying technique which is typically used for specialty applications which require special handling, high yields, curing steps or other special considerations. The AVEKA Group has multiple ovens available for handling both small and large volumes.
• AVEKA, Inc. (the Woodbury, Minnesota R&D and small to medium scale production facility) is equipped with a number of spray dryers that have 0.5 to 200 pounds of water evaporation capacity per hour. The batch size for the smallest dryers is typically 1-5 gallons of liquid, scaling up in the other dryers to about 2500 gallons of liquid. These dryers typically produce particles with sizes ranging from 5-50 microns. One of the small dryers is located in the food processing suite and can produce food-grade samples for customers.
• AVEKA Manufacturing (the large-scale manufacturing facility in Fredericksburg, Iowa) is equipped with a Rogers Box Dryer with 3,200 pounds/hour of water drying capacity. Typical particle sizes range from 75-100 microns.
• Cresco Food Technologies (the large-scale food ingredient
manufacturing facility in Cresco, Iowa) also has a Rogers Box Dryer for food processing that dries 4,500 pounds of water/hour. This system is ideal for drying food-grade materials including maltodextrin, yeast, soy milk, and food chemicals.
• AVEKA Nutra Processing (the large -scale food ingredient manufacturing facility in Waukon, Iowa) has two Tower Spray Drying systems with rates of 800-1200 lbs and 3000-4500 lbs of water evaporation. The system is ideal for unique materials that need additional liquid processing and separation using decanter/centrifuges and/or MF/UF/NF/RO Filtration.
Horiba LA 950, LA 930 and LB 500, for measuring particle size distributions
Moisture Balance, Mettler LJ16 solids analyzer, TGA/DSC, and Karl Fischer for residual moisture measurements
Learn more about out Characterization Capabilities
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