The essential elements of the spray dryer: atomizer, air disperser, drying chamber, inlet and exhaust air handling are combined into a system that meets individual operational safety, environmental protection, and powder handling requirements. All spray drying systems can be provided with post-treatment equipment: fluid bed dryer/cooler, agglomerator, de-duster and convevor.
Aseptic Spray Drying System
Featuring sterile feed atomization and air filtering systems. These dryers are used where any form of powder contamination must be avoided. They are fabricated to special standards of finish and operate under a slight pressure. Fully automatic cleaning and sterilization systems are available. Plant layout is integrated with the laminar flow packing room.
Aseptic Spray Drying System
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Features to meet special design specifications
- Air dispersers for rotary and nozzle atomizer assemblies
- Pressure shock resistant drying chambers with venting or suppression for explosion protection
- Semi or fully automatic cleaning systems (CIP - Cleaning In Place)
- Components designed to international sanitary standards
- Conventional or computerized control systems
- Air/air or air/liquid/air waste heat recovery units
- Air-broom and air-sweep attachments for drying chamber
- Noise attenuation of components
- Weatherproof finish for outdoor installations
- Rotary atomizers with inert gas purging
- Semi- or fully automatic solvent cleaning systems
- Gas tight: package plant test erected prior to shipment
- Available with cyclones or bag filters
- Condenser systems to ÷30° Return to top.
Open Spray Drying Systems
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Featuring once-through airflow with exhaust to atmosphere. The majority of industrial spray drying systems handle aqueous feedstocks and use this system. Both direct and indirect air heating are applicable. Exhaust air cleaning in cyclones, bag filters, electrostatic precipitators, and scrubbers.
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Closed Spray Drying Systems
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Featuring drying in an inert gas atmosphere where nitrogen recycles within the dryer. This system must be used for the spray drying of feedstocks containing organic solvents or where the product must not contact oxygen during drying. Closed cycle plants are gas and powder tight, and are designed to the strictest safety standards. The inflammable solvent vapours are fully recovered in liquid form.
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Semi-Closed Spray Drying System
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Featuring either the partial recycle mode (recycle of up to 60% of the exhaust air as inlet air to the dryer, for effective waste heat utilization) or the self-inertizing mode, where direct air heating and a minimal air bleed create the low oxygen atmosphere necessary for drying aqueous feedstocks that form explosive powder-air mixtures. If odour is generated during drying, the small volumes of air vented from the system can be effectively and economically incinerated.
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Inquiries outside North America and more information on Spray Drying Technology
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