Plant with single point powder collection in container under cyclone.
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Two-point powder collection: Coarse powders from the drying chamber base and fine powders from the cyclone.
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PRODUCTION MINOR™ Spray Dryer
- Versatile Spray Dryer for in-house research and small scale production
- Interchangeable atomization and powder discharge systems
- Sanitary design
- Standard modules for a wide range of configurations
Rotary Atomizer
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Atomization is achieved by feeding liquid into a highspeed wheel. The rotary atomizer is placed in the ceiling air disperser and operates with a vaned atomizer wheel for non-abrasive feeds, and with a carbide bushing wheel for abrasive feeds. Other designs are available for special applications. Powders produced with this atomizer mode have a narrow particle size distribution with a mean size in the range of 20-50 μm.
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Two-fluid nozzle, co-current mode
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Atomization is achieved by using compressed air to atomize the liquid feed. The nozzle placed in the ceiling air disperser is ideal for heat sensitive feeds and has theadded advantage of handling both low and high viscosity feeds. Powders produced with the co-current two-fluid nozzle have a mean particle size in the range of 10-40 μm.
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Two-fluid nozzle, fountain mode
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The nozzle placed in the cone section of the drying chamber is spraying upwards countercurrent into hot air from the ceiling air disperser. The fountain mode has the advantage of spray drying high solids feeds, and producing free-flowing powders of a mean particle size in the range of 60-100 μm.
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- Feed pump
- Rotary atomizer, low weight: 17 kg
- Two-fluid nozzle, co-current
- Two-fluid nozzle, fountain mode
- Pre-filter
- Electrical heater, 40 kW
- Drying chamber 1200x745 mm, Cone angle 60º
- Cyclone CHE 300 mm
- Bag filter (alternative: wet scrubber)
- Exhaust fan
Parts in product contact in stainless steel AISI 316. Non contact parts: AISI 304. Internal surface: Cold rolled 2B. Welds polished to Ra 0.6. Other treatments on request. Noise attenuated fans.
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Co-current Mode
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Fountain Mode
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Co-current Mode |
Fountain Mode |
Space requirements LxWxH |
Plant including bag filter or wet scrubber: 4.4x2.0x2.7 m |
Plant without bag filter or wet scrubber: 3.5x1.5x2.7 m |
Available equipment
- Extended chamber cylinder ( 1200 x1500 mm).
- HEPA filters for inlet and/or exhaust air.
- Heaters: Electrical, steam or combustion gas.
- Bag filter. Various filter media according to requirements.
- Wet scrubber, compact design.
- Jet air wall sweep for internal chamber cooling/sweeping.
- Pneumatic hammers.
- Delivered with different control concepts.
- Pressure shock resistant design: 0.6 bar with integrated bursting membrane for special applications.
- Closed cycle design for operation with organic solvents.
- CIP systems.
- Customized designs accepted.
Relationship between water evaporative capacity and inlet air temperature:
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Rotary atomizer at 90°C exhaust air temperature |
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Co-current mode two-fluid nozzle at 90°C exhaust air temperature |
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Fountain mode two-fluid nozzle at 120°C exhaust air temperature |
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  Link to PRODUCTION MINOR™ Spray Dryer document (pdf)
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