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Niro Inc.
MOBILE MINOR™Spray Dryer
• New generation of laboratory spray dryers
• Choice of three atomizer systems
• Dries both aqueous andsolvent feedstocks safely
• Excellent access, easy to clean
The Niro MOBILE MINOR™spray dryer has enjoyedunique success ever since itwas first introduced back inthe 1950’s. Around 2000 unitshave been supplied to universities, research centers,and specialist powder production facilities aroundthe world.
The new MOBILE MINOR ‘2000’version has been introducedto meet the still increasingdemand for a more flexible,modern and easy-to-handlelaboratory dryer having different levels of control systems.
Spray drying is a unique drying process involvingboth particle formation anddrying. The powder characteristics can be controlled and powder properties maintained constant throughout a continuous operation. The selection and operationof the atomizer is of extremeimportance in achieving anoptimum operation and production of top-qualitypowders.
In the MOBILE MINOR™ , small quantities of solutions, suspensions, and emulsionscan be dried into represen-tative powder samples. Test results from the MOBILE MINOR™ provideimportant information forselecting the design and technical specification of agiven drying project.
Three alternative atomizing systems are offered:
Rotary atomizer,located in the center of thechamber roof. An air turbinedrive operating from a six-bar compressed air source, supplies power to the atomizer wheel. A vanedatomizer wheel is used fornon-abrasive feeds and anatomizer wheel with carbidebushings for atomizing abrasive feeds. Particles inthe range 5-25µm are created.
Co-current two-fluid nozzle,located also in the center ofthe chamber roof. The atomization is created bycompressed air at a pressureof 0.5-2.0 bar. The feed andatomizing gas are passedseparately to the nozzle headwhere the atomization takesplace. Two-fluid nozzleshave the advantage of han-dling more viscous feeds.The co-current mode isselected for drying heat sensitive products to fineparticles in the range 5-25µm.
Fountain two-fluid nozzle,located in the cone of thedrying chamber, sprayingupwards. The fountain modeis selected to meet a morecoarse and free-flowing powder specification. Oftenused for fine ceramics andother non-heat-sensitiveproducts. The counter-current flow offers a dryerperformance with excellentheat utilization and providesthe longer powder residencetime in the drying chamberrequired to complete the drying to larger particles inthe range 15-80µm.
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MOBILE MINOR™Spray Dryer
MOBILE MINOR ‘2000’
Feed pump, peristaltic
Rotary atomizer
Two-fluid nozzle, co-current
Two-fluid nozzle, fountain
Pre-filter, EU4
Heater, 7.5 kW
Drying chamber, Ø800 mm x 620 mm
Cyclone, Ø140 mm
Cartridge filter (optional)
Cartridge filter, in-line
Exhaust fan, 0.75 kW
Supply fan, 0.75 kW
HEPA filter
Laminar air flow box
Tube/shell condenser
Nitrogen compressor (optional)
Oxygen analyzer
Further available equipment
• Explosion-proof components• Pressure shock resistant
components on request• Chamber extension section• PLC control• Data logging facilities• Exhaust gas filter with
different filter media• Active carbon bed adsorber
for solvent vapors
Different levels of controlsystems are offered — froma traditional wall mountedcontrol panel to the latestPLC operator panel withdisplay and optional outputsignals for data logging.
Material: Surfaces in contactwith product: AISI 316. Other surfaces: AISI 304.
Standards: Designed accord-ing to relevant EU directivesand standards.
Water evaporative capacity:1-7 kg/h depending on temperature profile.
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Plant Configurations
Single point powder discharge Two-point powder discharge
Aseptic design Closed cycle design
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Powder Dust
Dust
DustFinesPowder
Powder
Powder
Compressedgas
CondensateDustFines
Compressed air
Compressed air Optional
Optional
GEA Process Engineering Inc. • 9165 Rumsey Road • Columbia, MD 21045Tel: 410-997-8700 • Fax: 410-997-5021 • Email: [email protected]
GEA Process Engineering Inc. • 1600 O'Keefe Road • Hudson, WI 54016Tel: 715-386-9371 • Fax: 715-386-9376 • Email: [email protected]: www.niroinc.com
