Friday, 1 June 2012

Nano Spray Dryer B-90


Small ml quantities
  • The Nano Spray Dryer B-90 is the ideal laboratory instrument for processing the smallest quantities, typically used in feasibility studies. Spray drying of valuable substances within the submicron range is possible.
  • Main fields for the innovative spray dryer are found in pharmaceutical, biotech, material- and nanotechnology applications.
Submicron particles
  • The innovative piezo crystal driven spray head generates a mist of fine droplets with very narrow size distribution. Different spray caps with 4.0, 5.5 and 7.0 μm hole sizes are available to tune the average droplet size between 8 to 21 μm precisely.
  • Nanoparticle suspensions and nanoemulsions are typical applications for the Nano Spray Dryer B-90.
High yields up to 90%
  • The unique electrostatic particle collector offers excellent particle separation efficiency for submicron- and nanoparticles of milligram sample amounts.
  • This ensures the recovery of high value and expensive materials in R&D studies and feasibility tests. This unique technology is ideal for samples used in pharmaceuticals, medical products, advanced materials and innovative food ingredient industries.

  • Processing of sample amounts <100 mg
  • Droplet size in the range of 8 to 21 µm
  • Smallest dried particles of 0.3 to 5 µm with very narrow size distribution
  • Electrical particle collector with 99% separation efficience
  • High product yields up to 90%
  • Spray drying of minimal ml-quantities


  • The drying gas enters laminarly from the top into the drying chamber and is heated up to the set inlet temperature
  • The piezodriven spray nozzle generates ultra-fine droplets, which are gently dried to solid particles
  • The dried solid particles are electrostatically charged and collected at the collecting electrode
  • The drying gas exits the spray dryer, the outlet temperature is measured, in addition, the gas is filtered
The Nano Spray Dryer B-90 offers a fast drying process for temperature sensitive materials, excellent product yields and low energy consumption.

Spray generation

  • The droplet generation is based on a piezoelectric driven actuator, vibrating a thin, perforated, stainless steel membrane (mesh) in a small spray cap
  • The membrane features an array of precise micron-sized holes.

  • The actuator is driven at an ultrasonic frequency, causing the membrane to vibrate, ejecting millions of precisely sized droplets every second with very narrow droplet size distribution

Spray head based on piezotechnology

Spray head with piezotechnology

Spray caps with perforated meshes
(4.0, 5.5 and 7.0 μm hole size)
Novel piezoelectric driven droplet atomizing technology
  • Ultrasonic atomazation at 60 kHz driving frequency for gentle and soft droplet generation
  • Choice of three different spray caps with 4.0, 5.5 and 7.0 μm mesh hole size
  • Very narrow droplet size distribution
  • Simple exchange of spray caps
  • Easy cleaning of spray head with detergents or in an ultrasonic bath

Heating system (patent pending)

  • Compact porous metal foam for optimal heating energy input
  • Short heat-up times up to 120 °C
  • Generation of laminar gas flow in the drying section
  • Connvective heat transfer between droplets and gas
  • Fast heating control by pluggalbe PT-1000 temperature sensor

Innovative electrical particle collector for highest yield

Innovative electrostatic particle collector for submicron- and nanoparticles
  • Particle separation rate is independent of particle mass (as in cyclones) and allows collection of fine nanoparticles (separation efficiency >99%)
  • Excellent product yields up to 90 % for small sample quantities <100 mg
  • Simple particle collection with manual particle scraper
  • Integrated outlet gas filter for user and environment protection

Easy operation and PC-software for online data monitoring and storage

Easy operation and instrument control
  • Visualized process parameters and simple display control
  • Convenient setting of inlet/outlet temperature, drying gas flow, spray rate and pressure on the front panel
PC-software for online data monitoring and storage
  • Data storage of experimental runs in a library

  • Documentation of process data of experimental runs
  • Export of process parameters for further data analyis (eg. to MS Excel)

Height adjustable pump

  • Sample  feeding  with  pluggable  peristaltic pump
  • Continous recirculation of the sample, from  sample  vessel  to  spray  head and back
  • Minimal dead volume in the feeding tubes

Modular glass assembly of the spray cylinder

Modular glass assembly of the spray cylinder
  • Visibility of the complete spray process from droplet generation to particle collection
  • Use the short instrument for ultra-fine droplet production and the tall unit for larger droplets and water based samples
  • Angular spray head installation for heat sensitive materials and small sample amounts down to 1 ml
  • Simple and ergonomic installation of modular glassware
  • This table-top instrument is easy to clean and sterilize


Open mode for aqueous samples and not oxygen sensitive materials

Drying with air for aqueous solutions with < 20 % organic solvents. The Dehumidifier B-296 is used for reproducible conditioning of the inlet drying air humidity.

Compressed air is used as a standard drying gas. The air maintenance unit is additionally recommended to assure oil free and particle free gas.

Closed mode for organic solvents and oxygen sensitive materials

Safe drying of pure organic solvents with automatic control of the O2 concentration in the circuit below 4 %. N2 and CO2 are used to control the efficiency of the electrical particle collector.

Drying of oxygen sensitive substances or flammable powders under N2 and CO2 atmosphere. The B-296 in a closed loop enables the safe use of water-organic solvent mixtures with up to 50 % solvent.

Technical data of the Nano Spray Dryer B-90

Power consumption max. 1500 W
Connection voltage 100 – 240 V ± 10 %
Frequency 50/60 Hz
Heating capacity max 1400 W
Heating control ± 1 °C
Max. inlet temperature 120 °C
Evaporating capacity max. 0.2 l/h H2O, higher rates for organic solvents are possible
Drying gas flow 80 –160 l/min
Spray caps (Hole diameters) 4.0 μm, 5.5 μm, 7.0 μm
Mean droplet size range 8 – 21 μm
Mean particle size range 300 nm – 5 μm
Mean residence time 1 - 4 sec
Interface USB II
Degree of Protection IP 42
Pollution degree 2
Environmental conditions for indoor use only
Temperature 5 – 40 °C
Altitude up to 2000 m
Humidity max. relative humidity 80% for temperatures up to 31 °C, and then linearly decreasing to 50% at 40 °C
Dimensions ( W x H x D) 58 x 110 x 55 cm (short set-up) / 58 x 150 x 55 cm (tall set-up)
Weight 65 kg (short set-up) / 70 kg (tall set-up)

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