Principle of spray generation:

• The droplet generation is based on a piezoelectric driven actuator, vibrating a thin, perforated, stainless steel membrane in a small spray cap
• The membrane (spray mesh) 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

Principle

• The drying gas enters in laminar flow from the top into the drying chamber and is heated up to the set inlet temperature
• The piezodriven spray head generates ultra-fine droplets, which are gently dried into 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 and, in addition, the gas is filtered

Application areas:

• Nanoparticle suspensions/nanoemulsions
• Nanoparticle agglomerations
• Structural modifications
• Generation of nanoparticles with high recovery rates
• Spray drying of aqueous and organic solvent samples

Key features and benefits:

Heating system (patent pending)

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

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

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 trials
• Export of process parameters for further data analysis

Height adjustable peristaltic pump

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

Novel piezoelectric driven droplet atomizing technology

• Ultrasonic atomization at 60 kHz driving frequency for gentle and soft droplet generation
• Choice of three different spray caps with 4.0, 5.5 or 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

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 the protection of users and the environment

• Power consumption: 1500 W (max)
• Connection voltage: 100 – 240 VAC ± 10 %
• Frequency: 50/ 60 Hz
• Heating capacity: 1400 W (max)
• Max. inlet temperature: 120oC
• Evaporating capacit: max. 0.2 l/h H2O, higher for solvents
• Drying gas flow: 80 – 160 lít/ phút
• Spray caps (hole diameters): 4 μm, 5.5 μm, 7 μm
• Mean droplet size range: 8 – 21 μm
• Mean particle size range: 300 nm – 5 μm
• Mean residence time: 1 – 4 giây
• Protection rating: 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)