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DDU 570/H

Diffusion Dryer Unit DDU 570/H for drying of water-containing aerosols by silica gel, high model

The diffusion dryer unit DDU 570/H is used for drying aerosols generated from an aqueous suspension or solution. The diffusion dryer is used downstream of the aerosol generator.
Diffusion Dryer Unit DDU 570/H
The Diffusion Dryer DDU 570 has been developed mainly as additional equipment for the Aerosol Generators produced by Topas GmbH. The diffusion dryer consists of an Acryl tube with 2 caps on its ends and tube connectors. In the operation status the dryer is filled with Silica gel. The aerosol to be dried is streaming through 3 screen pipes which are surrounded by Silica Gel (with indicator) serving as drying agent. The Silica gel causes a very dry atmosphere. The water in the aerosol moves into the dry environment by the effect of diffusion. Because the aerosol does not get into direct contact with the drying agent only a very low particle loss occurs.

Standards

VDI 3491-6
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Benefits

  • effective aerosol drying by diffusion
  • minimal particle losses (no direct aerosol flow through desiccant)
  • desiccant's load condition is visualised by colour change
  • regenerable desiccant (e.g. by drying oven/desiccator regeneration)

Applications

  • drying of wet aerosols
  • in connection with Atomizer Aerosol Generators Series ATM: Generation of calibration aerosols with aqueous suspensions of reference particles
  • in connection with an atomizer: used for nuclei source of the condensation aerosol generator SLG 270
Parameter title Unit Value
sample condition, outlet - dryed aerosol
purpose of conditioning - drying
aerosol, temperature °C max. 40°C
volumetric flow rate, inlet L/min max. 10
sample condition, inlet - moist aerosol
operating medium g silica gel (830)
ambience, temperature °C max. 40
weight kg 0,94 (empty)
hose connector mm Ø 8
dimensions (d × h) mm 70 × 475
  • Tarik M., Foppiano D., Hess A. and Ludwig C. A Practical Guide on Coupling a Scanning Mobility Sizer and Inductively Coupled Plasma Mass Spectrometer (SMPS-ICPMS) J. Vis. Exp. 125 (2017) 0, e55487
    dx.doi.org/10.3791/55487
  • Stevanovic S, Miljevic B, Madl P, Clifford S, Ristovski Z Characterisation of a commercially available thermodenuder and diffusion drier for ultrafine particles losses Aerosol Air Qual. Res. 15 (2015) 1, 357-363
    dx.doi.org/10.4209/aaqr.2013.12.035
  • Göhler D., Stintz M., Hillemann L. and Vorbau M. Characterization of nanoparticle release from surface coatings by the simulation of a sanding process Ann. Occup. Hyg. 54 (2010) 6, 615 - 624
    dx.doi.org/10.1093/annhyg/meq053

Silimar products

DDU 570/L

Diffusion Dryer Unit DDU 570/L for drying of water-containing aerosols by silica gel, short model

Diffusion Dryer Unit DDU 570/H
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