Liquid nebulizer with binary nozzle and cyclone

The AGF 10.0 system comprises an adjustable binary nozzle to adjust the desired mass flow and a cyclone with a cut-off of 10 µm.

Fig.1: Schematic diagram of the aerosol generator

The liquid to be dispersed is filled in the reservoir, and the AGF 10 is connected to the compressed air connection. A manometer enables the mass flow of the liquid to be continuously adjusted using the primary pressure on the nozzle. The mist of droplets generated by the nozzle flows tangentially into a cyclone. Large particles are separated by centrifugal force and drip back into the reservoir. The remaining droplets leave the cyclone via the so-called "immersion tube." The size spectrum of these droplets is determined on the one hand by the primary droplet spectrum generated by the nozzle, but especially by the separation characteristics of the cyclone on the other hand.

The separation size can be calculated: d_aerodyn.max = 10 µm, i.e., regardless of the liquid to be atomized, the maximum particle size is d_aerodyn ≈ 10 µm.

*applied for DEHS **test rig version ***average number diameter

Table 1: Overview of the AGF and UGF systems