If the diameter of the water droplet is larger than the dust particle it will be moved away by the air movement caused by the droplet and there will be no contact between them. In fact it is difficult to cause an impact with particles of a few microns in size on any type of surface.
For this reason inertial separators do not work well at this level of small sizes. If on the contrary the water droplet has a size similar to the size of the dust particle, the contact occurs while the dust particle is drawn by the air flow. Consequently the possibility of impact increases as the water droplets are smaller and smaller.
This explains why the classic type of sprayers does not work on the dust particles denominated as "breathable": the typical size of water droplets ranges from 200 to 600 micron. This size is larger than the majority of dust particles that range from 5 to 150 micron.
Consequently the only method to reduce dust in large areas is to utilise water nebulisers equipped with a large quantity of nozzles (generally more than 50 nozzles) capable to produce very small water droplets. The smaller the size of the water droplets the greater the quantity of dust is reduced. The design of the A-JET Turbo Fog System is specifically based on this knowledge and is beneficial to any sector that requires control of dust emissions over medium to large areas.