Dust suppression
Small orifice misting nozzles for dust suppression
By forcing fluid through a very small orifice at high pressure sufficient turbulence is created to atomise the spray into a fine fog. At lower pressures such nozzles will form a mist (a mist simply has larger droplets than a fog).
The limiting factor for this method of producing a mist is blocking of the orifice. As the production of the mist is entirely due to the small orifice it has a very small free passage and any small contaminants in the fluid may cause a blockage. Effective filtration is required if there is any chance of contamination by particles.
![Small orifice misting nozzle for cooling systems](/images/nozzle-design-drawings/misting-small-orifice3.jpg?sfvrsn=2e0d9027_0)
For dust suppression applications small orifice misting nozzles are suitable for symptomatic dust control as they produce sprays with a large number of droplets of a similar size to many common dust particles. The sprays from these nozzles have almost no impact and momentum. As such, they would be unsuitable for dust suppression in windy environments.
![Microwhirl misting nozzle](/images/default-source/nozzle-boxes/micowhirl-c.jpg?sfvrsn=c1b2fd7a_14)