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2020
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08
Principle of Micron-Scale Dry Fog Dust Suppression
Author:
Oxygen spray
The dry-mist dust suppression system utilizes the dry mist generated by a dry-mist sprayer. 10 micro- Fine water mist particles below m (diameter 10 micro- Fog with a droplet diameter of less than m is referred to as dry fog, which causes dust particles to adhere to one another, aggregate and grow in size, and then settle under the influence of gravity.
Dust particles can agglomerate and grow in size through water adhesion; however, the finest particles will only coalesce into clusters when the water droplets are extremely small—such as in dry fog—or when chemical agents, like surfactants, are added to reduce the water’s surface tension, as shown in the figure. As shown in Figure 1, if the diameter of the water‑mist droplets is larger than that of the dust particles, the dust will merely be carried along by the airflow surrounding the droplets, with little or no opportunity for direct contact between the droplets and the dust. In this case, the dust‑suppression effect will not be achieved. Conversely, when the sizes of the water‑mist droplets and the dust particles are comparable, the dust particles, as they move with the airflow, will collide with and adhere to the droplets. The smaller the droplets, the greater the likelihood of agglomeration; as these agglomerates grow in size and weight, they readily settle out. Thus, the “filtration” effect of the water mist on the dust is established.
The micron‑scale dry‑mist dust suppression device is a sonic oscillator powered by compressed air that uses high‑frequency sound waves to atomize water into an ultrafine mist. “Explosion” turns into thousands upon thousands of 1–10s. micro- Water‑mist particles of size m, as shown in Figure 2. A compressed air stream passes through the nozzle’s resonant chamber, atomizing the water into a soft, low‑velocity mist that is sprayed directly onto the dust‑generation point, causing the dust to agglomerate and settle, thereby achieving dust suppression.
The process flow of the micron‑scale dry‑mist dust suppression system is shown in the figure. As shown in Figure 1-1, when the dust suppression equipment is operating, the micron‑level dry fog generator runs either synchronously or in advance, allowing air and water to pass through the micron‑level dry fog generator and enter the atomizer assembly to produce a spray.
Dry-mist dust suppression,Dry fog,Nozzle
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