The degree of wetting of the dust particles by the liquid depends on the effect of the liquid molecules on the surface of the particles. At the surface tension of the solid-liquid-gas three-phase junction, the force at the junction point A reaches equilibrium and the larger the wetted solid surface, the more wet the particles. The wettability of the particles is also related to the shape and size of the particles. The wettability of spherical particles is smaller than that of irregular particles, and the smaller the particles, the poorer the hydrophilicity. The rough surface of the particles is also not easily wet. Heating the water to approximately 70 degrees is the most effective wetting particle, which is effective for wet scrubbers.
For wettability of good hydrophilic dust (such as cement, lime, boiler fly ash, quartz dust, etc.) optional wet scrubbing dust. For poorly hydrophobic hydrophobic dust (such as graphite, coal powder, paraffin), some kind of sizing agent (such as saponin) can be added to the water to increase the hydrophilicity of the dust. Infiltration test is mainly used in China capillary action method, that is, a certain length of glass tube filled with dust, so that it is placed in the water tank, when the water and dust contact, due to the formation of capillary space between the dust particles, water Gradually rise, soaking dust. The height of the rise of dust within the test tube within a fixed time (eg 10 min) is the infiltration of the measured dust. Dust infiltration and moisture absorption is one of the basis for selecting the dust removal method. The use of wet dust removal methods for hydrophilic dust may achieve better results, and for wet dust, wet dust removal is not appropriate. For hygroscopic dust, the degree of dust removal may have to be increased, otherwise sticky dust bags may also occur. When the mine is dust-proof and wet dust suppression, in order to increase the dust removal effect, some dust-reducing agents and surfactants may be used to increase the degree of infiltration.