Recently, most parts of Jiangsu Province suffered from severe haze weather. Where does the smog belong?

1. Haze, as the name implies, is fog and haze. But there is a big difference between fog and haze. The aerosol system composed of dust, sulfuric acid, nitric acid and other particles in the air causes visual impairment, which is called smog. Haze is haze.

2. Fog is an aerosol system consisting of a large number of tiny water droplets or ice crystals suspended in the air near the ground. It mostly occurs in autumn and winter (which is also one of the reasons for the large-scale haze weather in China in June 20 13), and it is the product of water vapor condensation (or condensation) in the near-surface air. The existence of fog will reduce air transparency and worsen visibility. If the horizontal visibility of the target drops below 1000 meters, the weather phenomenon of water vapor condensation (or condensation) suspended in the air near the ground is called fog.

3. Haze (mái), also known as haze (smog), dust, sulfuric acid, nitric acid, organic hydrocarbons and other particles in the air can also make the atmosphere turbid. The phenomenon that the horizontal visibility of the target is 1000 ~ 10000 meters is called light fog or mist. When fog is formed, the atmospheric humidity should be saturated (if there are a large number of condensation nuclei, the relative humidity may not reach 100%, and saturation may occur). Because the light scattered by fog composed of liquid water or ice crystals has little to do with wavelength, the fog looks milky white or bluish white and gray.

Preventive measures:

If it is dust-proof or smog-proof, the protective effect of KN 100 mask is good. It is recommended to choose high-grade silicone material for masks. It is recommended to choose cotton filter element with two-piece design. Cotton filter is double-sided or pleated, with large area and smooth breathing.

At present, due to the improvement of mechanization level, the dust concentration in the working environment is high, the mask selection is wrong, the price is paid too much attention, the protective effect, quality, comfort and service life of the mask are neglected, and it is easy to choose low-grade and counterfeit products, resulting in occupational injuries. It is suggested that dust masks should be selected scientifically according to GB2626-2006 standard to effectively prevent respiratory system injury.