The interior and exterior point machines of folding mask manufacturers

发布日期:2019-09-20 11:49
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With the development of China's economy and land development, air quality is also decreasing, showing fine particles, also known as fine particles, fine particles, PM2.5. In February 2013, the Chinese name of PM2.5 was named Fine Particulate Matter by the National Committee for the Examination and Approval of Scientific and Technological Terms. The chemical composition of fine particles mainly includes organic carbon (OC), elemental carbon (EC), nitrate, sulfate, ammonium salt, sodium salt, etc. PM2.5 has small particle size, large area, strong activity, and is easy to transport toxic and harmful substances (e.g., heavy metals, microorganisms, etc.). Moreover, it has a long stay in the atmosphere and a long transportation interval, which has a greater impact on human health and atmospheric environmental quality. Masks are essential in normal life. The use of folding masks is not only used to prevent haze, but also used in hospitals, food processing plants, coal mine processing and so on.

folding masks manufacturers'masks interior point machine and activated carbon masks have different meanings. Activated carbon is a kind of black powder, granular or pellet amorphous carbon with porous, the primary component is carbon, but also contains a small amount of oxygen, hydrogen, sulfur, nitrogen, chlorine. It also has the fine structure of graphite, but the grains are small and irregular accumulation between layers. It has a large surface area (500-1000 m 2/g) and strong adsorption function. It can adsorb gas, liquid or colloidal solid on its surface. Mask for gas, liquid and adsorbed substance.

The quality of activated carbon is close to that of activated carbon itself. Its adsorption is selective, and non-polar substances are easier to adsorb than polar substances. In the same series of substances, the higher the boiling point, the simpler the adsorption, the higher the pressure, the higher the temperature and the lower the concentration, the greater the adsorption capacity. On the contrary, decompression and heating are beneficial to gas desorption. It is commonly used for gas adsorption, separation and purification, solvent recovery, decolorizer for sugar, grease, glycerin, drugs, deodorant for drinking water and refrigerators, filter in gas mask, and carrier of catalyst or metal salt catalyst. Activated carbon was produced from wood, hard nut shell or animal bone by the former
folding mask manufacturer. Later, coal was mainly used. After distillation and activation, activated carbon was produced by steam and gas activation methods. Carbon is activated by steam or carbon dioxide at 850-900 C. (2) Chemical activation method. Activated carbon can be obtained by using the gas released by the activator or impregnating the material with the activator after high temperature treatment.
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