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The applicaiton of e-PTFE membrnne is on the Filtration and Dust Elimination
- Sep 07, 2018 -

        Since the end of 2013, more than 100 large and medium-sized cities in 25 provinces have experienced haze weather in varying degrees, covering nearly half of China, and responding to the aggressive haze, according to data from the Ministry of Environmental Protection since the end of 2013. Including high speed road closure, airport shutdown, construction site shutdown, school closure, air pollution has become a serious impact on peopleundefineds normal production and life and health of the important livelihood issues, to take effective measures to control air pollution is urgent. Experts said that the air quality reached the condition of heavy pollution, the primary pollutant is fine particulate matter (PM2.5), the weather factor is the direct factor that triggers and exacerbates the influence of haze, but the fundamental factor is the persistent pollutant emission. The total amount of the main air pollution emissions far exceeds the environmental capacity. 


      PM2.5 (particulate matter) means the particulate matter of the inhalable lung of the human body under the meaning of 2.5um, which has been paid more and more attention to at home and abroad. The emission of industrial dust is one of the main sources of PM2.5 in the atmosphere. It is of practical significance to control the emission of PM2.5 in industrial dust to reduce air pollution and ensure the health of the general public. Bag dust collector, as the main equipment for dust pollution control, is a kind of traditional and efficient filter dust collector, and the application of expanded polytetrafluoroethylene membrane to bag filter is a new type of filter developed in recent years. High-efficiency air filtration and dust removal technology is effective in preventing and controlling smoke dust, ultrafine dust and air pollution. The bag dust collector made from expanded PTFE membrane is made of two kinds of materials with different properties processed by special technology. The surface layer of expanded PTFE is thin, dense, smooth and porous, which mainly plays a filtration role. The traditional concept of filtration is changed, which is called membrane surface filtration, and the bottom filter material is traditional filter material or the substrate made of pure PTFE fiber. The substrate mainly plays the role of supporting the surface film and enhancing the mechanical strength. Compared with the traditional filter media, the new filter media has the advantages of more uniform pore diameter, better stability, lower running resistance and higher filtration efficiency. Even for submicron dust, the filtration efficiency is still over 99.9%. In addition, the expanded PTFE filter material can work under high humidity conditions for a long time, ash removal is also very easy. In addition, PTFE itself has excellent characteristics of resistance to acid, alkali corrosion, high temperature, high humidity, oil resistance, pressure resistance, hydrolysis resistance and oxidation resistance. It has a wide application prospect in the field of flue gas dust removal, especially in the field of filtration of PM2.5, such as furnace kiln and power plant coal-fired boiler, waste incinerator, dust removal, air filtration and so on in the building materials and cement industry.

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