Autore: Vanessa 28 aprile 2025 Categoria: Applicazioni
The core advantages of aramid fiber as a high-performance filtration material are reflected in many aspects:
1. Excellent temperature resistance:
Aramid fiber has excellent thermal stability, and its continuous working temperature can reach 200°C, and it can withstand a high temperature environment of 260°C in a short period of time. This feature makes it perform well in high-temperature industrial scenarios such as waste incineration and metallurgy. For example, the usage data of the Duisburg waste incineration plant in Germany showed that after 8,000 hours of continuous operation in a 250°C flue gas environment, the structural integrity of the aramid filter bag remained above 95%.
2. Excellent mechanical strength:
The tensile strength of aramid fiber exceeds 3000MPa, which is 5 times that of ordinary steel, and its weight is only 1/5 of that of steel. This high strength property enables it to withstand high pressure difference conditions in industrial filtration systems. Tests in the Lyon laboratory in France show that aramid filter bags can still maintain stable filtration efficiency under 0.5MPa pressure difference conditions, while ordinary polyester filter bags will have structural damage under this condition.
3. Excellent chemical stability:
Aramid fiber has extremely strong chemical corrosion resistance and can withstand strong acid and alkali environments with a pH range of 1-14. Application cases in the Milan Chemical Park in Italy show that after aramid filter material is immersed in a 30% sulfuric acid solution for 30 days, its mechanical properties lose no more than 5%, which is much better than other synthetic fiber materials. This property makes it particularly suitable for filtration applications in highly corrosive environments such as chemical industry and electroplating.
4. Unique flame retardant properties:
The limiting oxygen index (LOI) of aramid fiber is as high as 29-32, which is an inherently flame retardant material. Research from the University of Cambridge in the UK has confirmed that aramid filter bags will not drop when exposed to open flames, and can effectively prevent secondary ignition. This feature makes it the preferred filter material for explosion-proof places such as petrochemicals and coal mines.
In the industrial practice of European countries, aramid fiber filtration technology has formed a complete application system with its excellent performance, covering multiple key industrial fields:
1. Chemical and explosion-proof fields
A chemical plant in Ludwigshafen, Germany, uses aramid coated filter bags to treat flammable dust generated during the production of polypropylene. This special filter bag combines the high temperature resistance of aramid fiber and the surface filtration advantages of PTFE membrane. It not only meets the ATEX explosion-proof certification requirements, but also increases the filtration efficiency to 99.97%. Actual operation data shows that compared with traditional filter materials, its service life is extended by 40%, while the dust emission concentration is controlled below 1mg/m³, which is far below the 10mg/m³ limit stipulated by the EU.
In the catalytic cracking unit of a refinery in Rotterdam, the Netherlands, aramid filter elements are used to intercept catalyst particles with a particle size of less than 5μm. By optimizing the fiber weaving density and surface treatment process, these filter elements maintain high flux (≥5m³/m²/min) while extending the replacement cycle from the original 3 months to 9 months, and the service life is increased by 3 times. This solution saves the factory about 1.2 million euros in maintenance costs each year, while reducing waste generation by 30%.
2. Energy and environmental protection field
A French waste incineration plant uses Nomex® aramid filter bag system to treat high-temperature flue gas at 250°C. The specially designed filter bag structure contains three layers of protection: surface anti-sticking treatment, middle aramid substrate and inner conductive fiber, which can effectively capture fly ash and dioxins and prevent static electricity accumulation. Operation data shows that the system stabilizes the particle emission concentration below 5mg/Nm³, which fully meets the strictest standards of the EU Industrial Emissions Directive (IED).
The Stockholm biomass power station in Sweden successfully solved the problem of rapid wear of traditional filter bags in the biomass combustion fly ash environment by using high-density aramid needle felt filter bags. Actual application cases show that the wear resistance of the new filter bag is improved by 300%, and the annual replacement frequency is reduced from 6 times to 2 times, which directly reduces the maintenance cost by 40%. In addition, its filtration efficiency of 99.9% ensures that the heavy metal content in the flue gas is less than 0.01mg/m³, meeting the special requirements of the Swedish Environmental Protection Agency.
With the increasingly stringent EU industrial emission standards, aramid fiber filtration technology will not only continue to consolidate its position in the traditional industrial field, but also open up a broader application space in emerging fields such as new energy and carbon capture. Through continuous industry-university-research cooperation, Trenntech filtration is transforming breakthroughs in material science into actual industrial value and setting a new technical benchmark for the global filtration industry.