Aramid Filtre Torbaları

Aokai Filtre Torbaları

Aramid Filtre Torbaları

Aramid filter bags are made of a synthetic fiber material called aramid, also known as Nomex. It was first developed in the 1960s and made commercially available in 1967 by DuPont. For filtration applications, it is most often known as Meta Aramid. As a filtration media, it has the following characteristics:

  • Efficient Particle Retention – The tightly felt structure of the aramid filter media enables it to effectively capture fine particles, thereby achieving high levels of filtration efficiency.
  • High Temperature & Flame Resistance – Aramid filter bags possess remarkable resistance to high temperatures without significant degradation. These aramid bags can withstand continuous operating temperatures of up to 204°C (400°F). In addition, aramid filter bags are self-extinguishing and flame retardant.
  • Kimyasal Direnç – Aramid filter bags are resistant to a wide range of chemicals, including acids, alkalis, and solvents.
  • High Strength and Robustness – Aramid fibers have exceptional tensile strength, which makes the filter bags resistant to tearing and bursting. They can withstand the rough handling and abrasive nature of certain dust particles, resulting in enhanced durability and reliability.
  • Low Thermal Shrinkage – When aramid filter bags are subjected to elevated temperatures, they demonstrate excellent stability and resistance to shrinkage. They maintain their original size and shape even after prolonged exposure to extreme heat.

In addition to these filtration characteristics, aramid filter bags also offer a number of other advantages, such as:

  • Extended Filter Bag Service Life – Aramid filter bags are known for their exceptional durability and longevity. The high-quality construction and chemical resistance nature allow for extended service life, reducing downtime, and minimizing maintenance costs.
  • Geliştirilmiş Temizlik Verimliliği – Aramid filter bags have a smooth and non-stick surface that facilitates effective and efficient cleaning processes. This ensures efficient dust cake release, thorough bag cleaning, and prevents filter bag clogging.
  • Daha Düşük Enerji Tüketimi – Because of its enhanced cleaning efficiency, it helps to reduce the overall pressure drop across the filter media, improving the efficiency and energy consumption of the dust collection system.
  • Environmental Friendliness – Aramid filter bags are eco-friendly and recyclable. They can be disposed of safely without causing harm to the environment.

Scrim-supported felt is used exclusively in the production of our aramid filter bags in order to improve filtration efficiency and extend the filter bag life. Aokai aramid filter bags are widely used in asphalt, cement, and mining & metallurgy industries.

Low Emission Aramid Filter Bags
Aramid Filtre Torbaları

Aramid Filter Bag Dust Collection Characteristics

Aramid filter bags are commonly used in various industrial applications for their exceptional strength, durability, and heat & chemical resistance. They are particularly suitable for high-temperature applications, such as asphalt plants (drum mixers), cement plants (kilns), coal-fired boilers, metal smelting processes, and chemical processes.

CharacteristicsRating
Fiber Content100% Virgin Aramid
Fabric ConstructionNeedle felt
Ağırlık450-550g/m² (13.3–16.2 oz/yd²)
Kalınlık1.8-2.2mm (0.071–0.087 inch)
Hava permenabilitesi (m3/m2/dak)22-26(±20%)
Sürekli Çalışma Sıcaklığı204°C (400°F)
Maximum Surge Temperature250°C (482°F)
Aşınma Direnciİyi
Asit Direnciİyi
Alkali Direnciİyi
Moist Heat Resistantİyi
Energy Absorbsionİyi
Filtration PropertyMükemmel
Oksijen (15%+)Zayıf

Pros

Great resistance to highly abrasive and high temperature dust applications, extended service life, reduced energy consumption.

Cons

Higher costs, poor hydrolysis resistance, and mineral oxides can cause deterioration or partial decomposition over time.

Endüstri ve Uygulama

Asphalt Industry, Cement Industry, Mining & Metallurgy Industry, Power Generation.

Aramid Filtre Torbaları

Aramid Filter Bag Construction & Treatment

Aramid filter media can be constructed and treated with various options so that they become best suited for various operating conditions, applications, and industries.

Filtre Malzemesi Yapısı

Needle Felting

Aramid fibers are matted together through a needle felting process, which is a traditional non-woven fabrication process by punching a fiber batt into itself to hook and entangle fibers which then form a thin, relatively dense structure, either with or without a light woven support scrim. Felts offer enhanced filtration efficiency, lower pressure drop, and higher dust-carrying capacity. They are commonly used for applications where fine particle retention is crucial. To further improve filtration efficiency and filter bag life, Aokai custom designs and manufactures Dual-Density Aramid Filter Media. In a genuine dual-density filter media, two layers of media of different densities are separated by a scrim in the middle that provides dimensional stability and a densified central core which improves filtration efficiency by minimizing dust migration through the felt. The scrim structure offers a clear advantage over unsupported felts (without scrim) which are produced in a single process with a homogeneous fiber blend and filtration characteristics only.

Spunlacing (hydro-entagling)

Spunlacing is a revolutionary hydro-entangling nonwoven fabrication process that is used to entangle fibers with high-pressure water jets. The spunlacing process creates a unique balance of lower mean pore size in a mass-efficient structure, which delivers industry-leading dust collection performance. It represents a new paradigm in filtration media by delivering a product with dramatically improved filtration efficiency, an inherent ability to promote surface dust collection, lower pressure drop over time, and a reduction in pulse cleaning cycle times.

Filtre Ortamı Arıtımı

Aramid filtre torbasına bir ePTFE membran eklenmesi, membranın filtre keki görevi görmesini sağlar. Toz, membranın yüzeyinde kalır ve filtre torbasının liflerine karışmaz, bu da filtre torbanızın ömrünü uzatır. Ayrıca, temizleme döngüsü sırasında toz kekinin kolayca serbest kalması nedeniyle aşınma ve yıpranmayı azaltır, bakım maliyetlerini düşürür ve enerji maliyetlerini düşürür.

The filter media is coated in a bath or spray of liquid PTFE resin. This is done to protect filter bags. The treatment improves the flex life, heat and chemical resistance, and dust release from the filter bags. This increases the service life and filtration efficiency. PTFE finish is commonly used in applications with corrosive chemical compounds, sticky dust, or high moisture contents.

This aids in filtration, adds resistance to water and oils, and improves cake release.

Helps to ground the filter bag to eliminate sparks that might cause combustion explosions.

Singeing, filtre medyasının yüzeyinin bir aleve veya sıcak gaza maruz bırakılarak ince ve dağınık elyafların yakıldığı bir sonlandırma işlemidir ve bu sayede daha düzgün ve pürüzsüz bir yüzey alanı elde edilir, bu da kek salınımını, gelişmiş filtrasyon verimliliğini ve daha iyi hava geçirgenliğini artırır.

Yakma işlemi tipik olarak kumaşın açık bir alevin üzerinden veya ısıtılmış bir odadan geçirilmesini içerir. Isı, kumaşın ana yapısına zarar vermeden çıkıntı yapan lifleri yakar. Hız ve sıcaklık gibi proses parametreleri, istenen pürüzsüzlük ve finisaj seviyesine ulaşmak için dikkatlice kontrol edilir.

Glazing, also known as calendering, is the high-pressure pressing of the fabric by rollers to flatten or smooth the surface. Glazing pushes the surface fibers down onto the body of the filter media to increase and uniform surface life, improve stability, reduce shrinkage, and improve dust cake release.