Can aramid filter bags be covered with film?
With the development of industrial society, people’s awareness of environmental protection is also gradually strengthened, and the treatment methods of various waste liquid, waste gas and solid waste residues produced by industry are also constantly optimized. Recently, PM2 the emergence of 5 has attracted everyone’s attention. It mainly comes from various waste gases in life or production. In order to reduce PM2 in the air to improve air quality, it is necessary to treat all kinds of waste gas, especially industrial waste gas. So choose a good aramid filter bag manufacturer.
At present, the treatment of industrial waste gas mainly adopts the method of needle punched felt filter bag, while the existing needle punched felt is generally an ordinary layered composite structure. The flue gas temperature in iron and steel, metallurgy, electric power, chemical industry, pharmaceutical and other industries is high and has strong acid corrosivity. The needle punched felt with ordinary layered structure is difficult to meet the burning of filter bag by high temperature, high acid and high corrosion particles and the destruction of filter material by corrosive gas. At the same time, it is easy to accumulate ash, difficult to remove ash and shorten the service life, which increases the production cost of the enterprise and is easy to cause production accidents such as fire.
In view of the above problems, the utility model provides an aromatic fiber composite needle punched membrane coated filter bag with innovative structure, good heat resistance, good thermal oxygen aging stability and good acid resistance.
In order to solve the above technical problems, the utility model provides an Aramid Composite needle punched membrane covered filter bag, which at least comprises a bag like structure formed by the aramid fiber layer on the dust facing surface and the polyester fiber layer on the opposite side, the aramid fiber layer and the polyester fiber layer are staggered connected with each other by needle punching, the outer layer of the aramid fiber layer and the polyester fiber layer is covered with a functional microporous membrane, and the functional microporous membrane includes PTFE microporous membrane and / or PPS microporous membrane and / or acid resistant Corrosion resistant microporous membrane and / or anti-static microporous membrane and / or chitosan microporous membrane coating, aramid fiber layer and polyester fiber layer are rolled by large mouth singeing and ironing roller to flatten the surface, form a dense void structure, and form a strong bond between high melting viscosity and functional microporous membrane.
Further, it also includes a basalt fiber base cloth layer located in the middle, and the base material of the basalt fiber base cloth layer includes basalt fiber monomer.
Furthermore, the basalt fiber base cloth layer is also doped with flexible steel wire. The mass ratio of basalt fiber monomer to flexible steel wire is 1:0.1 ~ 0.6.
Further, the anti-static microporous membrane includes a softener wetting layer and an anionic surfactant or white oil coating.
Further, the aramid fiber layer and the polyester fiber layer are set to curved arc or U-shape through pretreatment.
Further, the polyester fiber layer is set to curved arc or U-shape through pretreatment.
Further, the thickness of the functional microporous membrane shall not exceed 0.5mm.
Further, the aramid fiber layer includes short fiber monomer and long fiber monomer, which are wound into a three-dimensional void structure by acupuncture. The ratio of short fiber monomer to long fiber monomer is 1:0.2 ~ 0.8.
Further, the polyester fiber layer includes short fiber monomer and long fiber monomer, which are wound into a three-dimensional void structure by acupuncture. The ratio of short fiber monomer to long fiber monomer is 1:0.2 ~ 0.8.
Compared with the prior art, the utility model has the beneficial effects that: the dust facing surface of the utility model is aramid fiber and the reverse side is polyester fiber, forming a composite structure and improving the heat resistance of the filter material; Needle punching nonwovens directly cover the lotion after burning. It avoids the drying process of the first emulsion impregnation process, reduces the energy consumption and improves the production efficiency. The function of the microporous membrane is compensated to ensure the porosity and the applicability is wider. By reducing the singeing speed and opening the fire port at the same time, the melting degree of aramid fiber is improved, so as to improve the adhesion fastness of functional microporous membrane to aramid needle punched cloth and polyester needle punched cloth.