●Technical parameters

●Introduction to imported acrylic filter bags
Acrylic filter bags, also known as polyacrylonitrile (Acrylic) needle felt filter bags, have good chemical resistance and medium temperature performance. Imported acrylic filter bags (such as German Dralon, American Membrana and other raw materials) are superior to domestic materials in terms of fiber purity, textile technology, physical strength and durability, and are widely used in dust removal systems in corrosive or acidic gas environments.
●Basic parameters:
Project indicators
Material 100% polyacrylonitrile (acrylic) needle felt
Thickness is usually 1.6~2.2 mm
Weight 500~550 g/m²
Continuous temperature resistance 120~140°C
Instantaneous temperature resistance can reach 150°C
Surface treatment singeing, calendering, laminating, waterproof and oil-proof, etc.
Applicable industries: waste incineration, chemical industry, cement, non-ferrous smelting, asphalt mixing, etc.
●Advantages of imported acrylic filter bags
1. Excellent acid and alkali corrosion resistance
Imported acrylic filter bags have good tolerance to weak acids, weak alkalis and oxidizing gases, and are particularly suitable for acid mist or sulfur-containing conditions.
2. Strong stability in medium temperature conditions
The temperature resistance can reach 140°C, which is suitable for medium temperature flue gas treatment such as boiler exhaust gas and chemical reaction exhaust gas.
3. The filter material has a dense structure and high filtration efficiency. The imported needle-punched felt has uniform fibers and a stable pore size distribution. It can efficiently intercept dust particles. The emission concentration can be stably lower than 30mg/Nm³, and the coated products can even reach below 5mg/Nm³.
4. The hydrolysis resistance is better than that of domestic products. High-quality imported acrylic fibers have stronger hydrolysis resistance, which avoids embrittlement or failure of filter bags due to high humidity or condensed gas.
5. Long service life. Due to the high tensile strength, excellent wear resistance and low thermal shrinkage of imported fibers, the filter bag life can reach 2 to 4 years, greatly reducing maintenance costs.
●Typical application scenarios
Garbage incineration flue gas dust removal (containing acidic gas)
Asphalt mixing station dust removal
Neutralization tower and pickling section of chemical plant
Nonferrous metallurgy (lead, zinc and copper) tail gas treatment
Dry dust removal system before desulfurization of power plants
Food, medicine and other working conditions that require corrosive gases

●Company Introduction:

Jiangsu Dongfang Filter Bag Co., Ltd. is an enterprise integrating R&D, production, sales, technical support and service, covering an area of ​​90,000 square meters. It has 13 production lines imported from Germany, including Autefa, Truetzschler, Karl Mayer, Etten hanging systems, high-speed needling machines, etc. It currently has 220 employees and an annual production capacity of 12 million m².

●Factory appearance:

●Industry Applications:

●FAQ:

Q. What surface treatments are required for medium temperature filter bags?
A. Common surface treatments include:
Singeing and calendering: prevent dust from embedding in fibers and improve cleanability
Coating (PTFE membrane): improve filtration accuracy to submicron level
Water and oil repellent: used for high humidity or oily flue gas
Antistatic: suitable for explosion-proof occasions

Q. What industries are suitable for medium temperature filter bags?
A. Widely applicable industries, including but not limited to:
Waste incineration power plants
Asphalt mixing plants
Chemical industry (fertilizers, pesticides, resins)
Cement kilns, lime kilns
Power plant boilers
Nonferrous smelting

Q. What is the general service life of medium temperature dust removal filter bags?
A. Under normal working conditions, the service life can reach 1.5 to 3 years, but it is affected by the following factors:
Severe fluctuations in flue gas temperature → shortened service life
Acidic gas + high humidity → hydrolysis damage
Too frequent cleaning or excessive wind speed → accelerated wear