Industrial Dust Filter Bag for Baghouse Dust Collector System
Introduction:Dust filter bags are the core consumable components of baghouse dust collectors for industrial flue gas and dust purification. This series of dust filter bags includes various needle felt materials for normal, anti-static, oil-water repellent and high-temperature working conditions. It can work together with Dust Collector Filter and Air compressor filter to realize graded filtration for cement, steel, waste incineration, asphalt mixing and power plant flue gas treatment.
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Product Introduction
Our dust filter bag is widely used in pulse bag dust collectors, with a complete range of filter media to match diverse industrial dust and flue gas conditions. Matched with Dust Collector Filter, Air compressor filter and other supporting filter elements, it builds a reliable dust removal system. Multiple needle felt materials are available, including ordinary polyester, oil & water repellent, anti-static, fiberglass, PPS, aramid, P84, FMS and Metamax high-temperature filter media, as well as PTFE membrane coated materials. Different filter fabrics feature excellent properties such as easy dust release, acid & alkali resistance, abrasion resistance, static prevention, high temperature resistance and anti-fouling, suitable for low, medium and high temperature flue gas from various production lines.
Working Principle
Dust-laden flue gas enters the baghouse, and dust particles are trapped on the outer surface of the dust filter bag while clean gas passes through the felt fabric and flows into the clean air chamber. As dust accumulates on the bag surface, the system triggers pulse jet back-blowing. Compressed air bursts into the inner side of the filter bag, shaking off the dust cake, and the dust falls into the ash hopper. The filter bag restores its permeability and keeps continuous filtration. The PTFE membrane coated version blocks fine dust from penetrating deep into the fiber layer, effectively preventing clogging and extending service life.
Filter Media Types & Features
Ordinary Polyester Needle Felt Easy dust release needle felt improves air permeability, reduces dust adhesion and operating resistance. It has uniform and smooth surface for easy dust shedding, high porosity, good air permeability, acid resistance and abrasion resistance. It is the most widely used nonwoven filter material for general dust removal.
Oil & Water Repellent Needle Felt Special auxiliary treatment forms a barrier on fiber surfaces to stop water and oil from penetrating. Oil and water droplets roll off the surface easily. It features great oil rejection, water repellency, anti-adhesion and dust stripping performance.
Anti-static Needle Felt Conductive fiber yarns are blended into the base fabric to dissipate static electricity. It avoids static spark risks and is used for combustible and explosive dust working conditions.
FMS High Temperature Needle Felt Composite felt based on fiberglass fiber, compounded with multiple imported high-temperature fibers and chemically treated. It is easy-clean, water-proof, oil-proof, corrosion-resistant and anti-static. It works stably from 80℃ to 400℃. It can withstand high dust load with filtration speed up to 1–1.5 m/min. Widely used in steel plant, blast furnace flue gas, carbon black, cement, electric furnace, thermal power, waste incineration, ferroalloy and asphalt mixing industries.
Metamax High Temperature Needle Felt Metamax refers to NOMEX from DuPont and CONEX from Teijin. It features high temperature resistance, stable dimension and good acid & alkali resistance. It is popular in chemical, carbon black, steel smelting, cement, asphalt and concrete mixing industries.
Fiberglass Needle Felt High-performance new high-temperature filter material with high temperature resistance, corrosion resistance, stable dimension and low elongation. It has high porosity and low gas flow resistance, suitable for high-speed and high-efficiency flue gas filtration. It is relatively brittle and not resistant to folding.
PPS High Temperature Needle Felt Continuous operating temperature: 190–210℃. It performs well in acid resistance, alkali resistance and hydrolysis resistance, while its anti-oxidation performance is limited. It cannot be used in high oxygen environments. Typical applications include waste incineration power plants, industrial boilers and coal-fired furnaces.
Aramid High Temperature Needle Felt Excellent heat resistance and flame retardancy, good processability and dimensional stability. It can endure 200℃ continuous flue gas and instant temperature up to 250℃.
P84 High Temperature Needle Felt Working temperature range 260–300℃, good chemical resistance, high air permeability and high filtration efficiency, with relatively high cost. Mainly used in asphalt mixing, cement kiln, waste incinerator, fluidized bed boiler and coal-fired industries.
PTFE Membrane Coated Filter Material Expanded PTFE microporous membrane is laminated on the filter fabric. It prevents fine dust from penetrating into the fiber depth and avoids clogging. The pore size of PTFE membrane is below 3 μm. It captures 97–99% of 0.01–1.0 μm dust and total dust efficiency reaches 99.99%. It also has good water repellency to avoid filter failure caused by condensation and greatly prolong service life.
Key Advantages
Rich material options, covering normal temperature, medium temperature and ultra-high temperature flue gas conditions.
Customized anti-static, oil-water repellent, acid-resistant and anti-corrosion types for special hazardous dust.
PTFE membrane coated option provides ultra-high efficiency for submicron fine dust.
Stable dimensional stability, low elongation under hot flue gas, not easy to bag shrinkage.
Good air permeability, low pressure drop, stable pulse cleaning performance.
Compatible with most domestic and international pulse baghouses.
Application Scope
Cement plant, steel mill, blast furnace smelting, thermal power plant, waste incineration, asphalt mixing station, carbon black, ferroalloy, electric furnace, chemical industry, coal-fired boiler, concrete mixing and other flue gas dust removal processes.
Installation & Maintenance
Check the surface for damage before installation and match the snap band / collar tightly to prevent air leakage.
Control flue gas temperature strictly within the allowable range of the selected filter material.
Regularly inspect pulse jet system to ensure normal dust cleaning.
Replace the filter bag timely when obvious damage, perforation or permanent blockage occurs.
Cooperate with Dust Collector Filter and Air compressor filter for upstream protection to reduce fine dust load and extend service life.
FAQs
Q1: What is the difference between PTFE membrane coated filter bag and ordinary felt bag?
A: PTFE membrane coated filter bag traps dust on the membrane surface, much easier to clean and has far higher efficiency for ultra-fine dust. Ordinary felt relies on deep filtration and is easier to clog.
Q2: Which filter bag should I choose for waste incineration flue gas?
A: PPS needle felt is the mainstream choice for waste incineration boilers with low oxygen content. P84 or FMS is selected for higher temperature.
Q3: What filter bag is suitable for explosive dust?
A: Anti-static polyester needle felt is required to prevent static discharge and explosion risk.
Q4: What is the maximum temperature that P84 filter bag can withstand?
A: Continuous working temperature up to 260–300℃.
Q5: Can dust filter bags work with self-cleaning air filter systems?
A: Yes, they can be matched as secondary filtration with Dust Collector Filter and Air compressor filter for multi-stage air purification.
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