Products
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Polyester Filter Bags
Based on the provided search resources, here is a comprehensive summary of polyester filter bags:1. Materials and Characteristics
- Materials: Polyester filter bags are primarily made from polyester staple fibers or filaments, processed through needle-punching, weaving, or other techniques. Some products undergo post-treatment such as heat setting, singeing, calendering, PTFE impregnation, or water/oil repellent finishes to enhance performance.
- Key Features:
- Excellent Filtration: High porosity and 透气性 ensure efficient dust collection (e.g., 208 polyester flannel bags achieve a dust removal rate of 99.99%).
- Durability: High abrasion resistance and long service life; smooth surfaces facilitate easy ash cleaning, reducing dust adhesion and operational resistance.
- Temperature Resistance: Continuous operating temperature typically ranges from 80°C to 130°C (depending on the product model), with a short-term peak temperature of up to 150°C.
- Chemical Tolerance: Moderate resistance to acids and alkalis, suitable for various industrial environments.
2. Classification and Types
- By Raw Material:
- Polyester Staple Fiber Filter Bags: Good breathability, suitable for general dust removal.
- Polyester Filament Filter Bags: Higher strength and longer lifespan.
- By Weaving Method:
- Woven Filter Bags: Tightly structured, suitable for high-temperature and high-pressure environments (e.g., 208 polyester woven filter bags).
- Needle-Punched Felt Filter Bags: High porosity and superior filtration efficiency, making them the mainstream choice.
- By Function:
- Anti-Static Filter Bags: Incorporate anti-static fibers to prevent electrostatic accumulation, ideal for explosive dust environments.
- Water and Oil Repellent Filter Bags: Surface-treated to resist water and oil penetration, suitable for wet or oily dust.
- Membrane Filter Bags: Combined with microporous membranes to enhance capture of fine particles.
3. Technical Parameters (Typical Product Example)
- Fiber Composition: Polyester staple fiber
- Base Cloth Composition: Polyester filament
- Grammage: 500g/m²
- Thickness: 1.70mm
- Tensile Strength: Warp ≥1200N/5cm, Weft ≥1500N/5cm
- Air Permeability: 14 m³/㎡·min
- Continuous Operating Temperature: 130°C (some products specify 80°C; confirm with specific specifications)
- Short-Term Peak Temperature: 150°C
4. Application Fields
Polyester filter bags are widely used in:- Heavy Industries: Dust removal systems in steel, power, cement, chemical, and smelting industries.
- Environmental Equipment: Bag dust collectors for treating industrial dusty gases.
- Other Fields: Petroleum, mining, waste incineration, pharmaceuticals, food processing, and other scenarios requiring filtration.
5. Usage Precautions
- Installation and Maintenance:
- Ensure smooth water distribution systems and uniform filter media 铺装.
- Avoid overly loose or tight filter bags to prevent dust accumulation or damage.
- Regularly inspect filter bags for wear and replace damaged ones promptly.
- Temperature Control:
- Avoid prolonged operation above the rated temperature; short-term peaks should not exceed 150°C.
- In high-temperature and high-humidity environments, use water/oil repellent or membrane filter bags to prevent condensation and clogging.
- Airflow Adjustment:
- Ensure uniform air intake to avoid localized impact damage to filter bags.
- For high-flow conditions, equip automatic flow control systems to stabilize gas volume.
6. Conclusion
Polyester filter bags are a mainstream choice in industrial dust removal and filtration due to their excellent filtration efficiency, durability, and adaptability. Selection should consider specific working conditions (e.g., temperature, dust properties, humidity), and proper installation and maintenance are crucial to ensure efficient operation and extend service life. -
PPS/PTFE650 filter bag
The PPS/PTFE650 filter bag features the following specifications:
- Material: Fiber composed of PPS+PTFE, scrim (base fabric) made of PTFE.
- Physical Properties:
- Weight: 650 g/㎡ (compliant with ISO 9073-1).
- Thickness: 1.6 mm.
- Air Permeability: 150–250 l/㎡·s@200Pa (per ISO 9237).
- Mechanical Performance:
- Tensile Strength (ISO 9073-3, sample size 200/50mm): Warp ≥1100N, Weft ≥900N.
- Tensile Elongation (ISO 9073-3): Warp <35%, Weft <45%.
- Thermal Properties:Surface Treatment: Includes singe, calendering, heat setting, and PTFE dipping processes.
- Working Temperature: Continuous use at 190℃, instant tolerance at 220℃.
- Heat Shrinkage: 3% at 220℃.
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FILTER BAG：POLYAMIDE (PI) NEEDLEFELT
we have polyester and high temperature resistance filter sleeve/filter bagsneedle felt, punch felt, singe, calendaring, heat settingTypes:Anti-static, water&oilresistance, PTFE membrance
Item Standard Metric Value Imperial Value Area Weight EN12127 550±25g/m² 16.3±0.75oz/yd² Thickness EN ISO 9073/2 2.0±0.2mm 0.079±0.007in Composition — Fiber: Polyamide (PI)
Scrim: PTFE— Finish — Heat-set, Calender, Surface Treatment with PTFE Bath — Property Index Standard Longitudinal Cross Tensile Strength (5×20cm) GB/T 3923.1-2013 ≥900N ≥1200N Elongation GB/T 3923.1-2013 ≤35% ≤50% Thermal Stability (Shrinkage at 260℃ 24h) GB/T 6719-2009 ≤1.5% ≤1% Air Permeability (at 200Pa) GB/T 5453 100-180 l/dm²·min — Fiber Properties and Operating Temperature
- Fiber Properties: Polyamide (PI)/PTFE
- Operating Temperature (Dry):
- Continuous: 260℃ Max (500℉ Max)
- Peaks: 280℃ Max (536℉ Max)
Remarks
- All data are expressed as typical values. This technical data is subject to change.
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FILTER CLOTH :WOVEN-FIBER GLASS w PTFE Membrane
we have polyester and high temperature resistance filter sleeve/filter bagsneedle felt, punch felt, singe, calendaring, heat settingTypes:Anti-static, water&oilresistance, PTFE membrance
item Standard Parameter value AREA WEIGHT（面积重量） EN12127 750±22.5g/m²（19.08±0.65oz/yd²） THICKNESS（厚度） EN ISO 9073/2 0.7-1.1mm（0.027–0.043in） WEAVE（编织方式） — DOUBLE TWILL（双斜纹） FINISH（后整理） — PTFE MEMBRANE（覆 PTFE 膜） TENSILE STRENGTH（拉伸强度，5×20cm） GB/T 3923.1-2013 ≥3400N（另有≥2400N 未明确标准） ELONGATION（伸长率） GB/T 3923.1-2013 ≤8% THERMAL STABILITY（热稳定性，260℃ 2h 收缩率） GB/T 6719-2009 ≤1.5%（另有≤1% 未明确标准） AIR PERMEABILITY（透气率，200Pa） GB/T 5453 12-54 l/dm²min OPERATING TEMPERATURE（工作温度，干燥） — CONTINUOUS（连续）：260℃Max（500℉Max）
PEAKS（峰值）：280℃Max（536℉Max）Please contact us if necessary
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ust removal filter frame is the key component of industrial dust removal equipment
Dust removal filter frame is the key component of industrial dust removal equipment (such as bag dust collector, filter filter, etc.), the main role includes the following aspects:
Support filter medium
Provide structural support for filter bags, filter elements and other filter materials to ensure that they maintain a stable shape under the impact of air flow, avoid collapse or deformation, so as to maintain normal filtration function.
Uniformly distributed airflow
Through a reasonable frame design, the dust air flow is guided evenly through the filter medium, avoiding the local air flow too fast or too slow, improving the filtration efficiency and extending the service life of the filter material.
Protective filter medium
Reduce direct friction or collision between the filter medium and other parts of the equipment, especially in high wind speeds or environments with high dust concentrations, the frame prevents the filter material from being damaged due to mechanical stress.
Easy to maintain and replace
The frame structure is usually designed to be removable or modular, which facilitates the installation, disassembly and replacement of filter media, and reduces the difficulty and cost of equipment maintenance.
Enhanced system stability
As the skeleton of the dust removal equipment, the frame bears the weight of the filter unit and ensures that the entire system maintains structural stability under different working conditions (such as temperature changes, pressure fluctuations).
Optimized sealing performance
Part of the frame design combined with the sealing structure can effectively prevent the leakage of unfiltered dusty gas and ensure the overall tightness and filtration effect of the dust removal system.
In short, the dust removal filter frame ensures the efficient and stable operation of the dust removal equipment by supporting and protecting the filter medium and optimizing the airflow distribution, and is an indispensable part of the industrial dust removal system. -
Environmental defender：PTFE filter bag
Details about PTFE filter bag finishing:
First, material characteristics
High temperature resistance: continuous operation at 240 ° C, instant resistance to 260 ° C high temperature.
Corrosion resistance: Almost all acid and alkali resistance, organic solvents and chemical corrosion, chemical stability is very high.
Low friction coefficient: smooth surface, good self-moistening, not easy to adhere to impurities, easy to clean.
Other characteristics: UV resistance, no moisture absorption, but the wear resistance is general, the filter bag frame requires high finish.
2. Technical parameters (Take mainstream products as an example)
Fiber/substrate: 100% PTFE
Square gram weight: 750g/m²
Thickness: 1.1mm
Air permeability: 90-100L/㎡·min
Fracture strength: longitudinal and transverse ≥450N/5cm
Thermal shrinkage rate: 3% shrinkage at 260℃ for 90 minutes
Continuous operating temperature: 240℃, instant temperature 260℃
3. Application fields
Industrial flue gas treatment: coal-fired boilers, waste incineration, carbon black production, titanium dioxide production, etc.
Chemical industry: Filter acids, alkalis, solvents and corrosive chemicals.
Pharmaceutical and Food: Purification of pharmaceuticals, clarification of beverages/dairy products, solid-liquid separation in food processing.
Environmental protection: sewage treatment, waste gas treatment, air purification.
Electronics industry: high purity gas/liquid filtration, clean room air purification.
Other: petrochemical, paint, ink, resin production, etc.
4. Analysis of advantages and disadvantages
Advantages:
Chemical stability and high temperature resistance in extreme environments.
High filtration accuracy (up to 0.1-100 microns), high efficiency.
Long service life, relatively low maintenance costs.
Cons:
The cost is high and the initial investment is large.
Poor wear resistance, pay attention to the filter bag frame finish.
Five, use and installation precautions
Before installation:
Check whether the filter bag is damaged and clean the surface of dust and impurities.
Make sure the filter bag fits the frame tightly to avoid leaks.
In use:
Control the temperature below 260 ° C to avoid high temperature deformation.
Prevent the impact of high-speed air flow, reduce the vibration damage of filter bag.
When dealing with low temperature and high humidity gas, anti-condensation measures (such as heating and dehumidifying) are required.
Maintenance:
Check the wear of the filter bag regularly and replace it in time.
Use an electric vacuum cleaner and avoid washing.
Keep dry and ventilated when storing away from direct sunlight. -
The following are successful application cases of dust filter bags in different industries
The following are successful application cases of dust filter bags in different industries, demonstrating their efficient dust removal performance and environmental value:
1. Mining industry: efficient control of dust pollution
Iron ore crushing section: a large mining enterprise in the crushing and screening links to introduce cloth bag dust collector, through the needle felt filter bag to capture fine dust, dust emission concentration is reduced to the national standard, improve the working environment, reduce the risk of occupational diseases.
Gold mine tailings treatment: gold mine enterprises use customized filter bags to treat the dust in the tailings transportation, combined with the pulse ash cleaning system, dust capture rate of more than 99%, effectively protect the surrounding ecological environment, enhance the enterprise environmental protection image.
2. High temperature industry: cope with complex conditions
Glass manufacturing: A glass factory uses coated PTFE needled felt filter bags to treat high temperature flue gas (260 ° C), which not only achieves dust emission concentration below 10mg/m³, but also reduces the filter bag replacement frequency and reduces maintenance costs by 30%.
Coal-fired boiler: A power plant uses aramid based filter bag, stable operation in high temperature and high humidity environment, PM2.5 capture efficiency of 99.99%, helping to achieve ultra-low emission goal.
3. Building materials and chemical industry: breaking through technical barriers
Cement factory: Spina felt filter bag developed by a company in Jiangsu improves filtration accuracy through high-pressure water flow process, reducing dust emission from 50mg/m³ to less than 10mg/m³, and increasing material utilization rate by 20%, breaking foreign technology monopoly.
Chemical reactor: A chemical plant uses PTFE coated filter bags to treat the tail gas containing corrosive gases, and the filter bag life is extended to more than 3 years, while achieving efficient recovery of catalyst powder.
4. Agriculture and people’s livelihood: Meet the needs of special scenarios
Straw crushing: The cloth bag energy-saving vacuum cleaner developed by Zhoukou enterprises is applied to the peanut seedling crushing equipment, which completely solves the problem of dust pollution, has been certified by the national patent, and is called “dust removal magic weapon” by farmers.
Cigarette production: A cigarette factory in Chongqing has extended the replacement cycle of the filter bag by 50% by reforming the anti-clogging device of the pressure differential meter pressure tube combined with the anti-corrosion filter bag, and the transformation cost of a single set of equipment is only 8 yuan.
5. Environmental technology innovation: intelligent upgrade
Quarry comprehensive application: A quarry in the crushing, screening, transportation links to deploy intelligent bag dust removal system, real-time monitoring of filter bag status through the pressure sensor, combined with AI algorithm to optimize the cleaning cycle, dust concentration reduced by 80%, equipment operating efficiency increased by 25%.
Circular economy practice: An environmental protection company in Xiamen developed a high-temperature silicone sealing process, which increased the service life of the filter bag to 4 years, successfully applied to a number of large projects at home and abroad (such as Turkey waste incineration plant), and the material loss rate was reduced from 2% to 1%.
Sum up
Through material innovation (such as PTFE, arnylon, spina felt) and intelligent design, dust filter bags have achieved significant results in mining, electric power, chemical industry, agriculture and other fields, not only to meet the requirements of environmental regulations, but also to reduce costs and increase efficiency for enterprises. In the future, with the development of filter bag technology in the direction of high precision, long life and intelligence, its application scenarios will be further expanded to help achieve the goal of global carbon neutrality. -
The use of dust filter bag
Dust filter bag is the core component of industrial dust removal system, mainly used to capture and separate dust particles in the air, to ensure the production environment clean and efficient operation of equipment. The following are typical application scenarios and key advantages:
1. Application field
Steel/Metallurgy: electric furnace, blast furnace dust removal, capture metal oxide dust
Chemical: reaction kettle tail gas treatment, filter catalyst powder
Electricity: coal-fired boiler flue gas treatment, to achieve PM2.5 emission standards
Building materials: cement kiln tail dust removal, control particulate emission concentration
Food and medicine: sterile workshop air purification, to ensure the cleanliness of the production environment
2. Core strengths
High efficiency filtration: Using needle felt/film coating process, filtration efficiency of 99.99%
Energy saving and consumption reduction: stable air permeability, reduce the system operating resistance
High temperature resistance: can withstand 260℃ continuous operation (such as glass fiber material)
Long life design: corrosion resistance, wear resistance, life of 2-4 years
Environmental protection features: Support dust recycling, meet the requirements of carbon neutrality
3. Select recommendations
Choose the material according to the working condition: such as PPS for sulfur-containing smoke, PTFE for strong acid environment
Attention to filtration accuracy: sub-micron dust needs to select microporous membrane composite filter material
Matching cleaning method: It is recommended to select filter material with strong folding resistance in pulse cleaning system
4. Maintain key points
Check the damage regularly to avoid powder leakage affecting the system efficiency
Control inlet dust concentration, prolong service life
Clean up the residual dust in time during shutdown to prevent compaction
Modern industrial dust removal systems are developing intelligentiously, some filter bags have integrated pressure sensors, which can monitor the filter status in real time, and optimize the cleaning cycle with AI algorithms to further improve operating efficiency. -
How does the Venturi tube in the filter bag cage affect the performance of the dust pump system?
The Venturi tube in the filter bag cage affects the performance of the dust pump system in the following ways:
Improving Dust Removal Efficiency
- Enhanced Dust Detachment: During the pulse – jet cleaning process, the Venturi tube causes the high – pressure air from the blowpipe to accelerate as it passes through the narrow throat section. This acceleration creates a negative pressure zone, which induces a large amount of surrounding air to be sucked into the filter bag. The combined effect of the high – pressure air and the induced air causes the filter bag to expand and contract rapidly, generating strong vibrations. These vibrations are highly effective in dislodging dust particles adhered to the filter bag surface, even those that are difficult to remove, thereby improving the overall dust removal efficiency of the system.
- Thorough Cleaning of Filter Bags: The Venturi – induced air flow helps to ensure a more uniform cleaning of the filter bags. The air is distributed evenly throughout the filter bag, preventing uneven cleaning and reducing the likelihood of dust build – up in certain areas. This thorough cleaning helps to maintain the filtration performance of the filter bags over time, allowing them to continue to effectively capture dust particles and prevent dust from escaping into the atmosphere.
Reducing Energy Consumption
- Efficient Use of Compressed Air: The Venturi tube enables the dust pump system to achieve a significant cleaning effect with a relatively small amount of high – pressure compressed air. By inducing a large volume of surrounding air, it supplements the cleaning air volume, reducing the reliance on a large – volume supply of high – pressure air. This efficient use of compressed air helps to lower the energy consumption of the air compressor that supplies the compressed air, resulting in energy savings for the entire dust pump system.
- Optimized Cleaning Cycles: Due to the enhanced dust removal efficiency provided by the Venturi tube, the frequency of cleaning cycles can be reduced. The filter bags remain clean for longer periods, requiring less frequent activation of the pulse – jet cleaning system. This reduction in the number of cleaning cycles further contributes to energy savings, as each activation of the cleaning system consumes a certain amount of energy.
Protecting the Filter Bags and System Components
- Reduced Mechanical Stress on Filter Bags: The gentle yet effective cleaning action of the Venturi – enhanced air flow helps to reduce the mechanical stress on the filter bags. The even distribution of air and the controlled expansion and contraction of the filter bags during cleaning minimize the occurrence of local stress concentrations, which can lead to premature wear and tear of the filter bags. By prolonging the service life of the filter bags, the Venturi tube helps to reduce the frequency of filter bag replacements, thereby reducing maintenance costs and downtime of the dust pump system.
- Prevention of System Clogging: The efficient dust removal achieved by the Venturi tube helps to prevent dust from accumulating and clogging the filter bags, as well as other components of the dust pump system such as the ducts and the dust – collecting hopper. Clogging can lead to increased resistance to air flow, reduced system efficiency, and potential damage to the system. By maintaining a clean and unobstructed flow path, the Venturi tube helps to ensure the smooth operation of the dust pump system and protects its various components from damage caused by dust build – up.
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Can you provide more details about the Venturi tube in the filter bag cage?
Here are the detailed descriptions about the Venturi tube in the filter bag cage:
Structure
- The Venturi tube consists of a convergent section, a throat section, and a divergent section. The convergent section gradually narrows the flow channel of the gas, causing the gas velocity to increase and the pressure to decrease. The throat section is the narrowest part of the Venturi tube, where the gas reaches the maximum velocity and the minimum pressure. The divergent section then gradually expands the flow channel, allowing the gas velocity to decrease and the pressure to recover. In the filter bag cage, the Venturi tube is usually made of stainless steel or other corrosion – resistant materials to ensure its durability and reliability in harsh industrial environments.
Working Principle
- When the pulse – jet cleaning system is activated, high – pressure air is injected into the filter bag through the blowpipe. As the air passes through the Venturi tube, the constricted throat section causes the air to accelerate. According to the principle of conservation of energy, the increase in air velocity leads to a decrease in static pressure, creating a negative pressure zone. This negative pressure zone induces a large amount of surrounding air to be sucked into the filter bag. The combined effect of the high – pressure air from the blowpipe and the induced air causes a rapid expansion and contraction of the filter bag, generating a strong vibration that effectively detaches the dust adhered to the filter bag surface.
Functions
- Enhanced Dust Removal Efficiency: By inducing a large volume of additional air, the Venturi tube significantly increases the air volume and momentum entering the filter bag during the cleaning process. This powerful air flow can more effectively dislodge the dust particles, especially those that are firmly attached to the filter bag, thereby improving the dust removal efficiency and ensuring the cleanliness of the filter bag.
- Reduced Energy Consumption: The Venturi tube enables the use of a relatively small amount of high – pressure air to achieve a large – scale cleaning effect. It utilizes the energy – saving principle of inducing surrounding air, reducing the need for a large amount of high – pressure air supply. This helps to lower the energy consumption of the dust removal system, resulting in significant energy savings and reduced operating costs.
- Uniform Cleaning: The design of the Venturi tube ensures a relatively uniform distribution of the air flow entering the filter bag. This uniformity helps to avoid local over – cleaning or under – cleaning, ensuring that the entire filter bag is cleaned evenly. As a result, the service life of the filter bag is prolonged, and the filtration performance of the dust collector is maintained at a stable level.
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High-Quality Steel Filter Bag Cage with Venturi for Industrial Dust Pump Systems
Structure and Principle
- Structural Composition: It is mainly made of high-quality steel, including longitudinal ribs and support rings. The longitudinal ribs are evenly distributed to provide strength and stiffness, and the support rings maintain the shape of the filter bag. It is also equipped with a Venturi tube, generally installed at the top of the filter bag, and cooperates with the blowpipe.
- Working Principle: The dusty gas enters the bag filter. The dust is intercepted on the outer surface of the filter bag, and the clean gas is discharged through the inside of the filter bag. During dust cleaning, the pulse valve opens, and compressed air is ejected from the blowpipe. Through the Venturi tube, the surrounding air is induced to enter the filter bag, making the filter bag expand sharply in an instant and shake off the dust.
Performance Advantages
- High Strength and Stability: High-quality steel ensures that the filter bag cage can withstand the gas pressure of the filter bag during the filtration and dust cleaning processes, preventing damage and deformation during transportation and installation, and ensuring long-term stable operation.
- Good Corrosion Resistance: Through treatments such as galvanizing, powder coating, and surface silicone spraying, it can resist the corrosion of dust in different industrial environments and extend its service life.
- Efficient Dust Cleaning: The Venturi tube can induce a large amount of surrounding air to enter the filter bag, enhancing the dust cleaning effect, reducing the frequency of dust cleaning, improving the efficiency of the dust collector, and reducing energy consumption.
Application Fields
- Metallurgical Industry: Such as steel plants and non-ferrous metal smelters. A large amount of dust is generated during the processes of ore crushing and smelting, and this equipment can be used for treatment.
- Chemical Industry: In chemical plants, various dusts and harmful particles are generated during the production process. This filter bag cage can effectively filter them to protect the environment and the health of workers.
- Building Materials Industry: In cement plants, stone material plants, etc., during the links of raw material grinding, cement production, and building material processing, this equipment can be used to control dust emissions
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How the water filter bag works？
Working principle
The multi-bag filter introduces the water to be filtered into the filter shell through the pump, and the water enters the filter bag. Under the action of pressure, the water passes through the microhole of the filter bag, and the impurities are trapped in the filter bag, so as to achieve the filtration and purification of water.
Component introduction
Filter bag: Made of polypropylene, with different micron grades, such as 0.2 micron, 5 micron, 10 micron, 100 micron, can be selected according to filtration needs. The lower the micron number, the finer the particles that can be filtered out, and the higher the filtration accuracy.
Multi-bag filter: usually made of corrosion-resistant materials such as stainless steel, it can accommodate multiple filter bags to increase the filtration area and flow rate and improve filtration efficiency.
Material property
Polypropylene (PP) : good chemical stability, acid, alkali, organic solvent resistance; With good mechanical strength and wear resistance, the price is relatively low, cost-effective.
Polyethylene (PE) : strong chemical resistance, good flexibility, can adapt to a certain degree of deformation and vibration; Good low temperature resistance, can still maintain good performance in cold environment.
Polytetrafluoroethylene (PTFE) : has very high chemical stability, almost no reaction with any chemical substances; Excellent resistance to high temperature and low temperature; Smooth surface, not easy to absorb impurities, easy to clean.
Nylon (Nylon) : high strength, good toughness, can withstand greater pressure and tension; High filtration accuracy, can effectively remove fine particles and impurities in water.