Glass fiber bag air filters (also known as glass fiber bag filters) take glass fiber filter material as the core and have the advantages of high temperature resistance, chemical corrosion resistance, high filtration accuracy (mainly medium and high efficiency levels), and large dust holding capacity. They are mainly used in “medium efficiency filtration” or “pre-protection for high efficiency filtration” scenarios in air purification. It is especially suitable for environments with high temperatures, corrosive gases or high cleanliness requirements. Its core application fields can be classified into three major dimensions: “industrial production”, “special manufacturing”, and “public and civilian”, as follows:
I. Industrial production field: Withstand harsh environments and ensure compliance with equipment and emissions
In industrial scenarios, the core value of fiberglass bag filters lies in achieving efficient filtration and equipment protection in high-temperature, corrosive or high-dust environments, preventing dust from affecting production or exceeding emission standards. Typical applications include:
Energy and Power Industry (High-temperature Flue Gas Filtration)
Thermal power plants/waste incineration plants: Flue gas filtration at the tail end of boilers and after the denitration system (SCR). Glass fiber can withstand temperatures up to 250-300℃ (with some special models having even higher temperatures), which can intercept fly ash and unburned carbon particles in flue gas, preventing dust from clogging subsequent desulfurization equipment (such as wet desulfurization towers) or polluting chimney emissions. At the same time, it avoids dust adhering to the surface of heat exchangers and affecting heat exchange efficiency.
Biomass power plant: Flue gas filtration produced by burning biomass fuels such as straw and sawdust. The flue gas contains a large amount of wood ash dust and a small amount of corrosive gases (such as sulfides). The corrosion resistance of fiberglass filter material can reduce the wear of filter bags and ensure that the dust emission meets environmental protection standards (such as GB 13223-2011 “Emission Standard of Air Pollutants for Thermal Power Plants”).
Chemical and petrochemical industry (Filtration of corrosive gases/dust)
Ventilation for chemical reaction vessels: Exhaust or fresh air filtration in acid-base reaction workshops and solvent synthesis workshops. It can intercept the chemical dust generated during the reaction process (such as salt particles, catalyst powder), and at the same time withstand a small amount of acidic gases (such as hydrochloric acid mist, sulfuric acid mist) or alkaline gases (such as ammonia), avoiding corrosion of ventilation ducts or pollution of the outdoor environment.
Petroleum refining/coal chemical industry: Process tail gas filtration in catalytic cracking units and coal-to-olefins workshops. The exhaust gas contains oil and gas dust, coke particles and high-temperature (150-200℃) environment. The fiberglass bag filter can efficiently capture the dust, preventing it from entering the subsequent compressor and separation equipment, thus avoiding equipment wear or a decrease in product purity.
Metallurgy and metal processing Industry (High-temperature Dust Filtration)
Steel plant: Purification of blast furnace gas, filtration of flue gas from converter steelmaking. High-temperature flue gas (200-250℃) contains a large amount of iron oxide dust (such as iron oxide and manganese oxide). Fiberglass filter materials can withstand high temperatures and efficiently intercept dust. The recovered dust can be reused (such as being returned to the blast furnace for ironmaking), while reducing the wear of dust on fans and valves.
Non-ferrous metal smelting (copper, aluminum, zinc) : Flue gas filtration from smelting furnaces. In flue gas containing heavy metal dust (such as copper powder and zinc powder) and high-temperature environments, fiberglass bag filters can achieve efficient dust collection (with a filtration efficiency of over 99%), preventing heavy metal pollution of soil and water sources, and meeting environmental protection requirements.
Ii. Special manufacturing fields: High cleanliness + environmental compatibility to ensure product quality
Such scenarios have high requirements for air cleanliness and may be accompanied by specific environmental conditions (such as high temperature and dryness). Fiberglass bag filters can serve as the “core of medium and high-efficiency filters” or “pre-protection for high-efficiency filters (HEPA/ULPA)”. Typical applications include:
The electronics and semiconductor industry
Chip manufacturing workshop: Clean room ventilation system for photolithography and etching processes. As a pre-filter for HEPA/ULPA, it intercepts dust (0.5-5μm) and fiber impurities in the air, reduces the load on high-efficiency filters, and extends their replacement cycle (HEPA is relatively expensive). Meanwhile, the low dust emission of glass fiber filter material can prevent its own fibers from falling off and contaminating the chip, ensuring the accuracy of photolithography (the smaller the chip line width, the more sensitive it is to dust).
Electronic component packaging: Air filtration in LED and integrated circuit (IC) packaging workshops. Intercept solder dust and resin particles to prevent them from adhering to component pins or the surface of the package, avoiding short circuits or poor packaging (such as bubbles, impurity points).
Pharmaceutical and food industry (Compliance Filtration)
Pharmaceutical factory (sterile/clean area) : Ventilation systems for antibiotic and vaccine production workshops. As a medium-efficiency filtration unit, it intercepts dust and microbial carriers (such as bacteria attached to dust particles) in outdoor fresh air or circulating air within the workshop, providing protection for subsequent high-efficiency filtration (such as in biosafety cabinets and aseptic filling lines). Comply with the requirements of GMP (Good Manufacturing Practice for Pharmaceutical Products) for “airborne particles in clean areas” (for example, the number of particles ≥5μm in D-level clean areas needs to be controlled).
High-temperature food processing: Exhaust air filtration in biscuit baking and milk powder spray drying workshops. During the baking/drying process, high-temperature (120-180℃) dust (such as flour particles and milk powder particles) is generated. The fiberglass filter material can withstand high temperatures and capture the dust, preventing it from being discharged outdoors and causing air pollution. At the same time, it can prevent the dust from entering the workshop air conditioning system and causing cross-contamination.
Aerospace and precision manufacturing
Clean ventilation in the manufacturing workshops of turbine blades and precision bearings for aero engine parts processing. Intercept metal cutting dust (such as titanium alloy and high-temperature alloy debris), prevent dust from adhering to the surface of components and affecting processing accuracy (such as blade smoothness), and at the same time, the oil resistance of glass fiber filter material can adapt to a small amount of cutting oil mist in the workshop, reducing the clogging of filter bags.
Optical instrument manufacturing: Lens and laser device production workshop. Filter out tiny dust particles (0.3-1μm) in the air to prevent them from adhering to the surface of optical lenses, which could lead to a decrease in light transmittance or imaging deviation, and ensure the performance of instruments (such as telescopes and laser printer lenses).
Iii. Public and Civil Sectors: Adapt to specific environmental requirements and enhance the reliability of purification
Although such scenarios do not involve extreme high temperatures or corrosion, they have high requirements for filtration accuracy and filter material stability. Fiberglass bag filters are often used as the “core of medium and high-efficiency purification”, and typical applications include:
Ventilation in medical facilities (high-risk areas)
In hospital operating rooms and ICU (Intensive Care Unit), it serves as a medium-efficiency filter unit for central air conditioning or purification units, intercepting dust, pollen, and droplet residues in fresh air (after primary interception), reducing the load on subsequent high-efficiency filtration (such as HEPA), ensuring the cleanliness of the surgical/treatment environment (for example, operating rooms require a cleanliness level of 10,000 or 100), and lowering the risk of cross-infection.
Biological laboratory: Exhaust air filtration for microbial culture and virus research laboratories. The bioaerosols (such as dust particles attached to bacteria and viruses) generated during the interception experiment can be prevented. The anti-disinfection property of the fiberglass filter material (which can withstand formaldehyde and hydrogen peroxide disinfection) can prevent the growth of microorganisms in the filter bags and stop the emission of harmful biological particles outdoors.
Large public Spaces and data centers
Medium-efficiency filtration of the central air conditioning fresh air system in airport/railway station terminals (high foot traffic and high dust). Compared with ordinary polyester fiber filter materials, glass fiber filter materials have a larger dust-holding capacity, which can reduce the frequency of replacement (suitable for scenarios with large foot traffic and inconvenient replacement), while ensuring the freshness of indoor air. They can intercept sand, poplar catkins, pollen and other substances in outdoor fresh air.
Data center/server room: Medium-efficiency filtration for air conditioning and ventilation systems. Intercept dust and fibers in the air to prevent dust from adhering to precision components such as server motherboards and hard disks, which could cause short circuits or heat dissipation failures. The high-temperature resistance of fiberglass filter material (which can adapt to the environment of 30-40℃ in the computer room during summer) can prevent the filter bags from deforming due to high temperatures and maintain stable filtration efficiency.
Summary: The core application logic of fiberglass bag filters
The essence of the application of fiberglass bag filters is to “provide reliable medium and high-efficiency filtration in specific environments (high temperature, corrosion) or scenarios with high cleanliness requirements”. Its core value is reflected in three points:
Environmental tolerance: Resistant to high temperatures of 200-300℃ and acid and alkali corrosion, suitable for harsh industrial environments, solving the problems of easy deformation and easy wear of common filter materials (such as polyester fibers).
Filtration performance: Medium to high efficiency level (such as F7-F9, H10), capable of effectively intercepting dust ranging from 0.3 to 5μm. It not only meets industrial emission compliance requirements but also provides pre-protection for high-cleanliness scenarios (electronics, pharmaceuticals).
Economy: It has a large dust holding capacity, a longer replacement cycle than ordinary medium-efficiency filters, and lower long-term operating costs. It is particularly suitable for industrial scenarios with high dust and high loads.
When making a selection, it is necessary to match the fiberglass bag filter with the corresponding temperature resistance grade and filter material thickness based on the temperature range of the scene (such as whether it exceeds 200℃), the type of corrosive gas (such as acidic/alkaline), and the filtration accuracy requirements (such as F8 or H10). At the same time, pay attention to the compatibility with downstream high-efficiency filters (to avoid over-filtration or insufficient load).
I. Industrial production field: Withstand harsh environments and ensure compliance with equipment and emissions
In industrial scenarios, the core value of fiberglass bag filters lies in achieving efficient filtration and equipment protection in high-temperature, corrosive or high-dust environments, preventing dust from affecting production or exceeding emission standards. Typical applications include:
Energy and Power Industry (High-temperature Flue Gas Filtration)
Thermal power plants/waste incineration plants: Flue gas filtration at the tail end of boilers and after the denitration system (SCR). Glass fiber can withstand temperatures up to 250-300℃ (with some special models having even higher temperatures), which can intercept fly ash and unburned carbon particles in flue gas, preventing dust from clogging subsequent desulfurization equipment (such as wet desulfurization towers) or polluting chimney emissions. At the same time, it avoids dust adhering to the surface of heat exchangers and affecting heat exchange efficiency.
Biomass power plant: Flue gas filtration produced by burning biomass fuels such as straw and sawdust. The flue gas contains a large amount of wood ash dust and a small amount of corrosive gases (such as sulfides). The corrosion resistance of fiberglass filter material can reduce the wear of filter bags and ensure that the dust emission meets environmental protection standards (such as GB 13223-2011 “Emission Standard of Air Pollutants for Thermal Power Plants”).
Chemical and petrochemical industry (Filtration of corrosive gases/dust)
Ventilation for chemical reaction vessels: Exhaust or fresh air filtration in acid-base reaction workshops and solvent synthesis workshops. It can intercept the chemical dust generated during the reaction process (such as salt particles, catalyst powder), and at the same time withstand a small amount of acidic gases (such as hydrochloric acid mist, sulfuric acid mist) or alkaline gases (such as ammonia), avoiding corrosion of ventilation ducts or pollution of the outdoor environment.
Petroleum refining/coal chemical industry: Process tail gas filtration in catalytic cracking units and coal-to-olefins workshops. The exhaust gas contains oil and gas dust, coke particles and high-temperature (150-200℃) environment. The fiberglass bag filter can efficiently capture the dust, preventing it from entering the subsequent compressor and separation equipment, thus avoiding equipment wear or a decrease in product purity.
Metallurgy and metal processing Industry (High-temperature Dust Filtration)
Steel plant: Purification of blast furnace gas, filtration of flue gas from converter steelmaking. High-temperature flue gas (200-250℃) contains a large amount of iron oxide dust (such as iron oxide and manganese oxide). Fiberglass filter materials can withstand high temperatures and efficiently intercept dust. The recovered dust can be reused (such as being returned to the blast furnace for ironmaking), while reducing the wear of dust on fans and valves.
Non-ferrous metal smelting (copper, aluminum, zinc) : Flue gas filtration from smelting furnaces. In flue gas containing heavy metal dust (such as copper powder and zinc powder) and high-temperature environments, fiberglass bag filters can achieve efficient dust collection (with a filtration efficiency of over 99%), preventing heavy metal pollution of soil and water sources, and meeting environmental protection requirements.
Ii. Special manufacturing fields: High cleanliness + environmental compatibility to ensure product quality
Such scenarios have high requirements for air cleanliness and may be accompanied by specific environmental conditions (such as high temperature and dryness). Fiberglass bag filters can serve as the “core of medium and high-efficiency filters” or “pre-protection for high-efficiency filters (HEPA/ULPA)”. Typical applications include:
The electronics and semiconductor industry
Chip manufacturing workshop: Clean room ventilation system for photolithography and etching processes. As a pre-filter for HEPA/ULPA, it intercepts dust (0.5-5μm) and fiber impurities in the air, reduces the load on high-efficiency filters, and extends their replacement cycle (HEPA is relatively expensive). Meanwhile, the low dust emission of glass fiber filter material can prevent its own fibers from falling off and contaminating the chip, ensuring the accuracy of photolithography (the smaller the chip line width, the more sensitive it is to dust).
Electronic component packaging: Air filtration in LED and integrated circuit (IC) packaging workshops. Intercept solder dust and resin particles to prevent them from adhering to component pins or the surface of the package, avoiding short circuits or poor packaging (such as bubbles, impurity points).
Pharmaceutical and food industry (Compliance Filtration)
Pharmaceutical factory (sterile/clean area) : Ventilation systems for antibiotic and vaccine production workshops. As a medium-efficiency filtration unit, it intercepts dust and microbial carriers (such as bacteria attached to dust particles) in outdoor fresh air or circulating air within the workshop, providing protection for subsequent high-efficiency filtration (such as in biosafety cabinets and aseptic filling lines). Comply with the requirements of GMP (Good Manufacturing Practice for Pharmaceutical Products) for “airborne particles in clean areas” (for example, the number of particles ≥5μm in D-level clean areas needs to be controlled).
High-temperature food processing: Exhaust air filtration in biscuit baking and milk powder spray drying workshops. During the baking/drying process, high-temperature (120-180℃) dust (such as flour particles and milk powder particles) is generated. The fiberglass filter material can withstand high temperatures and capture the dust, preventing it from being discharged outdoors and causing air pollution. At the same time, it can prevent the dust from entering the workshop air conditioning system and causing cross-contamination.
Aerospace and precision manufacturing
Clean ventilation in the manufacturing workshops of turbine blades and precision bearings for aero engine parts processing. Intercept metal cutting dust (such as titanium alloy and high-temperature alloy debris), prevent dust from adhering to the surface of components and affecting processing accuracy (such as blade smoothness), and at the same time, the oil resistance of glass fiber filter material can adapt to a small amount of cutting oil mist in the workshop, reducing the clogging of filter bags.
Optical instrument manufacturing: Lens and laser device production workshop. Filter out tiny dust particles (0.3-1μm) in the air to prevent them from adhering to the surface of optical lenses, which could lead to a decrease in light transmittance or imaging deviation, and ensure the performance of instruments (such as telescopes and laser printer lenses).
Iii. Public and Civil Sectors: Adapt to specific environmental requirements and enhance the reliability of purification
Although such scenarios do not involve extreme high temperatures or corrosion, they have high requirements for filtration accuracy and filter material stability. Fiberglass bag filters are often used as the “core of medium and high-efficiency purification”, and typical applications include:
Ventilation in medical facilities (high-risk areas)
In hospital operating rooms and ICU (Intensive Care Unit), it serves as a medium-efficiency filter unit for central air conditioning or purification units, intercepting dust, pollen, and droplet residues in fresh air (after primary interception), reducing the load on subsequent high-efficiency filtration (such as HEPA), ensuring the cleanliness of the surgical/treatment environment (for example, operating rooms require a cleanliness level of 10,000 or 100), and lowering the risk of cross-infection.
Biological laboratory: Exhaust air filtration for microbial culture and virus research laboratories. The bioaerosols (such as dust particles attached to bacteria and viruses) generated during the interception experiment can be prevented. The anti-disinfection property of the fiberglass filter material (which can withstand formaldehyde and hydrogen peroxide disinfection) can prevent the growth of microorganisms in the filter bags and stop the emission of harmful biological particles outdoors.
Large public Spaces and data centers
Medium-efficiency filtration of the central air conditioning fresh air system in airport/railway station terminals (high foot traffic and high dust). Compared with ordinary polyester fiber filter materials, glass fiber filter materials have a larger dust-holding capacity, which can reduce the frequency of replacement (suitable for scenarios with large foot traffic and inconvenient replacement), while ensuring the freshness of indoor air. They can intercept sand, poplar catkins, pollen and other substances in outdoor fresh air.
Data center/server room: Medium-efficiency filtration for air conditioning and ventilation systems. Intercept dust and fibers in the air to prevent dust from adhering to precision components such as server motherboards and hard disks, which could cause short circuits or heat dissipation failures. The high-temperature resistance of fiberglass filter material (which can adapt to the environment of 30-40℃ in the computer room during summer) can prevent the filter bags from deforming due to high temperatures and maintain stable filtration efficiency.
Summary: The core application logic of fiberglass bag filters
The essence of the application of fiberglass bag filters is to “provide reliable medium and high-efficiency filtration in specific environments (high temperature, corrosion) or scenarios with high cleanliness requirements”. Its core value is reflected in three points:
Environmental tolerance: Resistant to high temperatures of 200-300℃ and acid and alkali corrosion, suitable for harsh industrial environments, solving the problems of easy deformation and easy wear of common filter materials (such as polyester fibers).
Filtration performance: Medium to high efficiency level (such as F7-F9, H10), capable of effectively intercepting dust ranging from 0.3 to 5μm. It not only meets industrial emission compliance requirements but also provides pre-protection for high-cleanliness scenarios (electronics, pharmaceuticals).
Economy: It has a large dust holding capacity, a longer replacement cycle than ordinary medium-efficiency filters, and lower long-term operating costs. It is particularly suitable for industrial scenarios with high dust and high loads.
When making a selection, it is necessary to match the fiberglass bag filter with the corresponding temperature resistance grade and filter material thickness based on the temperature range of the scene (such as whether it exceeds 200℃), the type of corrosive gas (such as acidic/alkaline), and the filtration accuracy requirements (such as F8 or H10). At the same time, pay attention to the compatibility with downstream high-efficiency filters (to avoid over-filtration or insufficient load).
