 |
| Material: | |
|---|---|
| Weight: | |
| Max Temperature: | |
| Emission Standards: | |
FIS-RSFBS
FISolution
Reverse-air filter bags are suspended from the filter housing at the closed top end, and fastened to the head plate at their open bottom end. During filtration, dust-laden gas enters the filter bag from below. As it travels upwards the gas also flows towards the outside, while dust collects on the inside of the filter bag. To remove the filter cake, the compartment to be cleaned is separated out from the filtration process (taken off-line). A backwash fan then creates a counterflow, causing the filter bag to partially collapse. To prevent total collapse, support rings are sewn along the edge of the filter bag at set intervals. After cleaning, the compartment is brought back into the filtration process (taken on-line).
Benefits
Large filter bag dimensions (diameter up to 300 mm, length up to 12,000 mm)
Quasi-continuous operation
For high exhaust gas volumes
Basis weight is usually between 400 - 450 g/m²
Types of Revers-air Filter bags for Filter Bag Construction
We offer quality replacement filters for virtually all types and brands of dust collectors.
Alkali-free glass fiber coated PTFE membrane filter bag
The product has the following characteristics:
(1) High filtering accuracy
The microporous membrane on the surface of the glass fiber bulk-coated filter bag has small and uniform pores (0.10-2.0μm), which can separate all dust larger than the diameter of the micropore, and PM10 (respirable dust) and PM2, which seriously harm human health .5 (respirable dust) can be fully captured. Therefore, the fume purification efficiency is high and stable, and it can achieve the emission standard of less than 10mg / m³.
(2) Thin, soft and easy to clean
Filter material thickness is 0.8mm, only 1/3 of felt filter material, soft texture. The filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small, the number of dust removal times is small, and the dust removal cycle is prolonged, which can effectively reduce the consumption of compressed air, reduce maintenance and save operating costs. The base material of the glass fiber bulk-coated filter bag is a two-dimensional glass fiber bulk filter cloth. Due to its structural characteristics, the system's running resistance is more stable than the three-dimensional filter material.
(3) High strength and low elongation, stable dimensions
The fiberglass bulk-coated filter bag has no warp and weft strength, and it is several times more than ordinary felt filter materials. Therefore, it is more suitable for making filter bags with larger long diameters (more than 6 meters in length); It will not shrink at high temperature, almost maintain its original size, and will not affect the gap between the filter bag and the skeleton, ensuring the dust removal effect. The elongation rate of glass fiber filter bag is less than 3%. During the filtering operation, the weight of the filter material plus the weight of the dust layer will not cause the filter bag to extend, and it also greatly reduces the periodic damage to the filter bag caused by air pressure dust cleaning. .
(4) Outstanding temperature resistance
The glass-fiber coated filter can run continuously above the acid dew point to 260 ° C, and can withstand a high temperature of 280 ° C for 2 hours. The glass fiber bulk-coated filter material is baked in an oven at 280 ° C for 2 hours. The physical and chemical indicators are unchanged, and the color is unchanged, which is not available in other filter materials.
(5) Resistant to oxidation and corrosion
Glass fiber bulk-coated filter bag will not be oxidized by oxygen or nitride, so there is no need to consider the problem of high and low oxygen content in the dust collector. The corrosion resistance of glass fiber is outstanding, and after the whole filter material is impregnated with PTFE, PTFE will form a dense protective film on the surface of the glass fiber, so the MA301 filter bag is less eroded during operation.
(6) Water and oil repellent, suitable for working conditions with high moisture content
Glass fiber has very good hydrolysis resistance and belongs to the first-class hydrolysis-resistant fiber. On this basis, the glass fiber substrate was treated with PTFE film. After application testing, its waterproof rating is above 4.5, which eliminates the filter material's water absorption and effectively reduces the phenomenon of condensation after dew condensation.
High Silicon Oxide (Modified) Membrane Filter BagWeight (g/m2) | 470±15 | |
Material | PTFE Micro-porous membrane/Non-alkali glass fiber | |
Weave Pattern | 1/3Twill | |
Finish | Resist Acid | |
Tensile Strength(N/5×20cm) | Warp | ≥2000 |
Weft | ≥1000 | |
tensile elongation(%) | Warp | ＜10 |
Weft | ＜6 | |
Air permeability (cm3/cm2/s·200pa) | ±15 | |
running tempertuare(℃) | Con. | ≤260 |
Peak. | ＜280 | |
velocity of filtration(m/min) | ＜0.8 | |
Treatment | PTFE dipping | |
inoxidizability | Excellent |
The nitride resistance | Excellent |
corrosion resistance | Excellent |
Hydrolysis resistance (grade)
| A grade |
waterproofing grade | ≥4.0grade |
High Silicon Oxide (Modified) Membrane Filter Bag
The product has the following characteristics:
1) High filtering accuracy
The micropores on the surface of the high-silica (modified) membrane-coated filter bag are small and uniform (0.10-2.0μm), which can separate all dusts larger than the diameter of the micropores, and PM10 (respirable dust) and PM2, which seriously harm human health. .5 (respirable dust) has a very high collection efficiency. Therefore, the dust purification efficiency is high and stable, and it is easy to achieve the emission standard of less than 20mg / m³.
(2) Thin, soft and easy to clean
The thickness of the filter material is about 0.8mm, which is only 1/3 of the felt filter material. It is woven with bulky yarn and has a soft texture. The filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small and the number of dust removal times is low, which effectively reduces the consumption of compressed air, reduces maintenance and saves operating costs.
(3) High strength and low elongation, stable dimensions
The high-silicone (modified) membrane-coated filter bag has a warp and weft strength of more than 2300N / 5 × 20cm. It will not shrink at high temperatures, almost maintain its original size, and will not affect the filtering and dust removal effects. The elongation rate of acid-resistant high-silicone filter bag is less than 3%. During the filtering operation, the self-weight of the filter material plus the weight of the dust layer will not cause the filter bag to elongate, and it also greatly reduces the periodicity of the filter bag caused by air pressure dust removal. Break.
(4) Outstanding temperature resistance
The high-silicone (modified) membrane-coated filter bag can continuously run from above the acid dew point to 260 ° C, with an instant temperature resistance of 280 ° C. For instantaneous hot particles and Mars, the filter material will not burn or burn. The acid-resistant high-silicone coated filter material is baked in an oven at 280 ° C for 2 hours. The physical and chemical indicators and color are basically unchanged, which is not available in other filter materials.
(5) Resistant to oxidation and corrosion
High-silica (modified) membrane-coated filter bags are not oxidized by oxygen or nitrides, so there is no need to consider the high and low oxygen content of the dust collector. The high-silica (modified) membrane-coated filter bag has outstanding corrosion resistance, and after the entire filter material is impregnated with PTFE, PTFE will form a dense protective film on the surface of the high-silica (modified) membrane-filter bag, so High-silicone (modified) membrane-coated filter bags suffer little erosion during operation.
(6) Excellent folding resistance
The high-silicone (modified) membrane-coated filter bag substrate is made of ultra-fine high-silicone fiber, and then processed through scientific chemical post-processing. The expansion movement will not cause damage to the filter material and ensure the service life of the filter material.
(7) Water and oil repellent, suitable for working conditions with high moisture content
The high-silicone (modified) membrane-coated filter bag has very good hydrolysis resistance. The substrate has been treated with water and oil repellent technology. After application testing, the waterproof level is not less than 4.5, which excludes the filter material's water absorption. Effectively reduce the phenomenon of compaction after dew condensation.
(8) Adapt to anti-blowing conditions
The use of high-silicone (modified) membrane-coated filter bags is not affected by changes in working conditions, and there are no strict requirements on the chemical composition, dust particle size, moisture content, etc. of soot and collected products.
Technical data sheet for High silicon oxide (modified) membrane filter bag
Item No. | Item | Unit | Specification | |
1 | Material | High silicon oxide | ||
2 | Finishing | Sing,calendered,、PTFEdippig,Heat set、PTFE membrane | ||
3 | Con.Temperature | ℃ | ≤260 | |
4 | Peak.Temperature | ℃ | ≤280 | |
5 | Weight | g/m2 | 760±25 | |
6 | Thickness | mm | 0.8±0.3 | |
7 | Breaking strength | Warp | daN/5×20cm | ≥3000 |
Weft | daN/5×20cm | ≥3000 | ||
8 | Elongation | Warp | ％ | ≤10 |
Weft | ％ | ≤10 | ||
9 | Air permeability | cm3/cm2.s | 3-6 | |
10 | Dust emission concentration | mg/m3 | ≤20 | |
11 | USing year | year | 3 | |
12 | Material of thread | PTFE | ||
Alloy ferrosilicon back-blow glass fiber cloth bag
Feature 1: Outstanding temperature resistance
Our company chooses domestic alkali-free glass fiber raw materials. The alkali-free glass fiber has a temperature resistance above 260 ℃, and the medium alkali glass fiber is only 220 ℃. The glass fiber filter material thus produced can be continuously operated between the acid dew point and 260 ° C. FN215 filter material is baked in an oven at 280 ° C for 2 hours, the physical and chemical indicators remain unchanged, and the color does not change, which is not available in other filter materials.
Feature 2: high strength and resistance to folding
The warp and weft strength of FN215 woven filter material has not been damaged by needle punching. It is several times more than ordinary felt filter material. Because of its high strength, it can be processed into 10m or even 12m long filter bags. The bottom will not shrink, almost maintain the original size, will not affect the gap between the filter bag and the skeleton, to ensure the dust removal effect. The elongation rate of the glass fiber filter bag is less than 8%. During the filtering operation, the weight of the filter material plus the weight of the dust layer will not cause the filter bag to extend, and it also greatly reduces the periodic damage caused by the air pressure dust cleaning to the filter bag. .
FN215 woven filter material uses monofilament ultra-thin glass fiber with a diameter of 3.8-5.0 μm as the raw material. The smaller the single fiber diameter of the glass fiber, the better the folding resistance, and the longer the service life of the manufactured filter material.
We have concluded through experiments that 5.0 μm glass fiber has a 2.5 times higher folding resistance than 9 μm glass fiber (below); and 3.8 μm glass fiber has a folding resistance more than 5 times that of 9 μm glass fiber. In other words, from the perspective of folding resistance, the service life of the glass fiber with a diameter of 3.8 μ and a diameter of 9 μm, respectively, after being made into a filter bag will differ by 15-20 times
Feature 3: oxidation and corrosion resistance
At room temperature, FN215 woven filter material is resistant to organic and inorganic acids, and maintains good performance and stability in weak bases. After experimental test analysis, the acid resistance of the FN215 woven filter developed by our company is many times higher than that of ordinary glass fiber filter;
FN215 woven filter material will not be oxidized by oxygen or nitride, so there is no need to consider the high and low oxygen content in the dust collector. Therefore, the oxidation resistance and corrosion resistance of glass fiber are outstanding, and the entire filter material is impregnated with PTFE emulsion. The PTFE emulsion impregnation will form a dense protective film on the surface of the glass fiber, so the FN215 woven filter material filter bag is in the process of dust removal equipment operation. Erosion is minimal.
Feature 4: good water resistance
Our FN215 woven filter material adopts a unique process in the post-treatment method. The FN215 woven filter material produced has very good waterproof performance at normal temperature and high temperature, which is more conducive to the application of FN215 woven filter material in cement working conditions. The filter material is very waterproof. Not only the waterproof level can reach 3.5 at normal temperature, but also the waterproof level can reach 4 at high temperature.
Filter material thickness is about 0.9mm, only 1/3 of felt filter material, soft texture. The filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small, the number of dust removal times is small, and the dust removal cycle is prolonged, which can effectively reduce the consumption of compressed air, reduce maintenance and save operating costs. The base material of FN215 woven filter material is two-dimensional FN215 filter cloth. Due to its structural characteristics, the system's running resistance is more stable than that of three-dimensional filter material.
Feature 5: easy to clean gray, low resistance
In addition, due to the special self-cleaning and hydrophobic properties of PTFE (polytetrafluoroethylene), the filter material is easy to ash, and at the same time, the dust will not penetrate into the filter material, so it can ensure the airflow flux without increasing the running resistance. It is an ideal high temperature flue gas filter material.
The pores on the surface of the FN215 woven filter material are small and uniform (0.10-2.0μm), which can separate all dust larger than the diameter of the pores. It is different from the deep filtering mechanism of ordinary filter materials through the filter layer. Surface filtration by membrane. The following figure is a schematic diagram of two different filtration mechanisms for ordinary filter materials and filters. As can be seen from the figure, the filtering mechanism on the surface of the filter material can almost trap all the dust in the dust-containing airflow, so the filter material has a very high filtering efficiency.
Feature 6: high filtering accuracy
In summary, the FN215 woven filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small and the number of dust removal times is small, which effectively reduces the consumption of compressed air and saves operating costs. As long as it has an ideal air distribution and a reasonably designed ash cleaning system, the pressure difference of the FN215 woven filter material during the operation is very stable, and the system resistance increases very slowly after long-term operation.
FN215 woven filter surface filtration has the following characteristics:
Improve the interception rate of fine dust and reduce dust emissions;
Improve the dust removal ability of the filter bag, low resistance and low pressure difference;
Durable and prolong the service life of the filter bag;
Reduce fan energy consumption;
Increase ventilation;
Ability to overcome accidents and be regenerated;
Reduce filter material blocking caused by dust accumulation in filter material.
(2) The key elements of FN215 to achieve high filtering accuracy
The key element to achieve high filtration accuracy-weft yarn expansion
The FN215 woven filter weft is treated with a special bulking process, the fiber structure is more fluffy, the fabric structure is thicker, the fiber gaps are denser, increasing the surface area, prolonging the dust collection time, beneficial for fine dust aggregation, the powder layer structure is fluffy, and the porosity , The holes are more uniform, the dust removal effect is better, and the resistance is smaller. Compared with ordinary glass fiber filter material, weft yarn adopts puffing technology with the following characteristics:
Under the same weight, the thickness of bulky yarn filter cloth is thicker;
The air permeability of bulk yarn filter cloth is better than that of ordinary filter cloth, and the uniformity is good;
Good filtering performance, bulky yarn and large surface area, which are conducive to interception, diffusion, static electricity, gravity, inertia and other effects, and capture dust;
After the bulk yarn filter cloth is post-processed, the wetting agent is easy to "wrap" on the surface of the single fiber to form a protective film;
Expanded yarn filter cloth is beneficial to the composite of substrate and film, and improves the fastness.
The key element to achieve high filtration accuracy-PTFE microporous membrane
Our company uses polytetrafluoroethylene resin imported from DuPont of the United States or Daikin of Japan. The ePTFE film produced has a smooth surface, chemical resistance, uniform and fine pore size, high porosity, and uniform air permeability. At the same air permeability, the film thickness value is large and resistant to Good abrasiveness, long service life, high filtration efficiency, good film fastness, can withstand 8kg of spray pressure without film release, and the application rate of the microporous film is less than 5% after practical application.
Tested by an electron microscope, the spider web-like microporous structure on the surface of the microporous film has a pore size of between 0.1 and 2 μm, a thickness of about 15 μm, and a porosity of about 85%, reaching 1 × 109 / cm2. The later FN215 woven filter media has high filtration accuracy, which further ensures the realization of the "ultra-low emission" standard for flue gas.
The key element to achieve ultra-low emissions-sewing of filter bags
Filter bag sewing conforms to industry standards HJ / T326-2006, GB / T 12625 and other related regulations. Cutting with CNC slitting machine, the size is stable without deviation; the sewing is controlled by a continuous production line, the product quality is better and more stable; the upper and lower pieces of the bag body are flat, and the bag mouth and the bottom of the bag are evenly folded in half. The bag body is sewn with high-strength PTFE thread or glass fiber thread to prevent open thread caused by corrosion; strictly follow the ISO9001: 2008 quality management system standard to guide and manage each process of production, and establish the concept of total quality management.
Reverse-air filter bags are suspended from the filter housing at the closed top end, and fastened to the head plate at their open bottom end. During filtration, dust-laden gas enters the filter bag from below. As it travels upwards the gas also flows towards the outside, while dust collects on the inside of the filter bag. To remove the filter cake, the compartment to be cleaned is separated out from the filtration process (taken off-line). A backwash fan then creates a counterflow, causing the filter bag to partially collapse. To prevent total collapse, support rings are sewn along the edge of the filter bag at set intervals. After cleaning, the compartment is brought back into the filtration process (taken on-line).
Benefits
Large filter bag dimensions (diameter up to 300 mm, length up to 12,000 mm)
Quasi-continuous operation
For high exhaust gas volumes
Basis weight is usually between 400 - 450 g/m²
Types of Revers-air Filter bags for Filter Bag Construction
We offer quality replacement filters for virtually all types and brands of dust collectors.
Alkali-free glass fiber coated PTFE membrane filter bag
The product has the following characteristics:
(1) High filtering accuracy
The microporous membrane on the surface of the glass fiber bulk-coated filter bag has small and uniform pores (0.10-2.0μm), which can separate all dust larger than the diameter of the micropore, and PM10 (respirable dust) and PM2, which seriously harm human health .5 (respirable dust) can be fully captured. Therefore, the fume purification efficiency is high and stable, and it can achieve the emission standard of less than 10mg / m³.
(2) Thin, soft and easy to clean
Filter material thickness is 0.8mm, only 1/3 of felt filter material, soft texture. The filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small, the number of dust removal times is small, and the dust removal cycle is prolonged, which can effectively reduce the consumption of compressed air, reduce maintenance and save operating costs. The base material of the glass fiber bulk-coated filter bag is a two-dimensional glass fiber bulk filter cloth. Due to its structural characteristics, the system's running resistance is more stable than the three-dimensional filter material.
(3) High strength and low elongation, stable dimensions
The fiberglass bulk-coated filter bag has no warp and weft strength, and it is several times more than ordinary felt filter materials. Therefore, it is more suitable for making filter bags with larger long diameters (more than 6 meters in length); It will not shrink at high temperature, almost maintain its original size, and will not affect the gap between the filter bag and the skeleton, ensuring the dust removal effect. The elongation rate of glass fiber filter bag is less than 3%. During the filtering operation, the weight of the filter material plus the weight of the dust layer will not cause the filter bag to extend, and it also greatly reduces the periodic damage to the filter bag caused by air pressure dust cleaning. .
(4) Outstanding temperature resistance
The glass-fiber coated filter can run continuously above the acid dew point to 260 ° C, and can withstand a high temperature of 280 ° C for 2 hours. The glass fiber bulk-coated filter material is baked in an oven at 280 ° C for 2 hours. The physical and chemical indicators are unchanged, and the color is unchanged, which is not available in other filter materials.
(5) Resistant to oxidation and corrosion
Glass fiber bulk-coated filter bag will not be oxidized by oxygen or nitride, so there is no need to consider the problem of high and low oxygen content in the dust collector. The corrosion resistance of glass fiber is outstanding, and after the whole filter material is impregnated with PTFE, PTFE will form a dense protective film on the surface of the glass fiber, so the MA301 filter bag is less eroded during operation.
(6) Water and oil repellent, suitable for working conditions with high moisture content
Glass fiber has very good hydrolysis resistance and belongs to the first-class hydrolysis-resistant fiber. On this basis, the glass fiber substrate was treated with PTFE film. After application testing, its waterproof rating is above 4.5, which eliminates the filter material's water absorption and effectively reduces the phenomenon of condensation after dew condensation.
High Silicon Oxide (Modified) Membrane Filter BagWeight (g/m2) | 470±15 | |
Material | PTFE Micro-porous membrane/Non-alkali glass fiber | |
Weave Pattern | 1/3Twill | |
Finish | Resist Acid | |
Tensile Strength(N/5×20cm) | Warp | ≥2000 |
Weft | ≥1000 | |
tensile elongation(%) | Warp | ＜10 |
Weft | ＜6 | |
Air permeability (cm3/cm2/s·200pa) | ±15 | |
running tempertuare(℃) | Con. | ≤260 |
Peak. | ＜280 | |
velocity of filtration(m/min) | ＜0.8 | |
Treatment | PTFE dipping | |
inoxidizability | Excellent |
The nitride resistance | Excellent |
corrosion resistance | Excellent |
Hydrolysis resistance (grade)
| A grade |
waterproofing grade | ≥4.0grade |
High Silicon Oxide (Modified) Membrane Filter Bag
The product has the following characteristics:
1) High filtering accuracy
The micropores on the surface of the high-silica (modified) membrane-coated filter bag are small and uniform (0.10-2.0μm), which can separate all dusts larger than the diameter of the micropores, and PM10 (respirable dust) and PM2, which seriously harm human health. .5 (respirable dust) has a very high collection efficiency. Therefore, the dust purification efficiency is high and stable, and it is easy to achieve the emission standard of less than 20mg / m³.
(2) Thin, soft and easy to clean
The thickness of the filter material is about 0.8mm, which is only 1/3 of the felt filter material. It is woven with bulky yarn and has a soft texture. The filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small and the number of dust removal times is low, which effectively reduces the consumption of compressed air, reduces maintenance and saves operating costs.
(3) High strength and low elongation, stable dimensions
The high-silicone (modified) membrane-coated filter bag has a warp and weft strength of more than 2300N / 5 × 20cm. It will not shrink at high temperatures, almost maintain its original size, and will not affect the filtering and dust removal effects. The elongation rate of acid-resistant high-silicone filter bag is less than 3%. During the filtering operation, the self-weight of the filter material plus the weight of the dust layer will not cause the filter bag to elongate, and it also greatly reduces the periodicity of the filter bag caused by air pressure dust removal. Break.
(4) Outstanding temperature resistance
The high-silicone (modified) membrane-coated filter bag can continuously run from above the acid dew point to 260 ° C, with an instant temperature resistance of 280 ° C. For instantaneous hot particles and Mars, the filter material will not burn or burn. The acid-resistant high-silicone coated filter material is baked in an oven at 280 ° C for 2 hours. The physical and chemical indicators and color are basically unchanged, which is not available in other filter materials.
(5) Resistant to oxidation and corrosion
High-silica (modified) membrane-coated filter bags are not oxidized by oxygen or nitrides, so there is no need to consider the high and low oxygen content of the dust collector. The high-silica (modified) membrane-coated filter bag has outstanding corrosion resistance, and after the entire filter material is impregnated with PTFE, PTFE will form a dense protective film on the surface of the high-silica (modified) membrane-filter bag, so High-silicone (modified) membrane-coated filter bags suffer little erosion during operation.
(6) Excellent folding resistance
The high-silicone (modified) membrane-coated filter bag substrate is made of ultra-fine high-silicone fiber, and then processed through scientific chemical post-processing. The expansion movement will not cause damage to the filter material and ensure the service life of the filter material.
(7) Water and oil repellent, suitable for working conditions with high moisture content
The high-silicone (modified) membrane-coated filter bag has very good hydrolysis resistance. The substrate has been treated with water and oil repellent technology. After application testing, the waterproof level is not less than 4.5, which excludes the filter material's water absorption. Effectively reduce the phenomenon of compaction after dew condensation.
(8) Adapt to anti-blowing conditions
The use of high-silicone (modified) membrane-coated filter bags is not affected by changes in working conditions, and there are no strict requirements on the chemical composition, dust particle size, moisture content, etc. of soot and collected products.
Technical data sheet for High silicon oxide (modified) membrane filter bag
Item No. | Item | Unit | Specification | |
1 | Material | High silicon oxide | ||
2 | Finishing | Sing,calendered,、PTFEdippig,Heat set、PTFE membrane | ||
3 | Con.Temperature | ℃ | ≤260 | |
4 | Peak.Temperature | ℃ | ≤280 | |
5 | Weight | g/m2 | 760±25 | |
6 | Thickness | mm | 0.8±0.3 | |
7 | Breaking strength | Warp | daN/5×20cm | ≥3000 |
Weft | daN/5×20cm | ≥3000 | ||
8 | Elongation | Warp | ％ | ≤10 |
Weft | ％ | ≤10 | ||
9 | Air permeability | cm3/cm2.s | 3-6 | |
10 | Dust emission concentration | mg/m3 | ≤20 | |
11 | USing year | year | 3 | |
12 | Material of thread | PTFE | ||
Alloy ferrosilicon back-blow glass fiber cloth bag
Feature 1: Outstanding temperature resistance
Our company chooses domestic alkali-free glass fiber raw materials. The alkali-free glass fiber has a temperature resistance above 260 ℃, and the medium alkali glass fiber is only 220 ℃. The glass fiber filter material thus produced can be continuously operated between the acid dew point and 260 ° C. FN215 filter material is baked in an oven at 280 ° C for 2 hours, the physical and chemical indicators remain unchanged, and the color does not change, which is not available in other filter materials.
Feature 2: high strength and resistance to folding
The warp and weft strength of FN215 woven filter material has not been damaged by needle punching. It is several times more than ordinary felt filter material. Because of its high strength, it can be processed into 10m or even 12m long filter bags. The bottom will not shrink, almost maintain the original size, will not affect the gap between the filter bag and the skeleton, to ensure the dust removal effect. The elongation rate of the glass fiber filter bag is less than 8%. During the filtering operation, the weight of the filter material plus the weight of the dust layer will not cause the filter bag to extend, and it also greatly reduces the periodic damage caused by the air pressure dust cleaning to the filter bag. .
FN215 woven filter material uses monofilament ultra-thin glass fiber with a diameter of 3.8-5.0 μm as the raw material. The smaller the single fiber diameter of the glass fiber, the better the folding resistance, and the longer the service life of the manufactured filter material.
We have concluded through experiments that 5.0 μm glass fiber has a 2.5 times higher folding resistance than 9 μm glass fiber (below); and 3.8 μm glass fiber has a folding resistance more than 5 times that of 9 μm glass fiber. In other words, from the perspective of folding resistance, the service life of the glass fiber with a diameter of 3.8 μ and a diameter of 9 μm, respectively, after being made into a filter bag will differ by 15-20 times
Feature 3: oxidation and corrosion resistance
At room temperature, FN215 woven filter material is resistant to organic and inorganic acids, and maintains good performance and stability in weak bases. After experimental test analysis, the acid resistance of the FN215 woven filter developed by our company is many times higher than that of ordinary glass fiber filter;
FN215 woven filter material will not be oxidized by oxygen or nitride, so there is no need to consider the high and low oxygen content in the dust collector. Therefore, the oxidation resistance and corrosion resistance of glass fiber are outstanding, and the entire filter material is impregnated with PTFE emulsion. The PTFE emulsion impregnation will form a dense protective film on the surface of the glass fiber, so the FN215 woven filter material filter bag is in the process of dust removal equipment operation. Erosion is minimal.
Feature 4: good water resistance
Our FN215 woven filter material adopts a unique process in the post-treatment method. The FN215 woven filter material produced has very good waterproof performance at normal temperature and high temperature, which is more conducive to the application of FN215 woven filter material in cement working conditions. The filter material is very waterproof. Not only the waterproof level can reach 3.5 at normal temperature, but also the waterproof level can reach 4 at high temperature.
Filter material thickness is about 0.9mm, only 1/3 of felt filter material, soft texture. The filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small, the number of dust removal times is small, and the dust removal cycle is prolonged, which can effectively reduce the consumption of compressed air, reduce maintenance and save operating costs. The base material of FN215 woven filter material is two-dimensional FN215 filter cloth. Due to its structural characteristics, the system's running resistance is more stable than that of three-dimensional filter material.
Feature 5: easy to clean gray, low resistance
In addition, due to the special self-cleaning and hydrophobic properties of PTFE (polytetrafluoroethylene), the filter material is easy to ash, and at the same time, the dust will not penetrate into the filter material, so it can ensure the airflow flux without increasing the running resistance. It is an ideal high temperature flue gas filter material.
The pores on the surface of the FN215 woven filter material are small and uniform (0.10-2.0μm), which can separate all dust larger than the diameter of the pores. It is different from the deep filtering mechanism of ordinary filter materials through the filter layer. Surface filtration by membrane. The following figure is a schematic diagram of two different filtration mechanisms for ordinary filter materials and filters. As can be seen from the figure, the filtering mechanism on the surface of the filter material can almost trap all the dust in the dust-containing airflow, so the filter material has a very high filtering efficiency.
Feature 6: high filtering accuracy
In summary, the FN215 woven filter material has a serpentine jitter during dust removal, and the dust is easy to peel off. The dust removal pressure is small and the number of dust removal times is small, which effectively reduces the consumption of compressed air and saves operating costs. As long as it has an ideal air distribution and a reasonably designed ash cleaning system, the pressure difference of the FN215 woven filter material during the operation is very stable, and the system resistance increases very slowly after long-term operation.
FN215 woven filter surface filtration has the following characteristics:
Improve the interception rate of fine dust and reduce dust emissions;
Improve the dust removal ability of the filter bag, low resistance and low pressure difference;
Durable and prolong the service life of the filter bag;
Reduce fan energy consumption;
Increase ventilation;
Ability to overcome accidents and be regenerated;
Reduce filter material blocking caused by dust accumulation in filter material.
(2) The key elements of FN215 to achieve high filtering accuracy
The key element to achieve high filtration accuracy-weft yarn expansion
The FN215 woven filter weft is treated with a special bulking process, the fiber structure is more fluffy, the fabric structure is thicker, the fiber gaps are denser, increasing the surface area, prolonging the dust collection time, beneficial for fine dust aggregation, the powder layer structure is fluffy, and the porosity , The holes are more uniform, the dust removal effect is better, and the resistance is smaller. Compared with ordinary glass fiber filter material, weft yarn adopts puffing technology with the following characteristics:
Under the same weight, the thickness of bulky yarn filter cloth is thicker;
The air permeability of bulk yarn filter cloth is better than that of ordinary filter cloth, and the uniformity is good;
Good filtering performance, bulky yarn and large surface area, which are conducive to interception, diffusion, static electricity, gravity, inertia and other effects, and capture dust;
After the bulk yarn filter cloth is post-processed, the wetting agent is easy to "wrap" on the surface of the single fiber to form a protective film;
Expanded yarn filter cloth is beneficial to the composite of substrate and film, and improves the fastness.
The key element to achieve high filtration accuracy-PTFE microporous membrane
Our company uses polytetrafluoroethylene resin imported from DuPont of the United States or Daikin of Japan. The ePTFE film produced has a smooth surface, chemical resistance, uniform and fine pore size, high porosity, and uniform air permeability. At the same air permeability, the film thickness value is large and resistant to Good abrasiveness, long service life, high filtration efficiency, good film fastness, can withstand 8kg of spray pressure without film release, and the application rate of the microporous film is less than 5% after practical application.
Tested by an electron microscope, the spider web-like microporous structure on the surface of the microporous film has a pore size of between 0.1 and 2 μm, a thickness of about 15 μm, and a porosity of about 85%, reaching 1 × 109 / cm2. The later FN215 woven filter media has high filtration accuracy, which further ensures the realization of the "ultra-low emission" standard for flue gas.
The key element to achieve ultra-low emissions-sewing of filter bags
Filter bag sewing conforms to industry standards HJ / T326-2006, GB / T 12625 and other related regulations. Cutting with CNC slitting machine, the size is stable without deviation; the sewing is controlled by a continuous production line, the product quality is better and more stable; the upper and lower pieces of the bag body are flat, and the bag mouth and the bottom of the bag are evenly folded in half. The bag body is sewn with high-strength PTFE thread or glass fiber thread to prevent open thread caused by corrosion; strictly follow the ISO9001: 2008 quality management system standard to guide and manage each process of production, and establish the concept of total quality management.
