Nomex Needle Felt Dust Filter Bag
Material:Nomex Needle FeltFilter Type:
Car Fitment: /
Size: Available Upon Request
Color Customers\' Require
Package: Customized/Neutral
Filtration Efficiency: H13,H14
Sample: Avialable/Free
Place of Origin: CHINA
Nomex Needle Felt Dust Filter Bag
Nomex Needle Felt Dust Filter Bag is a kind of high-temperature flue gas filter material made by needle punching of Nomex fiber, also known as Metas dust filter bag. Nomex Needle Felt Dust Filter Bag is widely used in various high-temperature flue gas filtration occasions, with excellent performance, and is widely used in steel, electric power, and asphalt mixing industries.
Nomex Needle Felt Dust Filter Bag adopts optimized technology to improve various physical and chemical properties of the product and make the application better.
Nomex Needle Felt Dust Filter Bag can be operated continuously at a temperature of 204°C (instant temperature 250°C) and can withstand repeated 250°C instantaneous temperature fluctuations. At the same time, it has outstanding dimensional stability. At a temperature of 250°C, it is only less than 1% heat shrinkage rate, high temperature stability of Nomex Needle Felt Dust Filter Bag. Nomex Needle Felt Dust Filter Bag has good chemical resistance. Low concentrations of acids and alkalis and most hydrocarbons will not affect it, and even a small amount of fluoride will not corrode it significantly.
Application of Nomex Needle Felt Dust Filter Bag
Can be widely used in the field of high temperature filtration, long-term use can maintain high strength and high performance; used in asphalt, cement, steel, non-ferrous metals, lime, dust, metallurgy, drying, gravel, gypsum, plastic, carbon black, coke, Shipbuilding, tobacco and other industries.
Nomex Needle Felt Dust Filter Bag has the following four distinctive features:
1. Excellent temperature resistance: It can be operated continuously at a temperature of 204°C (an instantaneous temperature of 250°C), and can withstand repeated instantaneous temperature fluctuations of 250°C.
2. Good chemical resistance: low concentration of acid and alkali and most hydrocarbons will not affect it, even a small amount of fluoride will not corrode obviously.
3. Outstanding dimensional stability: only less than 1% thermal shrinkage rate at 250℃, with high temperature stability.
4. Proud fire resistance: it starts to decompose and carbonize at 400℃, and its oxygen index is 30. It does not spontaneously combust or support combustion.
The dust collector bag is the heart of the dust collector. As an important dust removal accessory for the bag filter, the Nomex Needle Felt Dust Filter Bag daily maintenance precautions are as follows:
1. The old cloth bags of new technology should not be mixed to avoid different damage time from affecting the normal operation of dust removal equipment.
2. Blow the replaced cloth bag with compressed air first, and then check whether there are any holes. After the holes are repaired, keep them for replacement. If the cloth bag is stuck with dust, rinse it with water, let it dry and save it for replacement.
3. Try to set the cleaning cycle to be longer, which can reduce the outlet pressure and increase its stability. In response to this situation, you can call the technical maintenance department of the dust collector manufacturer to listen to their opinions and suggestions. The problem is not very big, and if you pay more attention, you can get it out of production.
4. For wear and tear, you need to pay attention to the air flow when you use it. If it is larger, you need to increase the automatic flow control system, which can make the machine work more stably and reduce the uneven air intake. And the addictive makes the bag perforate or break.
5. There is a distance between the dust bag and the keel, you need to pay attention to the burrs on the keel, and be careful to puncture the bag. If the ambient temperature is relatively high, you need to change the bag in time after a long time, because holes may occur. And the cloth bag should not be hung too loosely or too tightly. Too loose and easy to accumulate dust, and too tight to be easily damaged.
6. The aging of cloth bags. Mainly due to the following reasons, it is necessary to investigate the cause, take elimination measures and replace the dust filter bag.
① Hardening and shrinking due to abnormal high temperature;
②Reaction due to contact with acid, alkali or organic solvent vapor;
③ It reacts with moisture.
7. Clogging of the dust bag. When the cloth bag is clogged, the resistance can be expressed by the increase in the reading of the differential pressure gauge. The clogging of the cloth bag is the main reason for the phenomenon of cloth bag wear, perforation and falling off. For the cause of the clogging of the dust bag, check and repair according to the following table. The following measures are generally taken:
①Temporarily strengthen dust removal to eliminate clogging of cloth bags;
②Change the cloth bag partially or completely;
③Adjust the installation and operating conditions.
Performance parameters of Nomex Needle Felt Dust Filter Bag
Knowledge extension
1. Metas dust bag is because these dust-containing flue gas dust is not suitable for electrostatic precipitator collection due to the limitation of specific resistance, and can only be collected by cloth bag or other methods;
2. If the temperature of dust-laden flue gas needs to be lowered to below 150℃, Metas dust bag has a higher investment or is restricted by the site;
3. Metas dust bag is because the dust-containing flue gas contains sulfur components, and the dust-containing flue gas has an acid "dew point", which can only be filtered and separated at a higher temperature than the acid dew point. It is necessary to have a chemical fiber that can withstand higher temperatures to make the filter material. METAMAX fiber belongs to aromatic polyamide fiber. In addition to the spinnability and properties of polyester fiber, it is characterized by good heat resistance, flame resistance and infusibility. The fiber oxygen index can be 29%, which is unnatural. When the temperature is above 400°C, the fiber is slowly carbonized. In addition, METAS fiber also has good dimensional stability. Compared with glass fiber, its performance and bending resistance are unmatched by glass fiber. Therefore, it has high temperature resistance and long service life, making it an ideal filter material for bag filter in current high-temperature filtering occasions.
Nomex Needle Felt Dust Filter Bag is a kind of high-temperature flue gas filter material made by needle punching of Nomex fiber, also known as Metas dust filter bag. Nomex Needle Felt Dust Filter Bag is widely used in various high-temperature flue gas filtration occasions, with excellent performance, and is widely used in steel, electric power, and asphalt mixing industries.
Nomex Needle Felt Dust Filter Bag adopts optimized technology to improve various physical and chemical properties of the product and make the application better.
Nomex Needle Felt Dust Filter Bag can be operated continuously at a temperature of 204°C (instant temperature 250°C) and can withstand repeated 250°C instantaneous temperature fluctuations. At the same time, it has outstanding dimensional stability. At a temperature of 250°C, it is only less than 1% heat shrinkage rate, high temperature stability of Nomex Needle Felt Dust Filter Bag. Nomex Needle Felt Dust Filter Bag has good chemical resistance. Low concentrations of acids and alkalis and most hydrocarbons will not affect it, and even a small amount of fluoride will not corrode it significantly.
Application of Nomex Needle Felt Dust Filter Bag
Can be widely used in the field of high temperature filtration, long-term use can maintain high strength and high performance; used in asphalt, cement, steel, non-ferrous metals, lime, dust, metallurgy, drying, gravel, gypsum, plastic, carbon black, coke, Shipbuilding, tobacco and other industries.
Nomex Needle Felt Dust Filter Bag has the following four distinctive features:
1. Excellent temperature resistance: It can be operated continuously at a temperature of 204°C (an instantaneous temperature of 250°C), and can withstand repeated instantaneous temperature fluctuations of 250°C.
2. Good chemical resistance: low concentration of acid and alkali and most hydrocarbons will not affect it, even a small amount of fluoride will not corrode obviously.
3. Outstanding dimensional stability: only less than 1% thermal shrinkage rate at 250℃, with high temperature stability.
4. Proud fire resistance: it starts to decompose and carbonize at 400℃, and its oxygen index is 30. It does not spontaneously combust or support combustion.
The dust collector bag is the heart of the dust collector. As an important dust removal accessory for the bag filter, the Nomex Needle Felt Dust Filter Bag daily maintenance precautions are as follows:
1. The old cloth bags of new technology should not be mixed to avoid different damage time from affecting the normal operation of dust removal equipment.
2. Blow the replaced cloth bag with compressed air first, and then check whether there are any holes. After the holes are repaired, keep them for replacement. If the cloth bag is stuck with dust, rinse it with water, let it dry and save it for replacement.
3. Try to set the cleaning cycle to be longer, which can reduce the outlet pressure and increase its stability. In response to this situation, you can call the technical maintenance department of the dust collector manufacturer to listen to their opinions and suggestions. The problem is not very big, and if you pay more attention, you can get it out of production.
4. For wear and tear, you need to pay attention to the air flow when you use it. If it is larger, you need to increase the automatic flow control system, which can make the machine work more stably and reduce the uneven air intake. And the addictive makes the bag perforate or break.
5. There is a distance between the dust bag and the keel, you need to pay attention to the burrs on the keel, and be careful to puncture the bag. If the ambient temperature is relatively high, you need to change the bag in time after a long time, because holes may occur. And the cloth bag should not be hung too loosely or too tightly. Too loose and easy to accumulate dust, and too tight to be easily damaged.
6. The aging of cloth bags. Mainly due to the following reasons, it is necessary to investigate the cause, take elimination measures and replace the dust filter bag.
① Hardening and shrinking due to abnormal high temperature;
②Reaction due to contact with acid, alkali or organic solvent vapor;
③ It reacts with moisture.
7. Clogging of the dust bag. When the cloth bag is clogged, the resistance can be expressed by the increase in the reading of the differential pressure gauge. The clogging of the cloth bag is the main reason for the phenomenon of cloth bag wear, perforation and falling off. For the cause of the clogging of the dust bag, check and repair according to the following table. The following measures are generally taken:
①Temporarily strengthen dust removal to eliminate clogging of cloth bags;
②Change the cloth bag partially or completely;
③Adjust the installation and operating conditions.
Performance parameters of Nomex Needle Felt Dust Filter Bag
| Needle felt ingredients | Aromatic polysulfone amide fiber | |
| Gram weight (g/m2) | 500 | |
| Thickness (mm) | 2.0 | |
| Air permeability（m3/m2/min） | 17 | |
| Breaking strength N/5cm | Vertical | 1200 |
| Horizontal | 1000 | |
| Continuous working temperature (℃) | 204 | |
| Short-time working temperature (℃) | 250 | |
| Filter wind speed (m/min) | 1.5 | |
| Acid resistance | Good | |
| Alkali resistance | Good | |
| Post-processing method | Calendering/singeing/Teflon coating | |
Knowledge extension
1. Metas dust bag is because these dust-containing flue gas dust is not suitable for electrostatic precipitator collection due to the limitation of specific resistance, and can only be collected by cloth bag or other methods;
2. If the temperature of dust-laden flue gas needs to be lowered to below 150℃, Metas dust bag has a higher investment or is restricted by the site;
3. Metas dust bag is because the dust-containing flue gas contains sulfur components, and the dust-containing flue gas has an acid "dew point", which can only be filtered and separated at a higher temperature than the acid dew point. It is necessary to have a chemical fiber that can withstand higher temperatures to make the filter material. METAMAX fiber belongs to aromatic polyamide fiber. In addition to the spinnability and properties of polyester fiber, it is characterized by good heat resistance, flame resistance and infusibility. The fiber oxygen index can be 29%, which is unnatural. When the temperature is above 400°C, the fiber is slowly carbonized. In addition, METAS fiber also has good dimensional stability. Compared with glass fiber, its performance and bending resistance are unmatched by glass fiber. Therefore, it has high temperature resistance and long service life, making it an ideal filter material for bag filter in current high-temperature filtering occasions.
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