What are the types of high temperature dust removal bags commonly used in dust collectors?

High-temperature dust bag refers to the dust bag made of filter material made of P84 (polyimide), Nomex (Metas), PPS (polyphenylene sulfide), PTFE (polytetrafluoroethylene), glass fiber, basalt and other high-temperature resistant fibers, the common feature of high-temperature dust bag is that the high temperature resistance is good, the temperature resistance is more than 200 degrees, among which the basalt dust bag with the highest high temperature resistance can reach 350 °, and the high-temperature dust-resistant bag is generally chemically excellent. Among them, PTFE (also known as polytetrafluoroethylene) is the best, which can resist strong corrosion.

The high-temperature dust bag can also learn from each other's strengths and weaknesses through the composite of high-temperature materials, make up for the defects or deficiencies of individual fibers, and greatly improve the comprehensive performance of the product. The composite high-temperature dust removal bag has different characteristics such as high strength, acid and alkali resistance, wear resistance, high temperature resistance, etc., and has been treated by singeing, calendering, impregnation, film lamination and other processes, with high temperature resistance, good chemical resistance, good wear resistance, easy ash cleaning and high filtration accuracy.

Due to the many advantages of high-temperature dust removal bags, they are widely used in the field of dust removal technology today. The specific application fields include steel, cement, metallurgy, thermal power, biomass power generation, waste incineration, boilers, chemical industry and other high-temperature and complex working conditions. Minghui filter bags can provide more detailed information.

High-temperature dust bags commonly used in bag filters:PPS needle felt dust removal cloth bag,Metas dust bag,PTFE dust bagHigh-temperature fiber blended dust bagGlass fiber dust bag (there are many kinds of treatment processes).Others and so on.

The high-temperature filter bag generally requires the filter material to have a temperature resistance of more than 200, and the types commonly used in different working conditions in the market are different, such as needle felt, P84, PTFE, glass fiber composite felt, woven fabric, high silica oxygen coated filter bag, glass fiber woven fabric, etc. However, if you want to achieve ultra-low emission of less than 5 mg, only high silicon-oxygen coated membrane filter bags, which Zhejiang Hongsheng does better.

The temperature of different materials is different, generally around 300 degrees.

Different material cloth bags, can withstand different temperatures, for high temperature corrosion of smoke, to choose a special cloth bag.

There are dozens of materials in the field of dust bags, each material maintains its own unshakable position, because they have their own characteristics, we often say that the high temperature cloth bag room temperature cloth bag, generally below 130 degrees for the normal temperature cloth bag, above 130 degrees for the high temperature dust bag, the large boundary is divided in this way, different in the mine in the temperature and chemical properties of the face of the dust bag requirements are different. The dust bag is the heart of the bag bag, generally known as the dust bag or dust filter bag, the dust bag is a key part of the operation of the bag filter, usually the cylindrical filter bag is hung vertically in the dust collector. The fabric and design of the dust bag should be as efficient as possible, easy to peel off dust, and durable.

The selection of dust bag is very important, it directly affects the dust removal effect of the dust collector, and the selection of dust bag is selected from the following aspects: gas temperature, humidity and chemistry, particle size, dust concentration, filtration wind speed, dust removal method and other factors.

The vibrating screen bag filter is applied at the temperature of 150 degrees.

This needs to be determined according to the material of the dust bag, the dust bag is generally divided into room temperature 80-130 degrees, medium temperature 130-180, high temperature bag at 160-240 degrees, different working conditions with different materials of dust bags.

250℃。

Generally, when the flue gas temperature is lower than 120 and the filter material is required to have acid resistance and durability, polyester flannel cloth and polyester needle felt are often selected; When dealing with high-temperature flue gas (<250), graphitized glass cloth is mainly used; In some special cases, carbon fiber, glass fiber, PPS, P84, DWD, PTFE, fluoromex, basalt filter media, etc. are selected.

Generally, the temperature resistance of polyester filter bags is below 120 degrees, the temperature resistance of PPS filter bags is below 180 degrees, the temperature resistance of PTFE filter bags is below 280 degrees, and the temperature resistance of glass fiber filter bags is below 300 degrees. The most expensive is the PTFE filter bag, which has a long service life due to high temperature resistance, generally about 5 years; Fiberglass filter bags can withstand high temperatures, which is cheap, but has a short service life, generally within 1 year.

Generally speaking, it is said that it can reach 280 degrees, but the real words cannot reach that high. It should be at 240 degrees. Don't believe it when you say that the resistance is so high.

Whether a dust collector bag can be used for a long time is not determined by temperature alone, but also takes into account factors such as acid and alkaline corrosion, whether it will be hydrolyzed, etc. It depends on the working conditions.

It can be up to 280 degrees.

The equipment that separates the dust from the flue gas is called a dust collector or dust removal equipment. The performance of the dust collector is expressed in terms of the amount of gas that can be handled, the loss of resistance as the gas passes through the collector, and the dust collection efficiency. At the same time, the first time of the dust collector, the operation and maintenance costs, the length of service life and the difficulty of operation and management are also important factors to consider its performance.

Dust collectors are commonly used in boilers and industrial production.

It is more economical to operate at a temperature of no higher than 230 degrees.

Looking at the quality of the cloth bag, it can generally be 100 300 degrees.

110-300 degrees depending on the filter bag.

Now there is a kind of ceramic fiber filter element, Aibo fiber, which can remove dust for 1000 high temperature flue gases, reaching ultra-low emissions, less than 5mg m3

The applications of high-temperature dust collector bags are as follows:

P84 needle felt: suitable for coal-fired boilers, liquid bed boilers, waste incineration, asphalt plants, cement plants, waste incinerators, etc.

Flumex: suitable for steel, smelting, ferroalloys, chemicals, cement, calcium carbide, waste incineration, electric power, asphalt mixing, etc.

Metas: suitable for asphalt, cement, steel, non-ferrous metals, lime, dust, metallurgy, plastics, carbon black, coke, tobacco and other industries.

Glass fiber needle felt: suitable for steel, metallurgy, carbon black, power generation, cement, chemical and other high-temperature flue gas industries.

High temperature dust collector cloth bag.

They are: room temperature cloth bag, medium temperature cloth bag, high temperature cloth bag.

1. Room temperature bag: The main material of room temperature bag is made of polyester, polypropylene, acrylic and other fiber materials through non-woven and textile processes, which has good air permeability, smooth surface, good dimensional stability, easy to peel off dust and other superior properties. Its use field is mainly used in general industrial enterprises, dust removal and room temperature flue gas treatment in industries with dust pollution.

2. Medium-temperature cloth bag: With the development of bag dust removal technology in recent years, China has begun to use imported synthetic fibers and developed high-performance filter materials that can adapt to harsh working conditions and have a long service life. At present, the more common medium-temperature filter materials on the market include aramid fibers and PPS series fibers through impregnation, waterproof, oil-proof and anti-corrosion processes, so as to achieve the ideal filtration effect.

3. High-temperature cloth bags: The high-temperature cloth bags commonly used on the market are mainly made of high-temperature resistant fiber materials such as P84, expanded glass fiber, ultra-fine glass fiber through textile and non-woven processes, which are characterized by good thermal stability, high filtration efficiency, long service life and so on. It is mainly used in the dust collector under various high-temperature flue gas conditions, and for the part with harsh working conditions, it is a high-temperature cloth bag made of DWD material, and if it is an ordinary dust collection part, a polyester material cloth bag can be used.

The high dust collection efficiency of the bag filter is inseparable from its dust removal mechanism. When the dust-containing gas enters the ash hopper through the deflector plate through the lower inlet pipe of the dust collector, the coarse-grained dust will fall into the ash hopper due to the collision of the deflector plate and the reduction of gas velocity, and the rest of the fine particle dust enters the filter bag chamber with the gas, and the dust is blocked in the filter bag due to the inertia, diffusion, barrier, hook hanging, static electricity and other effects of the filter material fiber and fabric, and the purified gas escapes out of the bag and is discharged through the exhaust pipe.

The ash on the filter bag is removed by gas backwashing, and the removed dust goes down to the ash hopper and is discharged to the ash conveying device through the double-layer ash discharge valve. The ash on the filter bag can also be removed by the method of spraying pulse air flow, so as to achieve the purpose of ash cleaning, and the removed dust is discharged by the ash discharge device.

The high dust removal efficiency of the bag filter is also inseparable from the filter material, and the performance and quality of the filter material are directly related to the performance and service life of the bag filter. The filter material is the main material for making filter bags, and its performance and quality are to promote the progress of bag dust removal technology, affecting its application range and service life.

The principle of high-temperature dust bag filtration and dust removal is as follows. When the high-temperature flue gas passes through the dust bag. The dust is trapped on the surface of the dust removal filter bag, and the clean gas penetrates the dust removal bag and discharges into the atmosphere.

As the dust accumulates more and more on the surface. Without resistance, it gets bigger and bigger. At this point, the cleaning system comes into working condition.

High compressed air. Blow back the dust bag to clean the ash. The dust on the surface of the bag will shake off to the dust removal ash.

This completes the entire filtration and cleaning process.

The principle of high-temperature dust bag filtration and dust removal is the sieve effect, the dust bag uses the airflow pressure generated by the fan to press the dust-containing air to the surface of the dust bag, and most of the impurities are blocked on the surface of the dust bag. A filter fiber mesh layer is formed, and at the same time, the dusty air through the dust bag enters the second stage filter device through the channels on both sides of the dust bag. The pre-separator can be seen as a type of dust bag filtration.

The advantages of dust bag filtration are the combined effect of short-range capture mechanisms such as less auxiliary equipment, diffusion sedimentation, direct interception, inertial collision and electrostatic adsorption. The management is simple and convenient, and the filtered cotton feast has a high reuse rate, and the filter material such as non-woven fabrics and foam plastics is separated from the air flow.

The principle of high-temperature dust bag filtration is that the dust is adsorbed on the surface of the dust bag under the action of the fan, and the filtration process is completed by cleaning other discharge filter bags!

High temperature resistant dust bag is a filter material used for dust removal in high temperature environment, and its main features and advantages include:

Excellent high temperature resistance: high temperature resistant dust bag can withstand heat and oxidation in high temperature environment, generally can withstand high temperature of more than 250, and some can even reach more than 450, so it can maintain good filtration effect and service life in high temperature occasions.

High filtration efficiency: The high-temperature dust-resistant bag is made of high-quality non-woven materials, which can effectively filter out the fine dust and particles in the air, with high filtration efficiency and can meet many high-precision filtration requirements.

Strong corrosion resistance: The high-temperature resistant dust bag is made of specially treated materials, which can effectively prevent the erosion of chemical substances and ensure its service life and filtration effect.

Wide range of application: high-temperature dust-resistant dust bag is suitable for dust removal in various high-temperature environments, such as electric power, steel, cement, chemical and other industrial fields, as well as dust removal requirements in some high-temperature special environments.

High safety: The high-temperature dust-resistant cloth bag is made of non-toxic, harmless and environmentally friendly materials, which can be used safely and will not cause harm to the human body and the environment.

In general, high-temperature dust-resistant bags have the advantages of high-temperature resistance, high-efficiency filtration, corrosion resistance, wide application range and high safety, so they are widely used in the field of dust removal in high-temperature environments.

High temperature resistance: special chemical synthetic fiber material is used, which has good high temperature resistance and can be used for a long time in a high temperature environment.

Corrosion resistance: The material has good chemical stability and corrosion resistance, and can adapt to the treatment of a variety of acid and alkaline exhaust gases.

High filtration efficiency: The surface of the bag is smooth, the filtration efficiency is high, and it can effectively capture fine dust, smoke and other particulate matter.

Long life: It has a long service life, is not easy to age, wear and tear, and is durable.

Easy maintenance: Easy to clean, only frequent cleaning or water flushing is required to restore the filtration efficiency of the filter bag.

Environmental protection and energy saving: use high-temperature dust-resistant dust bags for dust removal, without the use of chemicals and other additional equipment, to achieve the purpose of environmental protection and energy saving.

Wide range of applications: It is suitable for the treatment of high-temperature and highly corrosive waste gas in various industrial fields, such as steel, cement, chemical, electronics and other industries.

Due to the above advantages, high-temperature dust-resistant bags have been widely used in industrial waste gas treatment and have been favored by more and more enterprises.

The dust bag is an important accessory on the bag dust collector, so it is very important to choose the dust bag, especially the high-temperature dust-resistant bag, because there are too many varieties of high-temperature dust-resistant bags, and each has its own advantages, so the choice is very important.

The wear of dust bags is mainly related to the design, application, manufacturing and installation quality of the dust collector. The abrasion process starts locally, but as long as small wear holes are formed, they will quickly spread, causing greater bag damage. Therefore, strengthening the inspection and detection during operation and early detection of small wear are also important factors to avoid large-scale filter bag wear.

The high-temperature dust-resistant bag has the characteristics of high temperature resistance, high strength, acid and alkali corrosion resistance, wear resistance, and bending resistance.

High temperature resistant dust removal cloth bags are widely used in steel plants, cement plants, power plants, non-ferrous metal smelting, carbon black plants, chemical plants, garbage incinerators, asphalt concrete mixing plants, food processing plants, wood processing. After PTFE impregnation and other surface chemical treatment and finishing technology, the high-temperature dust-resistant cloth bag also has the characteristics of easy ash cleaning, water and oil repellency, anti-static, etc.; High temperature resistant dust bag and series of products suitable for different temperature ranges such as -300.

Compared with glass fiber filter media, the high-temperature dust-resistant bag has significantly improved wear resistance, bending resistance and peel strength, and can bear high filtration load. The filtration speed can reach more than that, and the running resistance is low. Compared with the synthetic chemical fiber high-temperature filter material, the high-temperature dust-resistant bag overcomes the weaknesses of large elongation, large deformation, low temperature resistance and poor corrosion resistance of the chemical fiber filter material. Dimensional stability, strength is better, and ** lower than other high-temperature resistant chemical fibers.

The selection of dust bag is very important, it directly affects the dust removal effect of the dust collector, and the selection of dust bag is mainly selected from the temperature, humidity and chemistry of the gas, particle size, dust concentration, filter wind speed, and dust removal method. Dust removal bags are generally divided into pulse dust removal filter bags, rapping dust removal bags, and back-blowing dust removal bags according to different ash cleaning methods.