How many degrees can p84 dust filter bag withstand temperature

p84 dust filter bag can withstand the temperature, P84 high temperature needle felt by the polyimide fiber through the needle, its characteristics due to its own fiber fineness and significant.

P84 filter material with high temperature performance, good chemical resistance, with acid and alkali properties of dust gas has a very significant effect, widely used in waste incineration, thermal power generation, steel, metallurgy and other industries of flue gas purification.

P84 high temperature needled felt has the characteristics of high temperature, acid base, folding, etc., long service life, the surface through chemical treatment and post-treatment technology, with easy ash cleaning, oil and water repellency and other characteristics.

Product characteristics

1, significant temperature: can be long-term operation at 260 ° C temperature, short-term operating temperature up to 280 ° C.

2, good acid-base and oxidation resistance, there is a certain degree of hydrolysis.

3, low pressure and high effect.

4, wide range of application.

The high temperature resistant dust filter bag is formed by dipping, pre-baking and baking by using hydrophobic agent and oleophobic agent. After the hydrophobic agent and the oleophobic agent are rapidly dried, they are attached to the surface of the filter material fiber with a mesh package, thereby reducing the surface tension of the water and oil and the filter bag, so that the wet filter medium formed by water, oil and dust will not adhere to the surface of the filter bag, thereby avoiding the phenomenon of pasting the bag. During the operation of the bag dust collector, for the dust in the gas contains more water and oil and hygroscopic and easy to damp dust, it is possible to generate water film or oil film on the surface of the dust and increase the adhesion, which helps to trap the dust, but it will make it difficult to clean the dust. Especially when the high temperature gas is in a high humidity state, condensation occurs due to the cooling effect of the external gas. This can not only make the captured dust scale on the surface of the filter bag, or even clog, but also corrode the structural material, increase the operating resistance of the dust collector, and directly affect the normal operation of the bag dust collector.

P84 high temperature needle felt dust filter bag manufacturer is a flame retardant, temperature stable fiber filter material, at 240℃ temperature conditions, P84 polyimide fiber filter material mechanical will not change, high temperature up to 260℃. P84 fiber filter material has no melting point temperature and is a natural golden color. P84 polyimide fiber filter material is not hygroscopic fiber filter material (about 3% water absorption at 65% relative humidity conditions).

In addition, because the P84 fiber is a special-shaped (leaf type) cross section structure, with a large filter surface area, has excellent filtration performance, so P84 fiber is often implanted in the filter surface (dust surface side to improve the filtration performance of the filter material).

P84 High temperature needle felt

P84 high temperature needled felt is made of polyimide fiber by needling, and its characteristics are remarkable because of its fiber fineness. P84 filter material with high temperature resistance, good chemical resistance, with acid and alkali properties of dust gas has a very significant effect, widely used in waste incineration, thermal power generation, steel, metallurgy and other industries of flue gas purification.

dust filter bag is the key part of the bag dust collector operation process, dust filter bag fabric and planning should be as far as possible to seek efficient filtration, easy dust stripping and durable role, the general cylinder type dust filter bag hanging vertically in the dust collector. P84 high temperature dust filter bag fiber, also known as polyimide, its basic chemical composition is mainly composed of aromatic units. P84 high temperature dust filter bag fiber filter material must have the following characteristics:

1, P84 high temperature dust filter bag fiber cross section is irregular three-lobe section, this special section makes P84 high temperature dust filter bag fiber surface area increases, P84 high temperature dust filter bag can effectively capture smile particles, easy to clean;

2, P84 high temperature dust filter bag fiber is non-combustible;

3, P84 high temperature dust filter bag fiber has very superior chemical properties, corrosion resistance;

4. P84 high temperature dust filter bag fiber is high temperature resistant, can run continuously at 260 ° C, and can withstand the maximum instantaneous temperature of 280 ° C.

It is worth noting that although the P84 high temperature dust filter bag filter material has high temperature resistance, the use temperature of P84 high temperature dust filter bag is inversely proportional to the concentration of acidic substances in the dust gas, the higher the concentration of acidic substances, the lower the use temperature of P84 high temperature dust filter bag, the lower the concentration of acidic substances.

The excellent characteristics of P84 high temperature dust filter bag filter material determine that it has good economic benefits, although the one-time investment is high, but the service life of P84 high temperature dust filter bag is very long, reducing the number and cost of replacing P84 high temperature dust filter bag, reducing the labor intensity of workers, Reduce the downtime due to the replacement of P84 high temperature dust filter bag and the resulting loss of profit caused by furnace shutdown.

(1) Using P84 high temperature dust filter bag as filter material, the bag dust collector has low pressure loss, stable pressure loss change, greatly saving the energy consumption of the induced draft fan and the fan, reducing the operation steps and operating costs.

(2) The dust capture precision of P84 high temperature dust filter bag filter material is high, which can make the emission concentration meet the national requirements or even zero emission.

(3) Due to the long service life of P84 high temperature dust filter bag filter material, it can be used for more than four years under normal use conditions, greatly extending the bag changing cycle and reducing maintenance costs.

(4) P84 high temperature dust filter bag filter material has good filtration performance and good permeability, reduce the number of times can be cleaned and compressed air trumpet, thus reducing the energy consumption of air compressor, extend the filter material, pulse injection equipment, compressed air system life, is the filter material to maximize the benefit.

(5) P84 high temperature dust filter bag filter material can be used in harsh working conditions, such as high temperature, high corrosion, high abrasive gas and so on.

P84 high temperature dust filter bag filter felt, so the backwash pressure is small and the filter cake bounce efficiency can be significantly improved, with a fine powder collection efficiency is high and the operating pressure difference is small. Applicable to coal-fired boiler, liquid bed boiler, waste incineration, asphalt plant, cement plant, waste incinerator, etc.

Gas temperature

Dust gas temperature is an important factor in the selection of filter bags. Generally, the dust containing gas less than 130 ° C is called normal temperature gas, and the dust containing gas greater than 130 ° C is called high temperature gas, so the filter bag can be divided into two categories: the normal temperature filter bag below 130 ° C and the high temperature filter bag above 130 ° C. To this end, the appropriate filter bag should be selected according to the flue gas temperature. In actual work, some people call 130 ~ 200 ℃ gas as medium temperature gas, but the filter bag is more than selected high temperature type.

The temperature resistance of the filter bag has two kinds: "continuous long-term use temperature" and "instant short-term temperature". "Continuous long-term use temperature" refers to the long-term temperature at which the filter bag can be used and run continuously, and the filter bag should be selected at this temperature. "Instantaneous short-term temperature" refers to the maximum temperature of the filter bag that is not allowed to exceed 10 minutes per day, and if the time is too long, the filter bag will soften and deform.