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What is the dust capacity of the cloth bag of the water-repellent and oil-resistant film dust collector?

March 17,2023

Under normal circumstances, if the acidity of dusty gas is small, its dew point temperature is 40-60 ℃. If the acidity is large, the dew point temperature may be as high as 120 ℃.

The production process of water-repellent and oil-resistant needled felt is as follows: fiber opening — carding — web laying — pre-piercing — main piercing — felting — singeing — calendering — impregnating PTFE (waterproof agent) — drying — shaping — rolling — packaging.

The filter bag with waterproof and oil-proof treatment of the filter cloth is used in the occasions with high moisture content. Compared with the ordinary filter bag, the filter material is not easy to block the paste bag, so the service life of the filter bag can be extended, the ash cleaning cycle can be extended, and the gas flow through the filter bag can also be increased, so the energy consumption and maintenance cost can be greatly saved.

Filter material name: water-repellent and oil-resistant polyester needle felt filter material
Material: polyester fiber
Gram weight (g/m2): 500
Thickness (mm): 1.80
Air permeability (m3m2/min): 12
Breaking strength (N/5 × 20cm): warp direction>800
Latitude>1250
Breaking elongation (%): warpLatitudeContinuous working temperature (℃): ≤ 130
Short-time working temperature (℃): 150
Water repellent grade (water temperature 27 ℃, relative humidity 20%): Grade 5 AATCC100
Acid resistance: good
Alkali resistance: good
Wear resistance: excellent
Hydrolysis stability: good
Surface treatment: water and oil repellent treatment (Teflon coating)

The dust capacity of the dual-proof polyester dust collector bag at normal temperature is also called dust load, which refers to the amount of dust accumulated on the filter material per unit area when the given resistance value is reached. The dust capacity of the filter material affects the operation resistance and dust cleaning cycle of the dust removal filter bag. In order to reduce the frequency of dust removal and prolong the service life of the filter bag, it is better to have a larger dust capacity of the filter material. The dust capacity is related to the porosity and permeability of the filter material. The dust capacity of the nonwoven felt filter material is larger than that of the textile filter material.

How much does the dust capacity affect the filtration efficiency of the dual-proof polyester dust collector bag at normal temperature?

The filtration efficiency of the dual-proof polyester dust collector bag at normal temperature depends on the internal structure of the filter material on the one hand and the dust layer formed on the filter material on the other hand. From the structure of the filter material, the filtration efficiency of the filter bag made of short fiber is higher than that of the filter bag made of long fiber. Nonwoven felt filter material is higher than textile cloth filter material. From the formation of the dust layer, for the thin filter material, the dust layer will be damaged after dust removal, and the efficiency will be reduced a lot, while for the thick filter material, after dust removal, a part of the dust can be retained to avoid excessive dust removal. Generally speaking, the high efficiency of Zui can be achieved without fracturing and aging of the filter material. Therefore, as long as the design parameters are properly selected, the dust removal effect of the bag filter should be no problem. Because the service life of the filter material depends on the quality of the filter material body and the service conditions.


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