P84 filter bag

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P84 filter bag

P84 (polymide) dust collector filter media displays excellent stability under dry high heat temperatures, has great filtration properties, and performs well even under elevated levels of moisture content.

▶Fiber/Core Material：P84（Polyimide powder）
▶Pros：Excellent stability in applications with high dry heat temperatures, mineral acids, and alkaline.
▶Cons：Must oversize bag for shrinkage that can occur in temperatures above 450 Degrees F.
▶Applications：Waste-to-Energy，Coal Fired Boilers，Incinerators

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P84 (polymide) dust collector filter media displays excellent stability under dry high heat temperatures, has great filtration properties, and performs well even under elevated levels of moisture content. These are some of the reasons P84 is one of the more expensive filter medias used in pulse jet baghouse dust collectors. Industries that use P84 filter media range from waste to energy, power, and cement.

P84 filter bag specifications
Artical Name P84/M-Fiberglass
Filter Felt		 P84 Filter Felt
Material Fiber P84/M-Fiberglass P84 fiber
Scrim Glass fiber PTFE
Weight g/m³ 850±20 550
Thickness mm 3.1±0.2 2.0±0.2
Air Permeability m³/㎡.min.200pa 20-35 14-18
Breaking Strength（N/5cm） Warp ≥2500 ≥850
Weft ≥2800 ≥1000
Elongation@50N（%） Warp ≤10 ≤25
Weft ≤10 ≤50
Service Temperature（℃） Continuous℃ ≤260 ≤240
Instant℃ 280 260
Finishing Heat setting
PTFE Coating		 Singeing，Calendaring

Note：▶Max. operating temperature: 240℃/464℉; Ultimate temperature: 260℃/500℉
            ▶2Due to it’s leaf-shaped cross section, It’s 80% increase in filtration area than others filter Media.
            ▶The properties of Hydrolytic and Oxidation resistance are moderate. We suggest the water vapour content less than 35%Vol and O2 content less than 16%Vol.
            ▶Oxysulfide will shorter the service life of P84 bag, the suggestion content of oxysulfide should be less than 700mg/Nm3; the waste incinerator should have the desulfurizing unit.
leaf-shaped cross section
Post-processing methods & advantages 
PTFE Membrane: Applying a PTFE membrane will allow you to lengthen the life of your bag since the membrane acts as the filter cake. It would allow for very little dust to stick to the bag itself. As the dust stays on the surface of the membrane and does not get entrained into the fibers of the bag, this allows your filter to last twice as long. Other benefits include reduced wear and tear, savings on maintenance costs, reduced energy costs, and more.
 
Singe: A pre-treatment process that is achieved by passing the filter material over an open flame, removing any straggly surface fibers. The result is a uniform surface area that improves cake release.

Glazed: A pre-treatment process achieved by a high pressure pressing of the fiber at elevated temperatures. The fibers are fused to the body of the filter medium that improves mechanical stability.
APPLICATION OF P84 DUST FILTER BAG
▶Boiler
▶Incinerators
▶Cement plants
▶Drying oven
▶Metallurgical plant


 

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