Industrial dust collection filter bag material introduction

The material of the dust collection filter bag is synthetic fiber, natural fiber or glass fiber woven cloth or felt.If necessary, the cloth or felt is sewn into a cylinder or flat filter bag. According to the properties of flue gas, filter material suitable for application conditions is selected. Generally, when the flue gas temperature is lower than 120 ° C and the filter material is required to have acid resistance and durability, polyester flappies and polyester needle felt are often used; Dealing with high temperature flue gas.

Dust collector filter bag materials commonly used are: polypropylene (polypropylene), polyester (polyester), polyphenylene sulfide (PPS), partial aromatic polyamide (aramidan), polyimide (P84), polytetrafluoroethylene (PTFE) can be used alone, can also be blended.

According to the processing method, it is mainly divided into woven filter bag,non-woven filter bag and composite filter bag.

1, non-woven filter dust filter bag: does not go through the general spinning and weaving process, directly into the fiber mesh or yarn layer, staggered, bonded, needling, melt-blown or spun sheet filter material, to the letter NW and the specific processing method code composed of composite letters.

2, composite filter filter bag: dust bag filter material made of two or more methods or two or more materials composite, expressed by the letter C.

3, woven filter filter bag: the loom will be vertically arranged by the yarn and weft line, according to a certain organization of the filter material woven, expressed by the letter W.

There are many kinds of cloth bag materials, the most common polyester needle felt, high temperature resistant Flumas and so on. Polyester is an important variety of synthetic fiber, is the name of polyester fiber in China. It is based on refined terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw materials through esterification or transesterification and condensation reaction to prepare the forming polymer - polyethylene terephthalate (PET), spun and post-treatment made of fiber.

1. Polyester needle felt

Gram weight: 500

Thickness: 1.8

Operating temperature: ≤130℃

Instantaneous temperature: 150℃

Acid resistance: Excellent

Alkaline resistance: medium

Applicable to: steel plant, cement plant, coal mine and other industries

2, three anti-polyester needle felt

Gram weight: 500

Thickness: 1.8

Operating temperature: ≤130℃

Instantaneous temperature: 150℃

Acid resistance: Excellent

Alkaline resistance: good

It is suitable for pulverized coal injection in blast furnace of iron and steel plant, cement plant and power plant

3, polyester anti-static

Gram weight: 500

Thickness: 1.8

Operating temperature: ≤130℃

Instantaneous temperature: 150℃

Acid resistance: good

Alkaline resistance: medium

It is suitable for dust collection system of flour mill, chemical factory, coal mine and cement factory

4. Water and oil repellent

Gram weight: 500

Thickness: 1.8

Operating temperature: ≤130℃

Instantaneous temperature: 150℃

Acid resistance: good

Alkaline resistance: good

Suitable for cement factory, chemical factory, flour factory, woodworking furniture factory, etc

Medium temperature dust bag

1. Acrylic needle felt

Gram weight: 500

Thickness: 2.1

Operating temperature: ≤160℃

Instantaneous temperature: 180℃

Acid resistance: good

Alkaline resistance: good

Suitable for waste incineration, asphalt, spray dryer, coal mill, power plant, etc

2, PTFE needle felt

Gram weight: 750

Thickness: 1.1

Operating temperature: ≤260℃

Instantaneous temperature: 280℃

Acid resistance: Excellent

Alkaline resistance: good

Suitable for chemical industry, waste incineration, high temperature liquid filtration and other complex conditions

3. PPS needle felt

Gram weight: 500

Thickness: 1.8

Operating temperature: ≤190℃

Instantaneous temperature: 232℃

Acid resistance: Excellent

Alkaline resistance: excellent

It is suitable for filtering coal-fired boilers, waste incinerators, power plant fly ash dust collection treatment, etc

High temperature dust bag

1. P84 needle felt

Gram weight: 500

Thickness: 2.3

Operating temperature: ≤260℃

Instantaneous temperature: 280℃

Acid resistance: Excellent

Alkaline resistance: medium

Applicable to coal-fired boiler, liquid bed boiler, waste incineration, asphalt plant, cement plant, waste incinerator, etc

2. Flumax (FMS)

G weight: 800

Thickness: 2.0

Operating temperature: ≤280℃

Instantaneous temperature: 300℃

Acid resistance: good

Alkaline resistance: good

Suitable for steel, smelting, ferroalloy, chemical industry, cement, calcium carbide, waste incineration, electricity, asphalt mixing, etc

3. Nomex/ Aramide

Gram weight: 500

Thickness: 2.0

Operating temperature: ≤204℃

Instant temperature: 250℃

Acid resistance: medium

Alkaline resistance: medium

Applicable to asphalt, cement, steel, non-ferrous metals, lime, dust, metallurgy, plastic, carbon black, coke, tobacco and other industries

4, glass fiber needle felt

Gram weight: 1000

Thickness: 2.1

Operating temperature: ≤280℃

Instantaneous temperature: 300℃

Acid resistance: Excellent

Alkaline resistance: excellent

Applicable to steel, metallurgy, carbon black, power generation, cement, chemical industry and other high temperature flue gas industry