The first choice for high-temperature flue gas treatment? Actual performance of pre-oxidation filter bags under 200℃ working conditions

1. Technical advantages of pre-oxidation filter bags: Why is it the first choice for 200℃ working conditions?

Temperature resistance: balancing high temperature tolerance and economy

Pre-oxidation filter bags use polyacrylonitrile (PAN) or homo-aramid fiber, and through gradient oxidation treatment at 200-300℃, the fiber molecular chain forms a heat-resistant ladder structure.

Its performance is significantly better than conventional materials:

Continuous working temperature: 180-220℃, instantaneous temperature resistance up to 240℃, perfectly covering the mainstream working conditions of 200℃

Heat shrinkage rate: ≤1.5% (210℃ test), much lower than 3% of ordinary aramid

Cost-effectiveness: The price is only 60% of PTFE filter bags and 40% lower than P84 filter bags

Table: Comparison of temperature resistance of pre-oxidation filter bags and competing products (200℃ working conditions)

2. Anti-oxidation and chemical stability: dealing with complex flue gas components

In waste incineration, steel sintering and other scenarios, flue gas often contains corrosive components such as SO₂ and HCl.

Pre-oxidation filter bags improve durability through the following mechanisms:

Acid resistance: Strength retention rate in the pH range of 2-11 is >90%. The application of a waste incineration plant shows that its life is 30% longer than that of PPS filter bags

Hydrolysis resistance: In a hot and humid environment (humidity >60%), the fiber structure stability is better than P84

Surface treatment: PTFE impregnation coating makes the contact angle >120°, effectively blocking the adhesion of oily dust

3. Product advantages of pre-oxidation filter bags

Excellent high temperature resistance

Wide operating temperature range: continuous operating temperature reaches 180-220℃, instantaneous temperature resistance is 240℃, perfectly covering the needs of medium and high temperature working conditions (about 200℃) such as steel sintering and cement kiln tail.

Strong thermal stability: thermal shrinkage rate ≤1.5% (210℃ test), which is much lower than 3% of ordinary aramid filter bags, avoiding sealing failure caused by high temperature deformation.

Outstanding cost performance: the price is only 60% of PTFE filter bags and 40% lower than P84 filter bags, which is an economical choice for medium and high temperature working conditions.

Excellent chemical stability

Corrosion resistance: Strength retention rate is >90% in the pH range of 2-11, especially suitable for waste incineration flue gas (including SO₂, HCl) and high sulfur environment of coal-fired power plants.

Anti-hydrolysis: performance decays slowly in a humid and hot environment, and the service life is 30% longer than that of PPS filter bags, avoiding oxidation embrittlement caused by gases such as NOx.

Surface protection: PTFE impregnation coating makes the contact angle greater than 120°, effectively blocking the adhesion of oily dust and reducing the energy consumption of cleaning.

Efficient filtering performance

High filtering accuracy: The capture rate of 0.3μm particles is ≥99.99%, meeting the requirements of ultra-low emissions (<10mg/m³).

Low operating resistance: The initial resistance is 800-1000Pa, and it is stable below 1200Pa for a long time, reducing energy consumption by 15-30% year-on-year.

Convenient cleaning: The surface singeing and calendering treatment increases the dust removal rate to 99.5%, and the pulse cleaning interval can be extended to 2 hours.

Long life and economy

Wear-resistant design: Glass fiber + P84 blended or metal fiber reinforced structure, the anti-scouring ability is increased by 3 times, and the service life of cement kiln tail is 18 months (50% longer than glass fiber coating).

Low comprehensive cost: The replacement frequency is reduced by 60%, and the annual maintenance cost is reduced by more than 500,000 yuan (actual measurement of waste incineration plant).