BOILER Industry
Boiler Flue Gas Filtration Challenges
Optimize your plant’s emission control with our high-performance filter bags for boiler. Designed for the baghouse stage between SCR and desulfurization, these durable boiler baghouse filter bags withstand extreme temperatures and harsh exhaust. Maximize dust capture efficiency and ensure environmental compliance with ease.
Circulating Fluidized Bed
1
Fuel Combustion
2
Heat Recovery
3
Flue Gas Treatment
4
Baghouse Filtration
5
Stack
*The position of the baghouse may vary according to the boiler design and the arrangement of the desulfurization, denitrification and ash-handling systems.
Boiler Flue Gas Filtration Challenges
High and Changing Temperatures:
Boiler start-up, shutdown, and load changes can expose filter bags to temperatures above normal operating conditions. The selected material must tolerate both the continuous temperature and short temperature surges.
Acid Gas Corrosion:
Sulfur oxides, nitrogen oxides, and other acid gases can reduce filter bag strength. The risk becomes greater when the flue gas temperature approaches the acid dew point.
Moisture and Hydrolysis:
Biomass and industrial boilers may produce high-moisture flue gas. Moisture combined with heat can cause hydrolysis and shorten the life of unsuitable filter media.
Abrasive Fly Ash:
High dust loading and abrasive fly ash can damage the bag surface, seams, and areas that contact the filter cage.
Boiler Filter Bags for Different Boiler Systems
Boiler baghouses operate under very different flue gas conditions. Fuel type, combustion efficiency, desulfurization process, temperature, moisture, and oxygen content can all affect filter bag performance.
A filter material that performs well in a dry coal-fired boiler may fail quickly in a wet biomass or high-oxygen application. Aokai therefore selects boiler filter bags according to actual operating data instead of relying only on the nominal boiler type.
| Boiler application | Main filtration challenges | Typical material options |
|---|---|---|
| Coal-fired boiler | Fly ash, acid gases, temperature changes | PPS, PPS+PTFE, PTFE |
| CFB boiler | Abrasive dust, variable temperature, high dust loading | PPS blend, PTFE, fiberglass composite |
| Biomass boiler | High moisture, alkali compounds, unstable combustion | PTFE, PPS+PTFE, aramid blends |
| Industrial boiler | Fuel variation, moderate temperature, intermittent operation | Polyester, acrylic, PPS or aramid |
| Waste heat boiler | High temperature and fine particulate matter | Aramid, P84, fiberglass, PTFE |
*The materials above are general starting points. Final selection must be based on the actual operating temperature, oxygen level, moisture, acid gas concentration, dust abrasiveness, and cleaning method.
How to Select Boiler Filter Bag Material
| Malzeme | Typical continuous temperature | Main advantages | Important limitations |
|---|---|---|---|
| Polyester | Up to 130°C | Economical and abrasion resistant | Limited hydrolysis and high-temperature resistance |
| Akrilik | Up to 130°C | Better hydrolysis resistance than polyester | Not suitable for very high temperatures |
| PPS | Up to 160°C | Good resistance to acids and hydrolysis | Sensitive to high oxygen and excessive temperature |
| Aramid | Up to 204°C | Strong heat and abrasion resistance | Limited resistance to hydrolysis and strong acids |
| P84 | Up to 240°C | Fine fibre structure and high filtration efficiency | Requires careful chemical compatibility review |
| Fiberglas | Up to 240°C | High-temperature stability | Requires controlled handling and suitable finishing |
| PTFE | Up to 240°C | Excellent chemical and temperature resistance | Higher initial material cost |
Recommended Filter Bag Solutions for Boiler Baghouses
Aokai boiler baghouse filter bags products that are most commonly used in the Power Industry:
Suitable for many coal-fired and industrial boiler applications with acidic flue gas. Oxygen content, continuous temperature and temperature surges must be checked before selection.
Fiberglass Composite Filter Bags
Designed for high-temperature boiler and waste heat applications. Fibre blend, surface treatment and bag construction are selected according to dust abrasiveness and cleaning intensity.
Cabture® Lifespan PTFE Filter Bags
Recommended for corrosive flue gas, high moisture and demanding chemical conditions. PTFE filter bags can also be supplied with an ePTFE membrane for improved fine-particle capture and dust release.
CareClean® Low-Resistance Filter Bags
Developed to reduce operating differential pressure while maintaining fine-particle collection. The solution is available for suitable boiler baghouse operating conditions.
Boiler Filter Bag Application Case
Termik santral davası
Hava debisi (m3/sa): 260.000
Yanma maddesi: 10% çamur + 90% kömür
FGDD: Kireçtaşı-alçı ıslak baca gazı desülfürizasyonu + SNCR
Kükürt içeriğine göre kömür kalitesi (%): <1,0
Maksimum Dalgalanma Sıcaklığı（℃）：160
Gaz Bileşimi: SO₂ < 200 mg/m³, NOx < 400 mg/m³, O₂ < 121 TP3T
Çanta boyutu: 160×8000 mm
Filtre torbası: CareClean® Düşük Dirençli Filtre Torbaları
Emisyon: <10mg/m3
Termik santral davası
Handling air volume（m3/h）：13.8 / 23,000
Yanma ortamı: kömür
FGDD: Yarı Kuru Baca Gazı Desülfürzasyonu + SNCR/SCR
Kükürt içeriğine göre kömür kalitesi (%): <0,5
Sürekli Sıcaklık（℃）：＜100
Maksimum Dalgalanma Sıcaklığı（℃）：160
Torba boyutu: Φ127×8110 / Φ160*6300 mm
Filtre torbası: CareClean® Düşük Dirençli Filtre Torbaları
Emisyon:＜3mg/m3
Uygulama Case Studies in the Power Kazan Endüstrisi
Zhejiang'da bulunan bir termik santraldeki CFB kazanında yaklaşık bir yıllık Careclean® dirençli filtre torbaları kullanımı sonrasında, bir ve altı aylık operasyon dönemlerindeki partikül madde testleri, çıkış konsantrasyonlarının her ikisinde de yaklaşık 1 mg/m³ civarında olduğunu göstermiştir. Sistem ayrıca düşük işletme direnci sergileyerek müşteriden olumlu geri bildirim almıştır.
| Öğe | Önce(PPS filtre ortamı) | Değişimden Önce (Careclean®) | Operasyon Etkisi |
|---|---|---|---|
| İşletme direnci (pa) | 1200-1500 | 520-600 | diferansiyel basınç düşüşü 50% |
| Çıkış konsantrasyonu (mg/m3) | 6.8 | <1 | Sıfıra yakın emisyon |
| Yıllık elektrik maliyetlerinden tasarruf edin | / | 8.000 ¥ (tahmini) | 0,4 kWs |
| Elektrik tasarrufu sağlayın (ömrü boyunca) | / | 260.000 ¥ (tahmini) | 4 yıl |