The dust filter bag is the core filter component of the bag filter. It captures particulate matter in the dust-containing gas through fiber materials to achieve dust separation.
Key points for selecting dust filter bags
- Material matching: Select matching filter bags according to gas temperature, humidity, chemical properties (such as acid and alkali corrosion) and dust characteristics (viscosity/particle size).
- Aperture design: The smaller the aperture, the higher the filtration efficiency, but it is necessary to balance air permeability and resistance to avoid blockage due to too small aperture.
- Parameter adaptation: Comprehensively consider particle size, dust concentration, filtration wind speed and cleaning method to ensure that the filtration efficiency is compatible with the equipment.
- Filtration speed: Affects equipment investment and filter bag life, usually determined by experience (related to dust properties and concentration).
- Cleaning method: Wet or dry cleaning will affect the life of the filter bag and needs to be matched with the working conditions.
Application areas of dust filter bags
Dust filter bags are suitable for industrial scenarios with high dust, high temperature or corrosive gas.
Power and Energy
- Coal-fired power plants: treat boiler flue gas and reduce smoke emissions to below 10mg/m³ (ultra-low emission standard).
- Waste incineration: high-temperature resistant PTFE dust filter bags resist dioxins and acidic gases.
Metallurgy and building materials
- Steel smelting: capture blast furnace and converter dust, and use aramid or P84 high-temperature resistant filter bags.
- Cement production: used for kiln head and kiln tail dust removal to reduce the spread of limestone dust.
Chemical and pharmaceuticals
- Chemical plants: corrosion-resistant PPS or PTFE filter bags treat sulfur- and nitrogen oxide-containing waste gas.
- Pharmaceutical workshops: anti-static dust filter bags avoid dust explosion risks.
Other industries
- Food processing: polypropylene filter bags are moisture-proof and oil-proof, and are used in flour and starch production.
- Electronic manufacturing: ultrafine fiber filter bags collect precision component processing dust.
Conclusion
Dust filter bags are important components of industrial dust removal systems. They have the characteristics of high dust collection rate, easy cleaning, and good dust removal effect. They are widely used in flue gas treatment and dust removal systems in many industries such as steel mills, refractory plants, foundries, and power plants. They are mainly used to capture dust particles in dust-containing gases.