Many industrial plant managers struggle with frequent filter bag aging and damage under high temperature flue gas environments. Wrong filter media selection leads to frequent replacement, increased downtime and failure to meet emission standards. This article breaks down material characteristics of mainstream high temperature filter bag to guide scientific purchasing decisions.
Nomex filter bag bears continuous operating temperature up to 204 degrees with outstanding abrasion resistance, fitting cement kiln and asphalt mixing plant dust removal scenes. Its dense fiber structure resists hard particle friction and prolongs service cycle under dry high temperature. Yet it cannot withstand long term acid and high humidity flue gas, which will cause fiber hydrolysis and rapid failure.
PPS filter bag works stably within 190 degrees continuous temperature and owns moderate acid and alkali resistance, becoming mainstream choice for coal fired power plant boiler flue gas filtration. Uniform fiber structure avoids dust penetration, and daily maintenance cost stays low. The material lacks strong oxidation resistance, so environments with excessive oxygen content will accelerate aging speed.
PTFE filter bag supports continuous operation at 260 degrees with full resistance to all acid alkali corrosive flue gas, perfectly matching waste incineration and chemical plant harsh working conditions. Smooth surface achieves easy dust cake shedding and reduces pulse cleaning frequency. The only drawback lies in higher raw material cost compared with other high temperature filter bag materials.
P84 filter bag balances temperature resistance and chemical stability, adapting to mixed acid alkali flue gas with temperature fluctuation in metal smelting and industrial kilns. It maintains complete fiber structure under alternate hot and cold working conditions without obvious shrinkage. For factories with variable flue gas components, P84 becomes balanced cost performance filter bag material selection.
