Anti-Corrosion Experiments on Filter Media for Smoke Filtration

Practice proves that baghouse is becoming the primary means of controlling industrial smoke. As the core part of the baghouse, filters will degrade on mechanical performance because of the corrosive chemicals in the flue gas. Research of chemical corrosion on the filter strength is important for the filter selection, and system operation optimization. In this paper, seven popular filters are considered for hot sulfuric acid corrosion, alkali corrosion, long-time acid corrosion. A serials of data are got. The results show that, in the corrosion environment of acid and alkali, the mechanical strength of most of the filters decrease in some degree. In the environment of hot acid, the strength of filters except PPS decrease apparently, Aramind and Polyamide-imide are the largest decline. In the environment of alkali, the strength of filters except polyphenylene sulfide and polyimide drop significantly, Polyamide-imide can not tolerate the corrosion of alkali. With the corrosion time, the strength of all filters show decline trend, Polyamide-imide is the worst one. PPS has good resistance to corrosion.