Note: using, partial failure and complete failure of the status of bag filter were defined as failure rate of that below 3%, 3-30% and above 30%, respectively.
The functional structure evolutions of PPS-based bag filter materials under the practical environments were detected by a FTIR spectrometer (WQF-510, Beijing Rayleigh Analytical Instrument Co., China) equipping with a single reflection attenuated total reflectance (ATR, PIKE, America) accessory. The spectral resolution of 4 cm-1, the range of 4000-400 cm-1 and scan times of 32 were adopted at ambient temperature. At the same time, the melting points of above samples were monitored by a thermal analyzer system (ZCT-B, Beijing JYGK Instrument Co., China). The samples were heated from 100 to 400 ℃ with a constant ramping rate of 10 ℃/min at air atmosphere. Besides, the samples were sealed previously into aluminum pans with approximately 10 mg before measuring.
Table 3. Sample labels and related parameters under the loading units above 300 MW.