The Efficiencies of different Dust Collectors and Characteristics of PM _2.5 Water-soluble Ions in Industrial Fluidized Bed Boilers

摘要

PM_(2.5)were collected before and after dust collectors of five industrial fluidized bed boilers by PM_(2.5)sampler. The ELPI was used to monitored the number and mass concentrations of PM_(2.5)before and after the dust collectors, and the dust removal efficiencies of different dust collectors was analyzed. The efficiencies of electrostatic and bag filter dust collectors are high, and the efficiency of mechanical dust collector is low. NH_(4)~(+), K~(+), Mg~(2+), Ca~(2+)cations, and F~(-), Cl~(-), NO_(3)~(-), SO_(4)~(2-)anions were analyzed by ion chromatography. It was found that the contents of Ca~(2+)and SO_(4)~(2-)were higher in PM2.5 samples, and the contents of Ca~(2+)and SO_(4)~(2-)were different among different boilers, The content of Mg~(2+)in cations is relatively low, the content of F~(-)in anions is relatively low, and NO_(3)~(-)is not detected in many samples.