The Efficiencies of different Dust Collectors and Characteristics of PM_2.5 Water-soluble Ions in Industrial Fluidized Bed Boilers

China Special Equipment Inspection and Research Institute, Beijing, 100029, China

^* Corresponding author’s e-mail: lianglin@csei.org.cn

Abstract

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. NH₄⁺, K⁺, Mg²⁺, Ca²⁺ cations, and F^-, Cl^-, NO₃^-, SO₄^2-anions were analyzed by ion chromatography. It was found that the contents of Ca²⁺ and SO₄^2-were higher in PM2.5 samples, and the contents of Ca²⁺ and SO₄^2-were different among different boilers, The content of Mg²⁺ in cations is relatively low, the content of F^- in anions is relatively low, and NO₃^-is not detected in many samples.