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Formation and removal characteristics of sulfuric acid mist in a wet flue gas desulfurization system
Author(s) -
Pan Danping,
Yang Linjun,
Wu Hao,
Huang Rongting,
Zhang Yaping
Publication year - 2017
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5038
Subject(s) - flue gas desulfurization , sulfuric acid , scrubber , mist , wet scrubber , data scrubbing , chemistry , flue gas , nucleation , aerosol , waste management , inorganic chemistry , organic chemistry , meteorology , engineering , physics
ABSTRACT BACKGROUND Owing to the visible plume and secondary aerosol formation, the emissions of sulfuric acid mist from coal‐fired power plants have attracted increasing attention. To provide more information for the control of sulfuric acid mist emission, investigations were made of the formation and removal characteristics of sulfuric acid mist in a wet flue gas desulfurization system. RESULTS The results showed that large numbers of sulfuric acid droplets with sizes less than 0.1 µm were generated via homogenous nucleation. With higher inlet SO 3 concentrations, the fine particle concentration after desulfurization was increased. Increases in the liquid–gas ratio and the inlet fly ash concentration and decreases in the inlet flue gas temperature improved the sulfuric acid mist removal efficiency. The wet flue gas desulfurization ( WFGD ) system with double scrubbers achieved higher sulfuric acid mist removal efficiency than the WFGD system with a single scrubber. CONCLUSION The sulfuric acid mist droplets created via homogenous nucleation were mainly in the submicron range, and their removal efficiencies in the WFGD system were influenced by the desulfurization operating parameters. The WFGD system with double scrubbers achieved higher removal efficiency. © 2016 Society of Chemical Industry