Tong Chen This email address is being protected from spambots. You need JavaScript enabled to view it.1, Chen Sun1, Tianjiao Wang2, Mingxiu Zhan1,3, Xiaodong Li1, Shengyong Lu1, Jianhua Yan1

State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
Institute of Incineration Technology, Everbright Envirotech (China) Ltd., Nanjing 211102, China
College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China


Received: December 1, 2019
Revised: February 23, 2020
Accepted: March 23, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.2019.10.0536  

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Cite this article:

Chen, T., Sun, C., Wang, T., Zhan, M., Li, X., Lu, S. and Yan, J. (2020). Removal of PCDD/Fs and CBzs by Different Air Pollution Control Devices in MSWIs. Aerosol Air Qual. Res. 20: 2260–2272. https://doi.org/10.4209/aaqr.2019.10.0536


HIGHLIGHTS

  • The differences between PCDD/Fs and CBzs through APCDs were compared.
  • The removal efficiencies of SCR reactor and wet scrubber were investigated.
  • Indicator models should be reconstructed due to the memory effect of wet scrubbers.
 

ABSTRACT


This study investigated the removal efficiencies of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and chlorobenzenes (CBzs) by different air pollution control devices (APCDs) in three municipal solid waste incinerators (MSWIs). These devices were the semi-dry flue gas desulfurization (SDFGD) system, activated carbon (AC) injector, bag filters (BF), selective catalytic reduction (SCR) reactor, and wet scrubber. The SDFGD system, AC injector, and BF exhibited similar removal efficiencies for all of the pollutants. Overall, the removal efficiency of CBzs was also considerably lower than the PCDD/Fs. The less chlorinated CBzs were also less likely to be adsorbed by AC and BF and more likely to be decomposed by the SCR reactor. Additionally, the “memory effect” in the wet scrubbers elevated the concentrations of the PCDD/Fs and even the CBzs in the flue gas, with the highest increases observed for penta- to hepta-chlorinated PCDD/Fs and TrCBzs. Given the different effects of these various devices, especially the wet scrubber, the correlation between PCDD/F and CBz removal should be individually assessed for each APCD unit. More accurate indicators of PCDD/F removal are also examined.


Keywords: Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans; Chlorobenzenes; Air pollution control devices; Correlations; Emission characteristics




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