Title: Levels and profiles of dioxins from circulating fluidised bed incineration

Authors: Longjie Ji; Shengyong Lu; Xiaoqing Lin; Mi Yan; Xiaodong Li; Tong Chen; Alfons Buekens; Jianhua Yan

Addresses: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, China ' State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, China ' State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, China ' Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou, China ' State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, China ' State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, China ' State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, China; Chemical Engineering Department, Vrije Universiteit Brussel, Brussels, Belgium ' State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, China

Abstract: In China, minimising the emissions of polychlorinated dibenzo-pdioxins and dibenzofurans (PCDD/F) from municipal solid waste incineration (MSWI) remains full of challenges. This paper presents a comprehensive diagnosis of formation, destruction and removal of dioxins in MSWI, after finding out their main area of formation and the parameters influencing their level and signature. The PCDD/F loads significantly increase between furnace exit and the entrance of the air pollution control system (APCS), i.e., in the temperature range of 450 to 250°C. In addition, co-combustion of low-calorific municipal solid waste (MSW) with sulphur-containing coal provides pathways to reduce PCDD/F creation by improving combustion conditions, reducing precursors and unburned carbon, and suppressing PCDD/F formation by the SO₂ liberated. Adequate activated carbon (AC) feeding systems and adsorption ability of AC are essential for removing dioxins.

Keywords: municipal solid waste; MSW incineration; MSWI; polychlorinated dibenzo-p-dioxins; dibenzofurans; PCDD/F; activated carbon; fingerprint; congener patterns; inhibition; suppression; dioxins; circulating fluidised bed; CFB combusion; China; furnace exit; air pollution control; sulphur-containing coal; adsorption; dioxin removal.

DOI: 10.1504/IJEP.2016.082117

International Journal of Environment and Pollution, 2016 Vol.60 No.1/2/3/4, pp.136 - 155

Received: 21 May 2016
Accepted: 19 Aug 2016
Published online: 07 Feb 2017 *

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