Dioxin mass balance in fluidized bed incinerator co-firing<br /> municipal solid waste and coal

doi:10.3785/j.issn.1008-973X.2011.12.018

2011, Vol. 45

Issue (12): 2188-2195 DOI: 10.3785/j.issn.1008-973X.2011.12.018

Dioxin mass balance in fluidized bed incinerator co-firing
municipal solid waste and coal

LU Sheng-yong, WU Hai-long, CHEN Tong, LI Xiao-dong, YAN Jian-hua

State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang
University, Hangzhou 310027, China

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Abstract

Mass balance investigation was introduced to estimate dioxin formation or elimination during municipal solid waste (MSW) incineration process. A dioxin mass balance equation between input and output was established according to the characteristics of dioxin emission from a fluidized bed incinerator co-firing MSW and coal, and the dioxin mass fraction or mass concentration in flue gas, fly ash, and slag were tested under several operation conditions. Results indicated that the dioxin inhibition phenomenon attributed to SO2 from coal burning was delayed due to “memory effect”; large amout of dioxin was abated when co-firing with MSW and coal, and the output I-TEQ mass value of dioxin was much less than the inputvalue. The dioxin mass balance from the MSW incinerators abroad and domestic was compared, and the results turned out that toxic dioxin annual emissions from the investigated fluidized bed co-firing MSW and coal were bewteen -495.029 mg and 4.524 mg, which were much lower than those from the cited incinerators abroad and domestic. It was revealed to some extend that the dioxin emission could be totally reduced by this kind of incinerator.

Published: 01 December 2011

CLC:

TK 229

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Cite this article:

LU Sheng-yong, WU Hai-long, CHEN Tong, LI Xiao-dong, YAN Jian-hua. Dioxin mass balance in fluidized bed incinerator co-firing
municipal solid waste and coal. J4, 2011, 45(12): 2188-2195.

URL:

https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2011.12.018 OR https://www.zjujournals.com/eng/Y2011/V45/I12/2188

垃圾和煤混烧流化床焚烧炉的二恶英排放质量平衡

为了研究二恶英的生成与消减情况,引入二恶英质量平衡的方法.建立某垃圾和煤混烧流化床焚烧炉的二恶英输入、输出质量平衡方程式,并在该焚烧炉中开展了多个运行工况条件下的烟气、灰渣中的二恶英质量浓度和质量分数检测试验.研究发现,由于“记忆效应”,掺煤燃烧产生的SO2对二恶英的抑制作用有延迟现象,垃圾和煤混烧能消减原生垃圾中的大部分二恶英,使焚烧系统输出的二恶英毒性质量远小于输入的二恶英毒性质量.还对比了国内外一些垃圾焚烧炉的二恶英排放质量平衡,发现垃圾和煤混烧流化床焚烧炉毒性二恶英的环境年排放量为-495.029～4.524 mg,比国内外报道中的垃圾焚烧炉更低,在一定程度上说明该焚烧炉可从总体上有效减少二恶英排放.

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