Thermal removal of PCDD/Fs from medical waste incineration fly ash - Effect of temperature and nitrogen flow rate

被引：50
作者：
Wu, Hai-long [1 ]
Lu, Sheng-yong [1 ]
Yan, Jian-hua [1 ]
Li, Xiao-dong [1 ]
Chen, Tong [1 ]
机构：
[1] Zhejiang Univ, Inst Thermal Power Engn, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China
来源：
CHEMOSPHERE | 2011年 / 84卷 / 03期
关键词：
Bag filter; Dechlorination; Destruction; Medical waste incineration; DIBENZO-P-DIOXINS; FLUE-GAS; PCDD/PCDF; CARBON; DIOXINS/DIBENZOFURANS; DECHLORINATION; DESTRUCTION; DESORPTION; EMISSION; PATTERNS;
D O I：
10.1016/j.chemosphere.2011.02.015
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The fly ash used in this study was collected from a bag filter in a medical waste rotary kiln incineration system, using lime and activated carbon injection followed by their collection as mixed fly ash. Experiments were conducted on fly ash in a quartz tube, heated in a laboratory-scale horizontal tube furnace, in order to study the effect of temperature and nitrogen flow rate on the removal of PCDD/Fs. Results indicated that in this study PCDD/Fs in the fly ash mostly were removed and desorbed very little into the flue gas under thermal treatment especially when the heating temperature was higher than 350 degrees C, and dechlorination and destruction reactions took important part in the removal of PCDD/Fs. However, in terms of flow rate, when flow rate was higher than 4 cm s(-1), destruction efficiency of PCDD/Fs decreased dramatically and the main contributors were P5CDF. H6CDF and H7CDF desorbed to flue gas, the PCDD/Fs in the fly ash decreased with enhanced flow rate. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：361 / 367
页数：7
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