Characteristics of dioxin emissions from a Waelz plant with acid and basic kiln mode

NCU Institutional Repository > 工學院 > 環境工程研究所 > 期刊論文 > Item 987654321/108639

請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/108639

題名:	Characteristics of dioxin emissions from a Waelz plant with acid and basic kiln mode
作者:	張木彬;Hung, Pao Chen;Chi, Kai Hsien;Chen, Mei Lien;Chang, Moo Been
貢獻者:	工學院環境工程研究所
關鍵詞:	activated carbon;adsorbents;Adsorption;Air Pollutants - analysis;Air Pollutants - isolation & purification;Basic kiln mode;Benzofurans - analysis;Benzofurans - isolation & purification;calcium hydroxide;Calcium Hydroxide - chemistry;catalysts;Charcoal - chemistry;Coal Ash - chemistry;Dibenzofurans, Polychlorinated;Dioxins - analysis;Dioxins - isolation & purification;Dust;Electric arc furnaces;Electric filters;Filtration;Flue gases;Flues;Fly ash;gases;Hazardous Waste;Hydrochloric Acid - chemistry;Incineration;Kilns;Metal recovery;Partitioning;PCDD/F;pollutants;polychlorinated dibenzodioxins;Polychlorinated Dibenzodioxins - analogs & derivatives;Polychlorinated Dibenzodioxins - analysis;Polychlorinated Dibenzodioxins - isolation & purification;polychlorinated dibenzofurans;Power plants;Waelz process
日期:	2012-01-30
上傳時間:	2026-04-23 15:00:17 (UTC+8)
出版者:	Elsevier;Netherlands: Elsevier B.V
摘要:	摘要： ► Characteristics of PCDD/F emission from Waelz process with acid/basic operating modes are compared. ► Ca(OH) 2 added in basic mode effectively reacted with and HCl (g) and reduced PCDD/F formation. ► Operating the Waelz process in basic more greatly reduced total PCDD/F emissions. ► Total PCDD/F emission is reduced from 640 to 269 ng I-TEQ/kg EAF-dust treated. The concentrations of polychlorinated dibenzo- p-dioxins and dibenzofurans (PCDD/Fs) were measured in the flue gas of a Waelz plant operated in acid and basic modes, respectively. To abate (PCDD/F) and other pollutants, the plant operates with a post-treatment of flue gases by activated carbon injection and subsequent filtration. Relatively high PCDD/F discharge by fly ashes is found with acid kiln mode of the Waelz process. Therefore, basic kiln mode of the Waelz process is investigated and compared in this plant. With the adsorbent injection rate of 7 kg/h (95 mg/Nm 3), the PCDD/F concentration in stack gas was measured as 0.123 ng I-TEQ/Nm 3 in the basic operating mode. The added Ca(OH) 2 reacted with metal catalysts and HCl (g) in the flue gas and thus effectively suppressed the formation of PCDD/Fs. PCDD/F concentrations in fly ashes sampled from the dust settling chamber, cyclone, primary filter and secondary filter in basic kiln mode were significantly lower than that in acid kiln mode. Total PCDD/F emission on the basis of treating one kg of electric arc furnace dust in the basic operation mode was 269 ng I-TEQ/kg EAF-dust treated which was significantly lower than that in acid mode (640 ng I-TEQ/kg EAF-dust treated). 其他題名： J Hazard Mater 出版者： Netherlands: Elsevier B.V 出版日期： 2012-01-30 出處： Journal of hazardous materials, 2012-01, Vol.201 (30), p.229-235 版權： 2011 Elsevier B.V. 版權： Copyright © 2011 Elsevier B.V. All rights reserved. 識別號： ISSN: 0304-3894 識別號： ISSN: 1873-3336 識別號： EISSN: 1873-3336 識別號： DOI: 10.1016/j.jhazmat.2011.11.075 識別號： PMID: 22178278
顯示於類別:	[環境工程研究所 ] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	18	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....