The impact of thermal treatment and cooling methods on municipal solid waste incineration bottom ash with an emphasis on Cl

Shuo Yang, Amirhomayoun Saffarzadeh, Takayuki Shimaoka, Takashi Kawano, Yoshitada Kakuta

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

Municipal solid waste incineration (MSWI) bottom-ash products possess qualifications to be utilized in cement production. However, the instant use of bottom ash is inhibited by a number of factors, among which the chlorine (Cl) content is always strictly restricted. In this paper, the unquenched MSWI bottom ash was used as the experimental substance, and the influences of thermal treatment and cooling methods on the content and existence of Cl in the ash residues were investigated. The characterization of the MSWI bottom-ash samples examined by utilizing X-ray diffraction, optical microscopy, scanning electron microscopy/energy dispersive X-ray spectroscopy. The experimental results show that as a function of thermal treatment, the reduction rate of Cl is slight below 15.0%, which is relatively low compared with water washing process. Different cooling methods had impacts on the existing forms of Cl. It was understood that most of Cl existed in the glass phase if the bottom ash was air cooled. Contrarily in case of water-quenched bottom ash, Cl could also be accumulated in the newly-formed quench products as chloride salts or hydrate substances such as Friedel's salt.

本文言語英語
ページ(範囲)2564-2571
ページ数8
ジャーナルEnvironmental Technology (United Kingdom)
37
20
DOI
出版ステータス出版済み - 10 17 2016

All Science Journal Classification (ASJC) codes

  • 環境化学
  • 水の科学と技術
  • 廃棄物管理と処理

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