化工进展 ›› 2017, Vol. 36 ›› Issue (01): 378-382.DOI: 10.16085/j.issn.1000-6613.2017.01.049

• 资源与环境化工 • 上一篇    下一篇

富氧燃烧下含油污泥中痕量元素的迁移特性

海云龙, 阎维平   

  1. 华北电力大学能源动力与机械工程学院, 河北 保定 071003
  • 收稿日期:2016-05-12 修回日期:2016-06-15 出版日期:2017-01-05 发布日期:2017-01-05
  • 通讯作者: 阎维平,博士,教授,从事高效低污染煤燃烧理论、新能源开发与利用、电站锅炉煤粉燃烧技术、富氧燃烧等方向的研究。E-mail:yanweiping@263.net。
  • 作者简介:海云龙(1992-),男,硕士研究生,从事富氧燃烧及固体废弃物处理方面研究。E-mail:hdhaiyunlong@126.com。

Trace element migration characteristics of oily sludge in oxygen-enriched combustion

HAI Yunlong, YAN Weiping   

  1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, Hebei, China
  • Received:2016-05-12 Revised:2016-06-15 Online:2017-01-05 Published:2017-01-05

摘要: 在水平管式炉上对含油污泥进行了富氧燃烧实验,采用AFS-933原子荧光分度计对灰渣中痕量元素含量进行测量,研究了燃烧温度、燃烧气氛(O2/CO2气氛和空气气氛)对Hg、As、Pb和Zn等痕量元素迁移特性的影响。实验结果表明:当燃烧温度高于500℃时,Hg的释放率接近100%,燃烧温度和燃烧气氛的变化对Hg的释放影响较小。O2/CO2气氛下,As、Pb、Zn的释放率均随温度的增加而增加,释放率分别由35%、22%、15%增加到65%、40%、16.5%。随着氧浓度的提高,Pb的释放率由34%增加到46%,As的释放率由53%下降到20%,而Zn的释放率呈先增大后减小的趋势,释放率先从14%增加到19%,再下降到15%。空气气氛下As、Pb、Zn的释放率均大于同等温度下21% O2/79% CO2气氛的释放率,释放率分别由54.5%、38%、17%下降到53%、34%、14%。

关键词: 富氧燃烧, 含油污泥, 痕量元素, 迁移特性

Abstract: Oxygen-enriched combustion experiments of oily sludge in the horizontal tube furnace were studied. Trace element content in ash was measured by using AFS-933 atomic fluorescence meter. The migration characteristics of trace elements Hg,As,Pb and Zn was investigated at different temperature and atmosphere(including O2/CO2 and air atmospheres). The results showed that Hg release rate is close to 100% at the temperature above 500℃.The change of combustion temperature and atmosphere has little effect on the release of Hg. In O2/CO2 atmosphere,As,Pb and Zn release rate increases with combustion temperature increase,and the release rate increases from 35%,22%,15% to 65%,40%,16.5%,respectively. Pb release rate increases from 34% to 46% with the increase of oxygen concentration. As release rate decreases from 53% to 20% with the increase of oxygen concentration. Zn release rate first increases and then decreases with the increase of oxygen concentration from 14% to 19% and then to 15%. As,Pb,Zn release rate in air atmosphere is greater than that in 21%O2/79%CO2 atmosphere at the same temperature,and the release rate decreases from 54.5%,38%,17% to 53%,34%,14%,respectively.

Key words: oxygen-enriched combustion, oily sludge, trace element, migration characteristics

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