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

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