模拟城市生活垃圾热处理过程中Cd与Pb挥发特性研究

于洁; 孙路石; 向军; 胡松; 苏胜; 邱建荣

模拟城市生活垃圾热处理过程中Cd与Pb挥发特性研究

华中科技大学煤燃烧国家重点实验室, 湖北武汉 430074

基金项目: 国家自然科学基金(50976038, 51021065); 湖北省自然科学基金(2009CDB409)。

详细信息

通讯作者:
孙路石, TEL: 027-87544779-8207, E-mail: Sunlushi@hust.edu.cn.

中图分类号: TK09;X705
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- 被引次数: 0
出版历程
- 收稿日期: 2011-11-04
- 修回日期: 2011-01-23
- 刊出日期: 2012-08-31

Volatilization of Cd and Pb during thermal treatment of model solid waste in a fluidized bed incinerator

State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

摘要

摘要: 以Cd与Pb为研究对象,在流化床反应器上对模拟城市生活垃圾Al₂O₃热处理过程中重金属的动力学挥发特性进行了研究。分析了氧化还原条件、H₂O、HCl、SO₂及基体Al₂O₃对重金属的挥发特性影响。研究结果表明,Cd具有较强的挥发性,尤其是在通入HCl的情况下,而Pb的挥发程度则较低,同时氧浓度的增加会降低重金属的挥发。Al₂O₃颗粒中重金属的物理化学吸附以及重金属的扩散效应则同样在一定程度上抵制了重金属的释放,而SO₂的通入则在一定程度上促进了Cd与Pb的释放。
- 重金属 /
- 固体废弃物 /
- 流化床 /
- 挥发特性
Abstract: The Cd and Pb volatilization behavior in model solid waste in a fluidized bed incinerator with Al₂O₃ bed material was investigated. The influence of redox conditions, H₂O, HCl, SO₂ and Al₂O₃ was examined. The results show that Cd has a great volatility, especially when HCl is added, while Pb volatilizes moderately. Increasing the oxygen concentration can lower the heavy metal volatilization. The sorption (either physical or chemical) of Al₂O₃ particles, coupling with the internal diffusion of gaseous metal species, may control the volatilization of heavy metals. When SO₂ is added, Cd and Pb show a higher volatility.
- heavy metals /
- solid waste /
- fluidized bed /
- volatilization behavior

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参考文献(18)

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