垃圾焚烧飞灰中重金属的热稳定化条件及机理

钟山; 冯经昆; 陈阳; 邝薇; 盘静; 咸思雨; 刘元元

垃圾焚烧飞灰中重金属的热稳定化条件及机理

钟山^1,,
冯经昆¹,
陈阳¹,
邝薇^1,2,
盘静^1,2,
咸思雨¹,
刘元元³

1.
广西师范大学环境与资源学院, 广西桂林 541004;
2.
桂林市排水工程管理处, 广西桂林 541002;
3.
重庆大学城市建设与环境工程学院, 重庆 400044

基金项目: 国家自然科学基金（51108100）；广西自然科学基金（2013GXNSFBA019249）；广西教育厅科研项目（200103YB020）；广西师范大学博士启动基金项目。

详细信息

通讯作者:
钟山（1980- ），男，副教授，博士，从事固废与水处理方面研究，Tel：13397836813，E-mail：11271947@qq.com。

中图分类号: X705
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出版历程
- 收稿日期: 2013-04-11
- 修回日期: 2013-06-17
- 刊出日期: 2013-12-30

Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration

1.
College of Environment and Resources, Guangxi Normal University, Guilin 541004, China;
2.
Guilin Wastewater Engineering Management Department, Guilin 541002, China;
3.
College of Municipal and Environment Engineering, Chongqing University, Chongqing 400044, China

摘要

摘要: 研究了生活-农业混合型垃圾焚烧飞灰与单一生活垃圾焚烧飞灰（简称混合型飞灰与单一型飞灰）热处理过程中的重金属挥发特性与稳定化效果，并结合FT-IR、XRD检测手段对稳定化机理进行了探讨。结果表明，单一型飞灰中重金属的挥发性普遍高于混合型飞灰，垃圾源氯含量对重金属的挥发性有明显影响。飞灰中Mn、Cr不易挥发，Zn、Cu较易挥发，Pb、Cd挥发性很强，热处理温度超过1 000 ℃时挥发率都超过50%。800 ℃为相对最优的热处理温度，兼顾了热处理过程重金属稳定化与抑制挥发。800 ℃以上时飞灰形成了稳定的硅酸盐结构体系，是重金属热处理后难以浸出的主要机理。
- 垃圾焚烧 /
- 热处理 /
- 稳定化 /
- 挥发
Abstract: The volatility and the stabilization of heavy metals in fly ash in municipality & agriculture mixed waste incineration(Type A) and municipal solid waste incineration(Type B) were investigated. And the heavy metals stabilization mechanism was studied by using FT-IR and XRD. The results indicate that the volatility of heavy metals is higher in type B than that in type A, and is significantly affected by the content of chloride in waste source. The volatility of heavy metals in fly ash varies in a sequence of Mn, Cr < Zn, Cu < Pb, Cd. More than 50% of Pb and Cd are volatilized when the temperature exceeds 1 000 ℃. The relatively optimal thermal treatment temperature is 800 ℃and the heavy metals stabilization is higher and the evaporation rate is lower. The primary mechanism of heavy metals stabilization is the formation of stable silicate structure system above 800 ℃.
- solid waste incineration /
- thermal treatment /
- stabilization /
- evaporation

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参考文献(17)

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