我国典型垃圾焚烧飞灰物化特性对比

Physicochemical Characteristics of Typical Fly Ashes of Solid Waste Incineration Plants in China

摘要:

对我国不同地区生活垃圾焚烧厂焚烧飞灰的物理、化学特性进行了分析研究，探讨了飞灰中总氯、可溶氯含量以及重金属分布与原始垃圾组分的相关性，结果表明，飞灰中重金属的含量与进厂原始垃圾的组成及垃圾收集方式密切相关；飞灰中所含氯的质量分数高达5.21%～14.49%，其中可溶氯占总氯质量的40.60%～83.96%；不同城市焚烧飞灰中氯的含量差异较大，经济发展水平较高的城市焚烧飞灰中氯的含量也相对较高，厨余垃圾所占比例是影响飞灰中氯（特别是可溶氯）含量的重要因素.

Abstract:

An analysis was made of the physicochemical characteristics of fly ashes from seven municipal solid waste incinerators (MSWIs) in China. Based on the analysis of these characteristics, the relationship between the components of raw refuse and total/soluble chlorine content, heavy metals distribution of fly ashes was discussed. The results show that heavy metal contents of fly ashes have close correlation with the components of raw refuse and refuse collection mode. Fly ashes have a high chlorine level (5.21%~14.49%) and soluble chlorine contributed 40.60%~83.96% to the total chlorine. Chlorine shows wide range content in different incineration plant, the fly ash of incineration plant from city on a comparatively developed economic level tends to have higher level of chlorine. The chlorine (especially soluble chlorine) in fly ash is mainly from kitchen wastes.