The volatilization of heavy metals during co-combustion of food waste and polyvinyl chloride in air and carbon dioxide/oxygen atmosphere
The volatilization of heavy metals during co-combustion of food waste and polyvinyl chloride in air and carbon dioxide/oxygen atmosphere
复制标题
餐厨垃圾与聚氯乙烯在空气和二氧化碳/氧气气氛中共燃烧过程中重金属的挥发
DOI：
10.1016/j.biortech.2017.08.075
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发表时间：
2017-11-01
影响因子：
11.4
通讯作者：
Wu, Zhendong
中科院分区：
文献类型：
--
作者：
Ke, Chuncheng;Ma, Xiaoqian;Wu, Zhendong
在实验室管式炉中研究了餐厨垃圾与PVC及其混合物在N2/O2和CO2/O2气氛下燃烧过程中Cd、Cr和Zn 3种重金属的挥发规律。在大多数情况下，燃烧灰中的重金属浓度随炉膛温度的升高而降低。80 CO（2）/20 O（2）替代80 N（2）/20 O（2）降低了Cd和Cr的挥发速率，但增加了Zn的挥发速率。随着PVC添加量的增加，焚烧灰中Zn的含量降低，添加5%PVC降低了Cr的挥发率，但添加15%PVC则使Cr的挥发率增加。在70 CO（2）/30 O（2）条件下，Zn的挥发速率显著低于85 CO（2）/15 O（2）和80 CO（2）/20 O（2）条件。研究结果有助于了解垃圾焚烧过程中重金属的挥发规律和富氧燃烧的污染控制。
The volatilization of three heavy metals (Cd, Cr and Zn) during food waste and PVC and their blending combustion in N-2/O-2 or CO2/O-2 atmosphere in a lab-scale tubular furnace was investigated. The concentration of heavy metals in combustion ash was decreased with the increment of furnace temperature in most cases. The replacement of 80N(2)/20O(2) by 80CO(2)/20O(2) decreased the volatilization rate of Cd and Cr, but increased Zn. The increased amount of PVC added into food waste led to less content of Zn in combustion ash, 5% PVC added into food waste decreased the volatilization rate of Cr but 15% PVC added led to the higher volatilization. The volatilization rate of Zn in 70CO(2)/30O(2) was significantly lower than in 85CO(2)/15O(2) or 80CO(2)/20O(2). The result contributes to the understanding of heavy metal volatilization during incineration and emission control of MSW oxy-fuel combustion.