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在循环流化床城市固体废物焚烧炉中,PCDD/F和PCB在不同位置的分布

Mengmei Zhang¹, Takashi Fujimori², Xiaoqing Lin³

¹Nanxun Innovation Institute, Zhejiang University of Water Resources and Electric Power, Hangzhou, 310018, China. zhangmm@zju.edu.cn.

Environmental science and pollution research international

|January 5, 2024

概括

这项研究发现,在循环流化床焚烧炉中,多二-p-二氧化物,二福兰 (PCDD/F) 和双 (PCB) 会增加烟气和灰. 飞灰的特性,特别是碳和含量,与二氧化物形成相关.

科学领域:

环境化学环境化学
化学工程是化学工程的重要组成部分.
污染控制污染控制

背景情况:

焚烧过程可以产生持久性有机污染物,如多二二二氧化物 (PCDD),二福兰 (PCDF) 和双 (PCB).
了解这些污染物的形成和分布对于废物转化电厂的有效排放控制至关重要.

研究的目的:

在循环流化床 (CFB) 焚烧厂内的不同地点调查烟气和灰中PCDD/F和PCB的度和形成途径.
探索飞灰组成和这些污染物的产生之间的关系.

主要方法:

在CFB焚烧厂的五个下游地点采集烟雾气和灰的样本,覆盖了各种温度范围.
使用已确定的分析技术分析PCDD/F和PCB度.
飞灰的元素组成分析和统计分析 (主要成分分析 - PCA) 以将污染物水平与灰属性相关联.

主要成果:

烟气和灰中的PCDD/F和PCB度从超热器到空气污染控制系统 (APCS) 显著增加.
二氧化类PCB (dl-PCB) 与PCDD/F的相关性比总PCB的相关性更强,这表明形成机制类似.
飞灰显示PCDD/F,PCB和碳 (C) 和 (Cl) 含量之间的正相关性,表明飞灰作为二氧化形成的反应表面.

结论:

飞灰的组成,特别是碳和含量,在CFB焚烧炉中PCDD/F和PCB的低温形成中起着重要作用.
这些发现强调了在优化焚烧厂排放控制策略时考虑飞特性的重要性.

关键词:

循环流体化床 (CFB) 是一种流体化床.元素组成元素组成.他们的指纹是指纹.烟雾气体的使用情况飞行灰的飞行灰多双 (PCB) 是一种多化合物.聚化二子-p-二氧化和二酸 (PCDD/Fs)

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