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经济化剂对固体废物焚烧厂烟气中PCDD/F的缓冲效应

Jia-Wei Lu¹, Yingshi Xie¹, Bing Xie¹

¹South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China; Guangdong Province Engineering Laboratory for Solid Waste Incineration Technology and Equipment, Guangzhou 510330, China.

Waste management (New York, N.Y.)

|May 28, 2023

概括

固体废物焚烧炉在节约器中具有令人惊的"缓冲效应",可以去除80%以上的二氧化和 furan (PCDD/F). 这种由凝结驱动的过程减少了本节关于PCDD/F形成的担忧.

科学领域:

环境科学与工程环境科学与工程
化学工程是化学工程的重要组成部分.
污染控制技术污染控制技术

背景情况:

固体废物焚烧产生的多二二氧化和二二 (PCDD/Fs) 排放是一个严重的环境问题.
关于在焚烧炉的经济化阶段PCDD/F的形成和迁移的了解有限.
在烟气清洗之前,经济化剂在PCDD/F控制中的作用需要进一步调查.

研究的目的:

研究PCDD/Fs在固体废物焚烧炉的经济化器中的形成和迁移机制.
确定和描述经济化剂对PCDD/Fs的"缓冲效应".
通过经济化器修改来评估加强PCDD/F控制的潜力.

主要方法:

分析了36组在三个典型条件下运行的焚烧炉的实验数据.
对烟气中的PCDD/F概况和度的研究.
在经济化器中评估凝结,拦截和释放效应.

主要成果:

在经济化器中观察到显著的"缓冲效应",与已知的"记忆效应"相反.
这种缓冲效应,包括拦截和释放,平均去除了82.9%的PCDD/Fs.
由凝结规律驱动的拦截占主导地位,低化PCDD/F在高化PCDD/F之后凝结.

结论:

在节约器中PCDD/F的形成是罕见的;观察到的去除主要是由于物理迁移和凝结.
节约器的缓冲效应,特别是凝结,在下游处理之前有效降低PCDD/F负载.
优化节约器中的冷凝可以减轻管道末端污染控制措施的负担.

关键词:

凝结凝结的情况经济化器经济化器多相动作流的多相动作流.在PCDD/Fs中.在QSAR中使用QSAR.

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