再生铜冶炼过程多氯萘与二噁英类排放特征分析与控制技术评估

Assessment of Emission and Co-Reduction of PCDD / Fs and PCNs in the Secondary Copper Production Sector

多氯萘(PCNs)和二噁英类(PCDD/Fs)化合物可在再生铜生产过程中无意产生和排放,对其排放关键节点和相关因素分析可为PCNs和PCDD/Fs的协同控制提供科学依据.本研究通过对再生铜的关键生产工艺分析,监测PCNs和PCDD/Fs的排放水平,辨识排放的关键生产环节,筛选可行的协同减排技术,从而提出再生铜生产过程中PCNs和PCDD/Fs协同减排的技术措施和控制建议.研究结果可为我国履行《关于持久性有机污染物(POPs)的斯德哥尔摩公约》和开展再生铜行业无意产生的POPs减排提供决策支撑.

Polychlorinated naphthalenes( PCNs) could be generated and discharged unintentionally in the secondary copper production industry with similar mechanisms as PCDD / Fs during high-temperature industrial processes. Therefore,measures that reduce the release of PCDD / Fs will also reduce PCNs emissions. Analysis of the technical process and correlation with their emissions will provide theoretical basis for co-mitigation of PCNs and PCDD / Fs. The production process of secondary copper was analyzed,with key production stages of discharge identified through monitoring the emissions of two kinds of pollutants. Co-reduction technologies were screened and specified. Three recommendations on co-mitigation of the two pollutants were provided to support the implementation of Stockholm Convention and UPOPs reduction in the secondary copper production sector in China.