生活垃圾/废PCB板协同焚烧炉渣中氯的存在特性及影响机制

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Abstract The co-incineration of municipal solid waste (MSW) with general industrial solid waste is recognized as a crucial development trend in the waste incineration industry. However, the impact of co-incineration on chlorine distribution within incineration slag remains poorly understood. This study, using a typical industrial printed circuit board (PCB) as the experimental material, investigates the co-incineration process of MSW and waste PCBs. The migration behavior, chemical forms, and long-term stability of chlorine in slag samples under varying waste compositions were determined. The research examines the migration behavior, chemical forms, and long-term stability of chlorine in slag samples under varying waste compositions. The findings demonstrate that the high-temperature decomposition of glass fibers in waste PCBs results in the retention of volatile chlorine in the slag due to the fibers’ large specific surface area. This leads to an overall increase in total chlorine content within the slag, with the proportion of plastics in the waste mixture significantly influencing this process. The water-soluble chlorine content in the co-incinerated slag samples ranged from 50 to 70wt%. Dynamic leaching results revealed that the residual chlorine rate in most slag samples was below 40%. However, as the proportion of waste PCBs increased, the chlorine residue ratio in the slag rose, peaking at 45.6%. This indicates that co-incineration reduces chlorine leaching from the slag.

Key words： municipal solid waste waste PCB incineration incineration bottom slag chlorine

Received: 05 January 2024

PACS:

X705

Corresponding Authors: 古佛全,讲师,gufoquan@zjgsu.edu.cn E-mail: gufoquan@zjgsu.edu.cn

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	SHI Hong-jie
	SHEN Dong-sheng
	LONG Yu-yang
	GU Fo-quan

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SHI Hong-jie,SHEN Dong-sheng,LONG Yu-yang等. Characteristics and influence mechanisms of chlorine existence in municipal solid waste/waste PCB co-incineration bottom slag[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(8): 4407-4414.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I8/4407

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