Pretreatment of metallurgical sewage via vacuum distillation driven by low-temperature exhausted gas from steel plants

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	Pretreatment of metallurgical sewage via vacuum distillation driven by low-temperature exhausted gas from steel plants
其他题名	Pretreatment of metallurgical sewage via vacuum distillation driven by low-temperature exhausted gas from steel plants
	Wang Lianyong 1; Liu Chao 2; Ye Zhu 1; Sun Wenqiang 1
	2018
发表期刊	JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN	1006-706X
卷号	25 期号:3 页码:291-297
摘要	The metallurgical sewage has very complex component and a significant environmental perniciousness and needs high treatment costs. In addition, too much low-temperature waste heat is emitted owing to the lack of suitable users. Considering these concerns, a low-temperature-driven pretreatment method via vacuum distillation was proposed to treat the sewage from the metallurgical production. It uses the sensible heat carried by low-temperature exhausted gases to drive the distillation of sewage. The distilled water can be reused into the process as new water supply, while the enriched wastewater is discharged into the sewage treatment center for subsequent treatment. Converter dust removal sewage was chosen to perform an experimental observation. The variations of chemical oxygen demand, ammonia nitrogen, suspended solids, electrical conductivity, and pH of the condensate under different vacuum degrees and evaporation rates were mainly investigated. It can be found that the quality of the condensate gets better under certain conditions, which validates the feasibility of the proposed approach. Furthermore, by comprehensively analyzing the water quality indices and their influencing factors, the optimal vacuum degree was suggested to be controlled between 0.07 and 0.09 MPa, and the best evaporation rate was between 40 and 60%.
其他摘要	The metallurgical sewage has very complex component and a significant environmental perniciousness and needs high treatment costs. In addition, too much low-temperature waste heat is emitted owing to the lack of suitable users. Considering these concerns, a low-temperature-driven pretreatment method via vacuum distillation was proposed to treat the sewage from the metallurgical production. It uses the sensible heat carried by low-temperature exhausted gases to drive the distillation of sewage. The distilled water can be reused into the process as new water supply, while the enriched wastewater is discharged into the sewage treatment center for subsequent treatment. Converter dust removal sewage was chosen to perform an experimental observation. The variations of chemical oxygen demand, ammonia nitrogen, suspended solids, electrical conductivity, and pH of the condensate under different vacuum degrees and evaporation rates were mainly investigated. It can be found that the quality of the condensate gets better under certain conditions, which validates the feasibility of the proposed approach. Furthermore, by comprehensively analyzing the water quality indices and their influencing factors, the optimal vacuum degree was suggested to be controlled between 0.07 and 0.09 MPa, and the best evaporation rate was between 40 and 60%.
关键词	WASTE HEAT INDUSTRY WATER Metallurgical sewage Vacuum distillation Low-temperature waste heat Steel plant
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [China Scholarship Council] ; [Fundamental Research Funds for the China Central Universities]
CSCD记录号	CSCD:6311128
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/157339
专题	中国科学院金属研究所
作者单位	1.东北大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Wang Lianyong,Liu Chao,Ye Zhu,et al. Pretreatment of metallurgical sewage via vacuum distillation driven by low-temperature exhausted gas from steel plants[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2018,25(3):291-297.
APA	Wang Lianyong,Liu Chao,Ye Zhu,&Sun Wenqiang.(2018).Pretreatment of metallurgical sewage via vacuum distillation driven by low-temperature exhausted gas from steel plants.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,25(3),291-297.
MLA	Wang Lianyong,et al."Pretreatment of metallurgical sewage via vacuum distillation driven by low-temperature exhausted gas from steel plants".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 25.3(2018):291-297.