新型PTFE熔融喷冲纤维微孔膜滤料制备及除尘机理研究

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Abstract Towards both the problem of poor ash cleaning effect of coated membrane filter material commonly used in metal mine dust treatment and the basic requirements of ultra-low emission of ultra-fine dust, PTFE filter media immersion melt modification method was developed to prepare the melt-jet-punched fiber microporous membranes with a wide range of adaptability and low resistance and efficiency. PTFE melt-punched fiber microporous membrane production process was combined with the FE-SEM fiber structure recombination CFD-DEM coupling numerical simulation technology method, via which the filtration characteristics and dust removal surface characteristics of the microporous membrane filter material were analyzed. The results show that the fiber microporous membrane filter material made by pressure impregnation dyeing and heating baking treatment could provide the fine sericillary structure on the PTFE spray wire skeleton, which increased both the filling rate of the filter material (SVF) and the filtration efficiency of ultra-fine dust, especially for the third group of filter materials, the dust removal efficiency of fine particulate matter below PM₁₀ was increased from 95.5% to 99.3%. We further verified the physical properties of the filter media by numerical simulation, and analyzed the microscopic dust removal performance and dust adhesion state distribution of the new filter media by combining FE-SEM microscopic dust adhesion state distribution.

Key words： molten spray fiber microporous membrane filter material performance numerical simulation CFD-DEM efficiency of classification

Received: 25 August 2022

PACS:

X701

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	Articles by authors
	CHEN Yi-hua
	QIU Shu-yong
	GUO Jing-zhong
	Lü Zhen-hu
	WANG Pan
	JIA Yong

Cite this article:

CHEN Yi-hua,QIU Shu-yong,GUO Jing-zhong等. Research on the preparation and dust removal mechanism of new PTFE melt-punched fiber microporous membrane filter media[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(3): 1064-1073.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I3/1064

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