Visualization of flow during cleaning process on a liquid nanofibrous filter

17th World Textile Conference AUTEX 2017 - Shaping the Future of Textiles

Bilek, P.^1

Department of Nanotechnology and Informatics, Institute for Nanomaterials Advanced Technology and Innovation, Technical University of Liberec, Studentská 1402/2, Liberec

461 17, Czech Republic^1

关键词: Cleaning process;    Filtration process;    Hydrodynamic properties;    Membrane surface;    Nanofibrous membranes;    Optical methods;    Solid particles;    Visualization of flows;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/254/14/142003/pdf
DOI  :  10.1088/1757-899X/254/14/142003

来源: IOP

【 摘 要 】

This paper deals with visualization of flow during cleaning process on a nanofibrous filter. Cleaning of a filter is very important part of the filtration process which extends lifetime of the filter and improve filtration properties. Cleaning is carried out on flat-sheet filters, where particles are deposited on the filter surface and form a filtration cake. The cleaning process dislodges the deposited filtration cake, which is loose from the membrane surface to the retentate flow. The blocked pores in the filter are opened again and hydrodynamic properties are restored. The presented optical method enables to see flow behaviour in a thin laser sheet on the inlet side of a tested filter during the cleaning process. The local concentration of solid particles is possible to estimate and achieve new information about the cleaning process. In the article is described the cleaning process on nanofibrous membranes for waste water treatment. The hydrodynamic data were compared to the images of the cleaning process.