Designing wound filters for cleaner water using winding technology: Influence of leading and lagging wind

• Published in: Cleaner Engineering and Technology Vol. 4; p. 100230
• Main Authors: S Kanade, Pragnya, K Chauhan, Janki
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2021; Elsevier
• Subjects: Filtration application; Micron rating; porosity; Precision winding; pressure drop; Wind type; Wind type; pressure drop; Precision winding; Filtration application; porosity; Micron rating
• ISSN: 2666-7908; 2666-7908
• DOI: 10.1016/j.clet.2021.100230

Wound filters are now an integral part of domestic water purification plants. They are used to achieve micro-filtration, and the extent to which they can remove the suspended particles in water is a function of various aspects of winding technology. It includes the wind type, winding mode, porosities of yarn/filter, and its end-use environment. Earlier works have reported the influence of coil angle on filter performance but not the influence of wind type. The present study aimed to produce wound filters at three different coil angles with leading/lagging winds and compare their filtration performances. Results showed that filters wound with the lowest coil angle (@ 20°) with leading wind and lower porosity developed a pressure drop of 5.57 psi with a nominal rating of 72 μm. Filters wound with the lagging wind, and higher porosity produced a pressure drop of 4.8 psi with a micron rating of 56 μm; for similar winding and yarn porosity conditions. A subsequent increase in coil angle resulted in lower pressure drop and more inadequate micron ratings. However, the filters wound with the leading wind always recorded a higher pressure drop for all coil angles. All wound filters’ porosity was different, as their surface area and yarn content affected their pressure drop and micron ratings.