Title:
HIGH FILTRATION FILTER WITH DISINFECTION, LOW PRESSURE DROP AND REDUCED CAKE FORMATION
Document Type and Number:
WIPO Patent Application WO/2022/011689
Kind Code:
A1
Abstract:
A high filtration filter for filtering aerosols with low pressure drop across the filter and reduced cake formation when the aerosols penetrate through from an upstream side to a downstream side is disclosed. The filter (100) includes a plurality of module layers (110) and a plurality of separators (120). An individual module layer is an electrostatically-charged polyvinylidene fluoride (PVDF) nanofiber mat. The electrostatically-charged PVDF nanofiber mat with charged nanofibers is configured to better capture aerosols. The plurality of module layers and the plurality of separators are alternatingly stacked and connected to one another. Each of the individual module layers has an appropriate fiber basis weight, thereby the aerosols are captured by the charged nanofibers and distributed uniformly across an entire width of the filter from the upstream side (41) to the downstream side (42). The fiber basis weight of nanofibers is selected to minimize the formation of skin leading to formation of a cake layer on the upstream side of the filter module. The filter also carries antimicrobials to disinfect bacteria, viruses, and harmful microbials carried by the trapped aerosols in the filter.
More Like This:
Inventors:
LEUNG WALLACE (CN)
Application Number:
PCT/CN2020/102725
Publication Date:
January 20, 2022
Filing Date:
July 17, 2020
Export Citation:
Assignee:
UNIV HONG KONG POLYTECHNIC (CN)
International Classes:
B01D39/16; B01D67/00
Domestic Patent References:
| WO2019200956A1 | 2019-10-24 |
Foreign References:
| CN102872653A | 2013-01-16 | |||
| CN104689641A | 2015-06-10 | |||
| US20150053080A1 | 2015-02-26 |
Other References:
LEUNG WALLACE WOON-FONG, QIANGQIANG SUN: "Charged PVDF multilayer nanofiber filter in filtering simulated airborne novel coronavirus (COVID-19) using ambient nano-aerosols", SEPARATION AND PURIFICATION TECHNOLOGY, vol. 245, 22 April 2020 (2020-04-22), XP055887454, DOI: 10.1016/j.seppur.2020.116887
LEUNG, W.W.F. ; HUNG, C.H. ; YUEN, P.T.: "Effect of face velocity, nanofiber packing density and thickness on filtration performance of filters with nanofibers coated on a substrate", SEPARATION AND PURIFICATION TECHNOLOGY, ELSEVIER SCIENCE, AMSTERDAM, NL, vol. 71, no. 1, 29 January 2010 (2010-01-29), NL , pages 30 - 37, XP026836599, ISSN: 1383-5866
LEUNG, W.W.F. ; HUNG, C.H. ; YUEN, P.T.: "Effect of face velocity, nanofiber packing density and thickness on filtration performance of filters with nanofibers coated on a substrate", SEPARATION AND PURIFICATION TECHNOLOGY, ELSEVIER SCIENCE, AMSTERDAM, NL, vol. 71, no. 1, 29 January 2010 (2010-01-29), NL , pages 30 - 37, XP026836599, ISSN: 1383-5866
Attorney, Agent or Firm:
BEIJING PAT SF INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
Download PDF:
Previous Patent: CONNECTING APPLICATION TO MULTIPLE CONCURRENT NETWORK SLICING INSTANCES
Next Patent: SELF-SUPERVISED LEARNING METHOD AND APPLICATION
Next Patent: SELF-SUPERVISED LEARNING METHOD AND APPLICATION