Title:
CERAMIC FILTER MEMBRANE WITH MEMBRANE THICKNESS IN GRADIENT DISTRIBUTION, AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/068110
Kind Code:
A1
Abstract:
Disclosed are a ceramic filter membrane with a membrane thickness in a gradient distribution, and a preparation method therefor. The pure water flux of the ceramic filter membrane is 2100-2800 LMH under a pressure of 0.1 MPa. The ceramic filter membrane comprises a ceramic membrane support body and a ceramic membrane layer arranged on the surface of the ceramic membrane support body, wherein the thickness of the ceramic membrane layer gradually decreases in the direction from a feeding end to a discharging end, and gradually decreases from 35-55 μm to 8-25 μm; and the ceramic membrane layer has a porosity of 32-40% and a pore size of 80-300 nm. In the present invention, the position of the ceramic membrane layer where the thickness is larger is used as the feeding end and has a large filtration resistance, and the position of the ceramic membrane layer where is the thickness is smaller is used as the discharging end and has a small filtration resistance, so that the problems of high pressure at a feeding port, low pressure at a discharging port, uneven membrane flux and membrane pollution, and the low effective utilization rate of a membrane during cross flow filtration are solved.
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Inventors:
QIU ZHUGUO (CN)
HONG YUBIN (CN)
FANG FULIN (CN)
LAN WEIGUANG (CN)
HONG YUBIN (CN)
FANG FULIN (CN)
LAN WEIGUANG (CN)
Application Number:
PCT/CN2020/140326
Publication Date:
April 07, 2022
Filing Date:
December 28, 2020
Export Citation:
Assignee:
SUNTAR MEMBRANE TECHNOLOGY XIAMEN CO LTD (CN)
International Classes:
B01D71/02; B01D67/00; B01D69/10
Foreign References:
| US20030070981A1 | 2003-04-17 | |||
| CN101721921A | 2010-06-09 | |||
| CN103497002A | 2014-01-08 | |||
| JP2005270809A | 2005-10-06 | |||
| JP2006263517A | 2006-10-05 |
Attorney, Agent or Firm:
SHOUCHUANG JUNHE PATENT AGENT CO., LTD. XIAMEN (CN)
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