Spiral wound membrane element and method for cleaning spiral wound membrane sheet
US10335739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2012 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Jul 7, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2321/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A spiral wound membrane element and a method for cleaning a spiral wound membrane sheet are provided. The spiral wound membrane element comprising a perforated central tube; one or more membrane sleeves, each sleeve comprising two membrane sheets enclosed at two edges around a feed spacer sheet and wrapped around the central tube; a permeate carrier sheet attached to the central tube at a first edge opposite a second edge; and a seal on third and fourth edges of the permeate carrier sheet. The method comprises introducing two solution with different solute concentration to two sides of the spiral wound membrane sheet; establishing a concentration gradient between the first and second sides; communicating a first solvent from the first side to the second side to remove a foulant located on the second side of the membrane sheet; and collecting a waste stream that contains the foulant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.