Split flow EDI apparatus for treating second pass RO permeate water with high flow rate
US9095822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2011 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Mar 10, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
We report an electro-deionization (EDI) device having split flow arrangement for the purification of second pass RO permeate water with high flow rate in which the feed water is fed through the center port and is diverted into each section of dilute chamber with equal flow rate, producing two product streams. The EDI device has concentrate chambers adjacent to dilute chambers in two sections of the stack, allowing independent flow through the separate sections. The split flow design reduces resin bed depth requirement for processing of second pass RO permeate water. This results in higher flow rate through the stack, elimination of the pressure drop limitation, and reduction of power consumption per unit volume of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.