Deionization method and apparatus
US4427549A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1982 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Aug 19, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J49/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A deionization method and apparatus comprising separate cation and anion removing sections 10a, 10b, the cation section having separate tanks 14, 16 and the anion section having separate tanks 24, 26. Respective cation and anion control valve assemblies 18, 28 control the fluid communication between various components of respective sections and control the regeneration cycle of exhausted cation and anion tanks, respectively. Each valve assembly includes independent water usage monitoring devices 118 which, upon sensing a predetermined quantity of water discharge by its respective valve assembly, effects regeneration of an associated tank. An exhausted cation tank is regenerated by feeding cation regeneration fluid by way of the cation control valve assembly into the exhausted cation tank in a counterflow direction for a predetermined time. Decationized water from the on-line cation tank is then passed through the exhausted cation tank in a counterflow direction to effect a counterflow rinse. An exhausted anion tank is similarly regenerated using an anion regeneration fluid and passing it through the exhausted tank in a counterflow direction, followed by a counterflow rinse using de…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.