Apparatus for improving city water
US5525224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Nov 8, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention lies in a method of improving a Langelier index and pH of city water wherein undissolved matter (calcium carbonate and slaked lime covered with calcium carbonate) slurry produced in a slaked lime dissolving vessel is mixed and reacted with carbonic acid-containing water in a mixing and reacting vessel to make a calcium hydrogen carbonate aqueous solution so as to continuously add to water in a water-receiving vessel together with a slaked lime aqueous solution, with which a utilization percentage of undissolved matter which has hitherto had a low utilization percentage is increased, and the Langelier index can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.