Upward-flow manganese contact column
US7922904B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2007 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Aug 3, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides an upward-flow manganese contact column for feeding raw water to a manganese catalyst-packed layer through a plurality of dispersion nozzles provided at the upper surface of a chamber by forming the chamber for allowing raw water to flow in at the bottom of a column body into which a granular manganese catalyst is packed. Each dispersion nozzle has an umbrella portion above a perpendicular nozzle body, and the umbrella portion is configured so that the lower end of the umbrella portion is elongated below the upper end of the nozzle body. Raw water is supplied to the entire manganese catalyst-packed layer from the lower end of the umbrella portion of each dispersion nozzle. It is capable, of exhibiting stable treatment ability for a long time by suppressing particles of the manganese catalyst from being worn by collisions of the particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.