Process for feed-water oxygenating treatment in boiler in power station
US9714179B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2012 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Nov 21, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B1/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a process of oxygenated feed-water treatment of boilers in power station, carried out under an OT treatment process, suitable for both the monotube type boiler and the drum type boiler, and comprising an oxygenation stage comprising: a normal oxygenation converting stage and a decreased oxygenation film-supplementing stage; the normal oxygenation converting stage is a stage in which the feed water system is oxygenated both at the outlet of a condensate polishing system and at the inlet of a feed water pump of a high pressure feed water system, and the concentration of dissolved oxygen in the main steam is controlled to be ≦5 μg/L; the decreased oxygenation film-supplementing stage is a stage in which, after an oxide film is formed in the feed water system, the amount of oxygenation at the high pressure feed water system is decreased so that the amount of the oxygen added is only for supplementing and maintaining the oxide film, while the concentration of dissolved oxygen in the main steam is controlled to be ≦5 μg/L. It can ensure that a dense protection film can be formed and maintained on the metal surface of the pipes in a feed water system, thereb…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.