Deaerator pressure control system
US4819436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1988 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | May 26, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E20/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a steam turbine power plant, a deaerator is heated and pressurized by extraction steam from the steam turbine for the purpose of preheating feedwater to the power plant boiler. Under certain conditions, the available steam to the deaerator is insufficient to adequately maintain pressure in the deaerator leading to steam voids with a rapid rise in deaerator water level which could cause damage to the deaerator, feedwater pumps or the turbine and lead to a power plant shutdown. A second source of steam is available to provide steam under these conditions and a control system for controlling the steam input into the deaerator is shown. Under conditions of falling pressure, if a certain rate is exceeded, the second source of steam is input into the deaerator to maintain adequate pressure for stable operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.