Deaerator pressure control system

Details Deaerator pressure control system Deaerator pressure control system

1988-05-26

1989-04-11

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Having apparatus cleaning, sealing, lubricating, purging,...

60660, 60677, 60678, F01K 1302, F01K 734

Patent

active

048194360

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.

REFERENCES:
patent: 3300974 (1967-01-01), Reed et al.
patent: 4099384 (1978-07-01), Stevens et al.
patent: 4345438 (1982-08-01), Labbe et al.
patent: 4402183 (1983-09-01), Dimitroff et al.
patent: 4474012 (1984-10-01), Chamberlain

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