Method and configuration for deaerating a condensate

Details Method and configuration for deaerating a condensate Method and configuration for deaerating a condensate

1997-11-17

1999-05-18

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 39182, F02C6/18

Patent

active

059040394

ABSTRACT:
Condensate of a combined-cycle gas and steam turbine plant is deaerated. The condensate is heated in a feedwater tank to which preheated condensate is supplied. The condensate is preheated in a waste-steam generator heated by waste heat of the gas turbine. Feedwater is extracted and warmed in heating surfaces connected in the water/steam loop of the steam turbine and heated by the exhaust gas from the gas turbine. In order to guarantee adequate deaeration of the condensate at a simultaneously high efficiency of the plant through especially high energy utilization of the waste heat from the gas turbine, a partial flow of the preheated condensate or a partial flow of preheated feedwater is used as heating medium for heating the condensate. A low-pressure economizer is connected downstream of a condensate preheater in the waste-heat steam generator via a feedwater tank. The condensate preheater or the low-pressure economizer have at their outlet an outflow line leading into the feedwater tank.

REFERENCES:
patent: 4354347 (1982-10-01), Tomlinson
patent: 4961311 (1990-10-01), Pavel et al.
patent: 4976100 (1990-12-01), Lee
patent: 5251432 (1993-10-01), Bruckner et al.
Japanese Patent Abstract No. 55109708 (Seisakusho), dated Aug. 23, 1980.

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