Power plant feedwater system

Patent · Tue Dec 31 04:00:00 EST 1985

OSTI ID:5694595

Silvestri, G

A feedwater heater system for a steam turbine power plant is provided which incorporates a liquid-to-liquid heat exchanger in addition to a plurality of vapor-to-liquid feedwater heaters. The advantage of this configuration is that the potential magnitude of entrained impurities within the feedwater stream is reduced without a significant increase in the overall heat rate of the steam turbine power plant. A preferred embodiment of the present invention incorporates three low pressure feedwater heaters and two high pressure feedwater heaters in conjunction with a drain cooler which is connected serially between the low and high pressure feedwater heaters. An alternative embodiment of the present invention incorporates a liquid-to-liquid heat exchanger connected hydraulically in parallel with the low pressure feedwater heaters. In both embodiments of the present invention, the liquid-to-liquid heat exchanger of the present invention receives the drain water from a reheater, such as a moisture separator-reheater, and exhausts this liquid to a condenser of the steam turbine power plant.

• Assignee: Westinghouse Electric Corp.
• Patent Number(s): US 4561255
• OSTI ID: 5694595
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200101* -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
BOILERS
CONDENSERS
DESIGN
ENTRAINMENT
FEEDWATER
FEEDWATER HEATERS
HEAT EXCHANGERS
HEATERS
HYDROGEN COMPOUNDS
IMPURITIES
MACHINERY
OXYGEN COMPOUNDS
POWER PLANTS
REMOVAL
SEPARATION EQUIPMENT
STEAM CONDENSERS
STEAM GENERATORS
STEAM SEPARATORS
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VAPOR CONDENSERS
VAPOR GENERATORS
VAPOR SEPARATORS
WATER