Method for operating a system for steam generation, and steam ge

Details Method for operating a system for steam generation, and steam ge Method for operating a system for steam generation, and steam ge

1993-03-16

1994-03-15

Favors, Edward G.

Liquid heaters and vaporizers

Industrial

Waste heat

122 1C, 122421, 122422, F22D 100

Patent

active

052938425

ABSTRACT:
A method for operating a system for steam generation includes generating steam from water by indirect heat exchange with hot flue gas, by first preheating condensed water and then evaporating the preheated water at high pressure. The method further includes cooling the preheated water which is already at high pressure, by heat exchange with at least one partial flow of the condensed water, at least in a partial-load range. A system for steam generation, such as in a gas and steam turbine plant, includes a steam generator through which hot flue gas flows. The steam generator has heating surfaces. One of the heating surfaces is a condensate preheater having primary and secondary sides. A heat exchanger is connected downstream of the condensate preheater on the primary side and is connected upstream of the condensate preheater on the secondary side.

REFERENCES:
patent: 4489679 (1984-12-01), Holt
patent: 4617878 (1986-10-01), Paguet
patent: 4693213 (1987-09-01), Yanai et al.
patent: 4858562 (1989-08-01), Arakawa et al.

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