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US 5,687,674 AGranted
Steam power plant for generating electric power
AssigneeSaarbergwerke Aktiengesellschaft
InventorsUwe Johanntgen, Franz Josef Marx
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AssigneeSaarbergwerke Aktiengesellschaft
InventorsUwe Johanntgen, Franz Josef Marx
Estimating the term…
A steam power plant for generating electric power has a fossil-fuelled boiler, a water-steam cycle for generating high-tension, superheated steam for a steam turbine, an economizer to transmit heat from flue gas to the feed-water, an air preheater to transmit flue gas heat to fresh air and devices for removing dust, sulphur and possibly nitrogen from the flue gases. In order to optimize heat exchange in the air preheater during operation and reduce the heat loses during start-up of the steam power plant, a heat exchanger system is provided with sections through which recirculated air and a heat vehicle medium flow, in which the section carrying the air is connected on the intake side to the fresh-air outlet of the air preheater and on the outlet side to the fresh-air intake of the air preheater.
A steam power plant for generating electric power has a fossil-fuelled boiler, a water-steam cycle for generating high-tension superheated steam for a steam turbine, an economizer to transmit heat from flue gas to the feed-water, an air preheater to transmit flue gas heat to fresh air, and devices for removing dust, sulphur and possibly nitrogen from the flue gas and is characterized in that it has a first heat exchanger system (16, 17) with a section through which recirculated air and a heat vehicle medium flow, whereby the section carrying the air is connected on the intake side (14) to the fresh-air outlet of the air preheater (4) and on the outlet side (13) to the fresh-air intake of the air preheater (4).
Dependencies are inferred from the claim text.