FIELD: power engineering.
SUBSTANCE: invention relates to power engineering. A steam gas plant comprises a gas turbine plant, a boiler-utiliser, a steam turbine plant, a discharge gas flue, a stack, connecting pipelines, an external gas flue, a burner device and a steam reheater connected to the external gas flue. The boiler-utiliser and the steam reheater comprise modules of heating surfaces of a steam and water circuit of the steam gas plant. The external gas flue is made in the form of a recirculation circuit equipped with a fan. The outlet of the external gas flue is connected to a boiler-utiliser in the zone of placement of heating surface modules, and the outlet is taken out upstream the zone of placement of modules of boiler-utiliser heating surfaces.
EFFECT: invention makes it possible to increase efficiency of using heat of gaseous combustion products and efficiency of a plant.
11 cl, 1 dwg
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