公开(公告)号：US09617874B2

公开(公告)日：2017-04-11

申请号：US13919259

申请日：2013-06-17

Applicant: ALSTOM Technology Ltd

Inventor： Stephan Hellweg ,  Volker Schüle ,  Manfred Bauer

IPC: F01K11/02 ,  F01K7/24 ,  F01K7/34 ,  F01K7/40 ,  F01K13/02

CPC classification number: F01K7/24 ,  F01K7/345 ,  F01K7/40 ,  F01K13/02

Abstract: In a system for effecting pressure control in a thermal power plant operated at low load connected fluidly in series, a relief conduit is disclosed herein. The relief conduit selectively transfers steam from a cold reheat conduit to the second extraction conduit. The plant further includes a boiler, a high-pressure turbine, an intermediate pressure turbine, a low pressure turbine, a main steam conduit for feeding steam from the boiler to an inlet of the high pressure turbine, a cold reheat conduit for feeding steam from an outlet of the high-pressure turbine through a reheat flow path in the boiler, and a first and second high pressure heaters. A first extraction conduit connects the cold reheat conduit to a first high pressure heater to transfer heat, and a second extraction conduit connects the intermediate pressure turbine to the second high pressure heater, to transfer heat.