公开(公告)号：US09605564B2

公开(公告)日：2017-03-28

申请号：US14488344

申请日：2014-09-17

Applicant: ALSTOM Technology Ltd

Inventor： Wolfgang Franz Dietrich Mohr ,  Hamid Olia ,  Miguel Angel Carrillo Rubio ,  Juergen Reinhard

IPC: F01K13/02 ,  F01D21/00 ,  F01D19/00 ,  F01K23/10 ,  F01K9/02 ,  F01K9/00

CPC classification number: F01K13/02 ,  F01D19/00 ,  F01D21/00 ,  F01K9/003 ,  F01K9/023 ,  F01K23/10 ,  Y02E20/16

Abstract: The invention relates to a method for operating a steam power plant, particularly a combined cycle power plant, which includes a gas turbine an a steam/water cycle with a heat recovery steam generator, through which the exhaust gases of the gas turbine flow, a water-cooled condenser, a feedwater pump and a steam turbine. A cooling water pump is provided for pumping cooling water through said water-cooled condenser. Evacuating means are connected to the water-cooled condenser for evacuating at least said water-cooled condenser. The method relates to a shut down and start-up of the power plant after the shutdown. The method includes: a) shut down of the steam turbine and gas turbine and/or a combustor of said gas turbine ; b) restoration of a good vacuum within the condenser by using said evacuating means; c) stopping said cooling water pump of said water-cooled condenser and said evacuating means, and filling up at least said condenser with steam up to slightly above atmospheric pressure; d) controlling the pressure with a flow of said cooling water; e) after a certain shut-down period starting the cooling water pump just before start-up of the plant; and f) starting the plant.