Steam turbine plant and control method of the same

• Main Authors: Itou, Shinsuke, Iwasa, Kiyohiko, Sanada, Masahiko, Suzuki, Kensuke, Egami, Norihide
• Format: Patent
• Language: English; French; German
• Published: 28.08.2019
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; STEAM ACCUMULATORS; STEAM BOILERS; STEAM ENGINE PLANTS; STEAM ENGINES; STEAM GENERATION; WEAPONS

A steam turbine plant includes a first turbine (3) driven by steam from a boiler (1), a second turbine (4) driven by steam from a reheater (2), a third turbine (5) driven by the steam exhausted from the second turbine (4), and a carbon dioxide capturing system (22) including a reboiler to heat an absorbing liquid with the steam exhausted or extracted from the second turbine. The plant further includes a steam pipe (11) to feed the steam exhausted from the second turbine to the third turbine, and a first steam extraction pipe to send the steam exhausted or extracted from the second turbine to the reboiler. The plant further includes a pressure detector (13) to detect a pressure of the steam flowing through the steam pipe or the first steam extraction pipe, a pressure adjustment valve (14) provided on the steam pipe, and a controller (15) to control the valve based on the detected pressure.