Abstract: A method for cleaning a steam system including an intermittent operation processing step and a commissioning processing step are executed. The intermittent operation processing step includes: a no-load operation step in which a gas turbine is operated with no load, with a steam stop valve and a bypass valve closed; during the no-load operation step, a pressure accumulating step in which steam is accumulated in a pressure accumulation region; and, after the pressure accumulating step, an intermittent blowing step in which the bypass valve is opened, and steam in the pressure accumulation region is allowed to flow into a condenser. The commissioning processing step includes: a commissioning step in which the gas turbine is commissioned with the steam stop valve closed and the bypass valve open; and a continuous blowing step in which steam from a waste heat recovery boiler is allowed to flow into the condenser.

Abstract: A leakage gas emission system includes an enclosure surrounding at least part of a fuel supply system of a combustion device. The enclosure is provided with an outside emission unit for emitting internal gas to the outside. Fuel gas leaking from a leakage spot of the fuel supply system surrounded by the enclosure is taken in from an inlet port at one end of a first pipe and emitted from an emission port at another end toward the outside emission unit.

Abstract: A method for cleaning a steam system including an intermittent operation processing step and a commissioning processing step are executed. The intermittent operation processing step includes: a no-load operation step in which a gas turbine is operated with no load, with a steam stop valve and a bypass valve closed; during the no-load operation step, a pressure accumulating step in which steam is accumulated in a pressure accumulation region; and, after the pressure accumulating step, an intermittent blowing step in which the bypass valve is opened, and steam in the pressure accumulation region is allowed to flow into a condenser. The commissioning processing step includes: a commissioning step in which the gas turbine is commissioned with the steam stop valve closed and the bypass valve open; and a continuous blowing step in which steam from a waste heat recovery boiler is allowed to flow into the condenser.

Abstract: This collecting apparatus collects foreign matter mixed in condensate in/from a condenser of a steam turbine plant, and comprises a first foreign matter collector and an in-condenser collector. The first foreign matter collector is provided on an upstream side of a condensate pump in a pipe connecting a drain outlet provided to the bottom portion of the condenser and the condensate pump to each other, has an opening having a first dimension, and collects foreign matter while passing the condensate therethrough. The in-condenser collector is provided inside the condenser, has an opening having a second dimension larger than the first dimension, and collects foreign matter while passing the condensate in the condenser therethrough toward the drain outlet.

Abstract: A method for cleaning a steam system including an intermittent operation processing step and a commissioning processing step are executed. The intermittent operation processing step includes: a no-load operation step in which a gas turbine is operated with no load, with a steam stop valve and a bypass valve closed; during the no-load operation step, a pressure accumulating step in which steam is accumulated in a pressure accumulation region; and, after the pressure accumulating step, an intermittent blowing step in which the bypass valve is opened, and steam in the pressure accumulation region is allowed to flow into a condenser. The commissioning processing step includes: a commissioning step in which the gas turbine is commissioned with the steam stop valve closed and the bypass valve open; and a continuous blowing step in which steam from a waste heat recovery boiler is allowed to flow into the condenser.