JP2018141381A5

JP2018141381A5 -

Info

Publication number: JP2018141381A5
Application number: JP2017034936A
Authority: JP
Filing date: 2017-02-27
Publication date: 2019-11-07
Anticipated expiration: 2037-02-27

Claims

A gas turbine driven by combustion gas;
A first generator that generates power by being driven by the gas turbine; and an exhaust gas economizer that generates steam by recovering heat from the exhaust gas discharged from the gas turbine;
A boiler having a furnace and a steam drum;
A circulation channel connected to use the steam drum as a brackish water separator of the exhaust gas economizer;
A steam turbine driven by steam from the steam drum;
A second generator driven by the steam turbine to generate electricity;
Marine power generation system with

A control unit for controlling a burner provided in the furnace,
2. The marine power generation system according to claim 1, wherein the control unit has a boiler operation mode in which the burner is ignited according to a load of the gas turbine as an operation mode of the boiler.

A control unit for controlling a burner provided in the furnace,
The marine power generation system according to claim 1, wherein the control unit has a boiler operation mode in which the gas turbine ignites the burner during rated operation as an operation mode of the boiler.

As an operation mode, the gas turbine is stopped, a burner provided in the furnace is ignited, and steam is introduced from the steam drum into the steam turbine, thereby generating power only by the second generator. Mode, driving the gas turbine without igniting the burner, and introducing the steam generated by the exhaust gas economizer from the steam drum to the steam turbine. A control unit having a second operation mode for generating power with a generator;
The marine power generation system according to claim 1, wherein the control unit selects the operation mode according to a required power of the marine vessel.

The said control part selects the said 1st operation mode at the time of the 1st load with little required electric power of the said ship, and selects the said 2nd operation mode at the time of the 2nd load when the load increased rather than the time of the said 1st load. Item 5. A marine power generation system according to Item 4.

The control unit ignites the burner provided in the furnace as the operation mode, and introduces steam from the steam drum to the steam turbine, whereby the first generator and the second generator The marine power generation system according to claim 4, further comprising a third operation mode for generating electric power.

The control unit ignites the burner provided in the furnace as the operation mode, and introduces steam from the steam drum to the steam turbine, whereby the first generator and the second generator The marine power generation system according to claim 5, further comprising a third operation mode for generating electric power.

8. The marine power generation system according to claim 7, wherein the control unit selects the third operation mode at the time of a third load in which the load is increased from that at the time of the second load.

The marine power generation system according to any one of claims 4 to 8, further comprising a boiler exhaust gas pipe that guides exhaust gas from the boiler to the exhaust gas economizer.

An exhaust gas economizer for boiler that heats steam by recovering heat from the exhaust gas discharged from the boiler,
The marine power generation system according to any one of claims 4 to 8, further comprising a boiler exhaust gas pipe that guides the exhaust gas discharged from the boiler to the boiler exhaust gas economizer.

A boiler overheat pipe that connects the steam drum and the steam turbine and guides the steam discharged from the steam drum to the steam turbine;
A boiler superheater provided in the boiler superheat pipe,
The marine power generation system according to any one of claims 1 to 10, wherein the boiler superheater is disposed in the furnace.

A gas turbine driving process in which the gas turbine is driven by the combustion gas;
A first power generation step of generating power by driving a first generator by the gas turbine;
A heat recovery step of recovering heat from the exhaust gas discharged from the gas turbine;
A brackish water separation step of brazing off the steam obtained in the heat recovery step with the steam drum of a boiler having a furnace and a steam drum;
A steam turbine driving step of driving the steam turbine with the steam obtained in the brackish water separation step;
A power generation method for a marine power generation system comprising: a second power generation step of generating electric power by driving a second generator by the steam turbine.