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US 11,236,640 B2Granted
Steam power plant, modification method and operation method of steam power plant
AssigneeMitsubishi Power, Ltd.
InventorShingo Tamura
Life of this patent
Estimating the term…
Abstract
A steam power plant includes a first steam power plant, a second steam power plant, and an inter-unit. The first steam power plant includes a boiler, a high-pressure turbine, a first reheat line, a first feed water heater, and a high-pressure extraction steam line. The second steam power plant includes a boiler, a high-pressure turbine, a first reheat line, a first feed water heater, and a high-pressure extraction steam line. The inter-unit connected extraction steam line connects the high-pressure extraction steam line of the first steam power plant with the high-pressure extraction steam line of the second steam power plant.
Claims8
A steam power plant comprising:
- a first steam power plant having a boiler which generates steam, a high-pressure turbine which is driven with the steam that the boiler generates, a first reheat line which supplies the steam which is exhausted or extracted from the high-pressure turbine to the boiler, a first feed water heater to which part of the steam which is exhausted or extracted from the high-pressure turbine is supplied, and a high-pressure extraction steam line which supplies the part of the steam which is exhausted or extracted from the high-pressure turbine to the first feed water heater;
- a second steam power plant having a boiler which generates steam, a high-pressure turbine which is driven with the steam that the boiler generates, a first reheat line which supplies the steam which is exhausted or extracted from the high-pressure turbine to the boiler, a first feed water heater to which part of the steam which is exhausted or extracted from the high-pressure turbine is supplied, and a high-pressure extraction steam line which supplies the part of the steam which is exhausted or extracted from the high-pressure turbine to the first feed water heater;
- and
- an inter-unit connected extraction steam line which connects the high-pressure extraction steam line of the first steam power plant with the high-pressure extraction steam line of the second steam power plant.
1 more element
A modification method of a steam power plant which has
- a first steam power plant having a boiler which generates steam, a high-pressure turbine which is driven with the steam that the boiler generates, a first reheat line which supplies the steam which is exhausted or extracted from the high-pressure turbine to the boiler, a first feed water heater to which part of the steam which is exhausted or extracted from the high-pressure turbine is suppled, and a high-pressure extraction steam line which supplies the part of the steam which is exhausted or extracted from the high-pressure turbine to the first feed water heater, and
- a second steam power plant having a boiler which generates steam, a high-pressure turbine which is driven with the steam that the boiler generates, a first reheat line which supplies the steam which is exhausted or extracted from the high-pressure turbine to the boiler, a first feed water heater to which part of the steam which is exhausted or extracted from the high-pressure turbine is supplied, and a high-pressure extraction steam line which supplies the part of the steam which is exhausted or extracted from the high-pressure turbine to the first feed water heater, the modification method comprising the step of:
- installing an inter-unit connected extraction steam line which connects the high-pressure extraction steam line of the first steam power plant with the high-pressure extraction steam line of the second steam power plant.
An operation method of a steam power plant which has
- a first steam power plant having a boiler which generates steam, a high-pressure turbine which is driven with the steam that the boiler generates, a first reheat line which supplies the steam which is exhausted or extracted from the high-pressure turbine to the boiler, a first feed water heater to which part of the steam which is exhausted or extracted from the high-pressure turbine is supplied, and a high-pressure extraction steam line which supplies the part of the steam which is exhausted or extracted from the high-pressure turbine to the first feed water heater, and
- a second steam power plant having a boiler which generates steam, a high-pressure turbine which is driven with the steam that the boiler generates, a first reheat line which supplies the steam which is exhausted or extracted from the high-pressure turbine to the boiler, a first feed water heater to which part of the steam which is exhausted or extracted from the high-pressure turbine is suppled, and a high-pressure extraction steam line which supplies the part of the steam which is exhausted or extracted from the high-pressure turbine to the first feed water heater, the operation method comprising the step of:
- supplying part of the steam from the high-pressure extraction steam line of the first steam power plant to the high-pressure extraction steam line of the second steam power plant in a case of operating the first steam power plant under a high load and operating the second steam power plant under a low load.
Dependencies are inferred from the claim text.