Method for operating a steam turbine plant

Patent metadata

Field	Value
Publication number	US-9982569-B2
Application number	US-201415023029-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Sep 24, 2013
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A method for operating a steam turbine plant including a steam turbine and a steam generator allows a power reserve to be provided whilst simultaneously maintaining a high level of efficiency in the normal mode of operation. The steam turbine plant includes a heat reservoir which is associated with the steam turbine, from which the steam is removed and is fed to the steam turbine. The steam is fed to the steam turbine when the steam generator is not in operation.

First claim

The invention claimed is:

1. A method for operating a steam turbine plant with a steam turbine and a steam generator, the steam turbine plant comprising a heat store associated with the steam turbine, the method comprising:
removing steam from the heat store and feeding to the steam turbine,
wherein the steam is fed to the steam turbine whilst the steam generator is idle, and
loading the heat store with saturated water from a steam drum of the steam generator whilst a power demand on the steam turbine plant from a power grid is below a preset threshold value.

2. The method as claimed in claim 1 ,
wherein the heat store is loaded with superheated steam from the steam generator or the steam turbine.

3. The method as claimed in claim 2 ,
wherein the heat store is loaded via a heat exchanger.

4. The method as claimed in claim 1 ,
wherein the steam turbine plant comprises a high-pressure part, a medium-pressure part, and a low-pressure part, and
wherein the heat store is loaded from the high-pressure part of the steam generator, and the steam is fed to the medium-pressure part of the steam turbine.

5. The method as claimed in claim 1 ,
wherein the steam turbine plant comprises a high-pressure part, a medium-pressure part, and a low-pressure part, and
wherein the heat store is loaded from the medium-pressure part of the steam generator, and the steam is fed to the low-pressure part of the steam turbine.

6. A steam turbine plant comprising:
a steam turbine,
a steam generator,
a heat store associated with the steam turbine from which steam is removed and fed to the steam turbine, wherein the heat store is adapted such that the steam is fed to the steam turbine whilst the steam generator is idle, and the heat store is loaded with saturated water from a steam drum of the steam generator whilst a power demand on the steam turbine plant from a power grid is below a preset threshold value.

7. The steam turbine plant as claimed in claim 6 ,
wherein the heat store is designed as a Ruths steam accumulator.

8. A gas-and-steam turbine plant comprising:
a steam turbine plant as claimed in claim 6 .

9. The method as claimed in claim 1 , further comprising feeding the steam from the heat store to the steam generator whilst the steam generator is idle.

Assignees

• Siemens Ag

Inventors

• Lenk Uwe
• Tremel Alexander

Classifications

• F01K23/101

  Regulating means specially adapted therefor (F01K23/105, F01K23/108 take precedence) · CPC title

• F01K13/02 Primary

  Controlling, e.g. stopping or starting · CPC title

• F01K7/22

  the turbines having inter-stage steam heating · CPC title

• F01K3/008

  Use of steam accumulators of the Ruth type for storing steam in water; Regulating thereof (Ruth accumulators per se F01K1/04) · CPC title

• F01K3/004

  Accumulation in the liquid branch of the circuit · CPC title