Method for Operating a Waste Heat Steam Generator
AssigneeSiemens Aktiengesellschaft
InventorsJan Brückner, Frank Thomas
Life of this patent
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Abstract
A method for operating a waste heat steam generator including an evaporator, an economizer having a number of economizer heating surfaces, and a bypass line connected on the flow medium side in parallel with a number of economizer heating surfaces is provided. The method makes possible higher operational safety and reliability in the control of the waste heat steam generator. For this purpose, a parameter that is characteristic of the thermal energy fed to the waste heat steam generator is used to control or regulate the flow rate of the by-pass line.
Claims21
1-9. (canceled)
A method for operating a waste heat steam generator, comprising:
- providing an evaporator, an economizer with a first plurality of economizer heating surfaces, and a bypass line connected in parallel with a second plurality of economizer heating surfaces on a flow medium side;
- and
- using a variable that is characteristic of a thermal energy supplied to the waste heat steam generator to control or regulate a flow rate through the bypass line.
A waste heat steam generator having an evaporator, comprising:
- an economizer with a first plurality of economizer heating surfaces;
- a bypass line connected in parallel with a second plurality of economizer heating surfaces on a flow medium side;
- a flow control or flow regulator valve;
- a temperature and pressure measuring device at an evaporator inlet;
- a temperature measuring device at a mixing point at an outlet of the bypass line;
- and
- a control device that is connected to the temperature measuring device,
- wherein the flow control or flow regulator valve on a data side and is embodied for performing a method, the method comprising:
- using a variable that is characteristic of a thermal energy supplied to the waste heat steam generator to control or regulate a flow rate through the bypass line.
A gas and steam turbine system, comprising:
- a waste heat steam generator, comprising:
- an economizer with a first plurality of economizer heating surfaces;
- a bypass line connected in parallel with a second plurality of economizer heating surfaces on z flow medium side;
- a flow control or flow regulator valve;
- a temperature and pressure measuring device at an evaporator inlet;
- a temperature measuring device at a mixing point at an outlet of the bypass line;
- and
- a control device that is connected to the temperature measuring device,
- wherein the flow control or flow regulator valve on a data side and is embodied for performing a method, the method comprising:
- using a variable that is characteristic of a thermal energy supplied to the waste heat steam generator to control or regulate a flow rate through the bypass line.
Dependencies are inferred from the claim text.