Systems and Methods for Prewarming Heat Recovery Steam Generator Piping
AssigneeGeneral Electric Company
InventorsLeslie Yung-Min Tong, Diego Rancruel, SriHarsha V.
Life of this patent
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Abstract
The present application describes a heat recovery steam generator. The heat recovery steam generator may include a superheater, a first turbine section, a first main steam line in communication with the superheater and the first turbine section, and a first prewarming line positioned downstream of the first main steam line such that a flow of steam from the superheater preheats the first main steam line without entry into the first turbine section.
Claims20
A heat recovery steam generator, comprising:
- a superheater;
- a first turbine section;
- a first main steam line in communication with the superheater and the first turbine section;
- and
- a first prewarming line positioned downstream of the first main steam line such that a flow of steam from the superheater preheats the first main steam line without entry into the first turbine section.
A method of starting up a heat recovery steam generator, comprising:
- generating a flow of steam in a superheater;
- directing the flow of steam through a first main steam line;
- diverting the flow of steam through a first prewarming line until the flow of steam reaches a predetermined temperature;
- and
- directing the flow of steam to a first turbine section once the predetermined temperature is reached.
A heat recovery steam generator, comprising:
- a superheater;
- a first turbine section;
- a first main steam line in communication with the superheater and the first turbine section;
- a first prewarming line positioned downstream of the first main steam line such that a flow of steam from the superheater preheats the first main steam line without entry into the first turbine section;
- a second turbine section;
- a reheater downstream of the first turbine section;
- a second main steam line in communication with the reheater and the second turbine section;
- and
- a second prewarming line positioned downstream of the second main steam line such that the flow of steam from the reheater preheats the second main steam line without entry into the second turbine section.
Dependencies are inferred from the claim text.