Once-through evaporator systems
AssigneeGeneral Electric Technology GmbH
InventorsChristoph Bernhard RUCHTI, Petrus Johannes KOLLER, Chuan WANG, Jeffrey Fredrick MAGEE, Hans Ulrich LENHERR, Alexander TAYLOR
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Abstract
The present application provides a once-through evaporator system. The once-through evaporator system may include a number of enlarged once-through evaporator sections, a first superheater positioned immediately downstream of the enlarged once-through evaporator sections, a second superheater positioned downstream of the first superheater, and an attemperator positioned between the first superheater and the second superheater.
Claims20
A once-through evaporator system, comprising:
- a plurality of enlarged once-through evaporator sections;
- a first superheater positioned immediately downstream of the plurality of enlarged once-through evaporator sections;
- a second superheater positioned downstream of the first superheater;
- and
- an attemperator positioned between the first superheater and the second superheater.
A method of monitoring superheat temperatures in a once-through evaporator system, comprising:
- monitoring a steam temperature downstream of a superheater;
- initiating an immediate feedwater spray from an attemperator if the steam temperature exceeds a predetermined temperature;
- and
- opening a main control valve to supply a flow of feedwater to the attemperator.
A system, comprising:
- a once-through evaporator configured to receive a liquid and selectively output only a steam or a superheated steam;
- and
- at least one superheater fluidly coupled to the once-through evaporator, wherein the at least one superheater is configured to receive the steam or the superheated steam from the once-through evaporator and output a superheated steam, wherein the steam flows directly from the once-through evaporator to the at least one superheater.
Dependencies are inferred from the claim text.