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US 9,739,478 B2Granted
System and method for heat recovery steam generators
AssigneeGeneral Electric Company
InventorsDiego Fernando Rancruel, Drake Joseph Viscome, Elizabeth Angelyn Fadde, Ashlee Nicole Atwell, Kyle Joseph Conger
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Abstract
A system includes a heat recovery steam generator (HRSG) having a plurality of evaporator sections. At least one evaporator section includes a forced circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, and a first superheater configured to receive the saturated steam and the first superheated steam.
Claims32
A system, comprising:
- a heat recovery steam generator (HRSG), comprising:
- a plurality of different pressure evaporator sections, wherein at least one of the plurality of different pressure evaporator sections is a low-, intermediate-, or high-pressure evaporator section that comprises:
- a first evaporator configured to generate a saturated steam;
- a second evaporator configured to generate a first superheated steam;
- a first superheater configured to receive the saturated steam from the first evaporator and generate a second superheated steam;
- a second superheater configured to receive the first superheated steam from the second evaporator and generate a third superheated steam;
- and a downstream system configured to receive the second superheated steam from the first superheater and the third superheated steam from the second superheater, wherein the downstream system comprises an attemperator configured to receive the second superheated steam from the first superheater and the third superheated steam from the second superheater.
4 more elements
A method of operation of a heat recovery steam generator (HRSG), comprising:
- generating a saturated steam using a first evaporator disposed in an evaporator section of the heat recovery steam generator (HRSG)
- generating a first superheated steam using a second evaporator disposed in the evaporator section of the HRSG;
- generating, via a first superheater, a second superheated steam by superheating the saturated steam from the first evaporator;
- generating, via a second superheater, a third superheated steam by superheating the first superheated steam from the second evaporator;
- and routing the second superheated steam from the first superheater and the third superheated steam from the second superheater to a downstream system, wherein routing comprises attemperating the third superheated steam with the second superheated steam in an attemperator of the downstream system to generate a fourth superheated steam.
2 more elements
A system, comprising:
- a heat recovery steam generator (HRSG) comprising:
- a plurality of evaporator sections, wherein at least one of the plurality of evaporator sections comprises:
- a first flow path having a forced circulation evaporator configured to generate a saturated steam and a first superheater configured to receive the saturated steam from the forced circulation evaporator and generate a second superheated steam;
- a second flow path having a once-through evaporator configured to generate a first superheated steam and a second superheater configured to receive the first superheated steam from the once-through evaporator and generate a third superheated steam, wherein the first and second flow paths are in a parallel configuration;
- an attemperator configured to receive flows from the first and second flow paths, wherein the attemperator is configured to attemperate the third superheated steam with the second superheated steam to generate a fourth superheated steam.
2 more elements
A system, comprising:
- a plurality of evaporator sections, wherein at least one evaporator section of the plurality of evaporator sections comprises:
- a first evaporator configured to generate a saturated steam;
- a second evaporator configured to generate a first superheated steam;
- a first superheater configured to receive the saturated steam from the first evaporator and generate a second superheated steam;
- a second superheater configured to receive the first superheated steam from the second evaporator and generate a third superheated steam;
- and
- an attemperator configured to receive the second superheated steam from the first superheater and the third superheated steam from the second superheater.
4 more elements
Dependencies are inferred from the claim text.