Exhaust gas flow regulator and heat recovery steam generator having same

Patent metadata

Field	Value
Publication number	US-2024052761-A1
Application number	US-202318354324-A
Country	US
Kind code	A1
Filing date	Jul 18, 2023
Priority date	Aug 12, 2022
Publication date	Feb 15, 2024
Grant date	—

Abstract

An exhaust gas flow regulator and a heat recovery steam generator including the same are provided. The exhaust gas flow regulator includes a plurality of first tubes spaced apart from each other in a vertical direction, a support plate disposed in a direction perpendicular to the extension direction of the first tubes and through which the plurality of first tubes penetrates, and a second tube disposed at one or both ends of the support plate so as to be coupled to the support plate and extending parallel to the first tubes, wherein the second tube is provided with a guide plate disposed to redirect exhaust gases flowing adjacent to the second tube toward the first tube.

First claim

What is claimed is:

1 . An exhaust gas flow regulator comprising:
a plurality of first tubes spaced apart from each other in a vertical direction; a support plate disposed perpendicular to an extension direction of the plurality of first tubes and through which the plurality of first tubes penetrates; and a second tube disposed at one or both ends of the support plate, configured to be coupled to the support plate, and extending parallel to the plurality of first tubes, wherein the second tube is provided with a guide plate configured to redirect exhaust gases flowing around the second tube toward the plurality of first tubes.

2 . The exhaust gas flow regulator according to claim 1 , wherein the second tube is disposed at both ends of the support plate, and the guide plate is disposed at either of the second tube disposed at both ends of the support plate.

3 . The exhaust gas flow regulator according to claim 2 , wherein the guide plate is rotatably connected to the second tube so that a flow direction of the exhaust gases flowing between the second tube and a first tube of the plurality of first tubes adjacent to the second tube is directed toward the first tube.

4 . The exhaust gas flow regulator according to claim 2 , wherein the exhaust gases flow from one side of the plurality of first tubes to the other side, and the guide plate is configured to redirect the exhaust gases flowing from one side of the plurality of first tubes toward the other side.

5 . The exhaust gas flow regulator according to claim 2 , further comprising a coupling plate having one end coupled to the second tube disposed on both sides of the support plate and the other end coupled to an end of the support plate, wherein the support plate and the coupling plate are coupled together by bolts.

6 . The exhaust gas flow regulator according to claim 5 , wherein both ends of the support plate are provided with bolt holes formed for engagement with the coupling plate, and one of the bolt holes is formed as a long hole extending in the vertical direction.

7 . The exhaust gas flow regulator according to claim 1 , wherein the second tube further comprises an edge plate rotatably coupled to the second tube.

8 . The exhaust gas flow regulator according to claim 7 , wherein the edge plate is connected to a side of the second tube that is opposite to a location where the support plate is coupled to the second tube.

9 . A heat recovery steam generator (HRSG) designed to facilitate the recovery of heat from high-temperature combustion exhaust gases discharged from a gas turbine, the HRSG comprising:
at least one stack; a heat transfer tube unit disposed on a lower side of the stack; an air duct including a plurality of flow paths having different cross-sectional areas and through which the exhaust gases flow from the gas turbine to the stack; and an exhaust gas flow regulator disposed in the air duct, the exhaust gas flow regulator comprising:
a plurality of first tubes spaced apart from each other in a vertical direction;
a support plate disposed perpendicular to an extension direction of the plurality of first tubes and through which the plurality of first tubes penetrates; and
a second tube disposed at one or both ends of the support plate, configured to be coupled to the support plate, and extending parallel to the plurality of first tubes, wherein the second tube is provided with a guide plate configured to redirect exhaust gases flowing around the second tube toward the plurality of first tubes.

10 . The HRSG according to claim 9 , wherein the air duct includes a first flow path into which exhaust gases from the gas turbine are introduced, a second flow path extending from the first flow path and having a cross-sectional area extending in a width direction of the air duct, and a third flow path extending diagonally from the second flow path in a height direction of the air duct.

11 . The HRSG according to claim 10 , wherein the exhaust gas flow regulator is positioned on both sides of the width direction on an inlet portion of the second flow path, and each of the first exhaust gas flow regulator is installed in the height direction.

12 . The HRSG according to claim 11 , wherein the guide plate is disposed on the second tube that is positioned at a predetermined distance from a surface forming the air duct.

13 . The HRSG according to claim 12 , wherein the guide plate is disposed such that a flow direction of the exhaust gases flowing from the first flow path to the second flow path is diverted toward the plurality of first tubes.

14 . The HRSG according to claim 12 , wherein the guide plate is disposed to allow the exhaust gases to flow away from the surface of the air duct forming the second flow path.

15 . The HRSG according to claim 10 , wherein the exhaust gas flow regulator is positioned on both sides of an inlet portion of the third flow path, in a direction where a flow path transitions from the second flow path to the third flow path.

16 . The HRSG according to claim 15 , wherein the guide plate is disposed to allow the exhaust gases to flow toward a center of the third flow path.

17 . The HRSG according to claim 12 , wherein the second tube further includes an edge plate rotatably coupled to the second tube, the edge plate being disposed between the surface forming the air duct and the second tube.

Assignees

• Doosan Enerbility Co Ltd

Inventors

• Nam Gyeong Mo

Classifications

• F01K25/10 Primary

  the vapours being cold, e.g. ammonia, carbon dioxide, ether · CPC title

• F22B37/40 Primary

  Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles · CPC title

• F22B37/101

  Tubes having fins or ribs · CPC title

• Y02E20/16

  Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] · CPC title

• F22B1/1815 Primary

  using the exhaust gases of gas-turbines · CPC title