Heat pipe unit and waste heat recovery boiler including same

Patent metadata

Field	Value
Publication number	US-12422193-B2
Application number	US-202318364615-A
Country	US
Kind code	B2
Filing date	Aug 3, 2023
Priority date	Nov 29, 2022
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

Proposed is a heat pipe unit and a waste heat recovery boiler including the same, wherein a heat pipe unit includes a plurality of heat pipes provided inside a casing part of a waste heat recovery boiler and a plurality of connection pipes connecting the plurality of heat pipes to each other. The heat pipes are disposed in a plurality of rows along a direction in which the exhaust gas flows. The connection pipes include a plurality of first connection pipes disposed in oblique directions and connecting the plurality of heat pipes disposed in corresponding front and rear side rows, and a plurality of second connection pipes connecting the plurality of heat pipes disposed in corresponding front and rear side rows and disposed not to be parallel with the plurality of first connection pipes.

First claim

The invention claimed is:

1. A heat pipe unit comprising:
a plurality of heat pipes provided inside a casing part of a waste heat recovery boiler; and
a plurality of connection pipes connecting the plurality of heat pipes to each other,
wherein the plurality heat pipes has a fluid which moves thereinside and exchanges heat with exhaust gas flowing out to an outside the casing part, the plurality of heat pipes being disposed in a plurality of rows along a direction in which the exhaust gas flows,
wherein the plurality of connection pipes comprises:
a plurality of first connection pipes disposed in oblique directions and connecting the plurality of heat pipes disposed in a first front side row with the plurality of heat pipes disposed in a first rear side row; and
a plurality of second connection pipes connecting the plurality of heat pipes disposed in a second front side row with the plurality of heat pipes disposed in a second rear side row, and disposed not to be parallel with the plurality of first connection pipes,
wherein the first front and rear side rows and the second front and rear side rows are referred to on the basis of the direction in which the exhaust gas flows,
wherein the plurality of first connection pipes comprises:
a plurality of 1-1 connection pipes connecting a first portion of the plurality of heat pipes in the first front side row and a first portion of the plurality of heat pipes in the first rear side row, which are spaced apart; and
a plurality of 1-2 connection pipes connecting a second portion of the plurality of heat pipes in the first front side row and a second portion of the plurality of heat pipes in the first rear side row,
wherein the second portion of the plurality of heat pipes in the first front side row is disposed adjacent to the first portion of the plurality of heat pipes in the first front side row, and the second portion of the plurality of heat pipes in the first rear side row is disposed adjacent to the first portion of the plurality of heat pipes in the first rear side row,
wherein the plurality of 1-1 connection pipes and the plurality of 1-2 connection pipes are disposed to intersect each other,

wherein the plurality of second connection pipes comprises:
a plurality of 2-1 connection pipes connecting a first portion of the plurality of heat pipes disposed in the second front side row and a first portion of the plurality of heat pipes disposed in the second rear side row, the plurality of 2-1 connection pipes intersecting with the plurality of 1-1 connection pipes; and
a plurality of 2-2 connection pipes connecting a second portion of the plurality of heat pipes in the second front side row and a second portion of the plurality of heat pipes in the second rear side row,
wherein the second portion of the plurality of heat pipes in the second front side row is disposed adjacent to the first portion of the plurality of heat pipes in the second front side row, and the second portion of the plurality of heat pipes in the second rear side row is disposed adjacent to the first portion of the plurality of heat pipes in the second rear side row,
wherein the plurality of 2-1 connection pipes and the plurality of 2-2 connection pipes are disposed to intersect each other,

wherein at least one of the 2-1 connection pipes and the plurality of 1-1 connecting pipes are disposed to intersect with each other, and at least one of the 2-2 connection pipes and the plurality of 1-2 connecting pipes are disposed to intersect with each other,
wherein the second front side row and the second rear side row are disposed in a space between the first front side row and the first rear side row.

2. A waste heat recovery boiler, the boiler comprising:
a casing part providing a flow path through which exhaust gas flows; and a heat pipe unit,
wherein the heat pipe unit comprises:
a plurality of heat pipes provided inside a casing part of a waste heat recovery boiler, and
a plurality of connection pipes connecting the plurality of heat pipes to each other,
wherein the plurality of heat pipes has a fluid which moves thereinside and exchanges heat with exhaust gas flowing out to an outside the casing part, the plurality of heat pipes being disposed in a plurality of rows along a direction in which the exhaust gas flows,
wherein the plurality of connection pipes comprises:
a plurality of first connection pipes disposed in oblique directions and connecting the plurality of heat pipes disposed in a first front side row with the plurality of heat pipes disposed in a first rear side row; and
a plurality of second connection pipes connecting the plurality of heat pipes disposed in a second front side row with the plurality of heat pipes disposed in a second rear side row, and disposed not to be parallel with the plurality of first connection pipes,
wherein the first front and rear side rows and the second front and rear side are referred to on the basis of the direction in which the exhaust gas flows,
wherein the plurality of first connection pipes comprises:
a plurality of 1-1 connection pipes connecting a first portion of the plurality of heat pipes in the first front side row and a first portion of the plurality of heat pipes in the first rear side row, which are spaced apart; and
a plurality of 1-2 connection pipes connecting a second portion of the plurality of heat pipes in the first front side row and a second portion of the plurality of heat pipes in the first rear side row,
wherein the second portion of the plurality of heat pipes in the first front side row is disposed adjacent to the first portion of the plurality of heat pipes in the first front side row, and the second portion of the plurality of heat pipes in the first rear side row is disposed adjacent to the first portion of the plurality of heat pipes in the first rear side row,
wherein the plurality of 1-1 connection pipes and the plurality of 1-2 connection pipes are disposed to intersect each other,

wherein the plurality of second connection pipes comprises:
a plurality of 2-1 connection pipes connecting a first portion of the plurality of heat pipes disposed in the second front side row and a first portion of the plurality of heat pipes disposed in the second rear side row, the plurality of 2-1 connection pipes intersecting with the plurality of 1-1 connection pipes; and
a plurality of 2-2 connection pipes connecting a second portion of the plurality of heat pipes in the second front side row and a second portion of the plurality of heat pipes in the second rear side row,
wherein the second portion of the plurality of heat pipes in the second front side row is disposed adjacent to the first portion of the plurality of heat pipes in the second front side row, and the second portion of the plurality of heat pipes in the second rear side row is disposed adjacent to the first portion of the plurality of heat pipes in the second rear side row,
wherein the plurality of 2-1 connection pipes and the plurality of 2-2 connection pipes are disposed to intersect each other,

wherein at least one of the 2-1 connection pipes and the plurality of 1-1 connecting pipes are disposed to intersect with each other, and at least one of the 2-2 connection pipes and the plurality of 1-2 connecting pipes are disposed to intersect with each other,
wherein the second front side row and the second rear side row are disposed in a space between the first front side row and the first rear side row.

Assignees

• Doosan Enerbility Co Ltd

Inventors

• Kim Kyu Man
• Seon Chilyeong
• Hong Jong Ho
• Kim Jin Ii

Classifications

• F28F2210/10

  Particular layout, e.g. for uniform temperature distribution · CPC title

• F28D1/04

  with tubular conduits {(F28D1/0246 takes precedence)} · CPC title

• F22B7/08

  inside the furnace tube in longitudinal arrangement · CPC title

• F22B7/06

  inside the furnace tube in transverse arrangements · CPC title

• F28F9/02

  Header boxes; End plates · CPC title