Spray nozzle for attemperators and attemperator including the same

Patent metadata

Field	Value
Publication number	US-10456796-B2
Application number	US-201715461342-A
Country	US
Kind code	B2
Filing date	Mar 16, 2017
Priority date	Jun 21, 2016
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

Disclosed herein are a spray nozzle for an attemperator and an attemperator including the spray nozzle. An attemperator according to an embodiment includes: a steam transfer pipe through which steam is transferred; a fixed pipe which is fixed to an outer surface of the steam transfer pipe; and a spray nozzle, which is coupled to the fixed pipe, disposed in the steam transfer pipe and configured to spray cooling water into the steam transfer pipe. The spray nozzle includes, on an outer circumferential surface thereof, at least one support that protrudes toward the fixed pipe. The spray nozzle is spaced apart from the fixed pipe.

First claim

What is claimed is:

1. A spray nozzle operable to spray cooling water into a steam transfer pipe and installed in an attemperator including the steam transfer pipe, the spray nozzle comprising:
a fixed pipe coupled at a first end to an outer surface of the steam transfer pipe and open at a second end; and
a first support protruding from an outer circumferential surface of the spray nozzle toward an inner circumferential surface of the fixed pipe, to space the spray nozzle and the fixed pipe apart from each other, wherein
the spray nozzle is disposed in the fixed pipe so as to be coupled to the second end of the fixed pipe and projected through the first end in order to spray the cooling water into the steam transfer pipe by way of the fixed pipe, and
the first support has an annular shape including first and second surfaces each of which is parallel to the other and communicates with the outer circumferential surface of the spray nozzle, the first surface being disposed outward radially with respect to a center axis of the steam transfer pipe and residing radially inside the outer surface of the steam transfer pipe, the second surface being disposed inward radially with respect to the first surface and residing radially inside an inner surface of the steam transfer pipe.

2. The spray nozzle according to claim 1 , wherein an end of the first support and an inner surface of the fixed pipe are spaced apart from each other.

3. The spray nozzle according to claim 1 , further comprising:
a protrusion that protrudes from an outer circumferential surface of the first support.

4. The spray nozzle according to claim 3 , wherein the protrusion of the first support includes a plurality of protrusions arranged on the outer circumferential surface of the first support at positions spaced apart from each other.

5. The spray nozzle according to claim 1 , wherein the first support is formed as a plurality of supports arranged along the outer circumferential surface of the spray nozzle at positions spaced apart from each other.

6. The spray nozzle according to claim 1 , wherein a junction between the first support and the spray nozzle has a round shape.

7. The spray nozzle according to claim 1 , further comprising:
a damper coupled to the first support and operable to slide with respect to the first support in a radial direction of the spray nozzle, and
an elastic unit disposed between the first support and the damper.

8. The spray nozzle according to claim 1 , further comprising:
a nozzle fixing member coupled to the steam transfer pipe at a position spaced apart from the fixed pipe and operable to support a free end of the spray nozzle; and
a second support that protrudes from the nozzle fixing member toward the spray nozzle and is disposed radially outside the outer surface of the steam transfer pipe.

9. An attemperator comprising:
a steam transfer pipe operable to transfer steam;
a fixed pipe coupled at a first end to an outer surface of the steam transfer pipe and open at a second end;
a spray nozzle disposed in the fixed pipe so as to be coupled to the second end of the fixed pipe and projected through the first end and operable to spray cooling water into the steam transfer pipe by way of the fixed pipe;
a first support protruding from an outer circumferential surface of the spray nozzle toward an inner circumferential surface of the fixed pipe, to space the spray nozzle and the fixed pipe apart from each other; and
a nozzle fixing member disposed at a position spaced apart from the fixed pipe and operable to support a free end of the spray nozzle,
wherein the first support has an annular shape including first and second surfaces each of which is parallel to the other and communicates with the outer circumferential surface of the spray nozzle, the first surface being disposed outward radially with respect to a center axis of the steam transfer pipe and residing radially inside the outer surface of the steam transfer pipe, the second surface being disposed inward radially with respect to the first surface and residing radially inside an inner surface of the steam transfer pipe.

10. The attemperator according to claim 9 , wherein the nozzle fixing member is aligned with the fixed pipe, and the free end of the spray nozzle is disposed in the nozzle fixing member.

11. The attemperator according to claim 9 , wherein
the outer circumferential surface of the spray nozzle includes a seat having a flat lower surface that protrudes outward from the spray nozzle and faces the steam transfer pipe, and
an inner surface of the fixed pipe includes a stop protrusion having a flat upper surface for receiving the seat of the spray nozzle.

12. The attemperator according to claim 9 , wherein the nozzle fixing member is disposed in and coupled to the steam transfer pipe.

13. The attemperator according to claim 12 , wherein the nozzle fixing member threadedly couples with the spray nozzle.

14. The attemperator according to claim 9 , wherein the nozzle fixing member includes a second support that protrudes toward the spray nozzle.

15. An attemperator comprising:
a steam transfer pipe operable to transfer steam;
a fixed pipe coupled at a first end to an outer surface of the steam transfer pipe and open at a second end;
a spray nozzle disposed in the fixed pipe so as to be coupled to the second end of the fixed pipe and projected through the first end and operable to spray cooling water into the steam transfer pipe by way of the fixed pipe;
a first support protruding from an outer circumferential surface of the spray nozzle toward an inner circumferential surface of the fixed pip; to space the spray nozzle and the fixed pipe apart from each other; and
a nozzle fixing member coupled to the steam transfer pipe and operable to support a free end of the spray nozzle,
wherein the first support has an annular shape including first and second surfaces each of which is parallel to the other and communicates with the outer circumferential surface of the spray nozzle, the first surface being disposed outward radially with respect to a center axis of the steam transfer pipe and residing radially inside the outer surface of the steam transfer pipe, the second surface being disposed inward radially with respect to the first surface and residing radially inside an inner surface of the steam transfer pipe.

16. The attemperator according to claim 15 , wherein the nozzle fixing member is aligned with the fixed pipe, and the free end of the spray nozzle is disposed in the nozzle fixing member.

17. The attemperator according to claim 15 , wherein the nozzle fixing member includes a second support that protrudes toward the spray nozzle.

Assignees

• Doosan Heavy Ind & Construction Co Ltd
• Doosan Heavy Ind Constr Co Ltd

Inventors

• Kim Dong Wook
• Kim Kyu Man
• Song Woo Seong
• Kim Jae Cheol
• Kim Cheol Hong
• Yun Tae Jun
• Jeong Seong Yong

Classifications

• B05B15/65

  Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits · CPC title

• B05B1/205

  characterised by the longitudinal shape of the elongated body · CPC title

• F22G5/123

  Water injection apparatus · CPC title

• B05B7/0075 Primary

  Nozzle arrangements in gas streams · CPC title

• B05B15/14

  Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts · CPC title