Modular heat recovery steam generator construction

Patent metadata

Field	Value
Publication number	US-10330310-B2
Application number	US-201515304908-A
Country	US
Kind code	B2
Filing date	May 22, 2015
Priority date	Jun 10, 2014
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A method for installing a heat recovery steam generator ( 1 ) with a plurality of pre-assembled modules ( 10 ) includes arranging a pre-assembled module ( 10 ) at an installation site. The pre-assembled module ( 10 ) includes a functional unit of the heat recovery steam generator ( 1 ) housed in a casing structure ( 12 ). The casing structure ( 12 ) includes a top casing ( 12 a ), a bottom casing ( 12 b ) and a side casing ( 12 c ). An open side ( 15 ) is defined opposite to the side casing ( 12 c ). The module ( 10 ) is arranged horizontally at the installation site with the open side ( 15 ) facing downward and the side casing ( 12 c ) facing upward. The method includes attaching a structural steel ( 13 ) to the side casing ( 12 c ) in a horizontal position without lifting the module ( 10 ). The module ( 10 ) with the attached structural steel ( 13 ) is lifted to a vertical position and secured to a foundation ( 60 ). Also described is a method for pre-assembling the module ( 10 ) and a method for transporting the pre-assembled module ( 10 ) to the installation site.

First claim

What is claimed is:

1. A method for installing a heat recovery steam generator comprising a plurality of pre-assembled modules at an installation site, the method comprising:
arranging a pre-assembled module of the heat recovery steam generator at an installation site, wherein the pre-assembled module comprises a functional unit of the heat recovery steam generator housed in a casing structure, the casing structure comprising a top casing, a bottom casing and a side casing, whereby an open side is defined opposite to the side casing,
wherein the pre-assembled module is arranged in a horizontal position on the installation site with the open side facing downward and the side casing facing upward,

attaching an exterior structural steel component to the side casing in a horizontal position without lifting the module,
lifting the module with the attached exterior structural steel component to a vertical position, and
securing the exterior structural steel component to a foundation with the module in the vertical position.

2. The method according to claim 1 , further comprising transporting the pre-assembled module to the installation site with the open side facing downward and the side casing facing upward.

3. The method according to claim 1 , wherein said lifting is carried out by way of slotted holes provided on the exterior structural steel component.

4. The method according to claim 1 , wherein said attaching comprises bolting the exterior structural steel component to the side casing in the horizontal position.

5. The method according to claim 1 , wherein the functional unit of the pre-assembled module comprises a plurality of heat exchange tubes configured for conducting a fluid medium.

6. The method according to claim 5 , wherein in the installed position, the heat exchanger tubes are oriented vertically.

7. The method according to claim 5 , wherein the heat exchange tubes comprise finned tubes.

8. The method according to claim 1 , wherein the functional unit is selected from the group consisting of: economizer, evaporator, superheater and reheater.

9. The method according to claim 1 , wherein the pre-assembled module further comprises a feeder header.

10. The method according to claim 1 , wherein the pre-assembled module further comprises a steam drum attached externally to the top casing.

11. The method according to claim 1 , wherein the pre-assembled module further comprises a layer of insulation along an inner surface of the casing structure.

Assignees

• Siemens Ag
• Siemens Heat Transfer Tech B V

Inventors

• Torkildson Steve V
• Van Der Weiden Marinus J

Classifications

• F22B37/001 Primary

  Steam generators built-up from pre-fabricated elements · CPC title

• F22B37/244 Primary

  for water-tube steam generators suspended from the top · CPC title

• F22B37/66

  involving vertically-disposed water tubes {(F22B37/645 takes precedence)} · CPC title