Title:
METHOD FOR REPLACING FURNACE WALL TUBE
Document Type and Number:
WIPO Patent Application WO/2019/176641
Kind Code:
A1
Abstract:
This method for replacing a furnace wall tube of a furnace wall of a boiler comprises: an identification step for identifying a furnace wall replacement portion which contains a furnace wall tube replacement portion, which is a portion of the length direction of at least one of a plurality of furnace wall tubes; a cutting step for cutting the furnace wall replacement portion from the outside of the furnace of the boiler; a removal step for removing the cut furnace wall replacement portion from the furnace wall to the outside of the furnace of the boiler; a first welding step for circumferentially welding, from the outside of the furnace of the boiler, a furnace wall tube renewal portion which corresponds to the furnace wall replacement portion which was removed from the furnace wall, and the furnace wall tube from which the furnace wall replacement portion was removed; and a second welding step for fitting a fin part renewal portion, which corresponds to a portion of a fin part contained in the furnace wall replacement portion removed from the furnace wall, from the outside of the furnace of the boiler into the furnace wall and welding the result after the first welding step.
Inventors:
MATSUI MASAKAZU (JP)
Application Number:
PCT/JP2019/008561
Publication Date:
September 19, 2019
Filing Date:
March 05, 2019
Export Citation:
Assignee:
MITSUBISHI HITACHI POWER SYS (JP)
International Classes:
F23M5/08; B23K9/00; B23K9/32; F22B37/02
Domestic Patent References:
| WO2008148636A1 | 2008-12-11 |
Foreign References:
| JPH07132420A | 1995-05-23 | |||
| JP4442763B2 | 2010-03-31 | |||
| JPH11277238A | 1999-10-12 | |||
| JPH0715162U | 1995-03-14 | |||
| JP2011005516A | 2011-01-13 | |||
| JP2010531235A | 2010-09-24 | |||
| JP2000061674A | 2000-02-29 | |||
| JPH10244365A | 1998-09-14 | |||
| JPH09303706A | 1997-11-28 | |||
| JPH09296903A | 1997-11-18 |
Attorney, Agent or Firm:
SEISHIN IP PATENT FIRM, P.C. (JP)
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