Title:
METHOD AND APPARATUS FOR IMPROVING STEAM OXIDATION RESISTANCE OF SMALL-DIAMETER BOILER TUBE OF COAL-FIRED BOILER
Document Type and Number:
WIPO Patent Application WO/2024/087798
Kind Code:
A1
Abstract:
A method and apparatus for improving steam oxidation resistance of a small-diameter boiler tube of a coal-fired boiler. The method comprises the following steps: cutting a boiler tube panel (14) from a boiler ceiling (15) and vertically hoisting and fixing same, and cutting out a section from the bottom of the lower elbow of the boiler tube panel (14); cleaning the inner tube wall of each tube in the boiler tube panel (14); sintering an anti-oxidation coating on the inner tube wall of each tube in the boiler tube panel (14); and welding and repairing each sintered tube in the boiler tube panel (14). According to the method, all construction processes can be completed in a hearth during boiler shutdown for maintenance, so that the production efficiency is high, and the maintenance period can be remarkably shortened; moreover, a steam oxidation resistance layer can be formed on the inner wall of the small-diameter boiler tube, so that the steam oxidation resistance of the small-diameter boiler tube of an in-service coal-fired boiler can be greatly improved.
Inventors:
LU JINTAO (CN)
HUANG JINYANG (CN)
ZHANG XINGXING (CN)
YANG ZHEN (CN)
ZHOU YONGLI (CN)
DANG YINGYING (CN)
LI LIMIN (CN)
YUAN YONG (CN)
HUANG JINYANG (CN)
ZHANG XINGXING (CN)
YANG ZHEN (CN)
ZHOU YONGLI (CN)
DANG YINGYING (CN)
LI LIMIN (CN)
YUAN YONG (CN)
Application Number:
PCT/CN2023/111967
Publication Date:
May 02, 2024
Filing Date:
August 09, 2023
Export Citation:
Assignee:
XIAN THERMAL POWER RES INSTITUTE CO LTD (CN)
International Classes:
C23C22/33; F22B37/02; F28F19/02
Attorney, Agent or Firm:
SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD. (CN)
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