Failure Analysis of Boiler Water Wall Tube for Power Generation in District Heating

2018 ◽  
Keyword(s):  
Power Generation ◽  
Failure Analysis ◽  
District Heating ◽  
Boiler Water ◽  
Water Wall ◽  
Water Wall Tube

Failure Analysis of a Water Wall Boiler Tube for Power Generation in a District Heating System

2019 ◽  
Vol 25 (5) ◽  
pp. 1191-1201 ◽  
Author(s):  
Minki Hong ◽  
Hobyung Chae ◽  
Woo Cheol Kim ◽  
Jung-Gu Kim ◽  
Heesan Kim ◽  
...  
Keyword(s):  
Power Generation ◽  
Failure Analysis ◽  
District Heating ◽  
Heating System ◽  
Boiler Tube ◽  
District Heating System ◽  
Water Wall

scholarly journals Failure analysis of the boiler water-wall tube

2017 ◽  
Vol 9 ◽  
pp. 35-39 ◽  
Author(s):  
S.W. Liu ◽  
W.Z. Wang ◽  
C.J. Liu
Keyword(s):  
Failure Analysis ◽  
Boiler Water ◽  
Water Wall ◽  
Water Wall Tube

scholarly journals Simulation and optimization of water-wall tube panels design for power boilers

2019 ◽  
Vol 298 ◽  
pp. 00112
Author(s):  
Maxim P. Kurepin ◽  
Mikhail Yu. Serbinovskiy
Keyword(s):  
Computation Time ◽  
Optimization Method ◽  
Structure Design ◽  
Wall Structure ◽  
Orthotropic Plates ◽  
Boiler Water ◽  
Simulation And Optimization ◽  
Water Wall ◽  
State Models ◽  
Water Wall Tube

The article presents a water-wall tube panels simulation technique that uses finite element method as well as the power boiler water-wall structure design optimization method. Results of the proposed method verification and its application to the design of boilers of different capacities are discussed. The technique is to replace water-wall tube panels with equivalent plates. Replacement plates’ parameters calculation is reported, panels one-way heating metering is described. Optimization of the water-wall structure design is carried out in two stages: at the first stage, water-wall tube panels are replaced with orthotropic plates; at the second stage, sub-simulation with solid models is used to identify problem areas of the design. Solid-state models of the problem areas get connected to the orthotropic plates at calculated boundary conditions. The described approach improves accuracy of the simulation results and significantly reduces the models complexity and its computation time. The proposed simulation and optimization method has been tested and successfully applied to design power steam boilers with steam generating capacity of 500, 1030 and 1900 tons of steam per hour. As a result, while maintaining the specified reliability and durability, significant reduction of metal content in boiler structure is achieved.

Failure Analysis and Welding Repair for Water Wall Connection Tube Burst of SA210C Steel

2014 ◽  
Vol 998-999 ◽  
pp. 422-425 ◽  
Author(s):  
Xiang Feng Zheng ◽  
Nan Wu ◽  
Yun Jian Jiang ◽  
Wen Bin Li ◽  
Xiao Jun Hao ◽  
...  
Keyword(s):  
Residual Stress ◽  
Chemical Analysis ◽  
Failure Analysis ◽  
Heat Input ◽  
Mechanical Analysis ◽  
Raw Material ◽  
Material Defects ◽  
Microscope Analysis ◽  
Water Wall ◽  
Water Wall Tube

Through methods, such as microscope analysis, mechanical analysis, chemical analysis, metallography examination etc, the causes resulting in water wall tube bursting of 300MW station boiler have been analyzed. The raw material defects is the primarily inducement of bursting failure. In welding tube, the measures of reducing residual stress, such as lower welding heat input, reducing thickness of welding layer and so on, were taken. The welding repair succeeded greatly.

scholarly journals Failure analysis of a water wall tube

2020 ◽  
Vol 1635 ◽  
pp. 012072
Author(s):  
Facai Ren ◽  
Jinsha Xu ◽  
Jun Si
Keyword(s):  
Failure Analysis ◽  
Water Wall ◽  
Water Wall Tube

Failure Analysis of Water-Wall Tubes in the High-Pressure Boiler

2014 ◽  
Vol 912-914 ◽  
pp. 456-459
Author(s):  
Na Xu ◽  
Jun Bo Shi ◽  
Yong De Li ◽  
Wei Min Guo ◽  
Xiao Feng Wu ◽  
...  
Keyword(s):  
High Pressure ◽  
Failure Analysis ◽  
Pitting Corrosion ◽  
Failure Process ◽  
Surface Damage ◽  
Metallographic Examination ◽  
Boiler Water ◽  
Corrosion Failure ◽  
Water Wall ◽  
Sulfide Corrosion

In this case study, the corrosion failure analysis of high-pressure boiler water-wall tubes in a power plant was investigated by means of the chemical analysis, metallographic examination and scanning electron microscope (SEM) observation. Energy dispersive spectroscopy (EDS) was used to examine the changes of test materials and corrosion products. Based on the failure process of the boiler water-wall tubes and the experimental results, a conclusion was drawn that the failure of water-wall tubes was mainly caused by pitting corrosion. Sulfide and chloride attack was the major cause of localized pitting corrosion on the inner surface, and the outer surface damage was mainly due to the synergism of high temperature sulfide corrosion and flue gas erosion.

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