RBI Technology for Boiler Superheater of Power Station

2010 ◽  
Author(s):  
Fujun Liu ◽  
Shoubao Ding ◽  
Shuai Kong ◽  
Dan Song ◽  
Dongming Hu ◽  
...  
Keyword(s):  
High Temperature ◽  
Petrochemical Industry ◽  
Failure Mechanisms ◽  
Economic Loss ◽  
Probability Of Failure ◽  
Water Cooling ◽  
Remaining Life ◽  
Power Station ◽  
Modification Factor ◽  
Power Station Boiler

Risk-Based Inspection (RBI) has been wide used in petrochemical industry all over world with good performance. But its application in power station boiler is rarely reported. The “four tubes” of the power station boiler, namely economizer, water-cooling wall, superheater and reheater tubes, are prone to blast due to the direct fire heating, and it causes non-plan shutdown and leads to severe influence to safety. In this paper, the failure mechanisms of power station boiler were analyzed, the calculation of modification factors for high-temperature smoke erosion and high-temperature creep was researched. Considering the specific situations in China, the probability of failure modification factor based on remaining life was proposed. Then, the method of economic loss calculation was established based on the differences between the petrochemical equipment and the power station boilers, and the proper classification scope was established according an investigation. At last, a superheater project was carried out, the risk was fixed and the proper management and inspection suggestions were proposed.

Research and Application of Risk Assessment Methodology for Power Station Boiler Superheaters

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Fujun Liu ◽  
Shuai Kong ◽  
Zhangwei Ling ◽  
Qiang Li ◽  
Yueqiang Qian ◽  
...  
Keyword(s):  
Risk Assessment ◽  
High Temperature ◽  
Good Effect ◽  
Power Station ◽  
Knowledge Application ◽  
Risk Levels ◽  
Modification Factor ◽  
Erosion Factor ◽  
Equipment And Pipelines ◽  
Risk Assessment Methodology

Risk-based inspection (RBI) has been applied to good effect in relation to pieces of equipment and pipelines in the petrochemical industry worldwide, but to the best of our knowledge application of RBI to power station boilers has not hitherto been reported. The tubes of the four key components, namely, the economizer, the water-cooling wall, the superheater, and the reheater, are prone to blast due to direct fire heating. Such a blast always causes unplanned shutdown and has severe safety implications. Based on the “API 581-2000” code (Risk-Based Inspection Base Resource), the failure mechanisms of power station boilers have been studied, and the high-temperature smoke erosion factor and high-temperature creep factor have been calculated. Then, considering specific situations in China, such as material quality and extended service, a failure modification factor based on remaining life has been proposed. Finally, two risk assessment projects have been carried out; after delineating the risk levels of the tubes, appropriate management suggestions have been proposed. The obtained data should provide some technical support for the application of RBI to power station boilers.

Erosion Wastage at High Temperature for Arc Spraying Coatings

2008 ◽  
Vol 373-374 ◽  
pp. 605-608
Author(s):  
J.Z. Hu ◽  
Shi Ning Ma ◽  
X.R. Chen
Keyword(s):  
High Temperature ◽  
Erosion Resistance ◽  
Resistance Rate ◽  
Arc Spraying ◽  
Impingement Angle ◽  
Power Station ◽  
Cored Wire ◽  
Intermetallic Coating ◽  
New Novel ◽  
Power Station Boiler

A new novel cored wire for producing FeCrAl/WC intermetallic coating by arc spraying was developed. The erosion wastage at high temperature of the coating was researched with different impingement angles and temperatures. The results indicated that impingement angle and temperature greatly affected erosion wastage of the coating. At the same time, when impingement angle was 90°, different temperature had a little effect on the erosion wastage. And when temperature was 650°C, different impingement angle had a little effect on the erosion wastage too. As compared with water wall tube material (G20 steel) of power station boiler, the erosion resistance at high temperature of the coating was higher. The erosion resistance rate of the coating was 1.94~2.89 times of that of G20 steel when temperature was 650°C and particle was polygonal silica. The results indicated that erosive condition of high temperature flue gas and fly ash mixture in boiler tube of pulverized coal fired power station could be solved with the FeCrAl/WC coating.

SANDVIK 12R72HV

Alloy Digest ◽  
1970 ◽  
Vol 19 (12) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Petrochemical Industry ◽  
Heat Treating ◽  
Metal Temperature ◽  
Temperature Performance

Abstract SANDVIK 12R72HV is an austenitic chromium-nickel-molybdenum-titanium stainless steel suitable for metal temperature up to about 308 in the power industry and the petrochemical industry. Typical applications are superheater tubes and hydrocarbon crackers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and surface treatment. Filing Code: SS-248. Producer or source: Sandvik.

scholarly journals Research on Prediction of Vertical Water Wall Temperature of Power Station Boiler Based on Deep Learning and Expert Experience

2021 ◽  
Vol 1922 (1) ◽  
pp. 012011
Author(s):  
Xian-tao Du ◽  
Yu-jia Cui ◽  
Ming-hao Wang ◽  
Liang-wei Xia ◽  
Qiang Yu ◽  
...  
Keyword(s):  
Deep Learning ◽  
Wall Temperature ◽  
Power Station ◽  
Water Wall ◽  
Power Station Boiler
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