High-temperature corrosion behavior of S30432 in high-efficiency ultra-supercritical boiler burning low-alkali and high-sulfur coal
Source abstract
Abstract
Abstract In this study, the resistance of S30432 to low-alkali coal ash corrosion in a high-efficiency USC boiler was investigated. Currently, S30432 is widely used in the high-temperature superheater and reheater of boilers burning low-alkali and high-sulfur coal. During the experiment, S30432 coated with low-alkali coal ash were fixed in a high-temperature tubular reactor, and hot gas at 650 °C and 700 °C containing SO2 passed over the specimens for 2000 h. Then the specimens were tested by X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. It was found that S30432 specimens mainly underwent high-temperature oxidation. For the gas temperature of 700 °C and SO2 volume concentration of 0.35 %, the sulfidation reaction occurred and the weight change was only 1.08 mg cm−2. The results show that there is no obvious high-temperature corrosion after three years of operation of a 700 MW 620 °C boiler. The results are in contrast with the high-alkali coal ash corrosion resistance of S30432. It is concluded that S30432 can meet the requirements of a high-efficiency USC boiler burning low-alkali and high-sulfur coal.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Thermochemical Biomass Conversion Processes · Coal Combustion and Slurry Processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Multiphase Flow in Power Engineering , Xian Jiaotong University , Xi’an , Shaanxi , China
Dongfang Boiler Group Co., Ltd. , Chengdu 611731 , China
Clean Combustion and Flue Gas Purification Key Laboratory of Sichuan Province , Chengdu , Sichuan , China
Dongfang Boiler Group Co., Ltd. , Zigong , Sichuan , China
References (35)
Show source-provided references
1. Bakker, W.T., Blough, J.L., Wolowodiuk, W., and Kihara, S. (1989). Proceedings of the American power conference, april 24-25, 1989. American Power Conference, Chicago, IL, USA.
2. Birks, N., Meier, G., and Pettit, S. (2014). Introduction to the high-temperature oxidation of metals. Cambridge University Press, Cambridge, pp. 273–282.
3. Blough, J.L. and Stanko, G.J. (1997). Nace - international corrosion conference series, march 9-14, 1997. Corrosion, New Orleans, LA, USA.
4. Borio, R.W. and Hensel, R.P. (1972). Coal-ash composition as related to high-temperature fireside corrosion and sulfur-oxides emission control. J. Eng. Gas Turbines Power 94: 142–148, https://doi.org/10.1115/1.3445651.10.1115/1.3445651 ↗
5. Borio, R.W., Plumley, A.L., and Sylvester, W.R. (1978). Proceedings of the international Conference on ash Deposits and Corrosion from Impurities in combust gases, June 26-july 1, 1977. Boiler Corrosion and Deposits, Henniker, NH, USA.
6. Cain, C. and Nelson, W. (1961). Corrosion of superheaters and reheaters of pulverized-coal-fired boilers. II. J. Eng. Gas Turbines Power 82: 194–201, https://doi.org/10.1115/1.3673237.10.1115/1.3672760 ↗
7. China Electricity Council (2021). Analysis and forecast of China power demand-supply situation 2020-2021, Available at: http://www.cec.org.cn.
8. China Federation of Electric Power Enterprises (2021). Proposal from CLP to coal-fired power generation enterprises, Available at: http://www.cec.org.cn/detail/index.html.
9. China National Development and Reform Commission (2021). Implementation plan of national coal power unit transformation and upgrading, Available at: https://www.ndrc.gov.cn.
10. Electric Power Planning and Engineering Institute (2016). Technical feasibility workshop meeting Minutes for 650°C ultra-supercritical coal-fired generating unit, Available at: http://www.eppei.ceec.net.cn/art/2016/6/12/art_50133_2319806.html.
11. Financial Association (2021). National Development and Reform Commission: the overall level of coal-fired power units in China is the most advanced in the world, Available at: http://i.ifeng.com/c/8AJNUQ6cGzA.
12. Feng, X.Y., Li, L., Yu, Y., and Sang, X.L. (2016). Tin removal from tin-bearing iron concentrates through reduction-sulfidation roasting using high sulfur coal. Chin. J. Nonferrous Met. 26: 1990–1997.
13. Gao, H.T., Fan, H.J., and Dong, J.C. (2014). Development trend of ultra supercritical double-reheater boilers. Boilers Technol. 45: 1–3.
14. Guo, Y., Wang, B.H., Hou, S.F., Zhou, R.C., and Bi, K. (2014). Aging precipitates of alloy 617 mod used for 700°C ultra supercritical unit. Proc. CSEE 34: 2314–2318.
15. Hussain, T., Syed, A.U., and Simms, N.J. (2013). Trends in fireside corrosion damage to superheaters in air and oxy-firing of coal/biomass. Fuel 113: 787–797, https://doi.org/10.1016/j.fuel.2013.04.005.10.1016/j.fuel.2013.04.005 ↗
16. Jiang, M.H. and Huang, B. (2012). Prospects on coal-fired power generation technology development. Proc. CSEE 32: 1–8.
17. Kihara, S., OhtomoNakagawa, K., Ohtomo, A., Aoki, H., and Ando, S. (1984). Simulating test results for fireside corrosion of superheater and reheater tubes operated at advanced steam condition in coal-fired boilers. J. Met. 36: 21–27.
18. Lang, L.P. and Li, Y.K. (2019). Exploration and prevention of high temperature corrosion mechanism of platen superheater. Boiler Manufacturing 4: 8–10.
19. Li, M.S. (2001). High temperature corrosion of metals. Metallurgical Industry Press, Beijing.
20. Li, J. (2009). Discussion on solutions of high temperature corrosion of heating surface for coal-fired boiler. Inner Mongolia Electric Power 27: 26–32.
21. Lin, F.S., Xie, X.S., Zhao, S.Q., and Dong, J.X. (2011). Selection of superalloys for superheater tubes of domestic 700°C A-USC boilers. J. Chin. Soc. Power Eng. 31: 960–968.
22. Liu, G.M., Liu, K.S., Mao, X.F., Wan, Z., and Wang, Y. (2017). Hot corrosion of T91 steel in molten mixture of KCl+Na2SO4+K2SO4. J. Chin. Soc. Corros. Prot. 37: 23–28.
23. Liu, Y.G., Liu, Y.H., Mo, C.H., Zhang, M.Q., Dong, M., Pan, S.C., and Ran, S.M. (2022). High-temperature corrosion behavior of S30432 and TP310HCbN coatings in simulated 620°C ultra-supercritical boiler coal ash/gas environment. Mater. Corros. 73: 1222–1235, https://doi.org/10.1002/maco.202113014.10.1002/maco.202113014 ↗
24. Mao, J.X. (2013). Latest development of high-temperature metallic materials in 700°C ultra-supercritical units. China Academic Journal Electronic Publishing House 34: 69–75.
25. Mao, X.F., Zuo, Z.X., Wang, Z.H., and Dong, Z.J. (2019). High temperature corrosion control for water wall of a tangentially-fired boiler firing high sulfur coal. Therm. Power Conf. 48: 98–103.
26. National Energy Administration (2021). The power consumption of the whole society increased by 10.3% year-on-year in 2021, Available at: http://www.nea.gov.cn.
27. Plumley, A.L., Accort, J.I., and Roczniak, W.R. (1979). Evaluation of boiler-tube materials for advanced power cycles. In: NACE-DOE conference.
28. Ren, S.P. (2016). Study on corrosion behavior of three kinds of austenitic steels in simulated flue-gas/coal-ash environments. Nanchang Hangkong University, Nanchang, (in Chinese).
29. Stein, G., Norling, R., Viklund, P., Maier, J., and Scheffknecht, G. (2014). Fireside corrosion during oxyfuel combustion considering various SO2 contents. Energy Procedia 51: 135–147, https://doi.org/10.1016/j.egypro.2014.07.015.10.1016/j.egypro.2014.07.015 ↗
30. Stringer, J. (1987). High-temperature corrosion of superalloys. Mater. Sci. Technol. 3: 562–570, https://doi.org/10.1080/02670836.1987.11782259.10.1080/02670836.1987.11782259 ↗
31. Wang, T.B. and Gong, X.M. (2007). Study on environmental protection profit of selecting main steam parameters in thermal power plants. Therm. Power Conf. 248: 9–12.
32. Wang, Y.M., Mu, C.H., Yao, M.Y., Ning, Z., and Xue, J.Z. (2017). Review of the development and application of double-reheater power generation technology. Therm. Power Conf. 46: 1–10.
33. Weele, S.V., Blough, J.L., and Devan, J.H. (1994). Attack of superheater tube alloys, coatings, and claddings by coal-ash corrosion Corrosion. Technical Report. U.S. Department of Energy, Available at: https://www.osti.gov/servlets/purl/10139755.
34. Xu, J. and Zhou, Y.G. (2012). The development of 700°C UCS technology. Sino-Global Energy 17: 13–17.10.1016/j.egypro.2012.02.158 ↗
35. Zeng, Z., Natesan, K., Cai, Z., and Rink, D.L. (2014). Effect of coal ash on the performance of alloys in simulated oxy-fuel environments. Fuel 117: 133–145, https://doi.org/10.1016/j.fuel.2013.09.021.10.1016/j.fuel.2013.09.021 ↗