It is shown that the main cause of damage to the waterwall tubes of the middle radiant section (MRS) is the dismantling of the washing-and-separation equipment in all the PK-24 boilers and, as a result, the ingress of a significant amount of moisture from the transition zone into the MRP tubes. Based on the analysis of the hydraulic regime and the test results, it was established that the moisture entering the MRP is distributed extremely nonuniformly over the tubes. It is shown that the major amount of moisture enters the tubes located along the lower generatrix of the inlet header and connected to the blind end. Most of the damage is concentrated in the horizontal sections of these tubes due to the stratification of the steam-water mixture, cyclic temperature fluctuations in the tube wall on the fireside, which leads to the destruction of the protective magnetite film and steam-water corrosion. Measures have been developed to improve the reliability of the MRP tubes and the boiler as a whole.
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References
Standard Instructions SO 34.37.306–2001 (153-34.1-37.306–2001). Standard Procedure for Monitoring the Condition of the Permanent Equipment of Thermal Power Plants, Determining the Amount and Composition of Deposits [in Russian], OAO VTI, Moscow (2003).
Operating Rules and Regulations for Power Plants and Grids of the Russian Federation [in Russian], Appr. order No. 229 of the Ministry for the Power Generating Industry of Russia of 19.06.03, SPO ORGRES, Moscow (2003).
Standard Instructions RD 24.031.121–2007(MU). Equipping Stationary Steam Boilers with Steam and Water Sampling Devices [in Russian], NPO TsKTI, St. Petersburg (2007).
O. M. Baldina, V. A. Lokshin, and D. F. Peterson, et al., Hydraulic Design of Boiler Units (Standard Method) [in Russian], Énergiya, Moscow (1978).
Z. L. Miropol’skii and R. I. Shneerova, “Generalization of experimental data on the temperature conditions of the metal of the horizontal and weakly sloping inclined evaporating tubes,” Teploénergetika, No. 3, 56 – 60 (1958).
V. I. Trembovlya, E. D. Figner, and A. A. Avdeeva, Thermal Tests of Boiler Units [in Russian], Énergoatomizdat, Moscow (1991).
Guidelines: Design of Supercritical Sliding-Pressure Boilers [in Russian], NPO TsKTI, Leningrad (1988).
I. B. Godik, “The mechanism of occurrence of a nonuniform field of steam qualities during distribution of two-phase fluid from the horizontal header to the waterwall tubes of a steam generator,” Teploénergetika, No. 11, 44 – 50 (1976).
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Translated from Élektricheskie Stantsii, No. 6, June 2022, pp. 2 – 9. DOI: https://doi.org/10.34831/EP.2022.1091.6.001
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Fedorov, A.I. Analysis of the Causes of Damage to the Waterwall Tubes of the Middle Radiant Section and the Results of Testing a PK-24 Boiler. Power Technol Eng 56, 566–573 (2022). https://doi.org/10.1007/s10749-023-01556-2
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DOI: https://doi.org/10.1007/s10749-023-01556-2