Thermal Power Equipment Tubes Damage Analysis
Abstract
Ensuring the reliability of energy equipment is an important task for supplying the population with affordable electrical and thermal energy. Extensive operational experience and conducted scientific research have significantly increased the reliability of power installations, but it is still not possible to eliminate damage to their components completely. In boilers, most of the elements of the power plant are made up of various tubes. Long-term reliable operation of the equipment is only possible by localizing the cause of the damage and eliminating the factor that caused it. In some cases, determining the primary cause of an accident is difficult.
The article proposes a graphical method for analyzing the damaged tubes of boiler heating surfaces. Using a graphical method of comparing the original tube size and the damaged sample under investigation, the damage causes are localized. The comparison of cross-sections can limit and identify the factors that caused the reduction in system reliability. The following factor served as the initial premise: damage from combustion products will result in damage to the outer surface of the tube, while damage to the tube caused by the working fluid will result in damage to the inner surface of the tube.
The article presents a developed methodology for analyzing the causes of tube damage and lists the main requirements imposed on the graphical method. Based on the proposed method, an analysis of the studied samples was conducted, the damage of which was caused by various factors. The riser pipe of the low-pressure circuit, with dimensions of 108×6 mm, had changed in its inner surface due to intensive erosive impact from a two-phase flow jet. The outer surface wall of the tube remained unchanged. The tube with dimensions of 38×4 mm had damage from combustion products, caused by intensive dynamic impact of the flow jet from the leak in the adjacent tube. The flow part related to the working fluid remained undamaged. It is shown that the graphical method of analysis does not require specialized expensive equipment and can be performed directly at the station.
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Для цитирования: Плешанов К.А., Маслов Р.С., Коршунов Т.М., Лихолетова В.С. Анализ повреждения труб теплоэнергетического оборудования // Вестник МЭИ. 2024. № 4. С. 74—79. DOI: 10.24160/1993-6982-2024-4-74-79
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Конфликт интересов: авторы заявляют об отсутствии конфликта интересов
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For citation: Pleshanov K.A., Maslov R.S., Korshunov T.M., Likholetova V.S. Thermal Power Equipment Tubes Damage Analysis. Bulletin of MPEI. 2024;4:74—79. (in Russian). DOI: 10.24160/1993-6982-2024-4-74-79
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Conflict of interests: the authors declare no conflict of interest
