This study analyzes the reconstruction and subsequent damage to boiler screen tubes in the BKZ-160-100-GM boilers, highlighting key engineering challenges and solutions. Originally designed with a steam productivity of 160 t/h, these boilers were modified to increase output to 210 t/h, necessitating updates to the chemical water treatment system. By implementing a chelant-based regimen using trilon B, the water quality was significantly improved, reducing hardness and conductivity and enhancing boiler performance.
However, despite these upgrades, widespread screen tube damage was observed, particularly in tubes subject to high salt concentrations. Through a detailed analysis, the main causes were identified as metal corrosion and localized overheating, likely triggered by internal deposits detaching and creating steam layers along the tube walls. These conditions accelerated corrosion and led to metal ruptures, impacting boiler efficiency and reliability.
The findings highlight the importance of circulation stability and optimal chemical treatment in preventing damage, setting the foundation for improved maintenance strategies in power plant boilers. For a comprehensive look at the methodologies and technical insights.
full text: https://www.igminresearch.com/articles/html/igmin168
DOI Link: 10.61927/igmin168
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