Causes of damage to baffle pipes in high-pressure drum boilers at the Ust’-Ilimsk heat and electric power plant

The causes of damage to the baffle pipes in BKZ-420-140PT-2 high-pressure drum boilers during combustion of Irsha-Borodin and Zheronskii coals are analyzed. Damage to the salt module pipes was caused by the buildup of internal sediments and untimely chemical washing of the baffles. Flaws and bulging...

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Bibliographic Details
Published in:Power technology and engineering 2008-11, Vol.42 (6), p.344-348
Main Authors: Belyakov, I. I., Breus, V. I., Litvinova, L. A., Poloskov, V. A.
Format: Article
Language:English
Subjects:
Electrical Machines and Networks
Energy
Energy Systems
Foundations
Geoengineering
Hydraulics
Power Electronics
Renewable and Green Energy
Thermal Electric Power Stations
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Summary:The causes of damage to the baffle pipes in BKZ-420-140PT-2 high-pressure drum boilers during combustion of Irsha-Borodin and Zheronskii coals are analyzed. Damage to the salt module pipes was caused by the buildup of internal sediments and untimely chemical washing of the baffles. Flaws and bulging of the clean module pipes in the constriction region are caused by insufficient flow velocities in the 76/62-mm diameter pipes and high thermal loads during burning of Zheronskii coal. The fundamental solution for increasing the reliability of the boilers is to rebuild them with conversion to dry slag removal.
ISSN:1570-145X
1570-1468
DOI:10.1007/s10749-009-0058-7