Failure Analysis of Pressure Components in a Thermal Power Plant
In order to analyze the failure mechanism of the main pressure bearing components in thermal power plants,and to address the problems of leakage failure of the wall tube superheater and circulating water pump in thermal power plants,the causes of leakage failure of the wall tube superheater were analyzed through hardness testing and macroscopic observation.Using macroscopic observation,material analysis,and metallographic analysis methods,the causes of the failure of the circulating water pump were analyzed,and the safety production prevention measures were proposed.The results showed that the leakage failure of the wall mounted superheater tube was caused by improper installation of fins,which led to the leakage of flue gas flushing the tube wall.The leakage failure of the circulating water pump was caused by the detachment of the half retaining ring.Replacing the ceiling wall mounted superheater tube bundle and hanging tube bundle,cleaning the dust accumulation on the air preheater plate,can completely eliminate this hidden danger,and put the boiler back into stable operation for 162 days.After replacing the fixing bolts of the relevant components of the circulating water pump and treating the corroded parts in the protective tube and sleeve,the circulating water pump is still operating normally and is still in normal use up to now.
pressure partsbecame invalidwall covering superheatercirculating water pump
国家科技期刊平台
NSTL
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