The failure of boiler tubes in thermal power units will cause non shutdown of units and greater economic losses. Deposits in boiler tubes are an important reason for their failure

and reducing deposits in boiler tubes is of great significance to the safe and stable operation of units. It is found that the formation of deposits is related to many factors

such as overheating of furnace tubes

high heat load

poor water vapor quality

water vapor phase transition

working medium disturbance and pipe surface defects. Combined with the flexibility of units

deep peak shaving operation

environmental protection reform and other conditions

the formation mechanism and influencing factors of various types of deposits are analyzed with actual accident case pictures. The effects of overheating

salt concentration and corrosion under scale caused by deposits in furnace tubes are further discussed. The countermeasures for feedwater quality

boiler shutdown protection

unit startup steam purification

unit peak shaving

boiler tube replacement

boiler transformation and maintenance are proposed

which can effectively reduce the generation of boiler heating surface deposits and reduce the risk of boiler tube failure.