In view of excessive dew temperature of hydrogen during the operation of No.2 hydrogen cooling electric generator of Guodian Power Handan Dongjiao Thermal Power Plant Co.

Ltd

the hydrogen drying system

the hydrogen Cooling system and the sealing oil system were investigated

and influences were analyzed of unit load increase on hydrogen humidity

of accumulated water in the pipe of exhaust fan on hydrogen leakage and hydrogen dew point temperature of steam end seal oil

etc.. It is considered that the main reasons for the increase of hydrogen dew point temperature of the generator lie in sealing oil with water and accumulated water in the pipe of exhaust fan

and treatment measures are suggested.