Directing against the problems of surpassing set standard for dissolved oxygen in condensate during the time of practical operation of 2×300 MW units in Heze Power Plant

Combining with the back-water operation mode of make-up water for the condenser

sealing water of the condensate pump

and sealing water of the feed-water pump

analysis has been carried out

to find out the causes leading to surpassing set standard for dissolved oxygen in the condensate.Through retrofit

the dissolved oxygen in condensate has reduced to below 30μg/L

reaching set standard in operation.At the same time

the tightness of vacuum in units has also improved.