By analyzing the operation status of internal cooling water treatment system of 330 MW generating unit

the typical problems are put forward

and technical reformation measures are taken to solve the problems. The original small mixed bed treatment process is changed into parallel separate bed treatment process. Since the implementation of the technical transformation for two years

the water quality has reached the standard in an all-round way and achieved good practical results

which provides a guarantee for the safe operation of generators and can be used as a reference for the selection of internal cooling water treatment devices of the same type of units.