The causes of tube breakage in operation of the Russian made baffle plate tubular heat exchanger for closed-loop cooling water in Huaneng Shantou Power Plant have been analysed.It is believed that the main cause resulted in tube breakage in said heat exchanger is the vibration of tubes in the heat exchanger due to the horizontal flow speed of closed-loop cooling water at inlet and outlet of the heat-exchanger being larger than the critical speed.The retrofit measures

such as adopting baffle rod tubular heat exchanger

reducing the horizontal flow speed of closed-loop cooling water

etc.

have been put forward.After retrofitting according to said measures

the troubles of tube vibration and breakage in the heat exchanger have been eliminated

and the problem of insufficient area of the heat exchanger being solved.Through long-term application of the baffle rod tubular heat exchanger

the effectiveness is better.