Hello all,
We have a large HRSG with 3 pressure (Chinese manufacturer). Every shutdown we face a serious problem, that is during HRSG shutdown, our HP drum upper and lower temperature difference increases too much (>50 degree). Which is totally forbidden. But we try to maintain full level of water also reduce drum pressure very very slowly, but why this metal temperature difference increases sharply , we could not find the real reason.
It would be helpful for me if anyone suggest me any innovative way to control this. I will follow that next time.
Thnk you
We have a large HRSG with 3 pressure (Chinese manufacturer). Every shutdown we face a serious problem, that is during HRSG shutdown, our HP drum upper and lower temperature difference increases too much (>50 degree). Which is totally forbidden. But we try to maintain full level of water also reduce drum pressure very very slowly, but why this metal temperature difference increases sharply , we could not find the real reason.
It would be helpful for me if anyone suggest me any innovative way to control this. I will follow that next time.
Thnk you