Is the condensate pump not pumping enough water?
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The temperature of the condensate tank is 115°C, and the pressure is 0.10 Mpa. The steam at 0.6 Mpa is sent to the desuperheater via the outlet of the condensate pump for cooling; the head of the condensate pump is 140 m. But after starting the pump, the outlet pressure is normal and the pump’s operating current is also normal; however, there is no flow. What could be the reason? The pipeline is not blocked.
The outlet pressure of the pump is normal, but there is no flow – this is somewhat contradictory. Please first rule out any faults in the measuring instruments. To determine whether there is flow at the pump’s outlet, it is also possible to assess it based on the performance of the temperature and pressure reduction systems
As long as the pump temperature does not rise, it is operating within normal parameters; otherwise, overheating occurs.
How can the outlet pressure and current remain normal in the absence of flow? It’s unreasonable; the condensate pump fails to deliver sufficient flow because there are gases in the condensate.
Check the pipeline to see if there is a bypass. The pressure and current are normal, which indicates that there should be no problem with the pump; check the pipes.
With normal pressure and current, it should not be a problem with the pump. Check whether the pipeline flow is going through the bypass valve or there is an issue with the flow meter. It is possible that the signal wire of a digital flow meter is not making proper contact.
That makes sense; it might be something like a bypass return flow.
The final investigation revealed that the problem was with the gate valve in the temperature regulator, which prevented an adequate flow.
The final investigation revealed that the problem was with the gate valve in the temperature regulator, which prevented an adequate flow.
There is indeed a reason for this as well; sometimes the condensate pump doesn’t start properly because the condensate contains vapor.