l Centrifugal pump problems
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Ladies and gentlemen, we have a centrifugal pump in our system, which is a pump used at the bottom of a stripping tower. Due to poor gas performance, this pump remains in a state of evacuation or partial evacuation. There is a control valve at the pump outlet to regulate the flow rate at the pump outlet, thereby controlling the liquid level in the stripping tower. Due to poor flow rate at the pump, we often have to go to the site to open the control valve bypass. We encountered such a problem: sometimes the liquid level rose very quickly. We went to the site to open the bypass valve; the flow meter at the pump outlet indicated that the flow rate had increased. According to mass balance, this amount should have been sufficient to lower the liquid level in the stripping tower. Yet, on the contrary, the liquid level continued to rise. When it reached a very high level, it suddenly started dropping again. We immediately closed the bypass line, and eventually we closed all the control valves as well. Nevertheless, the liquid level kept dropping sharply, only to rise again once it reached a low level. I know it’s caused by an issue with the pump’s flow rate, but the flow rate isn’t synchronized with the level in the stripping tower. What exactly is the reason for this? Could someone please explain it to me? Thank you in advance! ! !
It might not be just a pump issue; the level display is also problematic. Is there a level gauge on site? If so, check it accordingly
It could be a false level – the feed pipe is not filled with liquid but contains gas, which causes the level to fluctuate. The primary issue is to resolve the pump evacuation problem.
I agree with the two people above; it should be caused by fluctuations in the liquid level.
If it’s a problem with the level gauge, then sometimes when the pump is operating properly, such issues do not occur
Check whether the inlet valve is fully open and whether the bottom valve is clogged, as these can all cause unstable flow. For more details, please click Unstable Traffic.
It’s likely a problem with the material that prevents the pump from pumping at all, which is why the liquid level rises; stop it for a while and then restart it
I think it’s quite likely that the level gauge is showing an incorrect level
Pump issues, level display problems, and on-site system problems – check them one by one; the cause can always be identified.
It’s all due to vacuuming – or partial vacuuming – that causes the problems……
Based on your description, it’s likely not a problem with the pump; it might be an issue with the level gauge. The local level gauge should be compared with the remote-level gauge to determine whether it reflects the actual liquid level. It could also be a problem with the tower’s operation; unstable operation may also cause rapid changes in liquid level.