Causes of condensate pump vibration
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This post was last edited by xuewuhen on 2010-2-3 17:26. The pipelines of the two steam condensate pumps of our company's synthetic unit have been vibrating like tamping continuously in the past few days. The vacuum of the unit is normal and has not dropped. The liquid level of the hot trap is stable and normal. The reason has not been found out. Can any experts help analyze it? If it is not dealt with, the system may stop, which is very scary!
This post was last posted by * Edited by aojungnft on 2010-2-4 00:00 I am not very clear about the specific process, pump parameters and installation gap, so I can only consider it from the general situation. If two pumps vibrate abnormally at the same time, should we question the composition of the fluid in the pump? If the heat trap is also normal, is it possible that the condensate will vaporize due to the pressure difference between the inlet and outlet when the fluid passes through the pump? Have the workloads of these two pumps been adjusted recently? According to the working curve of the pump, adjusting the load will cause changes in the inlet and outlet pressures. Has the system pressure after the pump outlet been adjusted? In other words, if two pumps vibrate abnormally at the same time, it is definitely not a problem with the pump itself, but a problem with the system. Let’s do some calculations quickly.
Sir, why do you need to run two pumps instead of one running and one standby? Personally, I think this situation is likely to occur when the pump is running at low flow. If possible, you can try to stop a pump and then open the outlet valve of the running pump. ； If it doesn't stop, try opening the valve from the pump outlet to the surface cooler.
Reply upstairs: The condensate pump is always on and ready, but no matter which one is on, vibration will occur. When vibrating, slightly open the pump inlet balance pipe valve, and the vibration will weaken. The pump outlet pressure is always greater than the delivery pipe network pressure. We analyze that there is gas accumulated in the pipeline, but where does the gas come from?
Open the balance pipe valve slightly and the vibration will weaken. So why can't we continue to open the valve? Will continuing to open it lead to increased vibration? “The pump outlet pressure is always greater than the delivery pipe network pressure. ”Do you want to express that the pressure on household registration is much greater than the pressure on the pipe network? If this is the case, it means that the outlet valve opening of the pump is relatively small, and with small flow rates, the high-pressure head is prone to vibration.
My personal feeling is that there is something wrong with your cooler. Check the water temperature. Is it higher than before? If the water temperature is high, gas will appear in the pump.
Take a look to see if the condensate is cavitating, and then check to see if the condensate pump has a return balance pipe.