Story One: A memorable incident from the pump operation. (Reply for a prize)
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Discover life, enjoy life! A thing that remains vivid in memory from the pump operation. It can be something pleasant or unpleasant.
When switching pumps, I forgot to turn the shaft by hand; fortunately, a colleague reminded me, which prevented an accident. It turned out that the diaphragm of the coupling on the backup pump had been removed, which almost led to an accident
It wasn’t me who operated it, but I was at the scene: when switching pumps, I stopped the pump that was switched to standby mode! ! !
When switching pumps, the running pump was stopped directly; upon hearing that something was wrong, the running pump was quickly restarted, which caused fluctuations in the operation and nearly led to a quality incident.
Various checks before replacing the pump, such as oil level, lubricant condition, flow rate, and grounding. Make sure the preparatory work is done properly. . .
We now have a labeling system for operating pumps, which can prevent similar incidents from occurring. .
When switching between the two variable-frequency pumps, the DCS generally reduces the frequency of one pump while increasing the frequency of the other. However, when the frequency is low, this can cause backflow of the material, leading to fluctuations in outlet pressure；
Haha, I have the funniest thing: there was no liquid inside the pump, and the filter at the pump’s inlet had been removed, yet it still started running. . . It stopped right away, it’s fine!
In previous companies, when switching pumps, the standby pump was not started; instead, the operating pump was stopped directly, which caused the centrifugal compressor to shut down
During the process of switching pumps due to high temperature, the pump that was about to be put into operation was not carefully inspected. After some time after the switch-over, the pressure gauge on the pump’s outlet fell off, causing hot oil to spill and catch fire. Fortunately, the personnel present did not leave and managed to extinguish the fire, after which the original operating pump was switched back in use. The reason is that after the standby pump operated for a long time, the pressure gauge became loose due to vibration; when the pump started up and the pressure increased, the gauge fell off, causing an accident.