(Discussion thread) The cross-line valve of the screw pump is almost completely closed, causing high vibration
Thread Content
Yesterday afternoon, pump B, the twin-screw pump, operated normally, but when the cross-flow rate was increased slightly, the pipelines and the pump experienced significant vibration； By around 6 p.m., almost all the cross-connections were closed; the screw pump and pipelines experienced significant vibration. After the operator switched to Pump A, venting was carried out at the high point of Pump B, and gas was present. The test run of the pump did not yield significant results. About half a barrel of dirty oil was removed from the low point of the inlet filter, and the vibration decreased slightly after this test run ； After the cross-line valve is fully opened, the vibration of the pump and pipelines decreases and operation becomes smoother, but the outlet pressure remains low, at around four kilograms. When the cross-line valve is closed, the pressure stays at eight and a half kilograms; however, the pump and pipelines still vibrate. The pressure gauge before the inlet filter remains stable at three kilograms, while the pressure gauge after the filter fluctuates between three kilograms and four and a half kilograms. Does this indicate that the inlet filter is clogged, resulting in insufficient flow at the inlet?
Such issues should be indicated by instruments at the inlet of each device, allowing one to determine whether the filter is operating within the normal range. The so-called on-site operators need to have the ability to identify various problems that arise during the normal operation of equipment. Bypassing may involve a shortcut, a bypass route, or a return path; control valves are installed in the process pipelines to regulate the pressure at the outlet and the inlet. There are settings for individual units, as well as those for the main piping system. When in use, the effects controlled by each control point vary, especially in terms of energy consumption. For reference. As a friendly suggestion, since international SI standards have been in use for many years, it would be better to standardize the way units are referred to or labeled.
A slight blockage in the filter can cause vibration due to pump evacuation
I also suspected that the filter was slightly clogged. There is a drain valve below the filter; releasing some water through it had some effect, but no further action was taken. I decided to keep it running for now, as the operator didn’t clean the filter either