After the injection pump of the gasoline and diesel hydroprocessing unit stopped operating, it needed to be started up again as soon as possible

Make sure everything is in order; start the backup pump as quickly as possible, and at the same time conduct a thorough inspection of the pump that is currently in use. Pumping units are generally vertical centrifugal pumps that operate at high pressure and high speed. If they stop operating unexpectedly, although check valves are available, past incidents have shown that problems such as high pressure leaking into low pressure can occur, leading to safety accidents. Safety should be given top priority, while salt accumulation is a secondary concern. Additionally, although hydrogenation generates a small amount of water, it is also necessary to consider the process control aspects related to the high and low level indicators, as these can cause fluctuations in the system and in the acidity of the water, thereby affecting both this unit and the units downstream.