Boiler feed pump
Thread Content
Our plant has two medium-pressure boiler feed pumps, which are used simultaneously to supply water to one boiler. Why does Pump No. 1 keep breaking down, while Pump No. 2 operates normally?
This question seems to lack specific usage details. For example, the connection status of the pump. The inlet of the pump is connected to the backup water tank. The outlet pressure of the pump, etc. The feed water pumps for boilers are generally centrifugal multi-stage pumps. Under normal conditions, pump evacuation and cavitation occur. It is the main cause of pump damage.
The most likely reason is related to the pump’s outlet flow. Several speculations: 1. Is the water supply from the two pumps far greater than the amount required by the process? But one pump isn’t enough? 2. Is it because pump number 2 is closer to the water-using equipment, or is the back pressure at its outlet lower?
To answer this question, it is also necessary to provide information on your plant’s water supply system and the operational conditions of the water pump on site, such as whether there is a drop in pressure at the pump’s inlet and outlet, and whether any oscillations occur； Whether the current has decreased or fluctuated ； Changes in feedwater flow rate ； Noise and vibration inside the pump. The water pump keeps breaking down; those components are damaged. Is the feed water pump of your plant installed in the circulation system, and is it in operation?
Here’s a bad idea: you can swap the two pumps and use them in place of each other to see if the same problem occurs. This will help determine whether the issue lies with the equipment or the piping system, allowing for further investigation of the cause. It’s a bit troublesome, hehe