Relationship between pipeline pressure, flow rate, and control valve position
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When the control valve in the boiler water pipeline remains stationary (there is only one control valve in the pump outlet pipeline, after which the water goes into the steam drum), the flow rate decreases, while the pressure at the pump outlet increases instead of decreasing. The current drawn by the boiler feed pump also drops. What could be the possible reasons for this? It hasn’t been added to the valve position map, but the valve isn’t moving
The most likely scenario is that the pressure in the drum increased, which in turn means the pressure in the steam pipeline system rose
Does \"flow rate\" refer to the water supply flow rate or the steam flow rate? If the steam flow decreases, that is, if the load reduces, then the boiler pressure will increase, and the outlet pressure of the feed water pump will also rise.
In my understanding, as the boiler load decreases, the feedwater flow rate drops, which in turn causes the boiler pressure to increase, along with the feedwater pressure.