Drum flow rate

#Here’s a quick reply: #The drum liquid level is generally controlled using a three-element control method; it’s not easy to determine the water volume based solely on the liquid level difference. The steam generated by the drum consumes deoxidized water, and it’s different from a simple raw material buffer tank – the amount of water can be calculated based on the changes in incoming and outgoing materials as well as the liquid level

I’m afraid to ask, but does traffic need to be calculated? What’s the use of calculating it? The pump turns on at low water levels and turns off at high water levels~

That’s indeed the case with gas boilers, which are controlled by electrodes; coal-fired boilers, on the other hand, have a more complex control system

I see, it’s my lack of knowledge; I’m the one who deals with the design of gas boilers~

The purpose of maintaining the drum water level during boiler operation is to ensure a balance between the boiler’s evaporation rate and the flow rate of feedwater, while keeping the drum pressure constant; this prevents excessive fluctuations in water level from affecting steam quality as well as the safety of the boiler’s water circulation system. Therefore, it is meaningless to calculate the required feedwater flow rate based on the difference in drum water level. In fact, when the boiler pressure remains constant and there is no blowdown, the feedwater flow rate equals the steam flow rate, and the drum water level stays constant; if the feedwater flow rate exceeds the steam flow rate, the drum water level rises, and vice versa. Finally, during boiler operation, the boiler feed water must not be interrupted; therefore, the feed water pump must never stop.