Reasons for pressure fluctuations in evaporative hot water towers
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I’ve been trying to figure out the reasons for the pressure fluctuations in the evaporation hot water tower for years, but I still can’t understand it. Why do these periodic fluctuations occur? What happens is that the gas flow rate out of the evaporation hot water tower suddenly increases, causing the pressure to rise sharply; then the flow rate drops to 0, and the pressure also drops suddenly. This cycle repeats over and over again. No matter how I adjust the amount of black water or gray water fed into the evaporation hot water tower, the same phenomenon occurs. Why does he fluctuate like this? ? It’s been bothering me and I can’t figure it out. The trend chart is as follows: a trend chart with an expanded time scale. For additional information, the pressure control in our evaporative hot water towers is done manually; due to the constant fluctuations in pressure, it’s not possible to use automatic control
I’m guessing that there might be a place where a water seal has formed at the back?
Are there any ways to regulate pressure? Check the control valve to see if the PID settings are appropriate; if not, determine where the pressure gauge is connected and whether it’s possible for the phenomenon mentioned above to occur
The pressure control in our evaporative hot water towers is done manually; due to the constant fluctuations in pressure, it’s impossible to use automatic control
There are three pressure measurement points on the evaporative hot water tower: at the bottom of the tower, at the top, and at the bottom part of the tower. The synchronous fluctuations in these three pressures indicate that the pressure indeed fluctuates in this manner, and it is not a problem with the measurement points
Manual control does not mean that there are no fluctuations in the valves on-site; by checking those valves, it can be seen that pressure fluctuations in the evaporative hot water tower as well as fluctuations in the water flow rate at the inlet can also cause pressure variations
The fluctuation curve is very similar to that of the lock funnel; it represents either a reason for arrival or a reason for departure, so we should investigate further along this line