Judgment of the liquid level in the scrubber tower
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The liquid level gauge in the scrubber is no longer showing a reading; we can determine the liquid level in the scrubber by using the pressure difference across it. How should we go about doing this? Please feel it **a little!
Three gauge level gauges? What about the flip-board local level gauge?
Typically, a scrubber tower is equipped with four level gauges; if any of them stop working properly, it is necessary to take the tower out of service for maintenance, in order to prevent low liquid levels in the tower from causing the syngas to escape to the high flash point area. It is very dangerous for high-pressure gas to leak into low-pressure areas.
I think it’s difficult for the liquid level to rise to the high-pressure flash vessel. Since the connection point of the drainage pipeline at the bottom of the scrubber tower is below the suction point of the quench water pump, if the liquid level in the scrubber tower is really low, it is the quench water pump that is affected first. So I think, in order to avoid such situations, the control room needs to do its best to maintain system stability. I’m not sure whether your pressure difference measurement is reliable or not; if it is, it can be used to roughly determine the liquid level in the scrubber tower. In that case, it’s necessary to take into account both the flow rate of the cooling water and the current consumption of the cooling water pump in order to make an accurate assessment. In other words, when there are fluctuations in the flow rate of the cooling water pump, significant changes in current, or unusual noises at the site, it can be inferred that the liquid level in the scrubber tower has almost been depleted. Remember this pressure difference value and promptly add water to the scrubber tower – don’t wait until that pressure level is reached again before adding water. If the pressure difference method also doesn’t work, then the only option is to rely on the chilled water approach. However, if such brief interruptions occur frequently over time, it has a significant impact on the chilled water pump. One last question: are your on-site level gauges not working well either? You can rinse the area more thoroughly to see if it’s possible to determine the liquid level.