Regarding the issue with the water feed to the stripping tower?
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When there is no material in the feed tank of the stripping tower. It is necessary to stop feeding the stripper, and only open the steam at the bottom of the feed tower to a certain degree. But why does the liquid level in the stripping tower rise very rapidly when the water inflow is low? (The liquid level has a set value); the temperature will also increase. But after a while. The liquid level will drop. As a result, the temperature will drop. Dear experts, could you please explain this to me?
This is likely due to the material in the upper and middle sections of the tower gradually descending toward the bottom of the tower; as the amount of steam supplied decreases significantly, the material in the tower descends more rapidly, which in turn causes the liquid level to rise quickly. Later, as the bottom pump pumped fluid and the amount of material descending within the tower gradually decreased, the level of material at the bottom of the tower also dropped, along with the temperature of the liquid.
This is probably a problem related to automatic adjustment. Automatic control is designed to regulate flow rates under normal, stable conditions; a sudden change in the flow rate acts like a signal disturbance, and it takes some time for the automatic control system to eliminate this disturbance and resume normal regulation. In our factory, there have been instances where, due to disturbances in the automatic control system, the valves lost control and their opening degree kept fluctuating between 0 and 100. When inquired about the instrumentation issue, it was explained that this phenomenon is rare and difficult to resolve; efforts should be made to minimize sudden drastic changes. The volume area at the bottom of the distillation tower where the liquid level is displayed is very small, so even slight fluctuations can result in significant changes in the liquid level