Abnormalities in distillation operations
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In my facility, the distillation towers are operated in a tandem configuration. Recently, the liquid level in the upper tower has risen inexplicably; the control valve of the transfer pump is then opened to its full extent, but it cannot be adjusted further. Increasing the amount of water circulating helps to lower the liquid level in the reflux tank, thereby allowing the liquid level in the upper tower to be controlled. What is the reason for this rise in the liquid level of the upper tower?
These types of problems are relatively complex; it’s best to use a schematic diagram to facilitate discussion. Check whether the level gauge is working properly; if liquid enters the negative pressure tube, it will suddenly show zero. This may cause false signal cascading loading. There are also distillation abnormalities, such as flooding, which carries liquid out. I’m not exactly aware of the specific process you use; it’s just a guess, for reference only. :lol