Assessing the condition of the distillation column based on the pressure difference of trifluoromethane
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In this process, trifluoromethane is a by-product obtained during the production of difluorochloromethane; it enters the tower along with non-condensable gases such as nitrogen. During the distillation process for recovering trifluoromethane, the temperature of the reflux liquid often drops, the pressure at the top of the tower becomes lower than that at the bottom, and the pressure difference across the tower increases. How can one determine whether the tower is full or empty under such conditions?
A high pressure at the top of the tower indicates that it is full, while a low pressure suggests it is not full. Additionally, it is important to check whether the temperature of the reboiler at the bottom of the tower is normal; only then can an accurate judgment be made