Why is the temperature of the liquid phase in the upper layer of a atmospheric pressure column higher than the temperature of the gas phase in the lower layer?
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Why is the temperature of TI16207 (318.91°C), obtained from the third extraction line, higher than the temperature of TI16212 (316.9°C), which is the temperature of the gas phase obtained from the lower layer? Previously, the latter value was always higher than the former, but today the situation has reversed. I’m not sure why this is happening; I hope everyone can help explain it. Also, since the unit started operating, the vapor temperature at the bottom of the atmospheric pressure tower, TI16214 (306.4°C), has been much lower than the temperatures at the surrounding points. I don’t understand why this is the case either; I seek expert advice on this matter. Thank you!
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