Reasons for the increase in pressure difference in the propylene column
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Due to maintenance work on the propylene tower, water was injected to remove the material and carry out replacement processes. After the tower was restarted, the pressure difference increased, and it became impossible to increase the processing load. (The pressure difference at the bottom of Tower 3 is normal; the pressures at the top of Tower 3 and at the bottom of Tower 4 are roughly the same, while the pressure difference between the top and bottom of Tower 4 is around 2 kilograms.) Reducing the feed rate or lowering the reflux pressure difference did not help improve the situation. What is the most likely cause? In my opinion, could there be a problem with the trays? ?
Personally, I think it might be the clogging of the trays during the filling process; otherwise, such a high pressure difference would not occur. Additionally, check the cooling equipment at the top of the tower