What to do with the tower
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I encountered such a problem when working on a diesel hydrogenation project. The gas-liquid load of the theoretical plate under the feed plate of the product fractionation tower changed greatly. The feed is at the 10th plate, and the gas phase load of the 11th plate is an order of magnitude less than that of the 10th and 12th plates, while the 13th plate is almost an order of magnitude more than the 12th plate. I think this is because the air cooled down and turned into a liquid phase. But how to deal with the tower diameter of this tower. The tower diameter in the rectification section is only 1.2 meters, and the tower diameter in the stripping section reaches 3.6 meters. What should we do with such a tower? I would also like to ask whether the gas and liquid load of the tower should not change too suddenly by changing the process.
Have you calculated it accurately? Why is there such a big difference in load? Is the feed temperature too low? If the diameter of the column is small for rectification and large for stripping, it can be done. It can also be done with a single overflow at the top and a double overflow at the bottom. But the difference in diameter is such a big difference. I don't know if this is the normal process.