Is the catalyzed diesel fuel within the normal range in terms of boiling point, has a low freezing point, and high color intensity?
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Why is the catalyzed diesel distillation range normal, the freezing point negative 20 with no solidification, and the colority above 5.0?
This may be due to the higher proportion of unsaturated hydrocarbons, polycyclic aromatic hydrocarbons, or other high-molecular-weight compounds in the catalyzed diesel. These substances increase the color intensity of diesel, and because they have a low freezing point, they allow diesel to remain fluid at lower temperatures as well. .
Incomplete separation: the light components fail to rise, while the heavy components fail to descend; there is a possibility of foam being carried along, or the trays may be overturned, which could lead to salt formation
Yesterday, the trays were cleaned with acidic water, but it didn’t have much effect; the oil in the middle section still has a yellow color, which is quite problematic
Increase the liquid phase consistency, the mid-stage reflux flow rate, the oil reprocessing backflow to the tower, and adjust the upward flow of the slurry in the tower accordingly
Last night, the heat exchanger that facilitated heat exchange between the top cycle oil and the feed oil was removed; as a result, the color of the diesel gradually decreased to 4.0. Thank you