Vapor phase temperature of the diagonal baffle
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At what temperature above the vapor temperature in the herringbone baffle of a distillation column does coking tend to occur?
In the case of coking, it mainly depends on the ratio between the gas phase and the liquid phase; if there is less liquid phase and more gas phase in the reflux, carbonization and coking will also occur. Therefore, it is necessary to consider the temperature difference between the liquid phase and the gas phase in order to determine the gas-liquid contact condition at the chevron baffle.
The gas phase temperature at the herringbone baffle of our distillation column once reached over 400 degrees, yet coking did not occur. This is likely related to the properties of the crude oil, as well as factors such as reaction and fractionation operations.
We must definitely not exceed 380; this can be controlled by the amount of slurry circulation and the amount of oil returning to the reprocessing process
At what temperature above the vapor temperature in the herringbone baffle of a distillation column does coking tend to occur? This is mainly related to the properties of the raw materials; furthermore, ensuring a certain level of reflux helps to reduce coking tendencies. Generally, the gas phase temperature is controlled based on the thermal balance of the entire distillation tower; of course, this is done while meeting the production requirements. It is usually kept at a low level – around 380 degrees in our case. When the temperature exceeds 380 degrees, coking occurs more rapidly.