Why must the distillation system be reduced to 220°C during accident handling?
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Why does the fractionation system need to be reduced to 220°C during accident handling, and where does this temperature come from? Thank you to all the experts
After the accident, feeding was stopped. To maintain the liquid levels in each tank and column for the purpose of material balance, high temperatures would inevitably cause the oil products to evaporate.
Some refineries use a temperature of 250 degrees Celsius; this is the temperature at which the hot oil circulates in the distillation system, as well as the temperature required for heating. For safety reasons, the temperature can also be reduced to 220 degrees Celsius, in order to maintain the circulation within the distillation system while waiting for the reaction system to become operational, thereby reducing the time needed to start up the process
To ensure a stable and controllable distillation cycle while enabling production to be restored as soon as possible.