How to reduce the production fluctuation of delayed coking fractionator?
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During the production of the coking unit, the gas heating tower and switching four-way will greatly affect the smooth operation of fractionation. I would like to ask you, bosses, how to operate to reduce fluctuations in this area?
There have been many discussions on this topic on the forum. You can search for it yourself.
The pressure is raised in advance, and the absorption tower is also raised. The furnace outlet temperature is appropriately raised by a few degrees during the period from changing the tower to the big blowing. Some devices maintain the pressure stability by pumping crude gasoline into the coke tower. Good experience in practice should be retained
During normal operation, the oil and gas isolation main valve for defractionation should be closed down and opened up during gas heating tower operation. Is this feasible?
It is not good to open the defractionated oil and gas isolation main valve when heating the gas tower. In order to ensure the preheating speed of the coke tower, it sometimes has to be closed down. In fact, as long as the temperature of the evaporation section is well controlled during fractionation and the reflux volume is appropriately adjusted according to the preheating speed, the fluctuation will not be large, except for the larger fluctuation when cutting the tower, but it will only be within half an hour.