What is the maximum temperature at the bottom of a delayed coking fractionation tower? ?
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When delayed coking heavy oil is fed into the fractionator, what is the maximum bottom temperature that can be achieved while maintaining a low recycle ratio in order to avoid coking? ? ? ?
The small circulation ratio is generally around 360 degrees; coking is mainly caused by asphaltenes and a high amount of resins. Coking at the bottom of a normal distillation tower is rare.
Generally, the bottom temperature of the tower does not exceed 375