Problems during the initial operation of delayed coking
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When delayed coking is started up for the first time and diesel is used for open-loop and closed-loop circulation, where should the vapor from the oil rejection tank go? How should the vapor phase in the oil rejection tank be adjusted during the open-loop and closed-loop circulation of the paraffin oil? I’m a beginner in coking, and we’ve been discussing this issue these past few days Please give me some guidance!
When diesel is used in open or closed-loop circulation, the vapor from the oil separation tank should be sent to the vent tower to facilitate dehydration； When the paraffin oil is circulated in open or closed loops, the temperature rises; the vapor from the oil rejection tank should be sent to the distillation unit, where it can be used to preheat the distillation tower, which facilitates the establishment of reflux streams in various sections later on ； I’m not sure if this is correct; I’d like the experts to discuss it
When we first started operation, during open and closed circuit circulation with diesel, the vapor from the oil separation tank should go to the vent tower; during open and closed circuit circulation with wax oil, the vapor from the oil separation tank goes to the distillation unit.
Agree with what was said on floor 2. Go to the vent tower at 120°, and switch to the fractionation tower at 150°.
Regardless of the temperature or cycle, the vapor return line of the oil stripping tank must be opened; thus, that vapor will definitely go directly into the distillation tower!
The temperature should be increased slowly, and attention should be paid to dehydration to enable the various pumps to reach their operating capacity as quickly as possible