大比例掺渣下稠油焦化运行的问题及对策

总结了克拉玛依石化公司稠油焦化装置大比例掺炼劣质渣油的经验，针对焦粉携带、油气线结焦、轻油收率降低及影响装置长周期运转等问题，对装置操作进行了优化调整和技术改造，使大掺渣率生产时蜡油收率小于8%，同掺渣率时汽油+柴油收率提高约4.5个百分点，掺渣率小于20%时轻油收率大于80%。同时，减少了焦粉携带，保证了装置长周期运行。

PROBLEMS AND SOLUTIONS OF CRUDE OIL DELAYED COKING UNIT PROCESSING HIGH BLENDING RATIO OF RESIDUE

The experiences of enhancing residue blending ratio in the viscous crude delayed coking unit of Karamay Petrochemical Company were summarized including solving the problems of entraining fine coke powder in oil vapor, coking of oil pipeline, lowering light oil yield and shortening running cycle. After optimizing operation conditions and revamping, the coker gatch yield was less than 8% at high residue blending ratio; at the same residue blending ratio as compared with before revamping, the distillate yield increased 4.5 percentage points; when the residue blending ratio was less than 20%, the light oil yield could be over 80%. Furthermore, the entrainment of coke powder in oil was reduced and the operation cycle of the unit was prolonged.