渣油掺炼煤焦油的减压蒸馏过程

摘要

为提高资源利用率,考察了掺炼煤焦油对渣油减压蒸馏的影响。结果表明,在渣油中掺炼一定比例的煤焦油可以提高其减压蒸馏的拔出率,为后续加工提供更多的原料。相比较于纯渣油,在550℃对渣油掺炼20%的煤焦油进行蒸馏,可多获得近15个百分点的催化裂化加工原料。扣除煤焦油馏分油后,渣油的拔出率也提高5个百分点。同时,蒸馏残渣的软化点有一定的提高,更适合用做沥青原料。最后探讨了煤焦油对渣油蒸馏过程的强化机理。%The distillation process of vacuum residue blended with coal tar was investigated in terms of of resource efficiency.The results indicated that the distillation yields of vacuum residue had been improved.At 550 ℃,more than 15% feedstock for catalytic cracking plant was obtained when blended with 20% coal tar compared to that from pure vacuum residue.And the yield of the distillates was increased by 5%.The softening point of residual oil was increased and colloidal system of vacuum residue was changed with the addition of coal tar,which made the distillation residue a more appropriate candidate for asphalt.The mechanism of intensifying distillation was also discussed based on the characteristics of petroleum system.