沸腾床渣油加氢-焦化组合工艺探讨

针对劣质渣油加工，分别采用沸腾床渣油加氢-焦化组合工艺与单独焦化工艺两种技术路线进行探讨，以选择其适合的加工技术路线。结果表明，劣质渣油原料经沸腾床加氢，产品杂质含量显著降低。在双反应器温度基准+5/ 基准+5、基准空速条件下，劣质渣油加氢产品的S、Ni、V含量分别下降了90%、95%、99%。与劣质渣油原料相比，沸腾床加氢减压渣油的性质得到极大改善。与单独焦化工艺相比，采用组合工艺加工劣质渣油，总液体产率提高了13.57%，增产高附加值产品的能力明显提升，从而大幅度提高经济效益。同时，该组合工艺具有改善油品稳定性、原料适应性广、工艺灵活等明显优势, 是提高原油资源利用率的较佳方案。

Study on the Combined Process of Ebullated Bed Residue Hydroprocessing and Coking

Technical test and economic comparison on two technical routes of the combination process of ebullated bed hydrotreating with coking and direct coking were done to choose suitable for inferior residue processing. The results showed that the impurity of the product from ebullated bed residue hydroprocessing of inferior residue feedstock was significantly reduced. Compared with inferior residue feedstock, hydroprocessed vacuum residue was greatly improved, whose impurity content was significantly reduced. The S, Ni, V contents of hydroprocessed residue were decreased by 90%, 95%, 99%, respectively, under reaction temperature of base+5/ base+5 and base LHSV. Compared with coking process, the combination of ebullated bed and coking could process inferior residue feedstock, from which the total liquid volume was increased by 13.57% and the ability to increase production of high value-added products was significantly improved, thus the economic efficiency was greatly enhanced. Meanwhile, the combination process has obvious advantages of improving stability, wide adaptability of feedstock and flexible process, which is the preferred option to improve crude oil resource utilization.