关键词: 沸-固复合床, 渣油加氢, S-RHT, 固定床, STRONG, 沸腾床, 加氢生成油, 氢含量

Abstract:

To meet the demands of refinery transformation and development, FRIPP has developed an ebullated-fixed bed residue hydrotreating process, based on S-RHT fixed bed process and STRONG ebullated bed process. A single ebullated bed reactor is used for heavy oil feedstocks pretreatment, which greatly improves the feeding properties of fixed bed, and multiple fixed bed reactors are used for hydrofining, which can significantly improve the quality of hydrogenation products. The pilot test data show that the metal(Ni and V) content of inferior residual oil processed by ebullated bed reactor is reduced from 123.1 μg/g to 38.9 μg/g, the metal content is 8.8 μg/g after processing by fixed bed reactor, and the demetallization rate can reach 92.85%; after hydrogenation treatment by ebullated-fixed bed, hydrogen content of the inferior residual oil is increased by 1.58 percentage points, the hydrodesulfurization rate can reach 90.69%, the carbon removal rate of residual can reach 70.30%, the denitrogenation rate can reach 53.73%, and the asphaltene conversion rate can reach 82.83%. The ebullated-fixed bed residue hydrotreating process realizes the deep hydrogenation conversion of heavy residual oil, gives full play to the characteristics and advantages of ebullated bed and fixed bed hydrotreating process, and can provide high-quality feed for subsequent processing units.

Key words: ebullated-fixed bed, residue hydrotreating process, S-RHT, fixed bed, STRONG, ebullated bed, hydrotreated oil, hydrogen content