Handling And Utilization Of Vacuum Residue From Slurry-bed Hydrocracking Of Venezuela Heavy Oil

This paper made a detailed analysis on the property of venezuela heavy oil and the slurry-bed hydrocracking vcuum residue, mean while through harmonic coking, harmonic asphalt and hydrocyclone separation technology, vcuum Residue was processed. And the comparison of the results had been made to optimize the best using scheme of venezuela heavy crude oil slurry-bed hydrocracking vcuum residue.The result showed that venezuela heavy crude oil was high sulfur, high metal containing and Low-grade heavy oil. After slurry-bed hydrocracking, vacuum residue became worse and went against the further processing. When the vacuum residue was mixed with residue for coking, liquid yield was low, char yield was high; When the vacuum residue was used as blended asphalt, Only adding 5% this vacuum residue, can the ductility of asphalt met the requirements of HA - 90. So the direct application of this vacuum residue was difficult. It could got a good result when hydrocyclone separation technology was used in the process of separating vacuum residue. When solvent was the mixture of 120^# solvent oil and 200^# solvent oil (the volume ratio is 1:1), temperature was 80℃and the pressure was 1.0 MPa, the vcuum residue can be separated well. In this conditon, we got about 90% top flow, which could be used to be circle vacuum residue, and got about 10% under flow, which could be used to be swing vacuum residue. The carbon residue and asphaltene was increased obviously in the swing vacuum residue. At the same time,in the swing vacuum residue enrichment of most of the reduced pressure tail oil toluene insoluble. So the infure worked of the swing vacuum residue was very difficult.It was researched that through the modification of the swing vacuum residue, the viscosity of the swing vacuum residue was reduced, softening point was raised. In this condition the swing vacuum residue could meet the requirements of grindabilty for solide fuel. The softening point of swing vacuum residue can be raised more than 200℃:when the reaction temperature for 350℃, ventilation to 110 ml·min_-1, reaction time for 4 h. Then the swing vacuum residue can meet the bond index requirements of industrial fuel (bond index<50). The content of water, volatile content and ash content can meet the requirements of solid fuel.In the summary, hydrocyclone separation can deal with vacuum residue from slurry-bed hydrocracking of Venezuela heavy oil better. Treated by the technology, about 90% of vacuum residue can be used as a recirculating, the rest can be used as solid fuel directly after modified.