Problems and countermeasures of mixed refining Venezuila's sulfur- rich crude oil

In order to expand crude oil resource, the mixed raw material of Russia' s crude oil and Venezuila's crude oil was used in the 3. 5 Mt/a atmospheric and vacuum distillation unit of Liaoyang Petrochemical Company,PetroChina. The density of Venezuila's crude oil was 942. 7 kg/m3,the sulfur mass fraction was 2. 7% and m( Russia's crude Oil/m( Venezuila's sulfur) was 3 ∶ 2. The results showed that Venezuila's crude oil had significant impacts on atmospheric and vacuum distillation,delayed coking,hydrocracking as well as equipment and safety. The main countermeasures were the improvement of desulfurization capacity and the precaution of producing shot coke.